False Positive Reactions in Treponemal Tests

False-positive reactions in the rapid plasma reagin-card, fluorescent treponemal antibody-absorbed, and hemagglutination treponemal syphilis serology tests.

Sera from 628 nonsyphilitic individuals were tested with the Rapid Plasma Reagin-Card, Fluorescent Treponemal Antibody-Absorbed, and Hemagglutination Treponemal Test for Syphilis tests to ascertain the comparative specificity of these tests. Many sera were also tested with the quantitative Venereal Disease Research Laboratory test. Sera included in the study were from both normal individuals an...

Frequency of false positive responses in patients with multiple positive reactions in patch test

Background and aim: Contact dermatitis is an inflammatory skin response due to contact with environmental materials manifested as acute or chronic eczema. Patch test is the standard test to recognize responsible allergen. The objective of this study was to evaluate the frequency of false positive patch test responses in patients with Exited Skin Syndrome (ESS).Materials...

Biological false positive Wassermann reactions in Uganda.

In a country like Uganda where syphilis is common, yaws occurs, and many of the diseases known to cause false positive Wassermann reactions (such as malaria, leprosy, relapsing fever, smallpox vaccination, trypanosomiasis, lymphogranuloma venereum, and infectious hepatitis) exist, it seemed desirable to obtain some background information about the frequency of positive serological tests for syp...

Chronic biological false-positive reactions to serological tests for syphilis in blood donors.

Problem sera from 375 blood donors were investigated for biological false-positive reactions to serological tests for syphilis. Problem sera are those sera in which submitting laboratories have found a reactive result to a screening test for syphilis. On each serum a cardiolipin Wassermann reaction, a Venereal Disease Research Laboratory test, a Reiter protein-complement fixation test, a Trepon...

Serological tests for syphilis in pregnancy. False and missed positive reactions.