Fluorescent Treponemal Antibody Test. Modification Based on Quantitation (FTA-200)

Abstract
1. A modified FTA test technic designated as FTA-200 is described and recommended on the basis of results obtained by examining well-documented serum specimens from various syphilis categories and a Presumed Normal group. 2. The FTA-200 test possesses a greater degree of reproducibility than the FTA test when results were compared on duplicate serums.