False negative reactions. Medical search

Plasma glycoprotein clotted by thrombin, composed of a dimer of three non-identical pairs of polypeptide chains (alpha, beta, gamma) held together by disulfide bonds. Fibrinogen clotting is a sol-gel change involving complex molecular arrangements: whereas fibrinogen is cleaved by thrombin to form polypeptides A and B, the proteolytic action of other enzymes yields different fibrinogen degradation products.

Techniques used in studying bacteria.

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.

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)

Radiotherapy where cytotoxic radionuclides are linked to antibodies in order to deliver toxins directly to tumor targets. Therapy with targeted radiation rather than antibody-targeted toxins (IMMUNOTOXINS) has the advantage that adjacent tumor cells, which lack the appropriate antigenic determinants, can be destroyed by radiation cross-fire. Radioimmunotherapy is sometimes called targeted radiotherapy, but this latter term can also refer to radionuclides linked to non-immune molecules (see RADIOTHERAPY).

Incorrect diagnoses after clinical examination or technical diagnostic procedures.

Blocking of the PULMONARY ARTERY or one of its branches by an EMBOLUS.

A surgical procedure used in treatment of glaucoma in which an opening is created through which aqueous fluid may pass from the anterior chamber into a sac created beneath the conjunctiva, thus lowering the pressure within the eye. (Hoffman, Pocket Glossary of Ophthalmologic Terminology, 1989)

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.

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

Process of preserving a dead body to protect it from decay.

Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.

Analog or digital communications device in which the user has a wireless connection from a telephone to a nearby transmitter. It is termed cellular because the service area is divided into multiple "cells." As the user moves from one cell area to another, the call is transferred to the local transmitter.

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)

The process of observing, recording, or detecting the effects of a chemical substance administered to an individual therapeutically or diagnostically.

A protein extracted from boiled culture of tubercle bacilli (MYCOBACTERIUM TUBERCULOSIS). It is used in the tuberculin skin test (TUBERCULIN TEST) for the diagnosis of tuberculosis infection in asymptomatic persons.

One of several skin tests to determine past or present tuberculosis infection. A purified protein derivative of the tubercle bacilli, called tuberculin, is introduced into the skin by scratch, puncture, or interdermal injection.

Prudent standard preventive measures to be taken by professional and other health personnel in contact with persons afflicted with a communicable disease, to avoid contracting the disease by contagion or infection. Precautions are especially applicable in the diagnosis and care of AIDS patients.

An active immunizing agent and a viable avirulent attenuated strain of Mycobacterium tuberculosis, var. bovis, which confers immunity to mycobacterial infections. It is used also in immunotherapy of neoplasms due to its stimulation of antibodies and non-specific immunity.

Directions or principles presenting current or future rules of policy for assisting health care practitioners in patient care decisions regarding diagnosis, therapy, or related clinical circumstances. The guidelines may be developed by government agencies at any level, institutions, professional societies, governing boards, or by the convening of expert panels. The guidelines form a basis for the evaluation of all aspects of health care and delivery.

Any of the infectious diseases of man and other animals caused by species of MYCOBACTERIUM.

Computed tomography where there is continuous X-ray exposure to the patient while being transported in a spiral or helical pattern through the beam of irradiation. This provides improved three-dimensional contrast and spatial resolution compared to conventional computed tomography, where data is obtained and computed from individual sequential exposures.

Tomography using x-ray transmission and a computer algorithm to reconstruct the image.

X-ray image-detecting devices that make a focused image of body structures lying in a predetermined plane from which more complex images are computed.

Tumors or cancer of the LUNG.

Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.

A heterogeneous aggregate of at least three distinct histological types of lung cancer, including SQUAMOUS CELL CARCINOMA; ADENOCARCINOMA; and LARGE CELL CARCINOMA. They are dealt with collectively because of their shared treatment strategy.

An imaging technique using compounds labelled with short-lived positron-emitting radionuclides (such as carbon-11, nitrogen-13, oxygen-15 and fluorine-18) to measure cell metabolism. It has been useful in study of soft tissues such as CANCER; CARDIOVASCULAR SYSTEM; and brain. SINGLE-PHOTON EMISSION-COMPUTED TOMOGRAPHY is closely related to positron emission tomography, but uses isotopes with longer half-lives and resolution is lower.

Acute and chronic (see also BRAIN INJURIES, CHRONIC) injuries to the brain, including the cerebral hemispheres, CEREBELLUM, and BRAIN STEM. Clinical manifestations depend on the nature of injury. Diffuse trauma to the brain is frequently associated with DIFFUSE AXONAL INJURY or COMA, POST-TRAUMATIC. Localized injuries may be associated with NEUROBEHAVIORAL MANIFESTATIONS; HEMIPARESIS, or other focal neurologic deficits.

The organic and psychogenic disturbances observed after closed head injuries (HEAD INJURIES, CLOSED). Post-concussion syndrome includes subjective physical complaints (i.e. headache, dizziness), cognitive, emotional, and behavioral changes. These disturbances can be chronic, permanent, or late emerging.

A nonspecific term used to describe transient alterations or loss of consciousness following closed head injuries. The duration of UNCONSCIOUSNESS generally lasts a few seconds, but may persist for several hours. Concussions may be classified as mild, intermediate, and severe. Prolonged periods of unconsciousness (often defined as greater than 6 hours in duration) may be referred to as post-traumatic coma (COMA, POST-HEAD INJURY). (From Rowland, Merritt's Textbook of Neurology, 9th ed, p418)

A relatively common sequela of blunt head injury, characterized by a global disruption of axons throughout the brain. Associated clinical features may include NEUROBEHAVIORAL MANIFESTATIONS; PERSISTENT VEGETATIVE STATE; DEMENTIA; and other disorders.

Conditions characterized by persistent brain damage or dysfunction as sequelae of cranial trauma. This disorder may result from DIFFUSE AXONAL INJURY; INTRACRANIAL HEMORRHAGES; BRAIN EDEMA; and other conditions. Clinical features may include DEMENTIA; focal neurologic deficits; PERSISTENT VEGETATIVE STATE; AKINETIC MUTISM; or COMA.

Injuries resulting when a person is struck by particles impelled with violent force from an explosion. Blast causes pulmonary concussion and hemorrhage, laceration of other thoracic and abdominal viscera, ruptured ear drums, and minor effects in the central nervous system. (From Dorland, 27th ed)

A scale that assesses the response to stimuli in patients with craniocerebral injuries. The parameters are eye opening, motor response, and verbal response.

Abnormal outpouching in the wall of intracranial blood vessels. Most common are the saccular (berry) aneurysms located at branch points in CIRCLE OF WILLIS at the base of the brain. Vessel rupture results in SUBARACHNOID HEMORRHAGE or INTRACRANIAL HEMORRHAGES. Giant aneurysms (>2.5 cm in diameter) may compress adjacent structures, including the OCULOMOTOR NERVE. (From Adams et al., Principles of Neurology, 6th ed, p841)

Bleeding into the intracranial or spinal SUBARACHNOID SPACE, most resulting from INTRACRANIAL ANEURYSM rupture. It can occur after traumatic injuries (SUBARACHNOID HEMORRHAGE, TRAUMATIC). Clinical features include HEADACHE; NAUSEA; VOMITING, nuchal rigidity, variable neurological deficits and reduced mental status.

Constriction of arteries in the SKULL due to sudden, sharp, and often persistent smooth muscle contraction in blood vessels. Intracranial vasospasm results in reduced vessel lumen caliber, restricted blood flow to the brain, and BRAIN ISCHEMIA that may lead to hypoxic-ischemic brain injury (HYPOXIA-ISCHEMIA, BRAIN).

Pathological outpouching or sac-like dilatation in the wall of any blood vessel (ARTERIES or VEINS) or the heart (HEART ANEURYSM). It indicates a thin and weakened area in the wall which may later rupture. Aneurysms are classified by location, etiology, or other characteristics.

The tearing or bursting of the weakened wall of the aneurysmal sac, usually heralded by sudden worsening pain. The great danger of a ruptured aneurysm is the large amount of blood spilling into the surrounding tissues and cavities, causing HEMORRHAGIC SHOCK.

Radiography of the vascular system of the brain after injection of a contrast medium.

A method of hemostasis utilizing various agents such as Gelfoam, silastic, metal, glass, or plastic pellets, autologous clot, fat, and muscle as emboli. It has been used in the treatment of spinal cord and INTRACRANIAL ARTERIOVENOUS MALFORMATIONS, renal arteriovenous fistulas, gastrointestinal bleeding, epistaxis, hypersplenism, certain highly vascular tumors, traumatic rupture of blood vessels, and control of operative hemorrhage.

A series of tests used to assess various functions of the eyes.

An independent state in eastern Africa. Ethiopia is located in the Horn of Africa and is bordered on the north and northeast by Eritrea, on the east by Djibouti and Somalia, on the south by Kenya, and on the west and southwest by Sudan. Its capital is Addis Ababa.

Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. Visual acuity depends on the functions of RETINA, neuronal transmission, and the interpretative ability of the brain. Normal visual acuity is expressed as 20/20 indicating that one can see at 20 feet what should normally be seen at that distance. Visual acuity can also be influenced by brightness, color, and contrast.

The total area or space visible in a person's peripheral vision with the eye looking straightforward.

Method of measuring and mapping the scope of vision, from central to peripheral of each eye.

Glaucoma in which the angle of the anterior chamber is open and the trabecular meshwork does not encroach on the base of the iris.

An ocular disease, occurring in many forms, having as its primary characteristics an unstable or a sustained increase in the intraocular pressure which the eye cannot withstand without damage to its structure or impairment of its function. The consequences of the increased pressure may be manifested in a variety of symptoms, depending upon type and severity, such as excavation of the optic disk, hardness of the eyeball, corneal anesthesia, reduced visual acuity, seeing of colored halos around lights, disturbed dark adaptation, visual field defects, and headaches. (Dictionary of Visual Science, 4th ed)

Rational sequence of tests for pancreatic function. (1/1867)

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)

Abnormal responses to rubella infection. (2/1867)

Two cases of rubella are described which caused initial problems in laboratory diagnosis due to abnormal features in the immune response. One patient presented with thrombocytopenic purpura and associated circulating immune complexes. The other patient, who was in early pregnancy, had an unusually prolonged rash and a delayed humoral immune response. The possible reasons for the difficulties in serological confirmation are discussed. (+info)

Intimal tear without hematoma: an important variant of aortic dissection that can elude current imaging techniques. (3/1867)

BACKGROUND: The modern imaging techniques of transesophageal echocardiography, CT, and MRI are reported to have up to 100% sensitivity in detecting the classic class of aortic dissection; however, anecdotal reports of patient deaths from a missed diagnosis of subtle classes of variants are increasingly being noted. METHODS AND RESULTS: In a series of 181 consecutive patients who had ascending or aortic arch repairs, 9 patients (5%) had subtle aortic dissection not diagnosed preoperatively. All preoperative studies in patients with missed aortic dissection were reviewed in detail. All 9 patients (2 with Marfan syndrome, 1 with Takayasu's disease) with undiagnosed aortic dissection had undergone >/=3 imaging techniques, with the finding of ascending aortic dilatation (4.7 to 9 cm) in all 9 and significant aortic valve regurgitation in 7. In 6 patients, an eccentric ascending aortic bulge was present but not diagnostic of aortic dissection on aortography. At operation, aortic dissection tears were limited in extent and involved the intima without extensive undermining of the intima or an intimal "flap." Eight had composite valve grafts inserted, and all survived. Of the larger series of 181 patients, 98% (179 of 181) were 30-day survivors. CONCLUSIONS: In patients with suspected aortic dissection not proven by modern noninvasive imaging techniques, further study should be performed, including multiple views of the ascending aorta by aortography. If patients have an ascending aneurysm, particularly if eccentric on aortography and associated with aortic valve regurgitation, an urgent surgical repair should be considered, with excellent results expected. (+info)

Comparison of standard and CA-125 response criteria in patients with epithelial ovarian cancer treated with platinum or paclitaxel. (4/1867)

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)

Recycling, channeling and heterogeneous protein turnover estimation using a model of whole-body protein turnover based on leucine kinetics in rodents. (5/1867)

In the companion paper, a whole-body, mechanistic model of protein turnover in a rodent was described and evaluated with independent data sets that used the flooding dose method. On the basis of fitted fluxes, the model was able to predict specific radioactivity changes in the protein and free leucine pools and whole-body protein fractional synthesis rate (FSR). In this paper, results of model simulations of specific radioactivity changes in the flooding dose, pulse dose and continuous infusion methods were compared and the influence of recycling, channeling and multiple protein pools on model behavior were analyzed. For all methods, the percentage of channeling must be estimated to determine whether the extracellular or intracellular pool specific radioactivities better approximate the aminoacyl tRNA pool specific radioactivity. Recycling also affects the specific radioactivity of the aminoacyl-tRNA pool and therefore must be estimated. An analysis of fits of the flooding dose data indicated that 100% channeling was occurring, but the percentage of recycling could not be determined. Multiple protein pools turning over at different rates overestimated FSR by 2-3% at early time points (5 min) and underestimated FSR by 3-6% at 60 min in the flooding dose method. For the pulse dose method, FSR was underestimated by 40-50% at 5 min and underestimated by 9-10% at 60 min. An increase in time to measure FSR caused a decrease in the estimate of FSR (18% over 3 h) for the flooding dose method and an increase in the estimate of FSR (144% over 3 h) for the pulse dose method. (+info)

HLA-B27 antigen in diagnosis of atypical seronegative inflammatory arthropathy. (6/1867)

Eighteen patients with an inflammatory pauciarticular peripheral arthropathy not typical of any known entity showed an asymmetrical pattern of disease, with a predilection for the lower extremities. Destructive joint changes and deformities were absent (mean follow-up 10 years). Although spondylitis and sacroiliitis were absent on x-rays, HLA-B27 antigen was found in 8 patients (44%). This antigen and similar joint symptoms are also found in other forms of arthritis. (+info)

Radioactive phosphorus uptake testing of choroidal lesions. A report of two false-negative tests. (7/1867)

Two false-negative results from 32P testing for histologically verified malignant melanomas of the choroid are reported. In the first case, a haemorrhagic choroidal detachment caused an increase in probe; additionally, the tumour was necrotic. Both factors are likely to have contributed to the false-negative result. A satisfactory explanation for the false-negative result in the second case was not determined, although it may have accurately reflected a period of minimal tumour activity, inasmuch as repeat 32P testing was strongly positive eight months later, when unequivocal evidence of tumour growth was present. An alternative explanation is that the orally administered 32P was incompletely absorbed. Since 32P testing is frequently accompanied by significant manipulation both in the manoeuvre associated with tumour localization and in that associated with the actual radioactive counting, it would seem desirable to perform indicated enucleation immediately after completion of the 32P testing. While the properly performed 32P test remains a valuable diagnostic test for helping to establish the presence or absence of malignancies of the posterior globe, it is important to guard against the tendency to underestimate careful clinical evaluation. (+info)

An approach to the problems of diagnosing and treating adult smear-negative pulmonary tuberculosis in high-HIV-prevalence settings in sub-Saharan Africa. (8/1867)

The overlap between the populations in sub-Saharan Africa infected with human immunodeficiency virus (HIV) and Mycobacterium tuberculosis has led to an upsurge in tuberculosis cases over the last 10 years. The relative increase in the proportion of notified sputum-smear-negative pulmonary tuberculosis (PTB) cases is greater than that of sputum-smear-positive PTB cases. This is a consequence of the following: the association between decreased host immunity and reduced sputum smear positivity; the difficulty in excluding other HIV-related diseases when making the diagnosis of smear-negative PTB; and an increase in false-negative sputum smears because of overstretched resources. This article examines problems in the diagnosis and treatment of smear-negative PTB in high-HIV-prevalence areas in sub-Saharan Africa. The main issues in diagnosis include: the criteria used to diagnose smear-negative PTB; the degree to which clinicians actually follow these criteria in practice; and the problem of how to exclude other respiratory diseases that can resemble, and be misdiagnosed as, smear-negative PTB. The most important aspect of the treatment of smear-negative PTB patients is abandoning 12-month "standard" treatment regimens in favour of short-course chemotherapy. Operational research is necessary to determine the most cost-effective approaches to the diagnosis and treatment of smear-negative PTB. Nevertheless, substantial improvement could be obtained by implementing the effective measures already available, such as improved adherence to diagnostic and treatment guidelines. (+info)

Agaricus placomyces and Agaricus xanthodermus produce false negative reactions. Sometimes referred to as "Schaeffer's reaction ... Three results are expected with the iron salts tests: no change indicates a negative reaction; a color change to olive, green ... A positive reaction of Schaeffer's test, which uses the reaction of aniline and nitric acid on the surface of the mushroom, is ... "The Meixner test in the detection of alpha-amanitin and false-positive reactions caused by psilocin and 5-substituted ...

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

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 ... A cherry red color indicates a positive result, while a yellow-brown color indicates a negative result. The test depends on the ... VP negative organisms include Citrobacter sp., Shigella, Yersinia, Edwardsiella, Salmonella, Vibrio furnissii, Vibrio fluvialis ...

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

Vitamin C can cause analytical false negatives due to its anti-oxidant properties inhibiting the color reaction. If the card ... This can cause false negative results in upper gastrointestinal bleeding sources, or in right colon adenomas and cancers that ... However, although heme breakdown is less than globin during intestinal transit, false negative results can be seen with the ... Wells HJ, Pagano JF (1977). "Hemoccult test - reversal of false-negative results due to storage". Gastroenterology. 72: 1148. ...

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

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

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

20 animals would typically be used to ensure against false negative results. The OECD Guidelines for the Testing of Chemicals ... and their allergic reaction, if any, measured. 15% of guinea pigs must show a reaction for the test to be considered positive. ... along with an adjuvant to enhance the immune reaction of the guinea pig. During Induction B, the topical induction, the test ...

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

If a minor reaction is considered doubtful, the OT test is less accurate and may fail to detect TB, producing a false negative ... Indications are usually classified as positive, negative, or doubtful. Because it is not possible to control precisely the ...

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

The inability to diagnose B. canis by SAT due to lack of cross-reaction is another drawback. False-negative SAT may be caused ... Due to the similarity of the O polysaccharide of Brucella to that of various other Gram-negative bacteria (e.g. Francisella ... by polymerase chain reaction". Croatian Medical Journal. 51 (4): 306-13. doi:10.3325/cmj.2010.51.306. PMC 2931435. PMID ... Brucellosis is a reproductive disease, so has an extreme negative impact on the population dynamics of a species. This becomes ...

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

... while the negative effect of stress causes more false alarms and mistakes when compared to a normal condition. The researchers ... In a study by Duncko et al., the positive effect of stress manifested itself as a decreased reaction time in participants, ... This negative effect on the retrieval of memories caused by stress can be attributed to cortisol, the stress hormone that is ... This is due to the fact that the negative cue is perceived as a factor in the induced stress, whereas the positive cue is not. ...

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

... but still results in some false negatives, for *0304 the typing efficiency is poor and cross-reaction with DQ8 is relatively ... Bunce M, Taylor CJ, Welsh KI (1993). "Rapid HLA-DQB typing by eight polymerase chain reaction amplifications with sequence- ...

https://en.wikipedia.org/wiki/HLA-DQ7

... give rise to false negative tests such as in the case of testing for the aldehydic terminus of glucose. Schiff's reagent on ... The further reaction of the Schiff reagent with aldehydes is complex with several research groups reporting multiple reaction ... Physical-chemical investigations of the color reaction of aldehydes, called the "Schiff reaction"), Annales de Chimie, 11th ... This reaction disrupts the otherwise favored delocalized extended pi-electron system and resonance in the parent molecule. ...

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

After heavy negative reactions on social media, the company withdrew the ad. NDTV reported that there was mob attack at Tanishq ... showroom in Kutch district however, it was rejected as false claim by Gujarat police. In a press release the company expressed ...

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

Critical reaction was mixed. Russell Edwards, writing for the film industry trade publication Variety, was negative, ... criticizing the film for its "glacial pace" and saying it was "too flimsy and false to truly engage." Lee Marshall, writing for ...

https://en.wikipedia.org/wiki/Ploy_(film)

A traditional skin-prick allergy test for allergy to meat may give a false-negative answer. Determination of specific IgE to ... After this reaction, the future intake of mammal meat with the same alpha-gal causes an allergic reaction. Symptoms of the ... A typical allergic reaction to alpha-gal has a delayed onset, occurring 3-8 hours after the consumption of mammalian meat ... In 70% of cases the reaction is accompanied by respiratory distress and as such is particularly harmful to those with asthma. ...

https://en.wikipedia.org/wiki/Alpha-gal_allergy

False-negative tuberculin tests are common in dogs. Radiographs and a thorough history are useful in diagnosis. Affected dogs ... However, cross-reaction between M. avium avium, M. tuberculosis, or M. avium paratuberculosis is a disadvantage. Dogs, cats, ...

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

Additionally these tests may show false-negative when the patient's antibody titer is very high due to a hook effect (also ... false-positive reactions can occur for a large number of reasons, the most common of which is other infections, both viral and ... This reaction is the foundation of "nontreponemal" assays such as the VDRL (Venereal Disease Research Laboratory) test and ... when a large number of untreated patients will be negative by these methods.[citation needed] With nontreponemal tests, ...

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

Although the installation struck a chord with the public, it received negative reactions from some critics in the press. A. A. ... "false nobility" and being a "prettified and toothless" memorial. Tom Piper said in response that "... it is a remarkably good ...

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

The speech generated an intense reaction, much of it negative. The "Chocolate City" metaphor was seized on and parodied by ... Surely he doesn't approve of us being in Iraq under false pretenses. But surely he is upset at black America also. We're not ...

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

... his reaction can only be negative."[158][159] ... "The concept of nonviolence is a false ideal. It presupposes the ... and the act of killing in that situation would have minimal negative karmic repercussions.[134] ... are five requisite factors that must all be fulfilled for an act to be both an act of killing and to be karmically negative. ...

https://en.m.wikipedia.org/wiki/Nonviolence

... can contribute to several negative outcomes including: Over-thinking the actions of others. Making negative ... The American reaction to a Russian SALT treaty during the Cold War is one well-known example of naïve cynicism in history. ... The propensity to believe that others are prone to committing the fundamental attribution error, false consensus effect or self ... Those negotiators high in communication skills also tend to view deadlocks as a negative event and will avoid reaching an ...

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

... can be combined and performed sequentially on the same cells in order to reduce assay-specific false positive or false negative ... This assay measures the reducing potential of the cell using a colorimetric reaction. Viable cells will reduce the MTS reagent ... Such ATP-based assays include bioluminescent assays in which ATP is the limiting reagent for the luciferase reaction. ...

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

... but false negatives have been a problem due to easy death of P. multocida, and serology cannot differentiate between current ... High leukocyte and neutrophil counts are typically observed, leading to an inflammatory reaction at the infection site ( ... Pasteurella multocida is a Gram-negative, nonmotile, penicillin-sensitive coccobacillus of the family Pasteurellaceae. Strains ... Gram-negative bacteria. As a result, amoxicillin-clavulanate (a beta-lactamase inhibitor/penicillin combination) is seen as the ...

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

As a reaction to this many private organizations have formed whistleblower legal defense funds or support groups to assist ... Those who report a false claim against the federal government, and suffer adverse employment actions as a result, may have up ... The ethical implications of whistleblowing can be negative as well as positive. However, sometimes employees may blow the ... The first US law adopted specifically to protect whistleblowers was the 1863 United States False Claims Act (revised in 1986), ...

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

If the reaction is negative, "check cells"-reagent cells coated with IgG-are added to ensure that the test is working correctly ... leading to false positive reactions in forward grouping. Cold agglutinins can usually be deactivated by warming the sample to ... Repeating the same for each reference cell row with negative reaction. Step 4: Discounting antigens that were absent in all or ... This antibody-antigen reaction can be detected through visible clumping or destruction of the red blood cells, or by reaction ...

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

False negative result[edit]. Reaction to the PPD or tuberculin test is suppressed by the following conditions: *Recent TB ... most positive reactions in low-risk individuals are false positives.[11] A false positive result may be caused by ... A false negative result may occur in a person who has been recently infected with TB, but whose immune system hasn't yet ... Another source of false positive results can be allergic reaction or hypersensitivity. Although rare, (about 0.08 reported ...

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

... and a false negative ratio ([100 x {number of individuals with a negative patch test}]/{number of individuals with a glu487lys ... suggest that the reactions are due to classical allergic reaction to allergens in the beverage; reactions to all or most types ... Questionnaires can be devised to determine the specific types of alcoholic beverages eliciting reactions; reactions evoked by ... alcohol-induced rhinitis and exacerbations of asthma reactions are highly associated with aspirin-induced asthma reactions; ...

https://en.wikipedia.org/wiki/Alcohol-induced_respiratory_reactions

The net reaction between an aldehyde (or an alpha-hydroxy-ketone) and the copper(II) ions in Benedict's solution may be written ... Other carbohydrates which produce a negative result include inositol. Benedict's reagent can also be used to test for the ... creates a false positive. As color of the obtained precipitate can be used to infer the quantity of sugar present in the ... With the citrate included, the reaction becomes: RCHO + 2 Cu(C 6H 5O 7)− + 5 OH− → RCOO− + Cu 2O + 2 C 6H 5O3− 7 + 3 H 2O. ...

https://en.wikipedia.org/wiki/Benedict's_reagent

This often resulted in a large amount of false positives and false negatives due to the non-specific nature of nucleotide ... Antigens can then bind to the antibodies, resulting in a few naturally occurring B-cell reactions. At the final step of these ... What sets CANARY apart from the other methods is that the system is quicker and has a lower number of false readings. Existing ... reactions, Ca2+ ions are released, and in the presence of aequorin, photons are emitted. Aequorin is a photoprotein that can be ...

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

... on the basis that the expected value is negative. Irrational thought was seen in Europe as part of the reaction against ... "false" statements or mere opinions based on emotion or sensorial experience. The German cultural historian Silvio Vietta has ... It can be seen as either a negative quality, used pejoratively, or a positive quality: For example, religious faith may ... Irrationality is not always viewed as a negative. Dada Surrealist art movements embraced irrationality as a means to "reject ...

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

A disadvantage of IHC is that it is not possible to identify false-negative and false-positive results. In CISH, if there is no ... and they both use enzyme reactions (HRP/AP) to measure amplification. CISH and IHC are different in that IHC measures protein ...

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

When assessing the technique, no false positives or negatives were found when looking for cffDNA to determine fetal sex in ... The use of nested polymerase chain reaction (nested PCR) was evaluated to determine sex by detecting a Y chromosome specific ... However, it might also indicate a failure of the analysis itself ( a false negative result). Paternal genetic polymorphisms and ... One study in the United States estimated a false positive rate of 0.3% and a positive predictive value of 80% when using cffDNA ...

https://en.wikipedia.org/wiki/Cell-free_fetal_DNA

Public reaction to the book was very strong. Many people were shocked at the extent of food contamination and drug side-effects ... For example, they claimed that bran (roughage) has many negative effects on the intestine,[4] which contradicts today's view ... authors claim that advertising for these drugs is deliberately misleading and uses a variety of dishonest techniques from false ... can potentially have serious negative health impacts that consumers are not made aware of. These impacts are felt by all ...

https://en.wikipedia.org/wiki/100,000,000_Guinea_Pigs

... negative results, etc. Even those with positive results can be better explained as resulting in false positives due to bias and ... Even low-risk medications such as antibiotics can have potential to cause life-threatening anaphylactic reactions in a very few ... Negative outcomes. See also: List of herbs with known adverse effects. Adequacy of regulation and CAM safety. Many of the ... Alternative medicine may lead to a false understanding of the body and of the process of science.[169][178] Steven Novella, a ...

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

not-guilty' when making judgments in courts, 'wrong/false' vs. 'right/true' when measuring truth value, and, on the other hand ... Stevens's reaction was not to conduct experiments to test for the presence of additive structure in sensations, but instead to ... Amounts (non-negative real numbers). *Balances (any real number). For example, percentages (a variation on fractions in the ... This conclusion was later rendered false by the discovery of the theory of conjoint measurement by Debreu (1960) and ...

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

My knee-jerk reaction was, "This topic is basically (integers in) quadratic number fields, which are extremely important." But ... I followed the model of square root of negative numbers. For comparison, Special:PrefixIndex/square roots has nothing of the ... As "not very different from" - false, they are algebraic numbers and "integers", after all. These facts are completely obscured ...

https://en.wikipedia.org/wiki/Wikipedia_talk:WikiProject_Mathematics

Hurwitz EL, Morgenstern H, Vassilaki M, Chiang LM (July 2005). "Frequency and clinical predictors of adverse reactions to ... which has led to negative impacts on both public vaccination and mainstream acceptance of chiropractic.[27] The American ... claims which are demonstrably false. The main chiropractic treatment technique involves manual therapy, especially spinal ... adverse reactions appear to be more common following manipulation than mobilization.[139] The most frequently stated adverse ...

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

Opposition leader reaction was swift and scathing, calling his words racist and divisive.[11] ... "the ads they ran were racially-charged false attacks".[41] ...

https://en.wikipedia.org/wiki/Dog-whistle_politics

Job satisfaction is also related to negative health outcomes.[120][121] A literature review[122] and meta-analysis[123] of high ... Fredrikson M., Sundin O., & Frankenhaeuser M. (1985). Cortisol excretion during the defence reaction in humans. Psychosomatic ... Examples of workplace incivility include insulting comments, denigration of the target's work, spreading false rumors, social ... Fredikson, Sundin, and Frankenhaeuser (1985) found that reactions to psychological stressors include increased activity in the ...

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

... or Lattice Enabled Nuclear Reactions; one of the reasons being to avoid the negative connotations associated with "cold fusion ... Rousseau, D. L. (January-February 1992), "Case Studies in Pathological Science: How the Loss of Objectivity Led to False ... Chemically Assisted Nuclear Reactions (CANR),[79] Lattice Assisted Nuclear Reactions (LANR), Condensed Matter Nuclear Science ( ... Huizenga 1993, p. viii "Enhancing the probability of a nuclear reaction by 50 orders of magnitude (...) via the chemical ...

https://en.m.wikipedia.org/wiki/Cold_fusion

Using T, F for "true" and "false" and ? for undecided, there are exactly nine positions regarding determinism/free will that ... The authors concluded, in their paper, that it is belief in determinism that causes those negative effects.[206] This may not ... Conversely, determinism is the belief that everything operates under cause and effect; every action determines a reaction. ... The notion that all propositions, whether about the past, present or future, are either true or false. The problem of free will ...

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

Allergic reactions to ginger generally result in a rash.[2] Although generally recognized as safe, ginger can cause heartburn ... If consumed in reasonable quantities, ginger has few negative side effects.[38] It is on the FDA's "generally recognized as ... false stems made of the rolled bases of leaves) about one meter tall bearing narrow leaf blades. The inflorescences bear ...

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

Reactions. Condolences flooded in from across the world, led by the Queen. Other messages came from Pope John Paul II, US ... The false allegations on the front page of The Sun on 19 April 1989 ... Of those statements, 116 were amended to remove or change negative comments about South Yorkshire Police. South Yorkshire ... The extreme reaction to Mr Bigley's murder is fed by the fact that he was a Liverpudlian. Liverpool is a handsome city with a ...

https://en.m.wikipedia.org/wiki/Hillsborough_disaster

In practice they confuse and mix it with P. macroceras ("false yohimbe"), a species that contains little yohimbine.[48] ... Blockage of these brain adrenoreceptors appears to reverse a central negative feedback mechanism that regulates penile erection ... yohimbine via an enantioselective organocatalytic Pictet-Spengler reaction". The Journal of Organic Chemistry. 76 (21): 8907-12 ...

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

Negative symptoms. Negative symptoms are thoughts, behaviors or emotions normally present in a healthy person that a person ... Check for reactions to traumatic experiences. *Decide together with a doctor about using medication, taking into account the ... The therapist may design a behavioral experiment for paranoia (false beliefs of danger) that will help the person to find out ... The sign for minus is -; it is also the sign for the word "negative". Negative symptoms includes a 'flat affect'; having a ...

https://simple.wikipedia.org/wiki/Schizophrenic

A third of the respondents believed disclosing their sexual history would result in a negative reaction, and 30% had received a ... The Caliphal court in Baghdad featured women who dressed as men, including false facial hair, but they competed with other ... Nicholas, and a collection called Smith College Stories, without negative views.[78] Enduring loyalty, devotion, and love were ... negative reaction from a medical professional after identifying themselves as lesbian or bisexual.[197] A patient's complete ...

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

Mosaicism and chimerism, rare genetic conditions that can result in false negative results on DNA-based tests ... The current techniques for paternity testing are using polymerase chain reaction (PCR) and restriction fragment length ... which can result in a false negative result if their reproductive tissue has a different genetic make-up from the tissue ...

https://en.m.wikipedia.org/wiki/Paternity_test

This may cause false positive reactions but an individual suffering from anxiety may also avoid real threats. This may explain ... Negative experiences have been illustrated in producing not only negative expectations, but also avoidant, or antagonistic, ... The fear of failing at a task and being negatively evaluated for failure can have a similarly negative effect on the adult.[29] ... Because test anxiety hinges on fear of negative evaluation,[25] debate exists as to whether test anxiety is itself a unique ...

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

He received the Nobel Prize in Chemistry in 1909 for his work on catalysis, chemical equilibria and reaction velocities. He, ... "Dr Perutz, said: "It is one thing for scientists to oppose creationism which is demonstrably false but quite another to make ... He argued the negative, although his formal position was agnostic, awaiting proof... 'You're so smart, why do you believe in ... Francis Perrin (1901-1992): French physicist, co-establisher of the possibility of nuclear chain reactions and nuclear energy ...

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

... three people had a false negative diagnosis of MG, which can mimic ALS and other neurological disorders, leading to a delay in ... "Ice Bucket Challenge: Lady Gaga, Justin Bieber, G-Dragon and Oprah - the most entertaining reactions so far".. ... Mitsumoto H, Brooks BR, Silani V (November 2014). "Clinical trials in amyotrophic lateral sclerosis: why so many negative ... "Avoiding false positive diagnoses of motor neuron disease: lessons from the Scottish Motor Neuron Disease Register". Journal ...

https://en.wikipedia.org/wiki/Lou_Gehrig's_disease

The reaction of acid with carbonates, most commonly found as the polymorph calcite and aragonite (CaCO3), relates to the ... Most varieties of pyroxene consist of permutations of Ca2+, Fe2+ and Mg2+ to balance the negative charge on the backbone. ... Parting, sometimes called "false cleavage", is similar in appearance to cleavage but is instead produced by structural defects ... In other silicate structures, different combinations of elements are required to balance out the resultant negative charge. It ...

https://en.m.wikipedia.org/wiki/Mineral

The false-negative rate of cancer exome sequencing is low-i.e.: the majority of neoantigens occur within exonic sequence with ... Allergen - A substance capable of causing an allergic reaction. The (detrimental) reaction may result after exposure via ... As of 2015 mass spectrometry resolution is insufficient to exclude many false positives from the pool of peptides that may be ... negative selection). Endogenous antigens include xenogenic (heterologous), autologous and idiotypic or allogenic (homologous) ...

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

Photophobia (biology) - a negative phototaxis or phototropism response, or a tendency to stay out of the light ...

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

David Gorski and geneticist Adam Rutherford advised caution against proliferation of false and pseudoscientific conclusions by ... The original researchers pointed out negative results in the paper's appendix that the criticism omitted in its calculations, ... Norms of reaction. *Gene-environment interaction. *Gene-environment correlation. *Operon. *Heritability. *Quantitative genetics ...

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

The enzyme reaction will produce a change in colour of the solution that is proportional to the amount of antibody bound to the ... or their ANA converted from positive to negative from steroids, cytotoxic medications, or uremia (kidney failure)."[9] ... "Persistent use of "false" cell lines". Int. J. Cancer. 122 (1): 1-4. doi:10.1002/ijc.23233. PMID 17960586. S2CID 27432788 ... "Only a small percentage have a negative ANA, and many of those have other antibodies (such as anti-phospholipid antibodies, ...

https://en.wikipedia.org/wiki/Anti-nuclear_antibody

Sensitivity of humans varies from extreme allergic reaction to no reaction at all (about 20%). The bite usually produces a ... Proximity of infested dwellings or items, if easy routes are available for travel, e.g. through ducts or false ceilings; ... Resistance to pesticides has increased significantly over time and there are concerns of negative health effects from their ... Symptoms may not appear until some days after the bites have occurred.[5] Reactions often become more brisk after multiple ...

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

Gross stress reaction is defined as a "normal personality [utilizing] established patterns of reaction to deal with ... negative reminders of the trauma.[214][215] Additional research has been performed to understand the social consequences of the ... False pregnancy. *Intermittent explosive disorder. *Klüver-Bucy syndrome. *Psychogenic non-epileptic seizures ... Posttraumatic stress reactions have not been studied as well in children and adolescents as adults.[10] The rate of PTSD may be ...

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

Secondly, it is a way for the campaign to test a variety of messages, both positive and negative, on themselves and their ... Social media today is a popular medium for the candidates to campaign and for gauging the public reaction to the campaigns. ... Recently, concerning the 2016 U.S. presidential election, a major concern has been that of the effect of false stories ... such as positive or negative wording), the adequacy of the number being established quantitatively with psychometric measures ...

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

In a reaction to Plan S, Highwire suggested that three of their society publishers make all author manuscripts freely available ... Empirical evidence shows that the misuse of the JIF - and journal ranking metrics in general - has a number of negative ... a claim that the reporters found to be false by examining the database used for the research. Furthermore, The Times noted that ... This under-representation of applied research in Africa, Asia, and South America may have an additional negative effect on ...

https://en.m.wikipedia.org/wiki/Open_access_journal

In their study, they found that both positive and negative human emotions are felt more intensely in bright light. Professor Xu ... Light pollution is a growing problem in reaction to excess light being given off by numerous signs, houses, and buildings. ... received fewer negative evaluative comments in nurses' notes, and took fewer potent analegesics than 23 matched patients in ...

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

Diseth, T. (2005). "Dissociation in children and adolescents as reaction to trauma - an overview of conceptual issues and ... false First, M. B., Kay, J., Lieberman, J. A., Riba, M. B., Tasman, A., eds. Psychiatry. 4th ed. Chichester, UK: John Wiley & ... talk therapy to identify unhealthy and negative beliefs/behaviors); and medications (antidepressants, anti-anxiety medications ... diagnosis of dissociative disorders is the possibility that the patient may be feigning symptoms in order to escape negative ...

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

"False Tenets of Paraherbalism". Quackwatch. Retrieved 2016-10-29.. *^ a b c d e Barrett, Stephen (23 November 2013). "The ... or lack of understanding of plant and drug interactions have led to adverse reactions that are sometimes life threatening or ... often negative results, and the studies were of low quality.[18] ... It relies on the false belief that preserving the complexity of ... Unethical practices by some herbalists and manufacturers, which may include false advertising about health benefits on product ...

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

It can result in knee-jerk reactions and a severe backlash by users. Hence, lawyers in the Timeshare industry have to be very ... US Consumerattorneys False Negative Reviews We have helped hundreds of clients across the country with their timeshare ... Lawyers will obviously get tensed when they notice many negative reviews online. However, usconsumerattorneys negative reviews ... Sometimes, a negative review can crop up when a client has unreasonable expectations. At other times, clients can be nasty and ...

http://usconsumerattorney.blogspot.in/2017/04/

... then the responses and reactions are different. This is the reason why usconsumerattorneys Negative Reviews are still popular, ... US Consumerattorneys False Negative Reviews We have helped hundreds of clients across the country with their timeshare ... Some client Usconsumerattorneys negative reviews are as follows:. *Usconsumerattorney did not take their case seriously owing ... In addition, most Usconsumerattorneys negative are not backed by pieces of evidence to validate and verify it. ...

http://usconsumerattorney.blogspot.in/2017/05/

About false negative results when certain subtypes of HIV-1 are present in the patient: Although it has high specificity, this ... The polymerase chain reaction (PCR) is a method of amplifying a sample of DNA exponentially.. Can be used for:. 1. Detection of ... 2. It can give false negative results when certain subtypes of HIV-1 are present in the patient. **Read more below.. When do we ... This can occur when certain subtypes of HIV-1 are present in the patient, causing false negative results. This is apparent in a ...

https://www.medicowesome.com/2018/03/pcr-tests-for-hiv.html

The negative reaction from patients, doctors, insurers, and politicians was a result of KV trying to recoup those costs very ... But if proven false, or even mostly false, I would expect a sharp rebound.. You can watch the drama play out by adding the ... Rolling the dice on whats become a binary situation: Allegations of fraud have been made, which will either be true or false. ...

https://www.fool.com/investing/general/2011/04/05/3-stocks-stopping-the-presses.aspx

Dr Coffins response I asked him to explain his negative reaction to the offering of an XMRV test by Cooperative Diagnostics ... Should I expect false negative or false positive results? We have run over 400 samples without any false positives, giving us a ... I asked him to explain his negative reaction to the offering of an XMRV test by Cooperative Diagnostics and whether he doesnt ... 1. They do not say what the test is, nor provide any information to evaluate its accuracy, false positive, or false negative ...

http://forums.phoenixrising.me/index.php?threads/xmrv-test-by-cooperative-diagnostics.655/page-3

False-negative RDT results and implications of new reports of P. falciparum histidine-rich protein 2/3 gene deletions ... "False Negative Reactions". 0-9. A. B. C. D. E. F. G. H. I. J. K. L. M. N. O. P. Q. R. S. T. U. V. W. X. Y. Z. * 0-9 ...

https://extranet.who.int/iris/restricted/browse?authority=False+Negative+Reactions&type=mesh

... 0-9. A. B. C. D. E. F. G. H. I. J. K. L. M. N. O. P. Q. R. S. T. U ...

https://extranet.who.int/iris/restricted/handle/10665/26724/browse?authority=False+Negative+Reactions&type=mesh

false-negative reaction answers are found in the Tabers Medical Dictionary powered by Unbound Medicine. Available for iPhone, ... reaction. False-negative Reaction [Internet]. In: Venes DD, editors. Tabers Medical Dictionary. F.A. Davis Company; 2021. [ ... reaction. Accessed February 26, 2021.. False-negative reaction. (2021). In Venes, D. (Ed.), Tabers Medical Dictionary (24th ... false-negative reaction is a topic covered in the Tabers Medical Dictionary. To view the entire topic, please log in or ...

https://www.tabers.com/tabersonline/view/Tabers-Dictionary/730121/all/false_negative_reaction

What is false-negative reaction? Meaning of false-negative reaction medical term. What does false-negative reaction mean? ... Looking for online definition of false-negative reaction in the Medical Dictionary? false-negative reaction explanation free. ... medical-dictionary.thefreedictionary.com/false-negative+reaction,false-negative reaction,/a,. *Facebook ... false-negative reaction. false-·neg·a·tive re·ac·tion. an erroneous or mistakenly negative response. ...

https://medical-dictionary.thefreedictionary.com/false-negative+reaction

"False Negative Reactions" by people in this website by year, and whether "False Negative Reactions" was a major or minor topic ... "False Negative Reactions" by people in Profiles.. * Lantos JD. The False-negative Phenotype. Pediatrics. 2019 01; 143(Suppl 1): ... "False Negative Reactions" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical ... False Negative Reactions*False Negative Reactions. *False Negative Reaction. *Reaction, False Negative ...

https://researchers.childrensmercy.org/display/7687

False-Negative Reactions. Not all infected persons will have a delayed hypersensitivity reaction to a tuberculin test. ... False Positive Reactions. False positive tuberculin reactions can occur in individuals who have been infected with other ... Negative Reactions. An individual who does not show a positive reaction to 5 TU on the first test, but is suspected of being TB ... Impaired or attenuated cell mediated immunity (CMI) can potentially cause a false negative tuberculin reaction. Many factors ...

https://www.drugs.com/dosage/tubersol.html

False positive or false negative tuberculin skin test reactions may occur in some individuals. (See Interpretation of the Test ... False-Negative Reactions. Not all infected persons will have a delayed hypersensitivity reaction to a tuberculin test. ... False Positive Reactions. False positive tuberculin reactions can occur in individuals who have been infected with other ... Negative Reactions. An individual who does not show a positive reaction to 5 TU on the first test, but is suspected of being TB ...

https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=261efc52-a105-4c2c-a8ce-9eee20b62efc

False Negative Reactions * Female * Follow-Up Studies * Humans * Lung Neoplasms / diagnostic imaging* ...

https://pubmed.ncbi.nlm.nih.gov/11139308/?dopt=Abstract

False Negative Reactions * False Positive Reactions * Female * Humans * Male * Middle Aged * Radiopharmaceuticals ...

https://pubmed.ncbi.nlm.nih.gov/10451861/?dopt=Abstract

False Negative Reactions [‎3]‎. * * Browsing by Subject * IRIS Home * Browsing by Subject ...

https://apps.who.int/iris/browse?rpp=20&sort_by=-1&type=mesh&etal=-1&starts_with=F&order=ASC

... and were considered false negatives based on the CITT. The maintenance of these false-negative animals in herds has serious ... False-negative reactions to the comparative intradermal tuberculin test for bovine tuberculosis / Reações falso-negativas ao ... False Negative Reactions / Mycobacterium bovis / Neck Clinical aspect: Diagnosis Limits: Animals Language: English Journal: ... False-negative reactions to the comparative intradermal tuberculin test for bovine tubercu ...

https://search.bvsalud.org/gim/resource/en/biblio-895400

Agaricus placomyces and Agaricus xanthodermus produce false negative reactions. Sometimes referred to as "Schaeffers reaction ... Three results are expected with the iron salts tests: no change indicates a negative reaction; a color change to olive, green ... A positive reaction of Schaeffers test, which uses the reaction of aniline and nitric acid on the surface of the mushroom, is ... "The Meixner test in the detection of alpha-amanitin and false-positive reactions caused by psilocin and 5-substituted ...

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

False-Negative Results of Real-Time Reverse-Transcriptase Polymerase Chain Reaction for Severe Acute Respiratory Syndrome ... yet several recent studies have reported false-negative results of real-time reverse-transcriptase polymerase chain reaction ( ... False-negative results; COVID-19; Computed tomography; Laboratory examination; SARS-COV-2; rRT-PCR ... rRT-PCR). Here, we report two representative false-negative cases and discuss the supplementary role of clinical data with rRT- ...

https://phgkb.cdc.gov/PHGKB/phgHome.action?action=forward&dbsource=cov&id=4119

False-Negative Reactions False-negative tuberculin skin-test reactions have many potential causes (1). Nonresponsiveness to ... False-Positive Reactions A small percentage of tuberculin reactions may be caused by errors in administering the test or in ... If the second result is negative, the person is probably uninfected, and a positive reaction to subsequent tests indicates a ... the reactions in low-risk children are often false-positive. School-based screening for TB infection among children was started ...

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

False Negative Reactions. Humans. Latex Fixation Tests*. Male. Rheumatoid Factor / blood*. von Willebrand Diseases / blood, ...

http://www.biomedsearch.com/nih/Possibility-potential-VWD-misdiagnosis-misclassification/11426494.html

... and initial false-negative angiograms are reported. In both cases, the initial angiogram was of adequate technical quality and ... False Negative Reactions. Female. Humans. Intracranial Thrombosis / radiography*. Reproducibility of Results. Subarachnoid ... The cases of 2 children with true aneurysmal subarachnoid hemorrhages (SAHs) and initial false-negative angiograms are reported ... transient aneurysm sac thrombosis was the most likely explanation for the initial false-negative studies. It is particularly ...

http://www.biomedsearch.com/nih/Thrombosis-subsequent-recanalization-ruptured-intracranial/20367338.html

False Negative Reactions. Negative test results in subjects who possess the attribute for which the test is conducted. The ... False Positive Reactions. Positive test results in subjects who do not possess the attribute for which the test is conducted. ... Carbapenemase-producing organisms (CPOs) are Gram-negative bacteria that are typically resistant to most or all antibiotics and ... and transfusion reactions). The indirect test is applied to serum to detect the presence of antibody (e.g., in detection of ...

https://www.bioportfolio.com/resources/pmarticle/2640572/Amsler-grid-test-for-detection-of-advanced-glaucoma-in-Ethiopia.html

No immune system reaction? False negative result in someone who actually has Lyme. You say, about 10 years ago, my sister ... Suppressed immune system can mean a false negative test, because the test is measuring the reaction of your immune system. That ... Virginia doctors are required to disclose to patients that false negatives are common in Lyme testing. It also states that 25% ... www.nbcwashington.com/news/local/Virginia-to-Require-Doctors-to-Inform-Patients-About-Lyme-Disease-False-Negatives-199448441. ...

https://www.medhelp.org/posts/Lyme-Disease/Getting-tested-againsigh/show/2437240

False negative DNA polymerase chain reaction in an infant with subtype C human immunodeficiency virus type 1 infection. Kline, ...

https://journals.lww.com/pidj/toc/2002/09000

False positive and negative reactions may occur 14 Myasthenia gravis auto-immune destruction of acetylcholine receptors at ...

https://www.brainscape.com/flashcards/immune-mediated-disease-in-clinical-pract-2177809/packs/2846944

... increases the risk of a systemic reaction from the skin-test dose. A 10% rate of false negative skin test reactions has been ... A negative allergic history and absence of reaction to a properly applied skin test do not rule out the possibility of an ... Also, a negative skin test has no bearing on whether or not delayed serum reactions (serum sickness) will occur after ... In skin-test-negative patients, Antivenin caused a true immediate sensitivity reaction in less than 1 percent of patients.10 ...

https://www.rxlist.com/rattlesnake-antivenin-drug.htm

Includes: pharmacology, pharmacokinetics, contraindications, interactions, adverse reactions and more. ... False-negative reaction using glucose-oxidase tests for glucosuria; false-positive urine ketones; false diagnosis for ... Educate patient about signs of a significant reaction (eg, wheezing; chest tightness; fever; itching; bad cough; blue skin ... Of particular concern is the development of hypertensive reactions when levodopa is used with nonselective MAOI. Management: ...

https://www.drugs.com/ppa/levodopa-carbidopa-and-entacapone.html

... so false-positive reactions or false-negative reactions can occur with tuberculin tests. But both IGRAs use more specific M.Tb ... and/or is positive for polymerase chain reaction for M.Tb. However false-negative reactions can occur with these tuberculin ... Among the 54 cases with spontaneous nystagmus, the average length of hospitalization was shorter in patients with negative head ...

https://www.jstage.jst.go.jp/browse/otoljpn/25/3/_contents/-char/en

People can have false negative reactions to the skin testing. Where you off all antihistamines for a least a week prior to ... Sorry to hear you had to experience an anaphylactic reaction. They are truly scary. Its not too common to be negative to both ... My RAST tests are negative, however a couple of my skin tests have been both positive and negative. I know there are a few ... With the last reaction I passed out on the way to the hospital. WIth an attack I always get it 2 hours after eating and get ...

https://www.healingwell.com/community/default.aspx?f=7&m=1199261

Drug-diagnostic tests. Allergy skin tests: false-negative reactions. Drug-behaviors. Alcohol use: additive CNS depression ... adverse effects Among the more serious adverse reactions are skin rash, hypersensitivity reactions, and tachycardia. Drowsiness ... Allergy symptoms; management of anaphylaxis and transfusion reactions. Adults: 4 mg q 4 to 6 hours P.O. or 8 to 12 mg P.O. of ... Adverse reactions. CNS: dizziness, drowsiness, excitation (in children), sedation, poor coordination, fatigue, confusion, ...

https://medical-dictionary.thefreedictionary.com/Calimol

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

https://phil.cdc.gov/AdvancedSearchResults.aspx?Search=False+Negative+Reactions&parentid=8243&catid=10397

These results are similar to those found for false negative reactions against HF. The heterogeneity and thus the limited value ... In addition, reasons for the presence of false negative results are similar to those found when the HF is used as antigenic ... Se reported in these studies varied from 64.8% to 100%. Reasons for false negative results depend on several factors comprising ... was attributed to false negative results due to patients with Echinococcus genotypes other than G1. Nevertheless, additional ...

https://www.hindawi.com/journals/bmri/2015/428205/

Sometimes false-positive and negative reactions are observed in conditions of existing dermatitis. Some patch test substances, ... T. Fischer and I. Rystedt, "False-positive, follicular and irritant patch test reactions to metal salts," Contact Dermatitis, ... Systemic reactions, such as hand dermatitis or generalized eczematous reactions, can occur due to dietary nickel or cobalt ... Systemic reactions, such as generalized eczematous reactions or dyshidrotic hand eczema, can occur due to dietary ingestion of ...

https://www.hindawi.com/journals/drp/2012/749561/

... "false-negative reaction" is presented. False-negative reaction refers to a test result that is negative in an individual who ... false negative. Peters, Michael // BMA A-Z Family Medical Encyclopedia;2004, p297 A definition of the term "false negative" is ... A definition of the medical term "false-negative ratio" is presented. False-negative ratio refers to the ratio of subjects ... A definition of the medical term "false-positive reaction" is presented. False-positive reaction refers to a test result that ...

http://connection.ebscohost.com/c/reference-entries/21228048/false-negative-ratio

The polymerase chain reaction (PCR) is a method of amplifying a sample of DNA exponentially. (medicowesome.com)

2. It may give false-positive results. (medicowesome.com)

2. It can give false negative results when certain subtypes of HIV-1 are present in the patient. (medicowesome.com)
HIV-1 proviral DNA PCR test where taken approximately 20 days and 26 days after infection and repeatedly gave negative results. (medicowesome.com)

The negative reaction from patients, doctors, insurers, and politicians was a result of KV trying to recoup those costs very quickly. (fool.com)

Given her poor performance during confirmation hearings , her lack of experience, and her history of supporting attempts to dismantle traditional public education, Americans had visceral, negative reaction to DeVos. (longreads.com)

False-Negative Results of Real-Time Reverse-Transcriptase Polymerase Chain Reaction for Severe Acute Respiratory Syndrome Coronavirus 2: Role of De. (cdc.gov)
False-Negative Results of Real-Time Reverse-Transcriptase Polymerase Chain Reaction for Severe Acute Respiratory Syndrome Coronavirus 2: Role of Deep-Learning-Based CT Diagnosis and Insights from Two Cases. (cdc.gov)
The nucleic acid test or genetic sequencing serves as the gold standard method for confirmation of infection, yet several recent studies have reported false-negative results of real-time reverse-transcriptase polymerase chain reaction (rRT-PCR). (cdc.gov)
Eligibility criteria and data analysis Eligible studies measured sensitivity or specificity, or both of a covid-19 serological test compared with a reference standard of viral culture or reverse transcriptase polymerase chain reaction. (bmj.com)
Polymerase chain reaction-based identification and genotyping of Anopheles mosquitoes with a 96-pin bacterial replicator. (ajtmh.org)
A simple method for rapid identification of large numbers of Anopheles mosquitoes was developed based on polymerase chain reaction (PCR) amplification of the rDNA intergenic spacer and internal transcribed spacer 2. (ajtmh.org)
For the 151 samples with HIV-1 RNA ≥400 copies/mL for both assays, a good linear correlation was found (r = 0.81, P Abbott assay performed well in our setting, offering an alternative methodology for HIV-1 VL for laboratories with realtime polymerase chain reaction (PCR) capacity. (worldwidescience.org)
Syphilis can be detected by polymerase chain reaction (PCR), but clinical diagnostic PCR assays cleared by the U.S. Food and Drug Administration (FDA) are not yet available. (arupconsult.com)
Complementary polymerase chain reaction (PCR) primers based upon unique sequences in the internal transcribed spacer (ITS) regions of the nuclear ribosomal DNA (nrDNA) of small broomrape were developed. (plantmanagementnetwork.org)
Polymerase chain reaction (PCR) tests detect the genetic material of the virus that causes COVID-19. (medlineplus.gov)
The present-day extensive use of enzyme immunoassays and molecular methods (e.g., polymerase chain reaction) for diagnosis and characterization of animal pathogens has its origins in the use of isotope-labeled antigens and antibodies. (springer.com)

Characteristically, delayed hypersensitivity reactions to tuberculin begin at 5 to 6 hours, are maximal at 48 to 72 hours and subside over a period of days. (nih.gov)
Clinically, a delayed hypersensitivity reaction to tuberculin is a manifestation of previous infection with M tuberculosis or a variety of non-tuberculosis bacteria. (nih.gov)
indications It is prescribed in the treatment of a variety of hypersensitivity reactions, including rhinitis, skin rash, and pruritus. (thefreedictionary.com)

The sensitivity, specificity, positive predictive value and negative predictive value of Abbott to detect HIV-1 RNA ≥400 copies/mL were 91.8%, 100%, 100% and 92.2%, respectively. (worldwidescience.org)
The included articles were required to report sensitivity, specificity, and positive and negative predictive values, or to provide sufficient data for the construction of a 2x2 contingency table. (york.ac.uk)
The sensitivity, specificity, and positive and negative predictive values were calculated from each study using the method of Sackett et al. (york.ac.uk)
SPTs and RASTs exhibited high levels of sensitivity, specificity, positive predictive values (PPVs), negative predictive values (NPVs), and overall efficiency. (peanutallergy.com)
Even when there is clear evidence that the reaction is allergic in nature, ascertaining the clinical relevance of the patch test requires knowledge of technical aspects relating to specificity and sensitivity issues. (cosmeticsandtoiletries.com)

The positive and negative predictive values were 73% and 98% respectively. (nih.gov)

Many clinicians confirm the absence of HIV-1 infection with a negative HIV-1 antibody assay result at 12 to 18 months of age. (aappublications.org)
A negative enzyme-linked immunosorbent assay for anti-total histone antibodies excluded a false-positive reaction. (nih.gov)
The decreased PPV may either be due to false positive CAP/CTM results, or increased sensitivity compared to the Amplicor assay. (worldwidescience.org)
R46064 gave false-negative test results because the isolate had a Sabin3 vaccine sequence in the regions corresponding to the probe and primers of the VDPV assay ( Technical Appendix Figure 2). (cdc.gov)

Contamination with HIV antibody may be responsible for false positive results in specimens tested on automated platforms running HIV 4th generation assays in a region of high HIV prevalence. (nih.gov)
Such assays cannot be applied on clinical samples, which often contain both coagulase-negative staphylococci (CoNS) and S. aureus , either of which can carry mecA . (biomedcentral.com)
The results indicate that high prevalence of false-positive and false-negative reactions occurs in such assays. (biomedcentral.com)

Negative test results in subjects who possess the attribute for which the test is conducted. (childrensmercy.org)
Among the 53 animals analyzed using the CITT, 32 (60.4%) were negative, 14 (26.4%) were positive and seven (13.2%) results were inconclusive. (bvsalud.org)
A total of 24/32 (75.0%) of the animals with negative CITT results were culture positive (confirmed by PCR ) and were considered false negatives based on the CITT. (bvsalud.org)
Here, we report two representative false-negative cases and discuss the supplementary role of clinical data with rRT-PCR, including laboratory examination results and computed tomography features. (cdc.gov)
In this respect, crude antigens are used to detect specific antibodies in patients, giving rise to false positive results. (hindawi.com)
False-negative ratio refers to the ratio of subjects affected by an illness whose test results wrongly suggest they are disease free to all those subjects who have the disease. (ebscohost.com)
False FIT results common with small, nonpolypoid colorectal adenomas, early cancer. (ebscohost.com)
The article presents the study conducted in Taiwan as of August 2013, which showed that patients with early-stage colorectal cancer and those with small or nonpolypoid adenomas have higher possibility of receiving false-negative results from fecal immunochemical testing. (ebscohost.com)
False-negative results of Hemoccult test in colorectal cancer. (ebscohost.com)
Guaiac-based tests for occult blood in stool suffer from a number of drawbacks, leading to a reduction in their sensitivity as well as production of false-positive results. (labcorp.com)
Alternatively, presumptive exclusion of HIV-1 infection can be based on 1 positive HIV-1 virologic test with at least 2 subsequent negative virologic test results (at least 1 of which is performed at ≥8 weeks of age) or negative HIV-1 antibody test results (at least 1 of which is performed at ≥6 months of age). (aappublications.org)
Definitive exclusion of HIV-1 infection is based on 2 negative virologic test results, 1 obtained at ≥1 month of age and 1 obtained at ≥4 months of age, or 2 negative HIV-1 antibody test results from separate specimens obtained at ≥6 months of age. (aappublications.org)
Results were generally positive, although some false-negative findings were observed. (ajtmh.org)
Upon re-testing those with sufficient material available by CAP/CTM, all showed negative results. (worldwidescience.org)
Criteria were formulated for defining presumed false-positive results. (worldwidescience.org)
Inaccurate pipetting could lead to test-reaction failure or, even worse, false negative or false positive test results. (environmental-expert.com)
An internal amplification control was included in the reaction mixture to exclude false-negative results caused by specimen inhibitors or extraction failure. (cdc.gov)
Testing the finished products often results in false-negative reactions, and consequently the allergen (suggested concentration 0.05% in petrolatum) should preferably be tested separately. (unboundmedicine.com)
The Study One-hundred twenty patients were challenged with a cat exposure model after first evaluating by history, skin prick tests (SPTs), intradermal skin tests (IDSTs) if SPT results were negative, and in vitro allergy testing using Pharmacia & Upjohn technology. (peanutallergy.com)
False positive results of TFE3 protein were observed in three tumors. (physiciansweekly.com)
Two applications of the chromogenic cephalosporin test, using uninduced strains and strains grown on blood agar plates, gave a large number of false negative and false positive results. (lu.se)
Prozone means false-negative or false-low results in antigen-antibody reactions, due to an excess of either antigen or antibody. (biomedcentral.com)
Negative and faint HRP-2 lines accounted for four (3.8%) and 15 (14.4%) of the 104 prozone results in two RDT brands. (biomedcentral.com)
However, false-negative results have been reported also at high parasite densities. (biomedcentral.com)
False-positive reactions can also arise from phenomena such as the Excited Skin Syndrome in which positive test results from numerous patches cannot be reproduced when the patient is later retested. (cosmeticsandtoiletries.com)

Allergy to any component of TUBERSOL or an anaphylactic or other allergic reaction to a previous test of tuberculin PPD is a contraindication to the use of TUBERSOL. (nih.gov)
Hey T, Sorry to hear you had to experience an anaphylactic reaction. (healingwell.com)
They pricked my skin with approx 3/4 of the allergens, NOT including known problems for me (I can just touch something that has had a seafood product on it, and I'll have an immediate and severe anaphylactic reaction! (healingwell.com)
She gave me 4 epi pens to carry with me, plus an inhaler (the anaphylactic reactions cause immediate breathing issues for me) - and basically said that I should self-monitor my foods and any exposures, and to NEVER be skin or "challenge" tested again, due to the severity of the reaction! (healingwell.com)
Of course, I've read some horror stories on this board w/regards to anaphylactic reactions to skin pricks. (peanutallergy.com)
Specifically, patients receiving an ACE inhibitor may be hydrochlorothiazide at an increased canadian risk for anaphylactic-type reactions. (butler-bremer.com)

anaphylaxis and negative blood and skin tests? (healingwell.com)
Hi, sorry that you are having the negative tests with the anaphylaxis experiences! (healingwell.com)

2] The prevalence of this false-negative reaction does vary depending on reagent strip brand, with some brands showing greater sensitivity than others. (thefreedictionary.com)
Given the high sensitivity of nested PCR, precautions were taken to prevent reactions from being contaminated with previously amplified product, as well as to protect target RNA or DNA from other specimens and controls. (cdc.gov)

Our hypothesis is that the intervention group will have less variability as measured by mean deviation between exams and greater reliability as measured by the standard unreliability indexes of false positive rate, false negative rate, and fixation losses. (clinicaltrials.gov)

The direct test is applied to red cells which have been coated with antibody in vivo (e.g., in hemolytic disease of newborn, autoimmune hemolytic anemia, and transfusion reactions). (bioportfolio.com)

7) Subsequent restimulation of these sensitized lymphocytes with the same or a similar antigen, such as the intradermal injection of TUBERSOL, evokes a local reaction mediated by these cells. (nih.gov)
What reaction occurs when an insoluble antigen is mixed with its specific antibody? (studystack.com)

Vitamin C can cause analytical false negatives due to its anti-oxidant properties inhibiting the color reaction. (wikipedia.org)

In nickel allergic contact dermatitis-one of the more familiar clinical correlations-there is a high ratio of false-positive and false-negative reactions. (cosmeticsandtoiletries.com)
Infection by the dengue viruses (serotypes DEN-1, DEN-2, DEN-3 and DEN-4) leads to variable clinical manifestations, with possible reactions ranging from asymptomatic infection or undifferentiated fever to severe forms with hemorrhage and/or shock. (scielo.br)

However, the usefulness of this method is limited by false-positive reactions due to cross-reaction with other Gram-negative bacteria. (mendeley.com)

The maintenance of these false-negative animals in herds has serious implications for the control of the disease , since they can be a source of infection . (bvsalud.org)
The only evidence of infection may be a reaction to a tuberculin skin test. (cdc.gov)
When given a TST years after infection, these persons may have a false-negative reaction. (uintacounty.com)
This two-step approach can reduce the likelihood that a boosted reaction to a subsequent TST will be misinterpreted as a recent infection. (uintacounty.com)
But you can test negative if you were tested too early after infection for COVID-19 to be detected. (medlineplus.gov)

The details of how a tick bite leads to allergic reactions to red meat and other substances are not completely understood. (dermnetnz.org)

A negative beta-HCG result effectively excludes the diagnosis of an ectopic or intrauterine pregnancy. (medscape.com)

Then comes rolling reaction #3, and that is when they called 911 (that's right, the allergy doctor had to call for the EMS! (healingwell.com)
Therefore, in cases of apparent reactions to cosmetics and of eczema ani, allergy to methyldibromoglutaronitrile should be suspected. (unboundmedicine.com)

As appropriate, review all other significant and life-threatening adverse reactions and interactions, especially those related to the drugs, tests, and behaviors mentioned above. (thefreedictionary.com)

Positive correlations of concomitant reactions in different pairs of components of the fragrance mix have also been recorded in polyreactive patients. (cosmeticsandtoiletries.com)

Samples positive by CAP/CTM but negative by Amplicor displayed poor amplification curves compared to concordant positive samples. (worldwidescience.org)

For persons who are otherwise at low risk and are tested at the start of employment, a reaction of ≥15 mm induration is considered positive. (drugs.com)
The reaction should be measured in millimeters of the induration (palpable, raised, hardened area or swelling). (uintacounty.com)

Interpretation of semiquantitative reagent strips, which are colorimetric tests, requires knowledge of urine color because discolored urine may result in a false-positive result. (merckvetmanual.com)

56), "Oxidizing agents such as hypochlorite and ascorbic acid cause false-negative reactions for blood on the urine dipstick," cannot be answered true or false. (thefreedictionary.com)
3] False-negative reactions for both blood and sugar are a major problem if there is ascorbic acid in the urine. (thefreedictionary.com)

Carbapenemase-producing organisms (CPOs) are Gram-negative bacteria that are typically resistant to most or all antibiotics and are responsible for a global pandemic of high mortality. (bioportfolio.com)

Since few published studies of individual dipstick performance have included checks for urinary ascorbate, unsuspected urinary contamination with vitamin C may have been responsible for some of the false-negative reactions for hemoglobin and glucose noticed in earlier dipstick evaluations. (thefreedictionary.com)

There is an association between erythematous reactions to some allergens and irritant reactions to sodium lauryl sulfate. (cosmeticsandtoiletries.com)

None of these six research groups to report negative findings - which in the case of the UK included Professor John Gow, Dr Jonathan Kerr and Dr Jonathan Stoye and used patient samples from physicians including Dr Abhijit Chaudhuri and Professor Peter Behan - have been able to find XMRV in blood samples from ME/CFS patients, or in the healthy controls. (meassociation.org.uk)

Thrombosis and subsequent recanalization of a ruptured intracranial aneurysm in 2 children, demonstrating the value of repeating catheter angiography after an initial negative study. (biomedsearch.com)
However, the TST may stimulate the immune system, causing a positive, or boosted reaction to subsequent tests. (uintacounty.com)

Lesions of late congenital syphilis often represent scars from undetected, early congenital lesions or a delayed reaction to ongoing inflammation. (medscape.com)

My RAST tests are negative, however a couple of my skin tests have been both positive and negative. (healingwell.com)
if your son hasn't been exposed all these years, his RAST might show a false negative. (peanutallergy.com)
i have a false negative for my latex RAST levels, but a super positive skin/respiratory reaction. (peanutallergy.com)
RAST tests can give a false negative. (peanutallergy.com)

It's not too common to be negative to both tests. (healingwell.com)
May suppress reactions to skin tests. (empr.com)
When somebody tests positive for COVID here at the Kennedy Space Center and across NASA, it is our policy for that person to quarantine and self-isolate, so we anticipate that that will be taking place," NASA Administrator Jim Bridenstine said during a news conference today when asked about tweets in which Musk said he had received both positive and negative tests . (space.com)
Two tests came back negative, two came back positive. (space.com)

Contralateral inguinal hernia after negative laparoscopic evaluation: a rare but real phenomenon. (childrensmercy.org)

an erroneous or mistakenly negative response. (thefreedictionary.com)

False Negative Reactions" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (childrensmercy.org)

The compounds responsible for the reaction were named schaefferal A and B to honor Schäffer. (wikipedia.org)

All tumors showed negative immunohistochemical reaction for FH protein. (physiciansweekly.com)

Persons showing positive tuberculin reactions should be considered positive by current public health guidelines and referred for further medical evaluation. (drugs.com)

Anatomy1

Diseases17

Chemicals and Drugs3

Analytical, Diagnostic and Therapeutic Techniques and Equipment20

Psychiatry and Psychology2

Phenomena and Processes3

Anthropology, Education, Sociology and Social Phenomena1

Information Science6

Health Care6

Geographicals1

Rational sequence of tests for pancreatic function. (1/1867)

Abnormal responses to rubella infection. (2/1867)

Intimal tear without hematoma: an important variant of aortic dissection that can elude current imaging techniques. (3/1867)

Comparison of standard and CA-125 response criteria in patients with epithelial ovarian cancer treated with platinum or paclitaxel. (4/1867)

Recycling, channeling and heterogeneous protein turnover estimation using a model of whole-body protein turnover based on leucine kinetics in rodents. (5/1867)

HLA-B27 antigen in diagnosis of atypical seronegative inflammatory arthropathy. (6/1867)

Radioactive phosphorus uptake testing of choroidal lesions. A report of two false-negative tests. (7/1867)

An approach to the problems of diagnosing and treating adult smear-negative pulmonary tuberculosis in high-HIV-prevalence settings in sub-Saharan Africa. (8/1867)

Fibrinogen

Bacteriological Techniques

Evaluation Studies as Topic

False Positive Reactions

Radioimmunotherapy

Diagnostic Errors

Pulmonary Embolism

Filtering Surgery

Predictive Value of Tests

Algorithms

Embalming

Dictionaries, Medical

Dictionaries as Topic

Cellular Phone

False Negative Reactions

Dictionaries, Chemical

Drug Monitoring

Tuberculin

Tuberculin Test

Universal Precautions

BCG Vaccine

Practice Guidelines as Topic

Tuberculosis

Tomography, Spiral Computed

Tomography, X-Ray Computed

Tomography Scanners, X-Ray Computed

Lung Neoplasms

Lung

Carcinoma, Non-Small-Cell Lung

Positron-Emission Tomography

Brain Injuries

Post-Concussion Syndrome

Brain Concussion

Diffuse Axonal Injury

Brain Injury, Chronic

Blast Injuries

Glasgow Coma Scale

Intracranial Aneurysm

Subarachnoid Hemorrhage

Vasospasm, Intracranial

Aneurysm

Aneurysm, Ruptured

Cerebral Angiography

Embolization, Therapeutic

Vision Tests

Ethiopia

Visual Acuity

Visual Fields

Visual Field Tests

Glaucoma, Open-Angle

Glaucoma

Rational sequence of tests for pancreatic function. (1/1867)

Abnormal responses to rubella infection. (2/1867)

Intimal tear without hematoma: an important variant of aortic dissection that can elude current imaging techniques. (3/1867)

Comparison of standard and CA-125 response criteria in patients with epithelial ovarian cancer treated with platinum or paclitaxel. (4/1867)

Recycling, channeling and heterogeneous protein turnover estimation using a model of whole-body protein turnover based on leucine kinetics in rodents. (5/1867)

HLA-B27 antigen in diagnosis of atypical seronegative inflammatory arthropathy. (6/1867)

Radioactive phosphorus uptake testing of choroidal lesions. A report of two false-negative tests. (7/1867)

An approach to the problems of diagnosing and treating adult smear-negative pulmonary tuberculosis in high-HIV-prevalence settings in sub-Saharan Africa. (8/1867)

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Journal of Cytology (JOC)

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Cervical Cancer Screening (PDQ )

Kernel Memory Leak Detector - The Linux Kernel documentation

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Health and Well-Being | raygates.me

New HIV Test is Ten Times Cheaper, More Sensitive | HealthMap

Summary of CMS Call on Point-of-Care COVID-19 Testing for Nursing Homes - LONG TERM CARE LEADER

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Development and validation of method for TH588 and TH287, potent MTH1 inhibitors and new anti-cancer agents, for...

OPINION: A negative reaction to your ad is better than none at all - Nick Johnston-Jones believes its impossible for anyone to...

Negative reactions from friends & family re CCSVI

Gene Expression: Notes on the evidence for acceleration

UPARSE OTU radius