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Recurrent anaphylaxis highlighting methodological variability and diagnostic challenges in the basophil activation test: a case report. [PDF]

JA Clin Rep
Okutomi K, Sugiyama Y, Nitta A, Kimizuka M, Yamakage M.   +4 more
europepmc   +1 more source

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Frequency of False-Negative Reactions to the Fragrance Mix

Contact Dermatitis, 1993
To estimate the frequency of false‐negative‐ reactions to the fragrance mix, the 8 constituents of the mix in concentrations of 5% (2% for cinnamic aldehyde) were added to the European standard series for routine testing. Patients with positive reactions to individual ingredients in the absence of a reaction to the mix were retested with serial ...
Derk P Bruynzeel, Th van Joost, S Pavel
exaly   +3 more sources

False-Negative Oxidase Reaction as a Result of Medium Acidification

Antonie Van Leeuwenhoek, 1980
Acidification of the culture medium may lead to a false-negative result of the oxidase reaction. Hence, if the medium contained a carbon source or another component that is convertible to acid, a negative oxidase reaction should be considered inconclusive.
Arie H Havelaar, W A Scheffers
exaly   +4 more sources

False Negative Histochemical Reaction for Myophosphorylase Activity in Fulminant Sepsis Due to Methicillin Resistant Staphylococcus aureus

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.
Lili Miles, Kevin E Bove, M Cristina Pacheco   +2 more
exaly   +3 more sources

False-Negative Reactions of the “Hemoccult” Slide Test

New England Journal of Medicine, 1978
K L, Cohen, E J, Luminati
exaly   +3 more sources