False Negative Reactions
Evaluation Studies as Topic
False Positive Reactions
Sensitivity and Specificity
Reproducibility of Results
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
Frozen Sections
Predictive Value of Tests
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.
Algorithms
Encyclopedias as Topic
MedlinePlus
Tuberculin Test
Gambia
Contact Tracing
Skin Tests
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) Latent tuberculosis (TB) refers to a state of infection with Mycobacterium tuberculosis, the bacteria that cause TB, where the person infected does not show any symptoms or signs of active disease. In this state, the immune system is able to contain the infection and prevent it from progressing to active TB.
Latent TB can be diagnosed through a skin test (such as the PPD test) or a blood test (such as the QFT-GIT test), which detect the presence of TB antigens in the body. If the results are positive, it indicates that the person has been infected with M. tuberculosis, but the infection is currently dormant.
People with latent TB are not infectious to others and do not have any symptoms. However, if their immune system weakens or they experience significant stress, the infection can become active, leading to active TB.
Latent TB is common, particularly among people who have been exposed to someone with active TB. It is estimated that one-third of the global population has latent TB infection.
There are several treatment options available for latent TB, including:
1. Antibiotics: The most commonly used antibiotics are isoniazid and rifampin. These medications can help to reduce the risk of developing active TB.
2. Vaccination: The Bacille Calmette-Guérin (BCG) vaccine can provide some protection against latent TB, particularly in children. However, it is not effective in adults.
3. Antiretroviral therapy (ART): In people with HIV/AIDS, ART can help to reduce the risk of developing active TB.
4. Monitoring: Regular monitoring and follow-up are essential to detect any progression to active TB.
It is important to note that latent TB is not a diagnosis, but rather a state of infection. It is important to differentiate between active TB and latent TB, as they require different treatment approaches.
Chemical test in mushroom identification
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 ...
Urine test strip
False-negative reactions can result when urine with a high specific gravity contains crenated red blood cells that do not lyse ... Traditionally, ascorbic acid (vitamin C) has been associated with false-negative reagent strip reactions for blood. Both ... The formaldehyde used as a preservative produces false negatives in both reactions. Urinary infections can be identified ... The presence of strong oxidising agents or formaldehyde can cause false positives. False negative results are associated with ...
COVID-19 testing
"Variation in False-Negative Rate of Reverse Transcriptase Polymerase Chain Reaction-Based SARS-CoV-2 Tests by Time Since ... a false negative). Even relatively high sensitivity rates can produce high rates of false negatives in populations with low ... Test errors can be false positives (the test is positive, but the virus is not present) or false negatives, (the test is ... On 4 January 2021, the US FDA issued an alert about the risk of false results, particularly false negative results, with the ...
Voges-Proskauer test
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 ... Voges-Proskauer reaction at Merriam-Webster Online [1] (Articles with short description, Short description matches Wikidata, ...
Antibodies from lymphocyte secretions
... 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 ...
Stool guaiac 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. ...
Elvis Presley
It fosters almost totally negative and destructive reactions in young people. It smells phoney and false. It is sung, played ... He was out of prison, man." Binder said of Presley's reaction, "I played Elvis the 60-minute show, and he told me in the ... According to Moore, "His movement was a natural thing, but he was also very conscious of what got a reaction. He'd do something ... Presley had another attack of nerves during the first set, which drew a muted reaction. A more composed and energetic second ...
Allergic reactions to anesthesia
However, skin testing can be misleading in giving false positive and false negative results. Although complications during ... Serious allergic reactions to anesthetic medications are rare and a usually attributable to factors other than the anesthetic. ... The severity of the reaction whilst under anesthesia is because the anesthetist is only made aware of the allergy when it is ... Anesthetists are trained to recognise if an allergic reaction is occurring. The identification of a complication is made by the ...
Hook effect
In this case, the result is a false negative. The range of relatively high antibody concentrations within which no reaction ... Stamm AM, Polt SS (September 1980). "False-negative cryptococcal antigen test". JAMA. 244 (12): 1359. doi:10.1001/jama.244.12. ... resulting in false negatives or inaccurately low results. Other common forms of interference include antibody interference, ... include high levels of syphilis antibodies in HIV patients or high levels of cryptococcal antigen leading to false negative ...
Ranitidine bismuth citrate
H 2 -histamine receptor blockers can suppress the cutaneous reaction to histamine, thus resulting in to false negative results ... Allergic reactions: pruritus, urticaria, angioedema, bronchospasm, anaphylactic shock, anaphylactoid reactions. Others: ... histamine receptor blockers before performing diagnostic skin tests to detect an immediate allergic skin reaction). As with the ...
Chlamydia trachomatis
... meaning they are very accurate and are very unlikely to have false-negative test results. A polymerase chain reaction (PCR) ... Chlamydia trachomatis is a gram-negative bacterium that can replicate only within a host cell. Over the course of the C. ... The bacterium is still classified as gram-negative C. trachomatis agent was first cultured and isolated in the yolk sacs of ... though the reaction's speed is slower in C. trachomatis.[citation needed] Other research has been conducted to try to get a ...
Guinea pig maximisation test
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 ...
Reaction to the verdict in the O. J. Simpson criminal trial
... that are used to determine if contamination like he was suggesting occurred were also coincidentally all false negatives. So ... The strong public reaction to Brown's letters and statements that were later ruled inadmissible as hearsay spurred passage of ... That false claim notwithstanding, his testimony wasn't reliable they said because he was clearly pandering to the defense: all ... In the aftermath of the verdict, many of the experts began walking back their claims due to the negative impact the case had ...
Brucellosis
The inability to diagnose B. canis by SAT due to lack of cross-reaction is another drawback. False-negative SAT may be caused ... 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 ... Demonstration of antibodies against the agent either with the classic Huddleson, Wright, and/or Bengal Rose reactions, either ...
Tine 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 ...
HLA-DQ7
... 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- ...
Daria
... ran the risk of setting up false expectations and disappointment in the viewers - which could lead to a negative reaction to ...
Neurosyphilis
False-negative antibody test result occurring when antibody concentration is so high that agglutination reaction cannot occur, ... The Jarisch-Herxheimer reaction is an immune-mediated response to syphilis therapy occurring within 2-24 hours. The exact ... A positive test confirms neurosyphilis but a negative result does not rule out neurosyphilis. Due to the low sensitivity of the ... "Generalized Convulsive Status Epilepticus Secondary to Jarisch-Herxheimer Reaction in Neurosyphilis: A Case Report and ...
Effects of stress on memory
... 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. ...
Menace reflex
Such reactions to non-visual stimuli are a widespread cause of false positives and false negatives when pet owners test their ...
Penile plethysmography
... show a normal reaction to the test. The Government argues that such false negatives render the test unreliable." According to ... "Until a way can be devised to detect and/or control false negatives and false positives, the validity of the test data will be ... accurate Results are subject to faking and voluntary control by test subjects High incidence of false negatives and false ... Abel, G. G.; Huffman, J.; Warberg, B.; Holland, C. L. (1998). "Visual reaction time and plethysmography as measures of sexual ...
Radical chic
The negative reaction prompted publication of an op-ed in the Times on January 16 entitled "False Note on Black Panthers" that ... "False Note on Black Panthers". The New York Times. January 16, 1970. Bernstein, Felicia M. (January 21, 1970). "Letters to the ...
Sesame allergy
... reason for false negative skin prick test results even though the oleosins can be responsible for a range of allergic reactions ... However, skin prick tests sometimes give false negatives due to the lack of oleosin proteins in standardized sesame extracts. ... so the results of skin prick tests can present a false negative whereas using freshly ground seeds elicits a true positive. ... and macrophages to the initial reaction sites. This is usually seen 2-24 hours after the original reaction. Cytokines from mast ...
Schiff test
... 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. ...
The Crown (TV series)
... so it seems more cruel in its false depictions". Following some negative reactions to the fourth season, British culture ... such was the intensely negative reaction to their portrayals. Throughout the season, the Private Secretary to the Sovereign is ... Vickers, Hugo (25 November 2020). "How accurate is The Crown season 4? What's true and false in the Netflix series". The Times ... Gordonstoun School responded to its negative portrayal, claiming that Prince Charles's personal feedback to the school had been ...
Tanishq
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 ...
Psittacosis
A polymerase chain reaction-based test is also available. Although any of these tests can confirm psittacosis, false negatives ...
Alpha-gal allergy
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 mammalian 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. ...
Ploy (film)
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 ...
Plague (disease)
... there is a possibility for false negative results. Polymerase chain reaction (PCR) may also be used to diagnose plague, by ... they may have a false negative culture and a positive PCR result. Blood tests to detect antibodies against Y. pestis can also ... However, when using the rapid test, both positive and negative results need to be confirmed to establish or reject the ...
Pirates of the Caribbean: Dead Men Tell No Tales
Rahman, Abid (March 28, 2017). "'Pirates of the Caribbean: Dead Men Tell No Tales': First Reactions From CinemaCon Screening". ... The film received generally negative reviews from critics and grossed $795 million worldwide against a production budget ... its delight in its own inventions so forced and false, that it becomes almost the perfect opposite of entertainment." Michael ... Analysts attributed the underperformance to negative reviews, franchise fatigue, and Johnny Depp's diminishing returns and ...
Health realization
HR aims to offer deeper relief by showing that negative and stressful feelings are self-generated and thus can be self-quieted ... But, when their thinking changes, reality seems different and their reactions change. Thus, according to HR, people are ... T.M. Kelley, Positive Psychology and Adolescent Mental Health: False Promise or True Breakthrough? Adolescence, June 22, 2004 T ... People tend to experience their reality as stressful, according to HR, when they are having insecure or negative thoughts. But ...
100,000,000 Guinea Pigs
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, which contradicts today's view that ... 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 ...
Veterans benefits for post-traumatic stress disorder in the United States
... the rate of false-negatives decreases. Certain tests are known to yield false negative results at a certain rate; in all tests ... hypervigilance and intense startle reactions. Some research suggests that VA disability benefits achieve their goal of helping ... The study found significant rates of both false positive and false negative VBA adjudicative decisions. Although VBA ... For lifetime PTSD, the proportion of false negatives was approximately twice the proportion of false positives. ... PTSD ...
Job interview
Applicants' negative reactions to structured interviews may be reduced by providing information about the job and organization ... Giving socially acceptable, but part or completely false, answers can inflate interview scores. One simple example of socially ... Interview design can influence applicants' positive and negative reactions, though research findings on applicants preferences ... A Laboratory Study of Reactions to Puzzle Interviews: Reactions to Puzzle Interviews". Journal of Applied Social Psychology. 42 ...
September 1968
Critical reaction to the series was favorable, as the AP writer described it as "a welcome addition to the network's schedule- ... Critics were generally negative; one critic said that Adam-12 was one of four weekend shows and that "None, unhappily, seems ... false eyelashes and copies of magazines like Playboy. A description, by reporter Lindsy Van Gelder and the New York Post of the ... comparing and contrasting the reactions of both Richard Nixon and Hubert Humphrey to their respective nominations for the ...
Michelle Malkin
Malkin and her family were subsequently banned from using Airbnb in reaction to her having appeared at the event. According to ... negative response" from other students on campus. She graduated in 1992 and later described her alma mater as "radically left- ... published an open letter condemning the book for not having undergone peer review and arguing that its central thesis is false ... as the billionaire continues to be at the center of false coronavirus claims". Business Insider. Archived from the original on ...
Friday Night Lights: A Town, a Team, and a Dream
The negative reaction to the playoff situation was exacerbated by the book, and many residents of Odessa received the book with ... He cites these stories as key examples of the false world Permian football can have on its players. Permian then beats ... In response to the negative reaction in Odessa, a local bookstore cancelled a book signing by the author, and T-shirts ... Bissinger uses Boobie as an example of the negative effect high school football can have its players. Boobie is not a good ...
Thomas Cranmer
He then said, "And as for the pope, I refuse him, as Christ's enemy, and Antichrist with all his false doctrine." He was pulled ... The Prayer Book Rebellion and other events had a negative effect on the Seymour regency. The Privy Council became divided when ... His reassertion of the doctrine of justification by faith elicited a strong reaction from Gardiner. In the "Homily of Good ... When rumours spread that he authorised the use of the mass in Canterbury Cathedral, he declared them to be false and said, "[A] ...
2022 monkeypox outbreak
In reaction to the current outbreak of monkeypox, a number of countries have stated they are buying vaccines and/or releasing ... "Kolkata youth tests negative for monkeypox, is being treated for chickenpox". News 9. 10 July 2022. Retrieved 16 July 2022. ... "Five conspiracy theories about monkeypox debunked as false claims start to spread online". inews.co.uk. 23 May 2022. Archived ... "Negative test for third suspected monkeypox case". Fiji Broadcasting Corporation. Archived from the original on 28 June 2022. ...
George Wickham
The reactions of the Bennet family are mixed: Mrs Bennet, relieved to see a first daughter duly married, and delighted that it ... Susan Morgan regards Wickham as being designed by Austen to be a stock villain in both his "false face as a charming young man ... so Wickham appears as the double negative of Darcy: he takes liberties with the truth (Darcy claims to have a horror of lying ... and especially during the scene of the first marriage proposal where Darcy has a strong jealous reaction when Elizabeth again ...
European Union merger law
The proposed change in the law was to ensure that activities that lead to a negative effect on the consumer's welfare would be ... whether firms can deploy deterrents and whether firms are safe from a reaction by their competitors and consumers. The entry of ... increasingly began to be called into question with concerns regarding the issues of overenforcement and the false positives. ... the effect of that merger could have a negative impact on Europe's competition market. Bearing in mind that thousands of the ...
Cult
Since the 1970s, the secular anti-cult movement has opposed certain groups and, as a reaction to acts of violence, frequently ... While most of these negative qualities usually have real documented precedents in the activities of a very small minority of ... Cowan, Douglas E. (2003). Bearing False Witness? An Introduction to the Christian Countercult. Westport, CT: Praeger. ISBN 978- ... Sociologists critical to this negative politicized use of the word "cult" argue that it may adversely impact the religious ...
2019 Turkish offensive into north-eastern Syria
The negative sentiment against refugees among the Turkish electorate allows Erdogan and his AKP to benefit from moving refugees ... Other US officials, however, refuted the accusations, which they called baseless and false. They stated that the SDF are still ... Brzozowski, Alexandra (25 October 2019). "NATO slams Turkey over Syria, lukewarm reactions to German 'safe zone' proposal". ... Later, Erdoğan told that Syrian Government troops entering Manbij is "not negative" and adding "as long as terrorists in the ...
Verse of Purification
These and the accounts about the inclusion of the Umayyads in the Ahl al-Bayt might have been later reactions to Abbasid claims ... According to Nasr et al., (spiritual) defilement (rijs) encompasses all evil deeds and false beliefs that arise from the " ... but received the negative response, "Thou shalt obtain good. Thou shalt obtain good." There exists a version of this hadith in ... the innate protection against all false beliefs or evil deeds. Isma is viewed as a God-given consciousness that overrides all ...
Medieval cuisine
The change in attitudes can be illustrated by the reactions to the table manners of the Byzantine princess Theodora Doukaina in ... Beer was just an acceptable alternative and was assigned various negative qualities. In 1256, the Sienese physician ... "false thirst" associated with wine. Though less prominent than in the north, beer was consumed in northern France and the ... and the secretary of Leo of Rozmital wrote a very skeptical account of his reaction to being served barnacle goose at a fish- ...
Migrant worker
Although this has not been proven to be entirely true or false, studies have been done which show that many children of migrant ... Additionally, relocation has negative social consequences on students: isolation from peers due to cultural differences and ... In the United States, migrant farm workers experience work-related bone problems, respiratory problems and allergic reactions. ... The jury also found that one of the plaintiffs was a victim of false imprisonment and retaliation." There have been many cases ...
Sidney Psalms
This is seen when the speaker pleads to God to "Save me from bad wights, In false colours dressèd." (Sidney, 2009, p. 83). The ... By making the "delight" from the "heart" Sidney makes the "delight" a purely emotional reaction, whereas, without this addition ... but the different level of negative connotation remains. Often in biblical literature the "ungodly" simply need educating and ... "false colours" (Sidney, 2009, p. 83). A possibility here could be that those that represent the heraldic insignia are corrupt, ...
Todd Manning
The montage included reaction shots of those witnessing the execution, shots of Starr crying in the presence of a lynch mob ... He eventually admits he only pretended to get along with Victor to lure him into a false sense of security. Victor admits that ... He's got his good side with his kids, and yet he is conniving and vicious and all those negative things". The show's writers ... Todd and a rogue CIA agent force Tomás into a false confession. Todd faces difficulty bonding with Jack, who only accepts ...
Betrayal trauma
Others think substance use is a way to cope with posttraumatic negative affect traits such as avoidance, tension reduction or ... BTT indicates that childhood sexual abuse and other interpersonal injuries create the dissociative reaction. Dissociative ... True and False Recovered Memories. Nebraska Symposium on Motivation. Nebraska Symposium on Motivation. Nebraska Symposium on ... Bowlby emphasizes that traumatizing experiences with one's caregiver which is likely to result in negative impacts a child's ...
Predictive medicine
Furthermore, the potential false positives or false negatives that may arise from a predictive genetic screen can cause ... Some people are vulnerable to adverse psychological reactions to genetic predictions of stigmatized or feared conditions, such ...
Prince Andrew, Duke of York
... it received negative reactions from both the media and the public, both in and outside of the UK. The interview was described ... Prince Andrew also added that Giuffre's claims about dancing with him at a club in London while he was sweaty were false due to ... There was a mixed reaction by commentators to his presence, with some saying that it would send the wrong message to victims of ... On 29 October 2021, Andrew's lawyers filed a response, stating that their client "unequivocally denies Giuffre's false ...
Bumblebee
The sting is painful to humans, and not medically significant in most cases, although it may trigger an allergic reaction in ... In North America, pathogens are possibly having a stronger negative effect especially for the subgenus Bombus. A major impact ... ISBN 978-0-19-923325-0. Wedgwood, Hensleigh (1855). "On False Etymologies". Transactions of the Philological Society (6): 67. " ... "considerable negative effect" on wild bumblebee populations throughout the developed world. However, in another study, ...
COVID-19
A competition of negative feedback loops (via protective effects of interferon alpha) and positive feedback loops (via ... Deep cleaning and other surface sanitation has been criticised as hygiene theatre, giving a false sense of security against ... COVID-19 testing methods to detect the virus's nucleic acid include real-time reverse transcription polymerase chain reaction ( ... leading to a different immunological reaction to infections during the course of pregnancy. Respiratory: Many factors can make ...
List of sporting scandals
Negative post reactions then occurred after the match. Trevor Chappell was best remembered for the incident. John the bookmaker ... Deflategate (2015) - during the AFC Championship Game, 11 of the 12 footballs (this was later proved to be false) under the ...
Death anxiety
May believed that this dichotomy could lead to negative anxiety that hindered life, or a positive anxiety that would lead to a ... Paul T. P. Wong's work on the meaning management theory indicates that human reactions to death are complex, multifaceted and ... What we know about human attitudes towards death indicates that Heidegger's generalization is false. Some men, and not only ... As society and families drift apart so does the time spent bereaving those who have died, which in turn leads to negative ...
Eros and Civilization
He dismissed the ideas of both Marcuse and Brown as false and harmful. Eros and Civilization received a mixed review from the ... Weineck credited Marcuse with anticipating later reactions to Freud in the 1960s, which maintained in opposition to Freud that ... and a negative review from the philosopher Herbert Fingarette in The Review of Metaphysics. In the American Journal of ... and that his appeal to the benefits of automatism is blind to its negative effects" and that his "vision of the good life as ...
2022 anti-war protests in Russia
We collected reactions on social networks.]. Культура и стиль жизни (Culture and lifestyle) (in Russian). Deutsche Welle. ... Many respondents do not want to answer pollsters' questions for fear of negative consequences. In March 2022, when a Russian ... "Russian Lawmakers OK Bill On 'False News' About Military Operations, In Further Curb On Media". Radio Free Europe/Radio Liberty ... Movchan, Andrey (28 February 2022). "Western Reaction to War in Ukraine Plays into Vladimir Putin's Hands". The Moscow Times. ...
Psychogenic non-epileptic seizure
However, due to false positives and variability in results, this test is relied upon less frequently. Some features are more or ... A negative diagnosis experience may cause frustration and could cause a person to reject any further attempts at treatment. ... This therapy focuses on the idea that PNES are caused by a learned physical reaction or habit the body develops, similar to a ... The individual does not have control of the learned reaction, but this can be retrained to allow the patient to control the ...
Lyme disease
A positive IgM and negative IgG test result after the first month of infection is generally indicative of a false-positive ... Polymerase chain reaction (PCR) tests for Lyme disease have also been developed to detect the genetic material (DNA) of the ... Even when properly performed, PCR often shows false-negative results because few Borrelia cells can be found in blood and ... The production of this reaction might be due to a form of molecular mimicry, where Borrelia avoids being killed by the immune ...
Browsing by Subject "False Negative Reactions"
Variation in False-Negative Rate of Reverse Transcriptase Polymerase Chain Reaction-Based SARS-CoV-2 Tests by Time Since...
Variation in False-Negative Rate of Reverse Transcriptase Polymerase Chain Reaction-Based SARS-CoV-2 Tests by Time Since ... Variation in False-Negative Rate of Reverse Transcriptase Polymerase Chain Reaction-Based SARS-CoV-2 Tests by Time Since ... Results: Over the 4 days of infection before the typical time of symptom onset (day 5), the probability of a false-negative ... Measurements: A Bayesian hierarchical model was fitted to estimate the false-negative rate by day since exposure and symptom ...
Tuberculin Purified Protein Derivative(Mantoux)TUBERSOL®
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 ...
Screening for Tuberculosis and Tuberculosis Infection in High-Risk Populations Recommendations of the Advisory Council for the...
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 ...
Epidermal growth factor receptor mutation status in circulating free DNA in serum: from IPASS, a phase III study of gefitinib...
... cfDNA results identified no false positives but a high rate of false negatives (56.9%). There was a significant interaction ... likely due to the high rate of false negatives within this subgroup. ... was a slight numerical advantage in PFS and ORR for gefitinib over carboplatin/paclitaxel in the cfDNA EGFR mutation-negative ... False Negative Reactions * Female * Gefitinib * Humans * Lung Neoplasms / blood * Lung Neoplasms / drug therapy* ...
NIH VideoCast - False Positives, False Negatives, and Small Effects: Genome, Exposome, and Nutrition
False Negatives, and Small Effects: Genome, Exposome, and Nutrition ... False Negative Reactions. False Positive Reactions. Neoplasms Publication Types: Lecture. Webcast NLM Classification: QZ 206 ... False positives, false negatives, and small effects : genome, exposome, and nutrition / John P.A. Ionannidis, MD, DSc. ... To present theoretical arguments regarding the relative presence of false positive and false negative associations in ...
Methaemoglobinaemia and haemolysis following pegloticase infusion for refractory gout in a patient with a falsely negative...
Methaemoglobinaemia and haemolysis following pegloticase infusion for refractory gout in a patient with a falsely negative ... False Negative Reactions Actions. * Search in PubMed * Search in MeSH * Add to Search ... Infusion-related reactions with pegloticase, a recombinant uricase for the treatment of chronic gout refractory to conventional ... Methaemoglobinaemia and haemolysis following pegloticase infusion for refractory gout in a patient with a falsely negative ...
Publication Detail
MeSH Terms: Animals; Birds/virology; Cattle; False Negative Reactions; Feedback, Physiological*; Host-Pathogen Interactions/ ... and D+ data were found in the positive and negative phases. In humans, spatial patterns revealed false-negative observations ... from disease-negative (D-, or microbial-negative) groups: D+ and D- data distributions overlapped. In contrast, multi- ... In all studies, the 3D, SB/EB approach distinguished three (steady, positive, and negative) feedback phases, in which D- data ...
Advanced Search Results - Public Health Image Library(PHIL)
Effect of Pesticide(s) Carryover on Results of Polymerase Chain Reaction
and Multiplex-PCR for Diagnosis of Potato...
Carryover on Results of Polymerase Chain Reaction and Multiplex-PCR for Diagnosis of Potato Bacterial Pathogens ... Multiplex-PCR of mixed DNA s of R. solanacearum and C. michiganensis ssp. sepedonicus caused a false negative reaction through ... False-negative results by polymerase chain reaction due to contamination by glove powder. Transfusion, 32: 83-85.. CrossRef ... sepedonicus which may be considered as false negative reaction. The effect may be attributed to direct interference of the ...
MeSH Browser
False Negative Reactions Preferred Concept UI. M0008177. Scope Note. Negative test results in subjects who possess the ... False Negative Reactions Preferred Term Term UI T015893. Date01/01/1999. LexicalTag NON. ThesaurusID POPLINE (1990). ... False Negative Reactions. Tree Number(s). E01.354.340. Unique ID. D005188. RDF Unique Identifier. http://id.nlm.nih.gov/mesh/ ... Negative test results in subjects who possess the attribute for which the test is conducted. The labeling of diseased persons ...
Biomarkers Search
High false-negative rate of HER2 quantitative reverse transcription polymerase chain reaction of the Oncotype DX test: an ... 1. HER2 equivocal breast cancer that is positive by alternative probe HER2 FISH are classified as HER2 negative by Oncotype DX. ... comparison of fluorescence in situ hybridization and quantitative reverse transcription polymerase chain reaction performed by ... Correlation between HER2 determined by fluorescence in situ hybridization and reverse transcription-polymerase chain reaction ...
IJMS | Free Full-Text | COVID-19 and Diagnostic Testing for SARS-CoV-2 by RT-qPCR-Facts and Fallacies
Variation in false-negative rate of reverse transcriptase polymerase chain reaction-based SARS-CoV-2 tests by time since ... To avoid false negatives, it is essential to develop, and include, reference materials that can be spiked into patient samples ... Wikramaratna, P.S.; Paton, R.S.; Ghafari, M.; Lourenço, J. Estimating the false-negative test probability of SARS-CoV-2 by RT- ... False-negative results, which change over the course of an infection [69], are problematic because they not only lead to an ...
DailyMed - TUBERSOL- tuberculin purified protein derivative injection, solution
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 ...
MeSH Browser
False Negative Reactions Preferred Concept UI. M0008177. Scope Note. Negative test results in subjects who possess the ... False Negative Reactions Preferred Term Term UI T015893. Date01/01/1999. LexicalTag NON. ThesaurusID POPLINE (1990). ... False Negative Reactions. Tree Number(s). E01.354.340. Unique ID. D005188. RDF Unique Identifier. http://id.nlm.nih.gov/mesh/ ... Negative test results in subjects who possess the attribute for which the test is conducted. The labeling of diseased persons ...
PPD skin test: MedlinePlus Medical Encyclopedia
Larger reactions (larger than or equal to 10 mm) are considered positive in:. *People with a known negative test in the past 2 ... Also, diseases or medicines that weaken the immune system may cause a false-negative result. ... With a negative reaction, the skin where you received the PPD test is not swollen, or the swelling is very small. This ... A negative reaction usually means you have never been infected with the bacteria that cause TB. ...
WHO EMRO | Incidence of incidental positron emission tomography and computed tomography signs of COVID-19 in asymptomatic...
Practice Alert: Proper Positioning for Swabbing Nasopharyngeal Area Affects Reliability of COVID-19 Tests | New York State...
The rate of false-negative results in reverse transcriptase polymerase chain reaction testing is a great concern because it ... Higgins, T.S., Wu, A.W., & Ting, J.Y. (September 17, 2020). SARS-CoV-2 Nasopharyngeal Swab Testing-False-Negative Results From ... Inadequate nasopharyngeal swab collection may continue to lead to false-negative results. ... false negative rate.³. Frequently, and because this test is uncomfortable, a patient or the practitioner may retract ...
Diagnóstico | RefNet
DeCS
False Negative Reactions Entry term(s). False Negative Reaction Reaction, False Negative Reactions, False Negative ... False Negative Reactions - Preferred Concept UI. M0008177. Scope note. Negative test results in subjects who possess the ... False Negative Reaction. Reaction, False Negative. Reactions, False Negative. Tree number(s):. E01.354.340. ... Negative test results in subjects who possess the attribute for which the test is conducted. The labeling of diseased persons ...
DailyMed - CARBIDOPA AND LEVODOPA tablet
This reaction will not be altered by boiling the urine specimen. False-negative tests may result with the use of glucose- ... Carbidopa and levodopa may cause a false-positive reaction for urinary ketone bodies when a test tape is used for determination ... ADVERSE REACTIONS The most common adverse reactions reported with carbidopa and levodopa have included dyskinesias, such as ... Other adverse reactions that have been reported with levodopa alone and with various carbidopa and levodopa formulations, and ...
Pesquisa | Biblioteca Virtual em Saúde - BRASIL
False-negative reactions of both ELISAs occurred in 30.3%, mostly in patients who had low antibody levels in the screening ... The Em2plus-ELISA exhibited fewer false-negative reactions than the Em10-ELISA. The WB confirmed the positive results of either ... have emerged during the last 10 years leading to false-negative results in HRP2-based rapid diagnostic tests (RDTs). This can ... CONCLUSION: HRP2-negative P. falciparum strains may not be recognized by the presently available HRP2-based RDTs. When malaria ...
HIV in Pregnancy: Practice Essentials, Epidemiology, Prophylaxis and Pregnancy Outcome
False-negative results may occur early in the disease, and false-positive results have been reported after certain vaccines. ... For the Western blot, specific viral proteins are separated by electrophoresis, and reaction of antibody to 3 proteins must ... HIV-infected pregnant women who screen negative for hepatitis B virus (HBV) (ie, HBsAg-negative, anti-HBc-negative, and anti- ... False-negative HCV test results may occur if the CD4+ count is very low. More specific tests (eg, hepatitis C viral RNA ...
SpaceX's Elon Musk says he's tested positive for COVID-19 on eve of NASA astronaut launch - VectorsJournal
Although a polymerase chain reaction test is typically more accurate, it will still produce false negatives and more rarely, ... For the specific test Musk used, false positives are more likely when COVID-19 infection rates are low and false negatives are ... Every testing method for every infection will produce a certain number of false positive and false negative detections: some ... But the individual response to a negative test varies. "If a person has not had any known exposure to COVID-19 and is not ...
GamesFirst! || Search
id=1406" onClick="window.open( this.href, _self ); return false;" title="">Videogame Violence Causes Subdued Reactions. ... "Videogame Violence Causes Subdued Reactions. we recieved feedback, some positive, some negative. But there was one response ... id=1406" onClick="window.open( this.href, _self ); return false;" title=""> ...
Validation of the Charm MRL-3 for fast screening of beta-lactam antibiotics in raw milk
- ILVO
False Negative Reactions, False Positive Reactions, Goats, Horses, Milk, Reproducibility of Results, Sensitivity and ... Finally, the test was integrated in the monitoring of dairy samples to check the occurrence of false-negative or false-positive ... Finally, the test was integrated in the monitoring of dairy samples to check the occurrence of false-negative or false-positive ... Finally, the test was integrated in the monitoring of dairy samples to check the occurrence of false-negative or false-positive ...
Reverse transcriPositivesPolymerase chain reTuberculin testAntigenResultsInfectionOccurDiagnosisEnzyme reactionAllergic reactionHypersensitivityAdverse reactionsTestsBacteriaSystemicReagentImmuneMedicationsInterpretationSymptomsHighRateInjectionSpecificPresentSkinResultControlSensitiveAreaCaseSitePeople
Reverse transcri1
- Tests for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) based on reverse transcriptase polymerase chain reaction (RT-PCR) are being used to rule out infection among high-risk persons, such as exposed inpatients and health care workers. (nih.gov)
Positives1
- For the specific test Musk used, false positives are more likely when COVID-19 infection rates are low and false negatives are more likely when disease rates are high, according to materials about the test published by the Food and Drug Administration. (vectorsjournal.org)
Polymerase chain re6
- 4. Human epidermal growth factor receptor 2 assessment in a case-control study: comparison of fluorescence in situ hybridization and quantitative reverse transcription polymerase chain reaction performed by central laboratories. (nih.gov)
- 6. Correlation between HER2 determined by fluorescence in situ hybridization and reverse transcription-polymerase chain reaction of the oncotype DX test. (nih.gov)
- Radiological tools such as chest computed tomography (CT) are crucial for diagnosis of COVID-19 in patients with false-negative results for reverse transcription polymerase chain reaction (RT-PCR) (9). (who.int)
- The specific technique that's used is called reverse transcription polymerase chain reaction, or RT-PCR, where genetic material from a sample is copied and then compared to the genetic sequence of the virus that is being tested for. (nysna.org)
- Reverse transcription polymerase chain reaction (RT-PCR)-based diagnostic tests (which detect viral nucleic acids) are considered the gold standard for detecting current SARS-CoV-2 infection. (nih.gov)
- Antigen tests detect proteins from the virus particles and are typically less sensitive than polymerase chain reaction (PCR) tests, so a false negative is possible. (nyp.org)
Tuberculin test1
- Not all infected persons will have a delayed hypersensitivity reaction to a tuberculin test. (nih.gov)
Antigen5
- 6) 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)
- If you have COVID-19 symptoms but test negative on an antigen test, follow up with a PCR test and isolate at home while waiting for results. (nyp.org)
- After adding enzyme-labeled antigen or antibody, it is also bound to the solid-phase carrier through the reaction. (medicilon.com)
- Any injected antigen has the potential to produce severe allergic reactions or anaphylaxis. (nielsenbio.com)
- CANDIN should not be used after a previous unacceptable adverse reaction to this antigen or to a similar product, i.e., extreme hypersensitivity/allergy. (nielsenbio.com)
Results12
- It is critical to understand how the predictive value of the test varies with time from exposure and symptom onset to avoid being falsely reassured by negative test results. (nih.gov)
- Negative test results in subjects who possess the attribute for which the test is conducted. (nih.gov)
- Inadequate nasopharyngeal swab collection may continue to lead to false-negative results. (nysna.org)
- Diagnostically, some NAATs may produce false negative results if a mutation occurs in the part of the virus's genome that is assessed by that test. (nih.gov)
- BACKGROUND: Plasmodium falciparum strains with mutations/deletions of the genes encoding the histidine-rich proteins 2/3 (pfhrp2/3) have emerged during the last 10 years leading to false-negative results in HRP2-based rapid diagnostic tests (RDTs). (bvsalud.org)
- Finally, the test was integrated in the monitoring of dairy samples to check the occurrence of false-negative or false-positive results, and the test was also included in a national ring trial and an international proficiency study. (ilvo.be)
- Every testing method for every infection will produce a certain number of false positive and false negative detections: some number of positive tests when there is no infection and negative results when there is infection. (vectorsjournal.org)
- Lyme disease testing is notoriously misleading, patients often have false negatives, confusing tests results and reactions to medications that don't seem to make sense. (drbrianlum.com)
- Some high specific gravity/low pH urines may give reactions up to and including Trace Normal urine specimens usually yield negative results with this reagent. (accurexbiomedical.com)
- False positive results (Trace) may occur with highly pigmented urine specimens or those containing large amounts or levodopa metabolites. (accurexbiomedical.com)
- Negative results may occur when urinary tract infections are cause by organisms which do not contain reductase to convert nitrate to nitrite, when urine has not been retained in the bladder long enough (4-&hrs) for reduction of nitrate to occur, or when dietary nitrate is absent, even if organisms containing reductase are present and bladder incubation is ample. (accurexbiomedical.com)
- Excreted pigments and medicaments that have a red colomaton in acidic medium may produce false positive results. (accurexbiomedical.com)
Infection5
- To estimate the false-negative rate by day since infection. (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)
- The only evidence of infection may be a reaction to a tuberculin skin test. (cdc.gov)
- Contacts of adults with tuberculosis (TB) are at risk for reactions, and those with malnutrition, measles, and HIV infection. (cdc.gov)
- CASE DESCRIPTION: Here the detection of a pfhrp2/3-negative P. falciparum infection acquired in Ethiopia by a 63-year old female traveller is presented. (bvsalud.org)
Occur7
- Allergic reactions may occur following the use of TUBERSOL even in persons with no prior history of hypersensitivity to the product components. (nih.gov)
- False positive or false negative tuberculin skin test reactions may occur in some individuals. (nih.gov)
- False positive tuberculin reaction tests occur in individuals who have been infected with other mycobacteria, including vaccination with BCG. (nih.gov)
- This reaction can also occur in a few people who have not been tested before. (medlineplus.gov)
- Reactions will occur within 20 minutes. (capitalaai.com)
- Larger accelerated reactions can occur, which may require treatment with local cold compresses and anti-inflammatory medication. (nielsenbio.com)
- Systemic reactions can occur with skin test antigens and in certain individuals these reactions may be life-threatening or cause death. (nielsenbio.com)
Diagnosis1
- Mycobacterium bovis BCG or infected with mycobacteria children were identified by visiting the households of other than M . tuberculosis can have false-positive TST adults whose TB had been diagnosed at enrollment in a separate study of TB diagnosis from September 2003 to November 2004 ( 10 ). (cdc.gov)
Enzyme reaction3
- After adding the substrate of the enzyme reaction, the substrate is catalyzed by the enzyme to become a colored product. (medicilon.com)
- 3) Substrate of enzyme reaction. (medicilon.com)
- The main reason is that they were all burdened with inherent problems associated with their detection systems (colloidal gold, latex particle aggregation or solid phase enzyme reaction). (sidasante.com)
Allergic reaction3
- 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)
- Care must be exercised to inject intradermally, as deeper, subcutaneous injections will prevent proper interpretation and intravenous injection could result in a dangerous allergic reaction. (nielsenbio.com)
- The patient should be observed for approximately half an hour in case of an allergic reaction. (nielsenbio.com)
Hypersensitivity2
- 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)
- Immediate hypersensitivity local reactions can include itching, swelling, pain and blistering at the test site occurring 15-20 minutes after administration. (nielsenbio.com)
Adverse reactions1
- For this reason, large doses of levodopa are required for adequate therapeutic effect, and these may often be accompanied by nausea and other adverse reactions, some of which are attributable to dopamine formed in extracerebral tissues. (nih.gov)
Tests4
- Tests based on interferon- (IFN-) expression in or other infections often have false-negative reactions ( 7 ). (cdc.gov)
- 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 . (vectorsjournal.org)
- Two tests came back negative, two came back positive. (vectorsjournal.org)
- Of these 19, 11 contained only chrysotile, indicating false negative magnesium tests. (cdc.gov)
Bacteria4
- The dimethomorph (Acrobat), systemic fungicide, caused complete inhibition of band development of DNA extracted from either potato brown rot or potato ring rot bacteria which may be considered as false negative reaction(s). (scialert.net)
- The dimethomorph (Acrobat) fungicide caused false negative effect with both organisms under study followed by dithiocarbamate (Diathane) fungicide in case of ring rot bacteria. (scialert.net)
- A negative reaction usually means you have never been infected with the bacteria that cause TB. (medlineplus.gov)
- A few people infected with the bacteria that cause TB may not have a reaction. (medlineplus.gov)
Systemic1
- Systemic reactions to CANDIN have not been observed, however all foreign antigens have the remote possibility of causing Type 1 anaphylaxis and even death when injected intradermally. (nielsenbio.com)
Reagent1
- Urobilinogen: This test is based on the Ehrlich reaction The reagent area may react with interfering substances known to react with Ehrlich's reagent. (accurexbiomedical.com)
Immune2
- Also, diseases or medicines that weaken the immune system may cause a false-negative result. (medlineplus.gov)
- They are associated mainly with allergic reactions ( when the immune system overreacts to environmental antigens such as pollen or pet dander ) and parasitic infections. (capitalaai.com)
Medications1
- Personnel, equipment, and medications needed to treat such reactions should be immediately available including 1:1000 epinephrine for injection. (nielsenbio.com)
Interpretation1
- The authors conclude that, due to the difficulties inherent in interpretation of color reactions in the K2 test, the hazardous nature of the reagents used, and the lack of precision in the hands of untrained personnel working in the field, the K2 test cannot be recommended for use by school district personnel. (cdc.gov)
Symptoms1
- After onset of symptoms during travel, she was first tested negative for malaria, most probably by RDT, at a local hospital in Harar, Ethiopia. (bvsalud.org)
High4
- There was a slight numerical advantage in PFS and ORR for gefitinib over carboplatin/paclitaxel in the cfDNA EGFR mutation-negative subgroup, likely due to the high rate of false negatives within this subgroup. (nih.gov)
- and TST positive, QFT-IT nega- for improving management of children at high risk, most tive if in contact with TB-negative persons or controls. (cdc.gov)
- The presence of cephalexin, cephalothin, tetracycline may cause decreased reactivity, and high levels of the drug may cause a false negative reaction. (accurexbiomedical.com)
- 1.4mmolL and/or high Ketone concentrations (8mmoVL) may cause false negatives for specimens containing small amounts of glucose (5.5mmolL). (accurexbiomedical.com)
Rate1
- Poor technique in nasopharyngeal molecular testing may erroneously convert this test to a simple nasal swab with upwards of a 37% false negative rate.³. (nysna.org)
Injection1
- The injection site of a positive reaction will develop over 24-48 hours resulting in an area of redness accompanied by a smaller palpable area of swelling or induration. (nielsenbio.com)
Specific2
- Glucose: The test is based on the specific glucose oxidase/peroxidase reaction. (accurexbiomedical.com)
- I became aware that there were times when negative moods were actually not real feelings at all, but "false moods" caused by negative reactions to specific foods or other lifestyle factors. (moodhealing.com)
Present1
- The residues of disinfectants containing quaternary ammonium groups or chlorohexidine are present in the urine vessel maybe lead to a false positive result. (accurexbiomedical.com)
Skin3
- With a negative reaction, the skin where you received the PPD test is not swollen, or the swelling is very small. (medlineplus.gov)
- Intrademal ( ID ) is ordered to ensure that false-negative skin prick test reactions are not missed. (capitalaai.com)
- ID testing is done only for allergens that were negative during skin prick testing. (capitalaai.com)
Result2
- People who were born outside the United States who have had a vaccine called BCG may have a false-positive test result. (medlineplus.gov)
- A negative result does not in itself prove that there is no significant bacteriuria. (accurexbiomedical.com)
Control1
- Briefly, 1 mL of blood was drawn culture (Becton Dickinson, Sparks, MD, USA) were con- into vacutainer (Becton Dickinson) tubes coated with either ducted by trained staff at Zankli TB Research Laboratory saline (negative control tube) or ESAT-6, CFP-10, and TB in Abuja. (cdc.gov)
Sensitive1
- These test are sensitive to the climate of developing countries, they exhibit strong variations in quality from lot to lot and are susceptible to over-exposure, thus causing false positive reactions. (sidasante.com)
Area1
- Your provider will check the area to see if you have had a strong reaction to the test. (medlineplus.gov)
Case1
- The false negative multiplex-PCR is being evident only in case of R. solanacearum under the stress of both propamocarb carbamate (Previcur N) fungicide and on the organophosphate (Malthion) insecticide. (scialert.net)
Site1
- In people with no known risks of TB, 15 mm or more of firm swelling at the site indicates a positive reaction. (medlineplus.gov)
People1
- This was literally a revelation to me, and teasing out whether feelings are "real" and based in feelings, or "false" and rooted in food choices, is some of the most important work I do with people every day. (moodhealing.com)
