Inconclusive Syphilis Results: A Retrospective Review of Public Health Results

Table 1

Inconclusive results and interpretations.

Test		Interpretations
Treponemal			Nontreponemal
EIA (screen)	TPPA (confirmatory)		RPR (confirmatory)
Reactive	Nonreactive	Indeterminate	(i) New infection; (ii) Older untreated infection; (iii) Older treated infection; (iv) Other nonvenereal treponemal infection; (v) False positive
Reactive	Reactive (with titre)	Nonreactive