Excessive hemolysis, gross contamination of specimen, chylous serum, improper storage of specimen, inappropriate specimen container, insufficient specimen volume.
1 mL blood (0.2 mL serum)
LIMITATIONS OF TEST:
The assay may fail to detect antibodies in approximately 30% of patients with early primary syphilis and in 5% of sera from patients with late syphilis.
Gelatin particle agglutination
The assay, which confirms the presence of antibodies to the pathogenic strain of Treponema pallidum, is used to diagnose syphilis. It is NOT recommended as a screening test for syphilis. The assay should NOT be used to follow treatment or establish reinfection since treponemal antibody tests can remain reactive for the life of treated patients. Patients from whom reactive results are obtained are reported to the City of Chicago Board of Health. This is mandated by law.