False positive reactions. Medical search

Positive test results in subjects who do not possess the attribute for which the test is conducted. The labeling of healthy persons as diseased when screening in the detection of disease. (Last, A Dictionary of Epidemiology, 2d ed)

Syphilis serodiagnosis employing as the antigen Treponema pallidum obtained from rabbit syphilis orchitis. Treponemes are kept alive for a few hours in a special medium. When syphilitic serum and complement are added and incubated, the treponemes are immobilized, i.e., stop moving.

Serologic tests for syphilis.

A contagious venereal disease caused by the spirochete TREPONEMA PALLIDUM.

Passive agglutination tests in which antigen is adsorbed onto latex particles which then clump in the presence of antibody specific for the adsorbed antigen. (From Stedman, 26th ed)

Skin tests in which the sensitizer is applied to a patch of cotton cloth or gauze held in place for approximately 48-72 hours. It is used for the elicitation of a contact hypersensitivity reaction.

Negative test results in subjects who possess the attribute for which the test is conducted. The labeling of diseased persons as healthy when screening in the detection of disease. (Last, A Dictionary of Epidemiology, 2d ed)

Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)

Epicutaneous or intradermal application of a sensitizer for demonstration of either delayed or immediate hypersensitivity. Used in diagnosis of hypersensitivity or as a test for cellular immunity.

Serological reactions in which an antiserum against one antigen reacts with a non-identical but closely related antigen.

Serologic tests based on inactivation of complement by the antigen-antibody complex (stage 1). Binding of free complement can be visualized by addition of a second antigen-antibody system such as red cells and appropriate red cell antibody (hemolysin) requiring complement for its completion (stage 2). Failure of the red cells to lyse indicates that a specific antigen-antibody reaction has taken place in stage 1. If red cells lyse, free complement is present indicating no antigen-antibody reaction occurred in stage 1.

An immunoassay utilizing an antibody labeled with an enzyme marker such as horseradish peroxidase. While either the enzyme or the antibody is bound to an immunosorbent substrate, they both retain their biologic activity; the change in enzyme activity as a result of the enzyme-antibody-antigen reaction is proportional to the concentration of the antigen and can be measured spectrophotometrically or with the naked eye. Many variations of the method have been developed.

Immunologic techniques based on the use of: (1) enzyme-antibody conjugates; (2) enzyme-antigen conjugates; (3) antienzyme antibody followed by its homologous enzyme; or (4) enzyme-antienzyme complexes. These are used histologically for visualizing or labeling tissue specimens.

Tests that are dependent on the clumping of cells, microorganisms, or particles when mixed with specific antiserum. (From Stedman, 26th ed)

Studies determining the effectiveness or value of processes, personnel, and equipment, or the material on conducting such studies. For drugs and devices, CLINICAL TRIALS AS TOPIC; DRUG EVALUATION; and DRUG EVALUATION, PRECLINICAL are available.

A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.

The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.

Diagnostic procedures involving immunoglobulin reactions.

Histochemical localization of immunoreactive substances using labeled antibodies as reagents.

Test for tissue antigen using either a direct method, by conjugation of antibody with fluorescent dye (FLUORESCENT ANTIBODY TECHNIQUE, DIRECT) or an indirect method, by formation of antigen-antibody complex which is then labeled with fluorescein-conjugated anti-immunoglobulin antibody (FLUORESCENT ANTIBODY TECHNIQUE, INDIRECT). The tissue is then examined by fluorescence microscopy.

Techniques used in studying bacteria.

Study of intracellular distribution of chemicals, reaction sites, enzymes, etc., by means of staining reactions, radioactive isotope uptake, selective metal distribution in electron microscopy, or other methods.

The larval form of the diphyllobothriid tapeworms of the genus DIPHYLLOBOTHRIUM and SPIROMETRA. Fish-eating mammals and man are the final hosts.

Any part or derivative of a helminth that elicits an immune reaction. The most commonly seen helminth antigens are those of the schistosomes.

Sensitive tests to measure certain antigens, antibodies, or viruses, using their ability to agglutinate certain erythrocytes. (From Stedman, 26th ed)

A recurrent contact dermatitis caused by substances found in the work place.

In vitro method for producing large amounts of specific DNA or RNA fragments of defined length and sequence from small amounts of short oligonucleotide flanking sequences (primers). The essential steps include thermal denaturation of the double-stranded target molecules, annealing of the primers to their complementary sequences, and extension of the annealed primers by enzymatic synthesis with DNA polymerase. The reaction is efficient, specific, and extremely sensitive. Uses for the reaction include disease diagnosis, detection of difficult-to-isolate pathogens, mutation analysis, genetic testing, DNA sequencing, and analyzing evolutionary relationships.

Commercially prepared reagent sets, with accessory devices, containing all of the major components and literature necessary to perform one or more designated diagnostic tests or procedures. They may be for laboratory or personal use.

Serum that contains antibodies. It is obtained from an animal that has been immunized either by ANTIGEN injection or infection with microorganisms containing the antigen.

A delayed hypersensitivity involving the reaction between sunlight or other radiant energy source and a chemical substance to which the individual has been previously exposed and sensitized. It manifests as a papulovesicular, eczematous, or exudative dermatitis occurring chiefly on the light-exposed areas of the skin.

In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test.

Rational sequence of tests for pancreatic function. (1/3575)

Of 144 patients with suspected pancreatic disease in whom a 75Se-selenomethionine scan was performed, endoscopic retrograde pancreatography (ERP) was successful in 108 (75%). The final diagnosis is known in 100 patients and has been compared with scan and ERP findings. A normal scan reliably indicated a normal pancreas, but the scan was falsely abnormal in 30%. ERP distinguished between carcinoma and chronic pancreatitis in 84% of cases but was falsely normal in five patients with pancreatic disease. In extrahepatic biliary disease both tests tended to give falsely abnormal results. A sequence of tests to provide a rapid and reliable assessment of pancreatic function should be a radio-isotope scan, followed by ERP if the results of the scan are abnormal, and a Lundh test if the scan is abnormal but the findings on ERP are normal. (+info)

Defining and analysing symptom palliation in cancer clinical trials: a deceptively difficult exercise. (2/3575)

The assessment of symptom palliation is an essential component of many treatment comparisons in clinical trials, yet an extensive literature search revealed no consensus as to its precise definition, which could embrace relief of symptoms, time to their onset, duration, degree, as well as symptom control and prevention. In an attempt to assess the importance of these aspects and to compare different methods of analysis, we used one symptom (cough) from a patient self-assessment questionnaire (the Rotterdam Symptom Checklist) in a large (>300 patient) multicentre randomized clinical trial (conducted by the Medical Research Council Lung Cancer Working Party) of palliative chemotherapy in small-cell lung cancer. The regimens compared were a two-drug regimen (2D) and a four-drug regimen (4D). No differences were seen between the regimens in time of onset of palliation or its duration. The degree of palliation was strongly related to the initial severity: 90% of the patients with moderate or severe cough at baseline reported improvement, compared with only 53% of those with mild cough. Analyses using different landmark time points gave conflicting results: the 4D regimen was superior at 1 month and at 3 months, whereas at 2 months the 2D regimen appeared superior. When improvement at any time up to 3 months was considered, the 4D regimen showed a significant benefit (4D 79%, 2D 60%, P = 0.02). These findings emphasize the need for caution in interpreting results, and the importance of working towards a standard definition of symptom palliation. The current lack of specified criteria makes analysis and interpretation of trial results difficult, and comparison across trials impossible. A standard definition of palliation for use in the analysis of clinical trials data is proposed, which takes into account aspects of onset, duration and degree of palliation, and symptom improvement, control and prevention. (+info)

Computerized analysis of abnormal asymmetry in digital chest radiographs: evaluation of potential utility. (3/3575)

The purpose of this study was to develop and test a computerized method for the fully automated analysis of abnormal asymmetry in digital posteroanterior (PA) chest radiographs. An automated lung segmentation method was used to identify the aerated lung regions in 600 chest radiographs. Minimal a priori lung morphology information was required for this gray-level thresholding-based segmentation. Consequently, segmentation was applicable to grossly abnormal cases. The relative areas of segmented right and left lung regions in each image were compared with the corresponding area distributions of normal images to determine the presence of abnormal asymmetry. Computerized diagnoses were compared with image ratings assigned by a radiologist. The ability of the automated method to distinguish normal from asymmetrically abnormal cases was evaluated by using receiver operating characteristic (ROC) analysis, which yielded an area under the ROC curve of 0.84. This automated method demonstrated promising performance in its ability to detect abnormal asymmetry in PA chest images. We believe this method could play a role in a picture archiving and communications (PACS) environment to immediately identify abnormal cases and to function as one component of a multifaceted computer-aided diagnostic scheme. (+info)

Brightness alters Heidelberg retinal flowmeter measurements in an in vitro model. (4/3575)

PURPOSE: The Heidelberg Retinal Flowmeter (HRF), a laser Doppler flowmetry device, has captured interest as a research and clinical tool for measurement of ocular blood flow. Concerns remain about the range and accuracy of the values that it reports. METHODS: An in vitro blood-flow model was constructed to provide well-controlled laminar flow through a glass capillary for assessment by HRF. A change in material behind the glass capillary was used to simulate changing brightness conditions between eyes. RESULTS: Velocities reported by the HRF correlated linearly to true velocities below 8.8 mm/sec. Beyond 8.8 mm/sec, HRF readings fluctuated randomly. True velocity and HRF reported velocities were highly correlated, with r = 0.967 (P < 0.001) from 0.0 mm/sec to 2.7 mm/sec mean velocity using a light background, and r = 0.900 (P < 0.001) from 2.7 mm/sec to 8.8 mm/sec using a darker background. However, a large change in the y-intercept occurred in the calibration curve with the background change. CONCLUSIONS: The HRF may report velocities inaccurately because of varying brightness in the fundus. In the present experiment, a darker background produced an overreporting of velocities. An offset, possibly introduced by a noise correction routine, apparently contributed to the inaccuracies of the HRF measurements. Such offsets vary with local and global brightness. Therefore, HRF measurements may be error prone when comparing eyes. When used to track perfusion in a single eye over time, meaningful comparison may be possible if meticulous care is taken to align vessels and intensity controls to achieve a similar level of noise correction between measurements. (+info)

Improved methods using the reverse transcriptase polymerase chain reaction to detect tumour cells. (5/3575)

Reverse transcriptase polymerase chain reaction (RT-PCR) is increasingly used to detect small numbers of circulating tumour cells, though the clinical benefit remains controversial. The largest single contributing factor to the controversy of its value is the different approaches to sample processing. The aim of this study was to compare the sensitivity and reproducibility of RT-PCR for the detection of tumour cells after four commonly used different methods of sample processing. Using RT-PCR, one tumour cell spiked in 2 ml of whole blood was detected after analysis of separated mononuclear cell RNA, whole blood total or poly-A+ RNA. No false positives were identified with any method. However, the reproducibility of tumour cell detection was reduced after isolation of the mononuclear cell fraction. Only analysis of poly-A+ RNA had a sensitivity of 100% in all the cell spiking experiments. In patient blood samples, analysis of poly-A+ RNA increased the number of blood samples positive for tyrosine hydroxylase (TH) mRNA compared with those positive after analysis of total RNA. This may reflect high levels of cDNA reducing the efficiency of the PCR. Isolation of poly-A+ RNA increases the sensitivity and reproducibility of tumour cell detection in peripheral blood. (+info)

Extensive cross-contamination of specimens with Mycobacterium tuberculosis in a reference laboratory. (6/3575)

A striking increase in the numbers of cultures positive for Mycobacterium tuberculosis was noticed in a mycobacterial reference laboratory in Campinas, Sao Paulo State, Brazil, in May 1995. A contaminated bronchoscope was the suspected cause of the increase. All 91 M. tuberculosis isolates grown from samples from patients between 8 May and 18 July 1995 were characterized by spoligotyping and IS6110 fingerprinting. Sixty-one of the 91 isolates had identical spoligotype patterns, and the pattern was arbitrarily designated S36. The 61 specimens containing these isolates had been processed and cultured in a 21-day period ending on 1 June 1995, but only 1 sample was smear positive for acid-fast bacilli. The patient from whom this sample was obtained was considered to be the index case patient and had a 4+ smear-positive lymph node aspirate that had been sent to the laboratory on 10 May. Virtually all organisms with spoligotype S36 had the same IS6110 fingerprint pattern. Extensive review of the patients' charts and investigation of laboratory procedures revealed that cross-contamination of specimens had occurred. Because the same strain was grown from all types of specimens, the bronchoscope was ruled out as the outbreak source. The most likely source of contamination was a multiple-use reagent used for specimen processing. The organism was cultured from two of the solutions 3 weeks after mock contamination. This investigation strongly supports the idea that M. tuberculosis grown from smear-negative specimens should be analyzed by rapid and reliable strain differentiation techniques, such as spoligotyping, to help rule out laboratory contamination. (+info)

Introduction of appendiceal CT: impact on negative appendectomy and appendiceal perforation rates. (7/3575)

OBJECTIVE To evaluate the impact of appendiceal computed tomography (CT) availability on negative appendectomy and appendiceal perforation rates. SUMMARY BACKGROUND DATA: Appendiceal CT is 98% accurate. However, its impact on negative appendectomy and appendiceal perforation rates has not been reported. METHODS: The authors reviewed the medical records of 493 consecutive patients who underwent appendectomy between 1992 and 1995, 209 consecutive patients who underwent appendectomy in 1997 (59% of whom had appendiceal CT), and 206 patients who underwent appendiceal CT in 1997 without subsequent appendectomy. RESULTS: Before appendiceal CT, 98/493 patients (20%) taken to surgery had a normal appendix. After CT availability, 15/209 patients (7%) taken to surgery had a normal appendix; 7 patients did not have CT, 5 patients had surgery despite a negative CT, and 3 patients had a false-positive CT. Negative appendectomy rates were lowered overall (20% to 7%), in men (11% to 5%), in women (35% to 11%), in boys (10% to 5%), and in girls (18% to 12%). Appendiceal perforation rates dropped from 22% to 14% after CT availability. CT excluded appendicitis in 206 patients in 1997 who avoided appendectomy and identified alternative diagnoses in 105 of these patients (51%). CONCLUSION: The availability of appendiceal CT coincided with a drop in the negative appendectomy rate from 20% to 7% in all patients, and to only 3% in patients with a positive CT. Perforation rates decreased from 22% to 14%. Appendiceal CT can be advocated in nearly all female and many male patients. (+info)

Comparison of standard and CA-125 response criteria in patients with epithelial ovarian cancer treated with platinum or paclitaxel. (8/3575)

PURPOSE: To assess CA-125 as a measure of response in patients treated with paclitaxel. PATIENTS AND METHODS: One hundred forty-four patients treated with paclitaxel derived from four different trials and 625 patients treated with platinum from two trials were analyzed using precisely defined 50% and 75% reductions in CA-125. The standard and CA-125 response rates to paclitaxel and platinum were compared. In addition, we analyzed individual patient groups in which there was a difference in response according to the two response criteria. RESULTS: Patients with stable disease as determined by standard criteria who were treated with platinum and responded according to CA-125 criteria have an improved median progression-free survival compared with patients with stable disease who did not respond according to CA-125 criteria (10.6 v 4.8 months; P<.001). Standard and CA-125 response rates for patients treated with platinum (58.93% v 61.31%, respectively) and paclitaxel (30.65% v 31.67%, respectively) were very similar, as were rates of false-positive prediction of response by CA-125 (platinum 2.2% and paclitaxel 2.9%). Responders to paclitaxel had a significantly improved progression-free survival compared with non-responders by both standard criteria (median progression-free survival, 6.8 v 2.5 months; P<.001) and CA-125 criteria (median progression-free survival, 6.8 v 3.4 months; P<.001). CONCLUSION: Forassessing activity of therapy for ovarian cancer, these data show that precise 50% or 75% CA-125 response criteria are as sensitive as standard response criteria. We propose that they may be used as a measure of response in lieu of or in addition to standard response criteria in clinical trials involving epithelial ovarian cancer. Sensitivity is maintained whether patients are treated with platinum or paclitaxel. (+info)

This resulted in false-positive reactions. The specificity of Mallein tests and the efficiency and potency of it are connected ... Although Mallein is the most commonly used form of testing for glanders, cross reactions were reported between Burkholderia ...

https://en.wikipedia.org/wiki/Mallein_test

H2O The reaction is specific for glucose, as occurs in all enzymatic reactions, but it can provide some false positive results ... False-positive readings are obtained when the reaction does not take place under acidic conditions. Highly pigmented urine and ... False-positive reactions due to menstrual contamination may be seen. They also occur if strong oxidizing detergents are present ... detergents and antiseptics also cause false-positive readings. A false-positive trace reading may occur in specimens with a ...

https://en.wikipedia.org/wiki/Urine_test_strip

Lo, Y-M. D.; Mehal, W. Z.; Fleming, K. A. (1988). "False-positive results and the polymerase chain reaction". The Lancet. 332 ( ... This, however, was stymied by a number of factors, including low concentration of fetal cells, high false positive rate and the ... Lo found the relatively new technique generated a lot of false positives due to contamination. He then wondered if fetal DNA ... Lo began his research career studying polymerase chain reaction (PCR), a molecular biological technique for rapidly generating ...

https://en.wikipedia.org/wiki/Dennis_Lo

Syal K, Srinivasan A, Banerjee D (2013b). "Streptomycin interference in Jaffe reaction - possible false positive creatinine ... The Jaffe reaction, despite its nonspecificity for creatinine, is still widely employed as the method of choice for creatinine ... The Jaffe reaction's nonspecificity remains an important issue. Diabetes patients are a high-risk population to develop chronic ... By using zinc chloride in a process known as the Neubauer reaction, and then performing the Weyl's test, a colorimetric ...

https://en.wikipedia.org/wiki/Jaffe_reaction

False-positive reactions with enzyme-linked immunosorbent assay of Mycobacterium tuberculosis antigens in pleural fluid. J Med ... But culture need 6-8week with 10-20% false positive results. A rapid serological test for diagnosis, follow-up of disease ... as well as false negative reactions in malnourished children. BCG has been used as an antigen in EIAs in in vitro studies to ... The ELISA titer indicate the positive or negative result. The diagnosis of TB is most complicated. The routine diagnosis for TB ...

https://en.wikipedia.org/wiki/Antibodies_from_lymphocyte_secretions

As cells contain polyphosphate granules, sometimes Gram reaction gives false positive results. Most chemolithoautotrophic ...

https://en.wikipedia.org/wiki/Xanthobacteraceae

... most positive reactions in low-risk individuals are false positives. A false positive result may be caused by nontuberculous ... Vaccination with BCG may result in a false-positive result for many years after vaccination. False positives can also occur ... Another source of false positive results can be allergic reaction or hypersensitivity. Although rare, (about 0.08 reported ... A positive result indicates TB exposure. 5 mm or more is positive in An HIV-positive person Persons with recent contacts with a ...

https://en.wikipedia.org/wiki/Mantoux_test

This may cause false positive reactions but an individual with anxiety may also avoid real threats. This may explain why ... In positive psychology, anxiety is described as the mental state that results from a difficult challenge for which the subject ... There is a false presumption that often circulates that anxiety only occurs in situations perceived as uncontrollable or ... Anxiety is a worry about future events and fear is a reaction to current events. These feelings may cause physical symptoms, ...

https://en.wikipedia.org/wiki/Anxiety

Syal K, Srinivasan A, Banerjee D (2013). "Streptomycin interference in Jaffe reaction - Possible false positive creatinine ... Streptomycin is an antibiotic that inhibits both Gram-positive and Gram-negative bacteria, and is therefore a useful broad- ... Schatz A, Bugle E, Waksman SA (1944). "Streptomycin, a substance exhibiting antibiotic activity against gram-positive and gram- ...

https://en.wikipedia.org/wiki/Streptomycin

People with red cell agglutination may exhibit spontaneous agglutination reactions during testing, leading to a false positive ...

https://en.wikipedia.org/wiki/Red_cell_agglutination

Beuhler M, Lee DC, Gerkin R (August 2004). "The Meixner test in the detection of alpha-amanitin and false-positive reactions ... but also yielded false positives for some compounds, such as psilocin. Capillary zone electrophoresis was also developed, but ... Diarrhea and cramps are the first symptoms, but those pass, giving a false sign of remission. Typically, on the 4th to 5th day ... ring closure by fluorocyclization between 6-hydroxytrytophan and cysteine was achieved by intra-annular Savige-Fontana reaction ...

https://en.wikipedia.org/wiki/Α-Amanitin

"The Meixner test in the detection of alpha-amanitin and false-positive reactions caused by psilocin and 5-substituted ... A positive reaction of Schaeffer's test, which uses the reaction of aniline and nitric acid on the surface of the mushroom, is ... Agaricus placomyces and Agaricus xanthodermus produce false negative reactions. Sometimes referred to as "Schaeffer's reaction ... The test yields false positives for some compounds, such as psilocin. Melzer's reagent can be used to test whether spores are ...

https://en.wikipedia.org/wiki/Chemical_test_in_mushroom_identification

Older drivers expressed reduced accuracy, higher reaction times, and more false positive responses compared to younger drivers ... The reaction time to changes in the driver's peripherals is much slower than the reaction time to changes that occur towards ... Due to the fact that control personnel have delayed reaction because of change blindness, an interface design of computer work ... Stimulation of the superior colliculus improves performance and reaction time in the same way. However, recent research has ...

https://en.wikipedia.org/wiki/Change_blindness

... revisiting false-positive results using polymerase chain reaction testing". The Journal of Pediatrics. 162 (6): 1282-4, 1284.e1 ... A positive result is signified by a certain visible reaction. There are three major types of RST: First, a latex fixation test ... Therefore, if the test result is positive, the presence of GAS is highly likely. However, 5% to 20% of individuals carry GAS in ... most authorities recommend antibiotic treatment in the event of a positive RST result from a person with a sore throat. US ...

https://en.wikipedia.org/wiki/Rapid_strep_test

... to avoid false positives". Methods. 27 (2): 114-20. doi:10.1016/S1046-2023(02)00062-2. PMID 12095268. Akey DT, Akey JM, Zhang K ... It is important to ensure that reaction parameters such as temperature and salt concentration are suitable to maintain the DNA ... resulting in false positive results for methylation. Only cytosines in single-stranded DNA are susceptible to attack by ... Thus, it is important to assess the amount of DNA degradation resulting from the reaction conditions employed, and consider how ...

https://en.wikipedia.org/wiki/Bisulfite_sequencing

A reversal in the order of the reagents being added may result in a weak-positive or false-negative reaction. VP is one of the ... The reaction was developed by Daniel Wilhelm Otto Voges and Bernhard Proskauer, German bacteriologists in 1898 at the Institute ... The other three tests include: the indole test [I], the methyl red test [M], and the citrate test [C]. VP positive organisms ... A cherry red color indicates a positive result, while a yellow-brown color indicates a negative result. The test depends on the ...

https://en.wikipedia.org/wiki/Voges–Proskauer_test

Because the test pad reaction is dependent on pH, false positive results can occur if the urine is highly alkaline. ... False positive results can occur if the sample is contaminated with vaginal secretions; false negatives can occur in very ... False positive and false negative results may occur. General sources of error include abnormally colored urine, which ... False positive results can occur in samples that are contaminated or stored improperly, allowing bacteria to multiply. Test ...

https://en.wikipedia.org/wiki/Urinalysis

False-positive testing derives its name because the testing requires both a false and a positive reaction to authenticate a ... False-positive testing generally is a one time test because once done the results remain visible so while useful as part of a ... False-positive testing can also be done on documents other than currencies as a means to test their authenticity. With the ... The reaction and coloring varies depending upon the formulation. Banknotes, being a specially manufactured substrate, usually ...

https://en.wikipedia.org/wiki/Security_printing

Borst, A.; A. T. A. Box; A. C. Fluit (2004-03-09). "False-Positive Results and Contamination in Nucleic Acid Amplification ... These tags can be appended to gene specific primers for reverse transcriptase polymerase chain reaction (RT-PCR) experiments, ... Martel, Fatima; Dirk Grundemann; Edgar Schöig (2002-03-31). "A simple method for elimination of false positive results in RT- ... Since PCR is unable to distinguish between cDNA targets and genomic DNA contamination, false positives and/or erroneous ...

https://en.wikipedia.org/wiki/Webtag

... was shown to have fewer false positive reactions than the Wassermann test. Both of these early tests have been superseded by ... Although it had some false positive results, it was a major advance in the detection and prevention of syphilis.[citation ... Paracelsus likewise noted mercury's positive effects in the Arabic treatment of leprosy, which was thought to be related to ...

https://en.wikipedia.org/wiki/History_of_syphilis

... false-positive reactions can occur for a large number of reasons, the most common of which is other infections, both viral and ... Because of the issues with false positives, confirmation with a second treponemal test that is specific for T. pallidum ... This reaction is the foundation of "nontreponemal" assays such as the VDRL (Venereal Disease Research Laboratory) test and ... Additionally these tests may show false-negative when the patient's antibody titer is very high due to a hook effect (also ...

https://en.wikipedia.org/wiki/Nontreponemal_tests_for_syphilis

However, in 1908, Pozzi-Escot (who by then was living in Lima, Peru) found that the test produced false positive reactions in ... The positive color test alone should not be interpreted as positive proof of blood. A negative result is generally proof of the ... In its reaction with hydrogen peroxide, the heme center of hemoglobin behaves as a peroxidase, reducing the peroxide to water. ... The Kastle-Meyer test has the same reaction with human blood as it does with any other hemoglobin-based blood, so a ...

https://en.wikipedia.org/wiki/Kastle–Meyer_test

... both of these approaches have limitations and are known to yield false-positive reactions in fossils. Great care must be taken ... Ancestral organisms required proteins - mainly enzymes - capable of catalyzing a broad range of biochemical reactions to ...

https://en.wikipedia.org/wiki/Ancient_protein

... leading to false positive reactions in forward grouping. Cold agglutinins can usually be deactivated by warming the sample to ... Therefore, a line of red blood cells at the top of the column indicates a positive result. The strength of positive reactions ... Kell People who have tested positive for an unexpected blood group antibody in the past may not exhibit a positive reaction on ... In ABO typing, a score of 3+ or 4+ indicates a positive reaction, while a score of 1+ or 2+ is inconclusive and requires ...

https://en.wikipedia.org/wiki/Blood_compatibility_testing

A 2007 study announced an ELISA specific to Toxocara canis, which will minimize false positives from cross reactions with ... Physiological reactions to Toxocara infection depend on the host's immune response and the parasitic load. Most cases of ... In this study, the adult patient presented with eosinophilic cellulitis, hepatosplenomegaly, anemia, and a positive ELISA for T ... Steroids have been utilized with some positive results. Anti-helminthic therapy is reserved for severe infections (lungs, brain ...

https://en.wikipedia.org/wiki/Toxocariasis

... which had been modified to lower the header's volume and presumably prevent it from triggering false positive alert reactions ... The spot was distributed nationally, and after it had once been identified as the source of the false EAS equipment trips, ... "Arco Oil Radio Ads Include False EAS Header". Radio. September 9, 2010. Archived from the original on August 24, 2014. "ARCO ...

https://en.wikipedia.org/wiki/ARCO

... typically used in paleogenetics or other studies where avoiding false positives and ensuring the specificity of the amplified ... This ensures that no contaminating DNA from previous PCR reactions is present in the lab, which could otherwise generate false ... The reaction is very sensitive: only minute quantities of DNA must be present. Leveling off stage: The reaction slows as the ... The thermal cycler heats and cools the reaction tubes to achieve the temperatures required at each step of the reaction (see ...

https://en.wikipedia.org/wiki/Polymerase_chain_reaction

This ensures that no contaminating DNA from previous PCR reactions is present in the lab, which could otherwise generate false ... Suicide PCR is typically used in paleogenetics or other studies where avoiding false positives and ensuring the specificity of ... PCR is preceded by a reaction using reverse transcriptase, an enzyme that converts RNA into cDNA. The two reactions may be ... which should never have been used in any positive control PCR reaction, and the primers should always target a genomic region ...

https://en.wikipedia.org/wiki/Variants_of_PCR

Hyperthermia Hypothermia Galactorrhoea Breast enlargement in either sex False-positive pregnancy tests Allergic reaction Fits ... high blood pressure A dangerous skin reaction An autoimmune reaction A potentially fatal collection of symptoms (i.e. syndrome ... erection Fear of light A reduction in the normal homeostatic breathing reaction to reductions in plasmacarbon dioxide levels ... Impaired thermoregulation Hyperglycaemia Other hypothalamic abnormalities Blurred vision Confusion Raised ANA titre Positive ...

https://en.wikipedia.org/wiki/List_of_adverse_effects_of_chlorpromazine

... who has exaggerated the effect of false positives in polymerase chain reaction (PCR) tests to construct a false narrative that ... were later found to be false. The claim had been widely spread on social media. During the pandemic, many false and misleading ... There are false claims spread that the usage of masks causes adverse health-related issues such as low blood oxygen levels, ... Such claims are false. In February 2020, claims that Vitamin D pills could help prevent COVID-19 circulated on social media in ...

https://en.wikipedia.org/wiki/COVID-19_misinformation

Ashley Esqueda of CNET gave the film a positive review, arguing that it brought the franchise back to what made its first two ... Rahman, Abid (March 28, 2017). "'Pirates of the Caribbean: Dead Men Tell No Tales': First Reactions From CinemaCon Screening". ... its delight in its own inventions so forced and false, that it becomes almost the perfect opposite of entertainment." Michael ... On the review aggregator website Rotten Tomatoes, 30% of 294 critics' reviews are positive, with an average rating of 4.7/10. ...

https://en.wikipedia.org/wiki/Pirates_of_the_Caribbean:_Dead_Men_Tell_No_Tales

T.M. Kelley, Positive Psychology and Adolescent Mental Health: False Promise or True Breakthrough? Adolescence, June 22, 2004 T ... But, when their thinking changes, reality seems different and their reactions change. Thus, according to HR, people are ... When one chooses to take them more lightly, according to HR, the mind quiets down and positive feelings emerge spontaneously. ... The HR counselor does not attempt to get clients to change their thoughts, "think positive", or "reframe" negative thoughts to ...

https://en.wikipedia.org/wiki/Health_realization

The study found significant rates of both false positive and false negative VBA adjudicative decisions. Although VBA ... hypervigilance and intense startle reactions. Some research suggests that VA disability benefits achieve their goal of helping ... For lifetime PTSD, the proportion of false negatives was approximately twice the proportion of false positives. ... PTSD ... false positive, n. - An incorrect classification of an element as a member of a class to which it does not in fact belong, as ...

https://en.wikipedia.org/wiki/Veterans_benefits_for_post-traumatic_stress_disorder_in_the_United_States

Interview design can influence applicants' positive and negative reactions, though research findings on applicants preferences ... Giving socially acceptable, but part or completely false, answers can inflate interview scores. One simple example of socially ... employers may feel deceived by the new hire and reactions could be less positive than would have been in the interview. If ... research has shown that interviewees tend to have positive reactions to coaching, which is often an underlying goal of an ...

https://en.wikipedia.org/wiki/Job_interview

For example, a confession of love is often considered positive both by the confessor and by the recipient of the confession and ... as a way for the confessant to claim credit for a misdeed for the purpose of eliciting a reaction to that claim. In law, there ... The theory is that a reasonable person would not make such a false confession. In U.S. law, a confession must be voluntary in ...

https://en.wikipedia.org/wiki/Confession

His plan is foiled by the Ghostbusters' use of positive mood slime, disrupting his attempts to possess Oscar. Needing a host, ... Also, like Egon Spengler, Erin is prone to violent reactions when pushed too far temperamentally and has a powerful right cross ... His first attempt involved making a false call to try an arrest the Ghostbusters on trespassing warrants, though it backfires ... like Egon's past reaction to Peck. Later, during an interdimensional crossrip event caused by the town's presumed-deceased ...

https://en.wikipedia.org/wiki/List_of_Ghostbusters_characters

... then tested positive for the virus on 6 May. Testing of patient swab samples by polymerase chain reaction revealed the outbreak ... "Five conspiracy theories about monkeypox debunked as false claims start to spread online". inews.co.uk. 23 May 2022. Archived ... In reaction to the current outbreak of monkeypox, a number of countries have stated they are buying vaccines and/or releasing ... Among cases with known HIV status, 36% (2,690/7,487) were HIV-positive. A preprint suggests that cases "where a small fraction ...

https://en.wikipedia.org/wiki/2022_monkeypox_outbreak

The reactions of the Bennet family are mixed: Mrs Bennet, relieved to see a first daughter duly married, and delighted that it ... Susan Morgan regards Wickham as being designed by Austen to be a stock villain in both his "false face as a charming young man ... As the narrator reveals nothing of the new officer's past, he is seen exclusively through the positive image that Elizabeth and ... Wickham (Tom Riley) is depicted as an ambiguous character, but very positive and charming, who initiates Amanda Price into the ...

https://en.wikipedia.org/wiki/George_Wickham

"700 false news stories in Serbian tabloids in 2018". Stop Fake. 24 January 2019. Retrieved 8 February 2019. "Više od 700 laži ... By the time of Chávez's death, speculation about potential Chavista reactions to his death were compared to the sorrow felt by ... In modern Poland, Piłsudski is recognized as an important and largely positive figure in Polish history. Polish Independence ... False Numbers and Real Victory, Diwan, Carnegie Middle East Centre, June 09, 2014 Pipes, Daniel (1995) Syria Beyond the Peace ...

https://en.wikipedia.org/wiki/List_of_cults_of_personality

... increasingly began to be called into question with concerns regarding the issues of overenforcement and the false positives. ... whether firms can deploy deterrents and whether firms are safe from a reaction by their competitors and consumers. The entry of ...

https://en.wikipedia.org/wiki/European_Union_merger_law

For the most part, the effects seem to be positive in any way that's measurable." In their 1996 book Theory of Religion, ... Since the 1970s, the secular anti-cult movement has opposed certain groups and, as a reaction to acts of violence, frequently ... Cowan, Douglas E. (2003). Bearing False Witness? An Introduction to the Christian Countercult. Westport, CT: Praeger. ISBN 978- ... the classification of a religion as xiejiao did not necessarily mean that a religion's teachings were believed to be false or ...

https://en.wikipedia.org/wiki/Cult

Other US officials, however, refuted the accusations, which they called baseless and false. They stated that the SDF are still ... Turkish President Recep Tayyip Erdoğan told a press conference that Turkey had received a positive response from Russia on ... Brzozowski, Alexandra (25 October 2019). "NATO slams Turkey over Syria, lukewarm reactions to German 'safe zone' proposal". ... One expert said that the "Astana" diplomatic process, involving Turkey, Russia, and Iran, was having some positive results. ...

https://en.wikipedia.org/wiki/2019_Turkish_offensive_into_north-eastern_Syria

The change in attitudes can be illustrated by the reactions to the table manners of the Byzantine princess Theodora Doukaina in ... Even comparatively exotic products like camel milk and gazelle meat generally received more positive attention in medical texts ... "false thirst" associated with wine. Though less prominent than in the north, beer was consumed in northern France and the ... and the secretary of Leo of Rozmital wrote a very skeptical account of his reaction to being served barnacle goose at a fish- ...

https://en.wikipedia.org/wiki/Medieval_cuisine

Although this has not been proven to be entirely true or false, studies have been done which show that many children of migrant ... In the United States, migrant farm workers experience work-related bone problems, respiratory problems and allergic reactions. ... the key distinction between the programs being the requirement for Canadian employers to obtain a positive or neutral labour ... The jury also found that one of the plaintiffs was a victim of false imprisonment and retaliation." There have been many cases ...

https://en.wikipedia.org/wiki/Migrant_worker

"Scattered" also has positive connotations, however, especially in relation to farming. A farmer will "scatter" seeds to grow or ... This is seen when the speaker pleads to God to "Save me from bad wights, In false colours dressèd." (Sidney, 2009, p. 83). The ... By making the "delight" from the "heart" Sidney makes the "delight" a purely emotional reaction, whereas, without this addition ... "false colours" (Sidney, 2009, p. 83). A possibility here could be that those that represent the heraldic insignia are corrupt, ...

https://en.wikipedia.org/wiki/Sidney_Psalms

... positive reactions to Todd. Recasting Todd years later with St. John was generally considered successful by viewers and critics ... He eventually admits he only pretended to get along with Victor to lure him into a false sense of security. Victor admits that ... The montage included reaction shots of those witnessing the execution, shots of Starr crying in the presence of a lynch mob ... Todd and a rogue CIA agent force Tomás into a false confession. Todd faces difficulty bonding with Jack, who only accepts ...

https://en.wikipedia.org/wiki/Todd_Manning

Securely organized IWM: Evidence indicates that secure attachment is associated with positive appraisals of one's own ... BTT indicates that childhood sexual abuse and other interpersonal injuries create the dissociative reaction. Dissociative ... True and False Recovered Memories. Nebraska Symposium on Motivation. Nebraska Symposium on Motivation. Nebraska Symposium on ...

https://en.wikipedia.org/wiki/Betrayal_trauma

He was also positive about the New Left in the United States, predicting that it would "lead to an original form of non-Marxist ... false idea of himself' ascribed to him by Power, which has programmed him like a robot". Pasolini's polemics were aimed at ... "pernicious reactions". Pasolini generated heated public discussion with controversial analyses of public affairs. For instance ...

https://en.wikipedia.org/wiki/Pier_Paolo_Pasolini

Furthermore, the potential false positives or false negatives that may arise from a predictive genetic screen can cause ... Some people are vulnerable to adverse psychological reactions to genetic predictions of stigmatized or feared conditions, such ... DNA to a woman's lifetime exposure to estrogen can now determine a woman's probability of developing estrogen positive breast ...

https://en.wikipedia.org/wiki/Predictive_medicine

Prince Andrew also added that Giuffre's claims about dancing with him at a club in London while he was sweaty were false due to ... There was a mixed reaction by commentators to his presence, with some saying that it would send the wrong message to victims of ... Mehta, Amar (2 June 2022). "Prince Andrew tests positive for COVID, Buckingham Palace says". Sky News. Retrieved 2 June 2022. " ... On 29 October 2021, Andrew's lawyers filed a response, stating that their client "unequivocally denies Giuffre's false ...

https://en.wikipedia.org/wiki/Prince_Andrew,_Duke_of_York

Deep cleaning and other surface sanitation has been criticised as hygiene theatre, giving a false sense of security against ... COVID-19 testing methods to detect the virus's nucleic acid include real-time reverse transcription polymerase chain reaction ( ... A competition of negative feedback loops (via protective effects of interferon alpha) and positive feedback loops (via ... when there is a reduction in the predictive value of positive test results". Chest CT scans may be helpful to diagnose COVID‑19 ...

https://en.wikipedia.org/wiki/COVID-19

Antirealists point to either the many false theories in the history of science, epistemic morals, the success of false modeling ... Determining reaction mechanisms is difficult because they cannot be observed directly. Chemists can use a number of indirect ... the positive. Comte's positivism established the initial philosophical foundations for formal sociology and social research. ... That is, every genuinely scientific claim is capable of being proven false, at least in principle. An area of study or ...

https://en.wikipedia.org/wiki/Philosophy_of_science

Negative post reactions then occurred after the match. Trevor Chappell was best remembered for the incident. John the bookmaker ... A third rider, who had abandoned the Tour after a crash, was revealed to have tested positive for testosterone before the Tour ... Deflategate (2015) - during the AFC Championship Game, 11 of the 12 footballs (this was later proved to be false) under the ... 2018 Sri Lankan cricket pitch fixing and betting scandal Doping in sport Ben Johnson's positive test for steroids after his ...

https://en.wikipedia.org/wiki/List_of_sporting_scandals

May believed that this dichotomy could lead to negative anxiety that hindered life, or a positive anxiety that would lead to a ... Paul T. P. Wong's work on the meaning management theory indicates that human reactions to death are complex, multifaceted and ... What we know about human attitudes towards death indicates that Heidegger's generalization is false. Some men, and not only ... The possibility of death usually makes people more anxious if they feel that they have not and cannot accomplish any positive ...

https://en.wikipedia.org/wiki/Death_anxiety

The remainder of these hCONDELs are either false-positives or non-existent genes. hCONDELs have been confirmed through PCR with ... validation of these predicated regions of deletions through polymerase chain reaction methods produces 510 hCONDELs. ... of these identified hCONDELs were then validated computationally with 39 of these being validated by polymerase chain reaction ...

https://en.wikipedia.org/wiki/HCONDELs

He dismissed the ideas of both Marcuse and Brown as false and harmful. Eros and Civilization received a mixed review from the ... In the American Journal of Sociology, the book received a positive review from the sociologist Kurt Heinrich Wolff and later a ... Weineck credited Marcuse with anticipating later reactions to Freud in the 1960s, which maintained in opposition to Freud that ... Eros and Civilization received positive reviews from the philosopher Abraham Edel in The Nation and the historian of science ...

https://en.wikipedia.org/wiki/Eros_and_Civilization

However, the proposed tax received a positive reaction from the business community, strong supporters of the BC Liberals. Much ... Although Brown was unsuccessful, Campbell and the committee continued promoting the stadium to revitalize False Creek, which at ... "Positive Economic Indicators - Province of British Columbia". Gov.bc.ca. Archived from the original on August 14, 2010. ...

https://en.wikipedia.org/wiki/Gordon_Campbell

... canis requires the performance of additional tests given the potential for false positives. Culture of the fungus is most ... Infection triggers an acute leukocytic reaction in subcutaneous tissues, which gradually becomes highly inflammatory and leads ...

https://en.wikipedia.org/wiki/Microsporum_canis

However, due to false positives and variability in results, this test is relied upon less frequently. Some features are more or ... This therapy focuses on the idea that PNES are caused by a learned physical reaction or habit the body develops, similar to a ... The individual does not have control of the learned reaction, but this can be retrained to allow the patient to control the ... One hypothesis is that they are a learned physical reaction or habit the body develops, similar to a reflex. ...

https://en.wikipedia.org/wiki/Psychogenic_non-epileptic_seizure

The film received generally positive reviews, with the conservative press leading the way. Frankfurter Allgemeine Zeitung ... Other audience reactions included those of some teenage girls which were shocked by the placenta removal scenes and the ... described the film as "enlightening in a comprehensive and rational manner, without hypocrisy and false shame". The critic ...

https://en.wikipedia.org/wiki/Helga_–_Vom_Werden_des_menschlichen_Lebens

False Positive Reactions Female Humans Leprosy Male Syphilis Serodiagnosis Treponema Immobilization Test ... Occurrence of biologic false positive reactions with RPR (circle) card test on leprosy patients.. ... Occurrence of biologic false positive reactions with RPR (circle) card test on leprosy patients. ... Title : Occurrence of biologic false positive reactions with RPR (circle) card test on leprosy patients. Personal Author(s) : ...

https://stacks.cdc.gov/view/cdc/75154

False Positive Reactions * Humans * Medical Overuse* ...

https://pubmed.ncbi.nlm.nih.gov/26462725/?dopt=Abstract

False-Positive Reactions A small percentage of tuberculin reactions may be caused by errors in administering the test or in ... False-Negative Reactions False-negative tuberculin skin-test reactions have many potential causes (1). Nonresponsiveness to ... the reactions in low-risk children are often false-positive. School-based screening for TB infection among children was started ... A reaction of greater than or equal to 10 mm should be considered positive for these groups (Table 1). This cutoff is also ...

https://wonder.cdc.gov/wonder/prevguid/m0038873/m0038873.asp

The problem of false-positive and false-negative patch test reactions needs special consideration. To address this problem, we ... To further investigate the possibility of false-positive or false-negative patch test reactions, additional tests should be ... positive allergic reaction; erythema, infiltration and possibly papules. ++ (2+). Strong (vesicular) positive allergic reaction ... Judicious use of dilution testing will help us to discern whether a patch test reaction is false positive due to irritancy, as ...

https://www.medscape.com/viewarticle/719914_6

The presence of M streptocerca may cause false-positive reactions.. Assays to detect specific antibodies to Onchocerca and ... A skin reaction, similar to the Mazzotti reaction of onchocerciasis, develops in patients after treatment with ... Polymerase chain reaction testing for loiasis is also approved in the United States. [1] An exciting development is the advent ... DEC produces Mazzotti reactions that become severe in heavily infected persons. Slow titration of the DEC dose is advisable, ...

https://emedicine.medscape.com/article/1109642-overview

Categories: False Positive Reactions Image Types: Photo, Illustrations, Video, Color, Black&White, PublicDomain, ...

https://phil.cdc.gov/AdvancedSearchResults.aspx?Search=False+Positive+Reactions&parentid=8243&catid=10398

False-positive and false-negative results. False-positive reactions and false-negative results can have various causes. False- ... Mother with a positive TST result and no evidence of current disease. Because the positive tuberculin skin test (TST) result ... Differentiating tuberculin reactions caused by vaccination with BCG versus reactions caused by infection with M tuberculosis is ... samples by products of previous amplification and the presence of inhibitors in the sample may lead to false-positive or false- ...

https://emedicine.medscape.com/article/969401

False Positive Reactions, 2008 1 * Foodborne Botulism, 2006 2 * Foodborne Botulism, 2007 1 ...

https://stacks.cdc.gov/cbrowse?pid=cdc%3A24915&parentId=cdc%3A24915&start=460

However, false positive reactions can occur so results must be interpreted with the utmost caution. This antibody may be useful ...

https://www.fishersci.com/shop/products/mouse-anti-tag-72-clone-cc49-novus-biologicals/NBP23138301

Presidential address to the M.S.S.V.D.: Systemic disease and the biological false-positive reaction. Br J Vener Dis. 1972;48:1- ... Positive serologic evidence of syphilis, more likely remote infection: (LBXSY1 = 1 or LBXSY1 = 3) and (0 ≤ LBDSY3 , 8) and ( ... If results of this assay were positive or equivocal, the specimens were tested using the RPR test. If the RPR test was ... If the patient has antibodies to T. pallidum, a color reaction takes place. The intensity of the color development is ...

https://wwwn.cdc.gov/Nchs/Nhanes/2003-2004/L36_C.htm

A false-positive reaction may occur when testing for the presence of glucose in the urine using Benedicts solution or ... Administration of cephalexin may result in a false-positive reaction for glucose in the urine. (7.3) (7) ... Advise patients that allergic reactions, including serious allergic reactions, could occur and that serious reactions require ... 5.1 Hypersensitivity Reactions. Allergic reactions in the form of rash, urticaria, angioedema, anaphylaxis, erythema multiforme ...

https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=0edeb103-5e94-4f42-828f-c7336486c784&audience=consumer

Nonspecific reactions in the hemagglutination inhibition test for detection of rubella antibodies. Budzko, D. B., Jelinek, D. F ... Human peripheral blood B lymphocyte subpopulations: Functional and phenotypic analysis of surface IgD positive and negative ...

https://mayoclinic.pure.elsevier.com/en/persons/diane-f-jelinek/publications/?type=%2Fdk%2Fatira%2Fpure%2Fresearchoutput%2Fresearchoutputtypes%2Fcontributiontojournal%2Farticle&ordering=publicationYearThenTitle&descending=true&page=3

A false-positive reaction for glucose in the urine may occur with Benedicts or Fehlings solution or with Clinitest® tablets. ... Gram-positive and gram-negative cocci (including Peptococcus and Peptostreptococcus spp.) Gram-positive bacilli (including ... There may be a false-positive test for proteinuria with acid and denaturization-precipitation tests. ... For gram-positive isolates, the test may be performed with either the cephalosporin-class disk (30 mcg cephalothin) or the ...

https://www.rxlist.com/mandol-drug.htm

Amplification of related organisms by nonspecific primers has been shown to result in false-positive reactions. Conversely, ... Amplification of related organisms by nonspecific primers has been shown to result in false-positive reactions. Conversely, ... Cross-reaction among the Ehrlichia spp. and Anaplasma spp. is commonly recognized, and nonspecific IFA titers may develop due ... Cross-reaction among the Ehrlichia spp. and Anaplasma spp. is commonly recognized, and nonspecific IFA titers may develop due ...

https://capcvet.org/guidelines/ehrlichia-spp-and-anaplasma-spp/

Adverse Drug Reaction, False Positive Investigation Result, Joint Stiffness, Rheumatoid Arthritis, Malaise, Premature Rupture ... Reactions: Aphagia, Vomiting, Headache, Erythema, Adverse Reaction, Arthralgia, Activities of Daily Living Impaired, Swelling, ... Reactions: Arthralgia, Expired Drug Administered, Hepatitis B Adverse event resulted in: disablity Drug(s) suspected as cause: ... Reactions: Myalgia, Arthralgia Adverse event resulted in: hospitalization Drug(s) suspected as cause:. Humira Indication: ...

http://www.druglib.com/reported-side-effects/humira/reaction_arthralgia/

False-positive reactions may occur due to infection with mycobacteria other than M. tuberculosis or immunization with bacille ... The size of the induration that is considered to represent a "positive" reaction varies according to the individuals risk ... Immune-reaction; Exposure-levels; Lung-irritants; Respiratory-system-disorders; Fatigue ...

http://www2a.cdc.gov/nioshtic-2/BuildQyr.asp?s1=respiratory&f1=%2A&Startyear=&Adv=0&terms=1&EndYear=&Limit=10000&sort=&D1=10&PageNo=466&RecNo=4658&View=f&

ModSecurity issues false positive on WordPress. Security. 1. Mar 24, 2020. M ModSecurity issues since 11.48. Security. 4. Mar ... I have no idea what any of them do, and Ive no idea whether they are false positives or real ones.. Im literally working on ... I have no idea what any of them do, and Ive no idea whether they are false positives or real ones.. Im literally working on ... I believe the ones from 127.0.0.1 are false positive. I believe a cPanel script is checking /whm-server-status to make sure the ...

https://forums.cpanel.net/threads/issues-with-modsecurity-owasp-and-false-positives.557341/

... and cranberry did not cause any false-positive reactions.18 Similarly, herbal teas and drinks did not cause any false-positives ... False-Positives: In addition to false-negatives, pharmacists need to consider the potential for false-positive UDS results and ... False-negatives and false-positives from immunoassays can lead to adverse consequences for patients and providers. By ... these agents may be less likely to cause false-positives.4,11-12 Ofloxacin has also been reported to cause a false-positive ...

https://www.uspharmacist.com/article/urine-drug-screening-minimizing-false-positives-and-false-negatives-to-optimize-patient-care

... could be attributed to false-positive reactions due to the calculation of the positivity cut-off and the 1:400 serum dilution ... Samples positive in these serologic assays were used for antigen detection (9) and for viral polymerase chain reaction (PCR) ... Although cross-reactions can occur with antibodies to other subtypes, the presence of these subtypes in our samples is unlikely ... Neither Ebola virus antigens nor nucleotide sequences were detected in any of the positive or negative dog blood samples. We ...

https://wwwnc.cdc.gov/eid/article/11/3/04-0981_article

Food allergy is an all-out reaction by the immune system against food. The symptoms are usually centred on the mouth, lips and ... This alone shows that the other tests are producing a lot of false-positives: positive findings when no true reaction to the ... Worryingly, objective trials also show that the tests produce false-negatives: no reaction to a food in a patient who is ... This frightening reaction is known as anaphylactic shock. Except in a few rare cases, it comes on within minutes of tasting the ...

http://www.positivehealth.com/article/allergy-testing-1/the-elimination-diet-a-foolproof-way-of-diagnosing-food-intolerance

... reactions of women to a false positive recall : a qualitative study of women at risk of familial breast cancer. Breast Cancer ... Women held positive views on mammography but did not appear to be well informed about the potential disadvantages. These ... Patients were mainly positive about the prospect of follow-up taking place outside the hospital setting. However, some ... Reactions to diagnosis ranged from devastation to relief at having finally developed a long-expected condition. Despite their ...

https://www.brookes.ac.uk/profiles/staff/eila-watson

"A simple method for elimination of false positive results in RT-PCR". J Biochem Mol Biol. 35 (2): 248-250. doi:10.5483/BMBRep. ... The reaction mix is added to a PCR tube for each reaction, followed by template RNA. The PCR tubes are then placed in a thermal ... The two-step reaction requires that the reverse transcriptase reaction and PCR amplification be performed in separate tubes. ... For real-time polymerase chain reaction, also called quantitative real time polymerase chain reaction (qPCR) or kinetic ...

https://en.m.wikipedia.org/wiki/RT-PCR_test

... do not cause false positive reactions in BCG recipients-this means a blood test, or IGRA, is preferred for BCG vaccinated ... do not cause false positive reactions in BCG recipients. This means an IGRA test is preferred for BCG vaccinated individuals. ... The effectiveness of BCG wanes overtime but it may cause a false-positive reaction to the TST, which may complicate decisions ... Children who have a positive reaction to the TB skin test but no symptoms of TB disease should NOT be kept out of school while ...

https://www.dshs.state.tx.us/disease/tb/faq.shtm

Allergy skin tests are used to find out which substances cause a person to have an allergic reaction. These substances are ... not used to test for food allergies because of high false-positive results and the danger of causing a severe allergic reaction ... But, if the dose of allergen is large, even people who are not allergic will have a positive reaction. ... The provider then watches for a reaction at the site.. *This test is more likely to be used to find out if youre allergic to ...

https://medlineplus.gov/ency/article/003519.htm

Fix false positives for non-vue file in vue/multi-word-component-names. rule #1684 ota-meshi merged 1 commit into master from ... Fix false positives for non-vue file in `vue/multi-word-component-nam… … ... Fix false positives for non-vue file in vue/multi-word-component-names. rule #1684 ...

https://github.com/vuejs/eslint-plugin-vue/pull/1684

Several groups have addressed these critical prob- lems that may cause reaction failure or false positive results. ... They are not only the cornerstone of tasty cooking but are able to do amazing pericyclic reactions as soon as you cut them open ... When half of the chloride has been added, remove the ice water surround- ing the reaction tube and add the remaining chloride ... Checked false; 75 } 76 77 update menu state and color display trxnsocean 78 private void blackMenuItem_Click( 79 object sender ...

http://forextrading-madeeasy.com/transocean-sedco-forex-inc.html

In some persons, a positive ELISA or Western blot is due to a non-specific cross-reaction (i.e., a false positive test). ... A positive IgM test along with a negative IgG test after the first month of infection almost always results in a false positive ... Thus, because of the limitations of IgM assays and the high rate of false positives, their use should be limited to the first ... Such criteria are at variance with those recommended by the CDC, thereby resulting in a significant number of false positive ...

https://aldf.com/misinformation-about-lyme-disease/

To examine whether these animals became infected with Ebola virus, we sampled 439 dogs and screened them by Ebola virus-specific immunoglobulin (Ig) G assay, antigen detection, and viral polymerase chain reaction amplification. (cdc.gov)
For real-time polymerase chain reaction, also called quantitative real time polymerase chain reaction (qPCR) or kinetic polymerase chain reaction, see Real-time polymerase chain reaction . (wikipedia.org)
Reverse transcription polymerase chain reaction ( RT-PCR ) is a laboratory technique combining reverse transcription of RNA into DNA (in this context called complementary DNA or cDNA) and amplification of specific DNA targets using polymerase chain reaction (PCR). (wikipedia.org)
With the use of broad-range polymerase chain reaction, some bacteria have been identified or detected in new clinical syndromes. (cdc.gov)
The isolation of methods such as broad-range polymerase chain reaction (PCR) emerging pathogens serves, therefore, not only as a means for (3). (cdc.gov)
They will require confirmatory Polymerase Chain Reaction (PCR) testing. (liverpool.gov.uk)
Main outcome measure Postmortem nasopharyngeal swabs were tested via reverse transcriptase quantitative polymerase chain reaction (PCR) against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). (bmj.com)
New diagnostic methods (such as latex agglutination and polymerase chain reaction) supplement rather than supplant cerebrospinal fluid studies. (antiinfectivemeds.com)
In addition to standard blood tests, other laboratory studies employed for diagnosis include microscopy, culture, serologic testing, and polymerase chain reaction (PCR) assay (see Workup). (medscape.com)
The researchers identified 1,322 positive results (0.15 percent), of which 1,103 had polymerase chain reaction (PCR) test information. (cancertherapyadvisor.com)
Initially COVID-19 tests were done through the standard polymerase chain reaction in a major laboratory in the capital Harare and later decentralized to the provinces. (who.int)
The rapid diagnosis tests have been distributed to clinics in rural areas and results are received 20-30 minutes (at the minimum), a time reduction from up to one week in certain cases when results through the polymerase chain reaction testing had to be sent back to far-flung localities. (who.int)
The advantages of the turn-around time outweigh the supremacy of the PCR [polymerase chain reaction] in terms of technological advancement. (who.int)
Polymerase chain reaction (PCR) amplification has been developed for identification of most Borrelia species. (medscape.com)
The Epi proColon test uses polymerase chain reaction technology to determine the methylation status of this gene in plasma samples. (medpagetoday.com)
In addition to this change, polymerase chain reaction tests for syphilis can be performed by clinical laboratories that have developed their own tests and have conducted verification studies in accordance with the Clinical Laboratories Improvement Amendment (CLIA). (cdc.gov)
We used a lateral flow assay and ELISA to test serum samples from COVID-19 cases, confirmed by polymerase chain reaction assays (study group) and pre-pandemic stored serum samples (control group). (who.int)
We compared the results of two test procedures (a real-time polymerase chain reaction [PCR] assay and a commercially available ruminant antibody detection kit) on five cattle rations spiked with bovine meat-and-bone meal, or with bovine dried blood. (ucanr.edu)
Vertical transmission is a relevant concern in Brazil, as the blotting (WB) and/or polymerase chain reaction (PCR) assays prevalence of HTLV-1 infection in pregnant women ranges from as a confirmatory step. (bvsalud.org)
Detection of SARS-CoV-2 by polymerase chain reaction (PCR) on two specimens at least 24 hours apart with high Ct values 3 on both specimens AND detection of IgG or total antibody, in the absence of vaccination. (vic.gov.au)
There is possibility for false negative PCR (polymerase chain reaction) results in children, who may mount a brisk immune response resulting in a lower viral load. (vic.gov.au)

1,4 To decrease the likelihood of misinterpretation, pharmacists can help by identifying medications at high risk for causing false-negatives and false-positives and choosing medications less likely to cause these inaccuracies. (uspharmacist.com)

Some patients may get allergic reactions to this medicine. (practo.com)
Seek immediate medical attention if you notice any symptoms of allergic reactions such as skin rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, breathing difficulties, etc. (practo.com)
Allergic reactions (hypersensitivity reactions) are inappropriate responses of the immune system to a normally harmless substance. (msdmanuals.com)
Anaphylactic Reactions Anaphylactic reactions are sudden, widespread, potentially severe and life-threatening allergic reactions. (msdmanuals.com)
People who have had or are at risk of having severe allergic reactions should always carry a self-injecting syringe of epinephrine and antihistamine pills. (msdmanuals.com)
The test has 98 per cent specificity and, unlike current options, it doesn't run the risk of false-positives or causing allergic reactions such as anaphylactic shock. (newfoodmagazine.com)
While the test is the gold-standard for diagnosing food allergies, there is risk of causing severe allergic reactions. (newfoodmagazine.com)
We would reduce by two-thirds the number of expensive, stressful oral food challenges conducted, as well as saving children from experiencing allergic reactions. (newfoodmagazine.com)
The new test focuses on mast cells, which play a crucial role in triggering allergic reactions. (newfoodmagazine.com)
Mast cells activate by recognising the IgE in plasma and, in allergic patients, produce biomarkers associated with allergic reactions, which can be detected in the lab. (newfoodmagazine.com)
Parents are often afraid to feed them a food that is known to cause allergic reactions. (newfoodmagazine.com)
Allergic reactions can be scary if you've never had one before. (medlineplus.gov)
Histamine is among the substances produced in the body as part of its defence mechanism, but it also causes symptoms of different allergic reactions. (blurtit.com)

However, false positive reactions can occur so results must be interpreted with the utmost caution. (fishersci.com)
Discontinue the drug if signs or symptoms of an allergic reaction occur and institute supportive measures. (nih.gov)
False-positive reactions may occur due to infection with mycobacteria other than M. tuberculosis or immunization with bacille Calmette-Guerin (BeG) vaccine. (cdc.gov)
False-negatives can occur when the urine drug concentration is below the threshold level set by the laboratory performing the test. (uspharmacist.com)
Rarely, a more serious systemic reaction (or anaphylaxis) can occur that may lead to coughing, wheezing, swelling of the throat, or dizziness. (allergypartners.com)
Most systemic reactions occur within the first 30 minutes of the injection, which is why it is important that injections are only administered in a medical facility where patients can be observed during this time. (allergypartners.com)
Unpredictably, some allergic episodes have a late phase reaction which can occur four to twelve hours after exposure. (patient.info)
However, a false positive reaction can occur without corresponding clinical features, especially when skin mast cells are easily activated by pressure or other physical stimuli. (medscape.com)

The leaks mainly lead to false positives for influenza B. (medtechdive.com)
Looking for a pattern match on this would likely lead to false positives and would serve as a weak indicator at best. (darktrace.com)

False-negatives and false-positives from immunoassays can lead to adverse consequences for patients and providers. (uspharmacist.com)
By identifying medications that contribute to false-negatives and false-positives, pharmacists decrease misinterpretations from urine drug screens. (uspharmacist.com)
1,2 Dilute urine, the duration of time between ingestion of the drug and time of testing, and the quantity of the drug ingested may affect the occurrence of false-negatives. (uspharmacist.com)
Worryingly, objective trials also show that the tests produce false-negatives: no reaction to a food in a patient who is genuinely intolerant of that food. (positivehealth.com)
IMSEAR at SEARO: Diagnosis of mucopolysaccharidoses: how to avoid false positives and false negatives. (who.int)
Although these tests have slight possibilities of false positives or negatives, most of the time, they are highly reliable. (webextrema.com)

But this test is not known to give false positives for any Amanitas. (shroomery.org)

Once tolerance is achieved with a SCIT regimen, we don't experience allergic inflammatory reactions when exposed to allergens in the environment. (allergypartners.com)
Allergens may cause an allergic reaction when they land on the skin or in the eye or are inhaled, eaten, or injected. (msdmanuals.com)
The food allergens activate IgE antibodies, triggering symptoms such as skin reactions, itching or constricting of the mouth, throat and airways, and digestive problems (such as stomach cramps, nausea or vomiting). (newfoodmagazine.com)
Screening of a large number of allergens can cause confusion because of the possibility of false positives. (medscape.com)

FDA is advising users of the test to monitor for clusters of positive influenza B results that may be a sign that an assay tube has leaked. (medtechdive.com)
Occasionally a person may have a positive PCR result, with high Ct values, on a subset of gene targets in the PCR assay/s used. (vic.gov.au)

1,2 While a useful tool, immunoassays have poor specificity that may lead to false-positive results. (uspharmacist.com)

Diagram describing the respective places of culture-, poly- merase chain reaction-, serology- and histology-based approaches for culture of the Whipple bacillus, support the effectiveness of the diagnosis of acute bacterial infections, according to the natural this technique (2). (cdc.gov)
Symptoms suggest the diagnosis, and skin testing can help identify the substance that triggers the allergy but does not predict the severity of a future reaction. (msdmanuals.com)
Currently, doctors diagnose peanut allergy using a skin-prick test or specific IgE test but this may result in over-diagnosis or false-positives and it cannot differentiate between sensitivity and true food allergy. (newfoodmagazine.com)
The new test is specific in confirming the diagnosis so when it's positive, we can be very sure it means allergy. (newfoodmagazine.com)
Therefore, employment of a GDH EIA, which has high sensitivity, as a screening test for the detection of toxigenic strains, may prevent false-negative results, and its adoption as part of a multistep diagnostic algorithm may increase accuracy in the diagnosis of CDIs. (balkanmedicaljournal.org)

Food allergy is an all-out reaction by the immune system against food. (positivehealth.com)
Food Allergy A food allergy is an allergic reaction to a particular food. (msdmanuals.com)
Once the initial reaction has been treated, you should see an allergist to get tested for a food allergy and discuss a course of action. (medlineplus.gov)

In rare cases, people can have a whole-body allergic reaction (called anaphylaxis ), which can be life threatening. (medlineplus.gov)
Non-anaphylactic reactions tend to affect single organ systems - eg, perioral swelling or itching, gastroenterological symptoms (abdominal pain, nausea and diarrhoea and vomiting), urticaria, rhinitis and bronchospasm, angio-oedema and ultimately anaphylaxis. (patient.info)
However, their claim that both cases represented anaphylaxis cases with positive skin tests to muscle relaxants and antibiotics might not be correct for the reasons given above. (springeropen.com)
Concurrent positive skin tests to prophylactic antibiotics and rocuronium in two patients with life-threatening anaphylaxis after induction of anesthesia. (springeropen.com)

1-3 Therefore, patient care decisions are often made based on presumed positive or negative immunoassay test results. (uspharmacist.com)
Patients may purposefully attempt to hide positive screening results by adding contaminants to their urine that mask the presence of a drug, such as vinegar, soap, bleach, drain cleaner, eye drops, table salt, or ammonia. (uspharmacist.com)
Intradermal tests are not used to test for food allergies because of high false-positive results and the danger of causing a severe allergic reaction. (medlineplus.gov)
Our laboratory reports flow cytometry results as positive or negative based upon the median channel shift caused by the binding of a specific antibody. (uic.edu)
At an assumed COVID population prevalence of 2% in Liverpool, one in five LTF positive results will be false positive. (liverpool.gov.uk)
Positive test results in subjects who do not possess the attribute for which the test is conducted. (bvsalud.org)
Hundreds of thousands of at-home COVID-19 tests from Australia-based digital diagnostics company Ellume were recalled Tuesday after discovering that some tests delivered higher-than-expected false positive results. (q13fox.com)
Nearly 200,000 of those tests - the company's rapid, at-home COVID-19 antigen test - are unused and about 42,000 affected tests have been used the produced positive results. (q13fox.com)
Again, the issue can manifest in erroneous results, in this case false positives for multiple viruses in a single testing run. (medtechdive.com)
Specifically, we are addressing some false positive results, particularly for the Influenza B target, that have occurred sporadically. (medtechdive.com)
This may lead to positive results on laboratory tests that are not triggering clinical symptoms. (medscape.com)
False-positive results were seen for 0.05% of screens overall. (cancertherapyadvisor.com)
HealthDay News) - In a Canadian employer screening program, the overall rate of false-positive results using rapid antigen test screens for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is very low, according to a research letter published online Jan. 7 in the Journal of the American Medical Association . (cancertherapyadvisor.com)
Joshua S. Gans, Ph.D., from the University of Toronto, and colleagues investigated the incidence of false-positive test results in a large sample of rapid antigen tests used to serially screen asymptomatic employees at 537 workplaces throughout Canada. (cancertherapyadvisor.com)
False-positive results were seen for 0.05 percent of screens overall and 42 percent of positive tests with corresponding PCR information. (cancertherapyadvisor.com)
Sixty percent of false-positive results occurred in two workplaces 675 km apart run by different companies between Sept. 25 and Oct. 8, 2021, and all of these false-positive test results were drawn from a single batch of the Abbott Panbio COVID-19 Ag Rapid Test Device. (cancertherapyadvisor.com)
Antigen rapid diagnostic tests may return false negative results when the viral load falls below the test's detection limit, as such a negative test result cannot exclude COVID-19 infection and a repeat confirmatory polymerase chain reaction test is necessary particularly in symptomatic patients. (who.int)
Inexperience in reading smears or a low index of suspicion for the infection may also result in false-negative blood smear results. (medscape.com)
Worse, because of the low prevalence of colorectal cancer in an average-risk screening population, the test's positive predictive value was just 2.3% (95% CI 1.8%-2.9%), meaning that only about one in 50 positive screening results would be confirmed in follow-up colonoscopy. (medpagetoday.com)
However, RIDTs have limited sensitivity to detect influenza virus infection and negative test results should be interpreted with caution given the potential for false negative results. (cdc.gov)
Positive RIDT results from one or more ill persons with suspected influenza can support decisions to promptly implement prevention and control measures for influenza outbreaks. (cdc.gov)
Time from illness onset to collection of respiratory specimens for testing o Testing specimens collected within 48-72 hours of illness onset (when influenza viral shedding is highest) is more likely to yield positive RIDT results. (cdc.gov)
First, since the authors did not indicate the concentration of drugs being tested when the skin test was positive, the possibility of false-positive skin test results cannot be ruled out. (springeropen.com)
NMBAs, in particular, are well known as drugs that are prone to producing false-positive results. (springeropen.com)
Further, lack of information on both the method of determining the positive skin test and photographs of the skin test results is another reason why we suspect there could have been false-positive results in these two cases. (springeropen.com)
However, changes in the temperature and reductant composition of the feces may affect toxin stability, potentially yielding false-negative test results. (balkanmedicaljournal.org)
No room for false-positive or false-negative urine drug test results when Veritas Lab performs the examination in Healy Lake, AK, Southeast Fairbanks Census Area. (veritaslab.org)
It can take up to 90 days, or rarely, longer, after exposure for the test to return positive results, so it is important to keep testing. (medicalnewstoday.com)

Serious hypersensitivity (anaphylactic) reactions: Prior to use, inquire regarding history of hypersensitivity to beta-lactam antibacterial drugs. (nih.gov)
Anaphylactic reactions often begin with a feeling of uneasiness, followed by tingling. (msdmanuals.com)
The authors hypothesized the possible synergistic effect of antibiotics and neuromuscular blocking agents (NMBAs) on anaphylactic reactions. (springeropen.com)

Consensus clinical scoring for suspected perioperative immediate hypersensitivity reactions. (springeropen.com)

Occurrence of biologic false positive reactions with RPR (circle) card test on leprosy patients. (cdc.gov)
The only evidence of infection may be a reaction to a tuberculin skin test. (cdc.gov)
The indirect ELISA method showed a high level of analytical sensitivity in glasshouse experiments and there were no cross-reactions between the four test strains. (biomedcentral.com)
L'objectif de la présente étude conduite en Égypte était d'évaluer l'utilité d'un test de quantification de la libération d'interféron gamma (IFN‑γ) pour le dépistage des infections tuberculeuses latentes chez les contacts de patients atteints de tuberculose active. (who.int)
The median age at death among people with a positive test for SARS-CoV-2 was 48 (interquartile range 36-72) years, and 69% (n=48) were male. (bmj.com)
The voluntary recall is being taken after specific product lots reported false-positive test result rates higher than was observed in clinical testing. (q13fox.com)
FDA has alerted healthcare professionals to the risk of false positives from Roche's combined influenza-COVID-19 test. (medtechdive.com)
The PCR test, which runs on the cobas Liat System, can sporadically report false positives for influenza B or all three viruses it checks for, possibly due to two issues seen by the Swiss medtech giant. (medtechdive.com)
However, Roche has identified two issues with the test that may explain reports of false positives. (medtechdive.com)
If we relied on them alone, we'd be over diagnosing food allergies - only 22 per cent of school-aged children in the UK with a positive test to peanuts are actually allergic when they're fed the food in a monitored setting. (newfoodmagazine.com)
The researchers also found the test reflected the severity of peanut allergy - patients with more severe reactions have a higher number of activated mast cells. (newfoodmagazine.com)
The MAT test is five times cheaper to conduct than the OFC, which requires an allergist and specialist nurses on hand to monitor for adverse reactions and provide medical support if symptoms arise. (newfoodmagazine.com)
It discusses how the TST is administered, how it is read, how TST reactions are interpreted the classification of the TST skin test reaction, what are false-positive and false-negative reactions, who can receive a TST and how often the test can be repeated, what is a boosted reaction, why two-step testing is conducted, and whether TSTs can be given to persons receiving vaccinations. (cdc.gov)
The iron test for crocidolite (12001284) or amosite (12172735) was positive in 47 samples, 19 (40 percent) of which were actually true positives. (cdc.gov)
The authors conclude that, due to the difficulties inherent in interpretation of color reactions in the K2 test, the hazardous nature of the reagents used, and the lack of precision in the hands of untrained personnel working in the field, the K2 test cannot be recommended for use by school district personnel. (cdc.gov)
Test outcome did not appear to be influenced by P. falciparum infection, since 4 of 37 IgG-positive children (23 of 182 IgG-negative children) had clinical malaria, 11/37 (62/182) had asymptomatic parasitemia, and 6/37 (38/182) had fever without parasitemia, and there were no significant differences between groups. (cdc.gov)
Test done with antigen rapid diagnostic tests will most often be positive when viral loads are highest and patients are most infectious - typically 1−3 days prior to the onset of symptoms and during the first 5−7 days after the onset of symptoms - and will become negative as the patient clears the infection and recovers. (who.int)
Patients with a positive test result would be referred for diagnostic colonoscopy. (medpagetoday.com)
The positive predictive values for the blood test and for FIT were 2.7% and 15.6%, respectively. (medpagetoday.com)
While this algorithm is more time and cost effective for laboratories, it does have a ~14-40% false-positive rate, with a second treponemal test often being used to help determine what clinical action should be taken. (cdc.gov)
Clinical signs and symptoms consistent with influenza o Having clinical signs and symptoms consistent with influenza increases the pre-test probability of influenza virus infection, which increases the reliability of a positive RIDT result. (cdc.gov)
During a lie detector test, you should know your breathing as well as your reactions to the concerns. (syussankinen.com)
The test is based upon the examinee's reaction to the questions. (syussankinen.com)
A repeat with haemoglobin and platelet counts being normal (140 test for dengue IgM/IgG on day 8 of il ness was positive g/L and 156 × 109/L, respectively). (who.int)
Will Lipozene show up as a false positive or come up as anything on a u/a drug test? (blurtit.com)
No, it's unlikely that Lipozene well show up in a drug test as a false positive for meth.The reason being. (blurtit.com)
a team doctor who caused 10 thailand weightlifters including youth olympics athletes to test positive for anabolic steroids was banned for. (tcmatlanta.org)
If the result is positive, the person should speak with a healthcare professional for another test to confirm the result. (medicalnewstoday.com)

This is achieved by monitoring the amplification reaction using fluorescence, a technique called real-time PCR or quantitative PCR (qPCR). (wikipedia.org)
The cycle threshold (Ct) value of a reaction is the cycle number when the fluorescence of a PCR product is first detected above the background signal. (vic.gov.au)

Severe reactions require emergency treatment in an emergency care facility. (msdmanuals.com)
If you have a mild allergic reaction, which could include hives, itching, sneezing, or a runny nose, you should take an antihistamine if it's available and monitor for more severe symptoms, Dr. Guerrerio said. (medlineplus.gov)
If you have a more severe reaction, you should seek immediate medical attention at an emergency room or call 911. (medlineplus.gov)
Severe reactions include difficulty breathing or low blood pressure, which can cause confusion, paleness, a weak pulse, or a lack of consciousness. (medlineplus.gov)
Dr. Guerrerio said if the reaction is severe or if it involves multiple organ systems-for example the person has hives and is also vomiting-you should administer an EpiPen if you have one and call 911. (medlineplus.gov)

Antigen detection method for screening of GBS though very sensitive is however not specific with a significant false positive detection rate due to antigen cross reaction. (bvsalud.org)

Also, contacts of persons with sputum-positive smears have an increased prevalence of infection as opposed to contacts of those with sputum-negative smears. (medscape.com)
METHODS: HEV infection was defined as having positive anti-HEV IgM, anti-HEV IgG, or HEV RNA. (cdc.gov)

Promethazine prevents histamine from binding to the receptors in various parts of the body, causing the symptoms of allergic reaction. (blurtit.com)

When a negative screening result is obtained, pharmacists should carefully consider the potential for a false-negative result, especially for patients receiving UDS testing to assess compliance with a medication regimen or for those exhibiting behaviors or risk factors suggestive of drug abuse or drug dependency. (uspharmacist.com)
Patients who have autoimmune diseases, are on particular medications, or have infections may develop false positive reactions that are not caused by anti-HLA antibodies. (uic.edu)
on concurrent positive skin tests to prophylactic antibiotics and rocuronium in two patients [ 1 ]. (springeropen.com)
As evidence to support their hypothesis, they quoted a previous study that showed that patients with positive skin tests to antibiotics were more likely to have positive skin tests to NMBAs [ 2 ]. (springeropen.com)
Among the patients who were hospitalized in an intensive care unit for more than 7 days, 83.3% were positive for CDI by PCR screening. (balkanmedicaljournal.org)

Administration of cephalexin may result in a false-positive reaction for glucose in the urine. (nih.gov)
A positive result means you reacted to a substance. (medlineplus.gov)
Often, a positive result means the symptoms you're having are due to exposure to that substance. (medlineplus.gov)
There is an increased chance that tests from the affected lot numbers may give a false positive result. (q13fox.com)
To those individuals, I offer my sincere apologies - and the apologies of our entire company - for any stress or difficulties they may have experienced because of a false positive result,' founder and CEO Dr. Sean Parsons wrote in a statement . (q13fox.com)
The result is an allergic reaction. (msdmanuals.com)
Some blood gas analyzers might mistake elevated serum glycolic acid as elevated lactic acid, leading to a false positive lactic acid result (Marwick et al. (cdc.gov)
Rapid influenza diagnostic tests (RIDTs) are immunoassays that can identify the presence of influenza A and B viral nucleoprotein antigens in respiratory specimens, and display the result in a qualitative way (positive vs. negative) (1). (cdc.gov)
Be honest and use countermeasures only to ensure you don't get a false positive result. (antipolygraph.org)
However, as a result of our consumer society which is at times excessive, this aspect can be confused with a false mathematical equation: the bigger (and more expensive) the present, the more love it shows. (clementoni.com)
Since these tests can result in false positives, 'It's important that they are interpreted within the context of the patient's entire health picture,' said Dr. Guerrerio. (medlineplus.gov)
Yes, Phenergan could possibly show up as a barbiturate on a standard drug screening, and therefore could produce a false-positive result. (blurtit.com)
A positive result is not specific for a particular subtype of myeloproliferative neoplasm and clinicopathologic correlation is necessary in all cases. (marshfieldlabs.org)
In rare cases, a variant other than the V617F may be present in an area that interferes with primer or probe binding and cause a false-negative result. (marshfieldlabs.org)

Health-care agencies or other facilities should consult with the local health department before starting a skin-testing program to ensure that adequate provisions are made for the evaluation and treatment of persons whose tuberculin skin tests are positive. (cdc.gov)
It is my strong impression that anyone who undertakes such tests invariably tests positive, and that they are always told that several foods are the problem. (positivehealth.com)
This alone shows that the other tests are producing a lot of false-positives: positive findings when no true reaction to the food exists. (positivehealth.com)
Allergy skin tests are used to find out which substances cause a person to have an allergic reaction . (medlineplus.gov)
Those who had adverse reactions or quality problems with the use of the tests may report their experiences to the FDA's MedWatch Adverse Event Reporting program online or by regular mail or fax. (q13fox.com)
Equally, the agency wants users to treat tests that are positive for two or three of the viruses with caution. (medtechdive.com)
Of these 19, 11 contained only chrysotile, indicating false negative magnesium tests. (cdc.gov)
In general, false positives should be kept in mind when skin tests are positive, especially when they are positive for two or more drugs. (springeropen.com)
Hagau N, Gherman N, Cocis M, Petrisor C. Antibiotic-induced immediate type hypersensitivity is a risk factor for positive allergy skin tests for neuromuscular blocking agents. (springeropen.com)
In addition to incorrect positives, the tests might additionally provide inconsistent outcomes if the examinee is honest. (syussankinen.com)
There are a number of troubles connected with lie detector tests, which are typically the root cause of incorrect positives. (syussankinen.com)
diagnostic tests were positive for both emergency department, the initial physical examination infections. (who.int)

OBJECTIVE: To calculate the frequency of positive blood culture in clinically diagnosed cases of enteric fever and antibiotic sensitivity patterns in culture-positive cases of S.typhi Study Design: Observational Study. (bvsalud.org)

The two-step reaction requires that the reverse transcriptase reaction and PCR amplification be performed in separate tubes. (wikipedia.org)
[19] On the other hand, the entire reaction from cDNA synthesis to PCR amplification occurs in a single tube in the one-step approach. (wikipedia.org)

It is likely to cause allergic skin reactions in some people. (practo.com)

Most reactions are mild and include symptoms such as itching, sneezing, congestion, or hives. (allergypartners.com)
Reaction with hives or eczema. (hipernatural.com)

It lets teachers and students learn about reactions, equipment calibration, and more about real urine minus the obvious ordeals attached with acquiring human urine for every research project. (webextrema.com)

Diagnosing ehrlichiosis and anaplasmosis based on a combination of clinical signs, positive serology, PCR testing, and hematology with platelet count. (capcvet.org)

The presence of these analytical tools actually amplifies market reaction both to the upside and downside, according to the paper. (upenn.edu)
Also, the potential for false positives is a "big downside," Skates said. (medpagetoday.com)

The size of the induration that is considered to represent a "positive" reaction varies according to the individual's risk factors, such as occupation, recent exposure history, and competency of the immune system. (cdc.gov)
Another fundamental aspect is SHARING: a present should always be opened in the presence of the person giving it, to see the reactions on both individual's faces, and to share a moment of joy, affection and warmth. (clementoni.com)

Public health authorities should be notified of any suspected institutional outbreak and respiratory specimens should be collected from ill persons (whether positive or negative by RIDT) and sent to a public health laboratory for more accurate influenza testing. (cdc.gov)

Sometimes just inhaling a few airborne molecules of the food will provoke the reaction - several airlines have now banned those little complimentary packs of peanuts that come with the drinks so that passengers who are allergic to peanuts can fly without fear of an anaphylactic reaction. (positivehealth.com)
Following the dehydration of malate to fumarate, succinate was formed from fumarate in a further hydrogenation step, following the same sequence of molecules and reactions as in the biological reverse Krebs cycle. (bionity.com)

Systemic reactions are much less common and can range in severity. (allergypartners.com)

Below is the selection of side effect reports (a.k.a. adverse event reports) related to Humira (Adalimumab) where reactions include arthralgia. (druglib.com)

and, exotoxins that are secreted by some gram-positive bacteria and a few strains of gram-negative bacteria. (aldf.com)
The primary antibodies raised against strains UCT40a, UCT61a and UCT44b gave absorbance readings that were unambiguously negative (0.30 OD405), while those of strain PPRICI3 were ambiguous (0.50 OD405) with many false positive readings (1.0 A405). (biomedcentral.com)

both indole-negative and indole-positive), Enterobacter spp. (rxlist.com)
This negative reaction most often means that you are not allergic to the substance. (medlineplus.gov)
Sixteen cases were positive only by PCR and five culture positive aspirates were negative by PCR. (microbiologyresearch.org)
Amoxicillin is a semisynthetic antibiotic with a broad spectrum of bactericidal activity against many gram-positive and gram-negative microorganisms. (prescriptiondrugs.com)
Tuberculosis (n = 3, 50%) were mostly responsible for false-positive, while small tumor foci (n = 7, 63.6%) were mostly accountable for false-negative. (ntu.edu.tw)
Ceftazidime has activity in the presence of some beta-lactamases, both penicillinases and cephalosporinases, of Gram-negative and Gram-positive bacteria. (clustermed.info)
Positive and negative controls were run on each IFA slide. (cdc.gov)
Fifteen DBS eluates positive for HBV DNA were sequenced and all of them belonged to HBV genotype A. Thirteen samples which were negative for all HBV markers showed HBeAg false positivity. (cdc.gov)
In some cultures, such as Japan, the trait is highly valued, though sadly, this is often not the case in Western society, and such children can experience negative or confused reactions from peers and adults. (worldtruth.tv)
In the modern world, the trait has both positive and negative aspects. (worldtruth.tv)
Do the positive effects of "pleasure" treatment exceed negative side effects in Healy Lake, AK, Southeast Fairbanks Census Area? (veritaslab.org)
Lesion sizes in Leishmania major -infected mice untreated (negative control) or treated with AmBisome (AMB) (positive control). (ajtmh.org)

Inflammatory reactions follow the death of microfilariae and are caused by the secretion of toxic products by granulocytes, the deposition of immune complexes in the tissues, and by inflammatory mechanisms induced by release of Wolbachia (bacteria infecting the filariae)‒derived products. (medscape.com)

HBsAg-positive specimens were tested for HBV genotype. (cdc.gov)

If the patient has antibodies to T. pallidum , a color reaction takes place. (cdc.gov)
Positive cross matches detected by flow cytometry suggest the presence of preformed anti-donor HLA antibodies and carry a risk of accelerated rejection and damage to the graft. (uic.edu)
This child was among 10 (27%) of 37 phase II IgG-positive children with detectable anti- C. burnetii phase I antibodies. (cdc.gov)

In the experiment, malate was initially formed from oxaloacetate in a hydrogenation reaction, even under mild reaction conditions, mimicking the first hydrogenation step in the pathway. (bionity.com)

A team of researchers has now discovered that a reaction sequence from the so-called reverse Krebs cycle-a fundamental biochemical process-can also take place without enzymes. (bionity.com)

Ellume will also directly notify consumers who have used an affected product and tested positive in the last 14 days or who used an affected product before September 17, 2021, and tested positive of the voluntary recall via email. (q13fox.com)

Anatomy1

Organisms1

Diseases3

Chemicals and Drugs3

Analytical, Diagnostic and Therapeutic Techniques and Equipment23

Phenomena and Processes3

Disciplines and Occupations2

Information Science1

Health Care4

Rational sequence of tests for pancreatic function. (1/3575)

Defining and analysing symptom palliation in cancer clinical trials: a deceptively difficult exercise. (2/3575)

Computerized analysis of abnormal asymmetry in digital chest radiographs: evaluation of potential utility. (3/3575)

Brightness alters Heidelberg retinal flowmeter measurements in an in vitro model. (4/3575)

Improved methods using the reverse transcriptase polymerase chain reaction to detect tumour cells. (5/3575)

Extensive cross-contamination of specimens with Mycobacterium tuberculosis in a reference laboratory. (6/3575)

Introduction of appendiceal CT: impact on negative appendectomy and appendiceal perforation rates. (7/3575)

Comparison of standard and CA-125 response criteria in patients with epithelial ovarian cancer treated with platinum or paclitaxel. (8/3575)

False Positive Reactions

Treponema Immobilization Test

Syphilis Serodiagnosis

Syphilis

Latex Fixation Tests

Patch Tests

False Negative Reactions

Sensitivity and Specificity

Skin Tests

Cross Reactions

Complement Fixation Tests

Enzyme-Linked Immunosorbent Assay

Immunoenzyme Techniques

Agglutination Tests

Evaluation Studies as Topic

Algorithms

Reproducibility of Results

Serologic Tests

Immunohistochemistry

Fluorescent Antibody Technique

Bacteriological Techniques

Histocytochemistry

Sparganum

Antigens, Helminth

Hemagglutination Tests

Dermatitis, Occupational

Polymerase Chain Reaction

Reagent Kits, Diagnostic

Immune Sera

Dermatitis, Photoallergic

Predictive Value of Tests

Rational sequence of tests for pancreatic function. (1/3575)

Defining and analysing symptom palliation in cancer clinical trials: a deceptively difficult exercise. (2/3575)

Computerized analysis of abnormal asymmetry in digital chest radiographs: evaluation of potential utility. (3/3575)

Brightness alters Heidelberg retinal flowmeter measurements in an in vitro model. (4/3575)

Improved methods using the reverse transcriptase polymerase chain reaction to detect tumour cells. (5/3575)

Extensive cross-contamination of specimens with Mycobacterium tuberculosis in a reference laboratory. (6/3575)

Introduction of appendiceal CT: impact on negative appendectomy and appendiceal perforation rates. (7/3575)

Comparison of standard and CA-125 response criteria in patients with epithelial ovarian cancer treated with platinum or paclitaxel. (8/3575)

Tips From Other Journals - American Family Physician

Review of False-Positive Cultures for Mycobacterium tuberculosis and Recommendations for Avoiding Unnecessary Treatment :...

HIV vaccines may induce HIV antibodies in trial participants, can cause false-positive test result

Menopause Temperature Hot Flash Metformin Can False Positive Test Pregnancy Cause - Menopause Villa-Agata

surgery Archives - TopHealthNews.net

Which Factors Contribute to False-Positive, False-Negative, and Invalid Results in Fetal Fibronectin Testing in Women with...

Patients & healthcare professionals values regarding true- & false-positive diagnosis when colorectal cancer screening by CT...

False Positives: What Over The Counter Drugs Can Set Off A False Positive Result? - The Drug Test News

Australia ends local COVID vaccine trials due to HIV false positives ⋆ The Savage Nation

Journal of Pediatrics Review - Zika Virus, Congenital Infection, and Neurologic Manifestations in Children: A Narrative Review

False positive results

How common is it for Hep B test to show false positive results?

Prenatal Non-invasive Aneuploidy Test Utilizing SNPs Trial - Full Text View - ClinicalTrials.gov

British man recovered from HIV | MetaFilter

Hospital slashes false-positive diagnoses with CDS platform | Healthcare IT News

Library | North Star Vet Clinic British Columbia

More on universalversusselected screening for thrombophilia: the hidden costs of false-positive diagnosis - Favaloro - 2006...

Guide to the Application of Genotyping to Tuberculosis Prevention and Control | False-Positive Cultures | TB | CDC

Most recent papers with the keyword All on 4 | Read by QxMD

Adding 3D Tomography to Mammography Aids in Cancer Detection, Reduces False-Positives - ZPRad

mTOR - NF-κB signaling in inflammation and cancer

FDA Alert: Potential For False Positive Result With Antigen Tests For Rapid Detection of SARS-CoV-2

HIV or not? - Forum on Safe Sex and HIV Prevention -- TheBody.com

Epidemiology, Public Health, and the Rhetoric of False Positives

Detecting false positive sequence homology - a machine learning approach | RNA-Seq Blog

A Gentle Introduction to Threshold-Moving for Imbalanced Classification

False-Positive Mammogram Results May Turn Out Not to Be: Study - Drugs.com MedNews

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