False positive reactions in confirmatory tests for syphilis in presence of antiphospholipid antibodies: misdiagnosis with prognostic and social consequences

2006 ◽  
Vol 12 (4) ◽  
Author(s):  
Gabriela de Larrañaga ◽  
Luis Trombetta ◽  
Silvia Perés Wingeyer ◽  
Graciela Remondino
Keyword(s):  
False Positive ◽  
Antiphospholipid Antibodies ◽  
Social Consequences ◽  
False Positive Reactions ◽  
Confirmatory Tests

False-Positive Coagulase Reactions in the Characterization of Microorganisms Isolated from Foods

1968 ◽  
Vol 51 (1) ◽  
pp. 1-3
Author(s):  
Claudia J Litkenhous ◽  
Edward F Baer ◽  
Mildred M Gilden ◽  
Marcia B Bromer
Keyword(s):  
False Positive ◽  
Rabbit Plasma ◽  
Clotting Time ◽  
False Positive Reactions ◽  
Confirmatory Tests

Abstract From 3578 cultures tested for coagulase production, 66 suspected false-positive coagulase cultures were selected on the basis of delayed clotting time (3—4 hr). Coagulase production by these cultures was compared, using citrated rabbit plasma and citrated rabbit plasma containing heparin. Twentynine of these cultures were also tested, using plasma containing EDTA. Results indicate that either EDTA or heparin should be used in conjunction with citrated plasma to eliminate false-positive reactions, or, if citrated plasma is used, that all delayed positives (3—4 hr) be considered suspect and additional confirmatory tests be performed

scholarly journals Patch testing with aluminium Finn Chambers could give false positive reactions in patients with contact allergy to aluminium

2021 ◽  
Author(s):  
Lisbeth Rosholm Comstedt ◽  
Jakob Dahlin ◽  
Magnus Bruze ◽  
Youlanda Hedberg ◽  
Mihály Matura ◽  
...  
Keyword(s):  
Patch Testing ◽  
False Positive ◽  
Contact Allergy ◽  
False Positive Reactions

scholarly journals False Positive Reactions in Treponemal Tests

1963 ◽  
Vol 39 (1) ◽  
pp. 30-32
Author(s):  
A. J. Julian ◽  
J. Portnoy ◽  
T. L. H. N. Bossak
Keyword(s):  
False Positive ◽  
False Positive Reactions

scholarly journals False-Positive Reactions Against HLA Class II Molecules Detected in Luminex Single-Antigen Bead Assays

2014 ◽  
Vol 34 (5) ◽  
pp. 408-410 ◽  
Author(s):  
Ji Won In ◽  
Eun Youn Rho ◽  
Sue Shin ◽  
Kyoung Un Park ◽  
Eun Young Song
Keyword(s):  
False Positive ◽  
Class Ii ◽  
Hla Class Ii ◽  
False Positive Reactions ◽  
Single Antigen ◽  
Hla Class Ii Molecules

DIAGNOSIS OF HISTOPLASMOSIS USING PRECIPITIN REACTIONS IN AGAR GEL

PEDIATRICS ◽  
1958 ◽  
Vol 22 (4) ◽  
pp. 616-627
Author(s):  
Douglas C. Heiner
Keyword(s):  
Sensitivity And Specificity ◽  
Constrictive Pericarditis ◽  
False Positive ◽  
Agar Gel ◽  
Presumptive Diagnosis ◽  
Acute Pericarditis ◽  
Cross Reactions ◽  
False Positive Reactions ◽  
Large Numbers ◽  
Immunologic Test

An easy-to-perform immunologic test for histoplasmosis is described. The test, involving precipitin reactions in agar gel, appears to have greater sensitivity and specificity than currently available tests for histoplasmosis. It is useful in the study of small or large numbers of patients. It has been possible to demonstrate at least one antigen common to H. capsulatum, B. dermatitidis, and C. immitis. This antigen may be responsible for cross reactions. Instances are cited wherein problems of cross reactions and false-positive reactions have been clarified by means of precipitin-in-gel studies. Precipitin reactions in agar have provided presumptive diagnosis of histoplasmosis in a patient with acute pericarditis, which rapidly progressed to constrictive pericarditis necessitating pericardiectomy.

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