TABLE 2.

Effect of treatment on reactive and nonreactive plasma samples in the treponemal test for syphilis

STSa reactivity	No. (%) of treated and untreated plasma samples reactive by:
	TP-PA		EIA		FTA-ABS DS
	Untreated plasma	Treated plasma	Untreated plasma	Treated plasma	Untreated plasma	Treated plasma
Reactive	56		56		54
Reaction equal to that before treatment		55 (98)		50 (89)		52 (96)
Reaction less than that before treatment		1 (2)		6 (11)		2 (4)
Nonreactive	13		13		15
Reaction equal to that before treatment		13 (100)		13 (100)		15 (100)

^aSTS, serologic test for syphilis.