Results 221 to 230 of about 144,715 (261)
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Fragrance patch tests prepared in advance may give false‐negative reactions
Contact Dermatitis, 2014SummaryBackgroundSeveral of the ingredients in fragrance mix I (FM I) have been shown to evaporate from petrolatum preparations applied in test chambers to an extent that can be suspected to affect the patch test result.ObjectivesTo compare the reactivity towards FM I and fragrance mix II (FM II) when they are applied in test chambers in advance and ...
Martin, Mowitz +3 more
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False‐negative results by polymerase chain reaction due to contamination by glove powder
Transfusion, 1992ABSTRACT: The polymerase chain reaction (PCR) technique has become an important, widely employed method for the detection and quantitation of the nucleic acid sequences used in the diagnosis and monitoring of genetic and infectious diseases. Much attention has been directed at the problem of false‐positive PCR results, which are generally attributed ...
J G, de Lomas, F J, Sunzeri, M P, Busch
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Journal of Allergy and Clinical Immunology, 1988
The reliability of a qualitative test for sulfites in foods (Sulfitest sulfite test strips) was evaluated by comparison of the results obtained from the analysis of 90 food and beverage samples to results obtained by the quantitative, modified Monier-Williams method (the preferred procedure for sulfite analysis in foods of the Food and Drug ...
J A, Nordlee, S G, Naidu, S L, Taylor
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The reliability of a qualitative test for sulfites in foods (Sulfitest sulfite test strips) was evaluated by comparison of the results obtained from the analysis of 90 food and beverage samples to results obtained by the quantitative, modified Monier-Williams method (the preferred procedure for sulfite analysis in foods of the Food and Drug ...
J A, Nordlee, S G, Naidu, S L, Taylor
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Light-Chain Proteinuria: Spurious False-Negative Reaction to Sulfosalicylic Acid
Annals of Internal Medicine, 1985Excerpt To the editor: We report the case of a patient with multiple myeloma and renal failure secondary to heavy urinary excretion of kappa light chains.
N. STANLEY NAHMAN +5 more
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False-Negative Reaction to Patch Testing With Volatile Compounds
Archives of Dermatology, 1974To the Editor.— Recent experience with two patients illustrates what appears to be a specific type of falsenegative reaction to patch testing with volatile compounds. Report of Cases Case 1.— A 27-year-old white man was seen because of a four-day history of acute eczematous dermatitis of the dorsa of the hands and volar aspects of the wrists.
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Pitfalls in Patch Testing: Minimizing the Risk of Avoidable False-Negative Reactions.
Dermatologic clinics, 2021Patch testing is the gold-standard diagnostic tool for the diagnosis of allergic contact dermatitis; unfortunately, it is a procedure with potential for errors, including false-negative reactions. Some of the factors responsible for this are likely unavoidable; however, others may potentially lie within the control of the user. Knowledge and management
Solveig, Ophaug +1 more
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[False negative reactions in the serodiagnosis of cystic echinococcosis in humans].
Immunitat und Infektion, 1985Clinically supposed cases of echinococcosis can be strongly confirmed by application of serodiagnostic techniques. In certain cases false-negative reactions have to be taken into account. This has been observed in 4 out of 51 parasitologically confirmed cases.
K, Janitschke, H, Werner, L, Thomas
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European Journal of Clinical Microbiology & Infectious Diseases, 1997
The aim of this study was to assess the presence of inhibitors in urine specimens causing false-negative results in a commercial Chlamydia trachomatis gap-filling ligase chain reaction (Gap-LCR) assay. On testing of urine samples by the Gap-LCR assay and urethral swab specimens by cell culture, 73 (19%) Chlamydia trachomatis positive subjects were ...
E S, Berg +4 more
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The aim of this study was to assess the presence of inhibitors in urine specimens causing false-negative results in a commercial Chlamydia trachomatis gap-filling ligase chain reaction (Gap-LCR) assay. On testing of urine samples by the Gap-LCR assay and urethral swab specimens by cell culture, 73 (19%) Chlamydia trachomatis positive subjects were ...
E S, Berg +4 more
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Neuromuscular Disorders, 2007
We report a false negative histochemical reaction for myophosphorylase in the case of an 11 year old with fulminant Staphylococcus aureus. Due to increased creatine kinase levels and marked myoglobinuria a muscle biopsy was performed prior to death.
M, Cristina Pacheco +2 more
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We report a false negative histochemical reaction for myophosphorylase in the case of an 11 year old with fulminant Staphylococcus aureus. Due to increased creatine kinase levels and marked myoglobinuria a muscle biopsy was performed prior to death.
M, Cristina Pacheco +2 more
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Journal of Clinical Virology, 2003
Qualitative HIV-1 proviral DNA PCR tests have three main diagnostic applications. These include direct detection of viral sequences in the pre-seroconversion window period which may be positive up to 8 days prior to the development of HIV specific antibodies; resolution of indeterminate HIV serological tests and in the diagnosis of neonates born to ...
Philip, Cunningham +5 more
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Qualitative HIV-1 proviral DNA PCR tests have three main diagnostic applications. These include direct detection of viral sequences in the pre-seroconversion window period which may be positive up to 8 days prior to the development of HIV specific antibodies; resolution of indeterminate HIV serological tests and in the diagnosis of neonates born to ...
Philip, Cunningham +5 more
openaire +2 more sources