Table 2.

TP-DNA Detection in Peripheral Blood, Throat and Anal Swabs and Urine, by Syphilis Stage, in MSM with Early Syphilis, Amsterdam, The Netherlands, November 2018 to December 2019

	Syphilis Stage
	No Syphilis (n = 27)		Primary (n = 70)		Secondary (n = 73)		Early Latent (n = 86)		Late Syphilis (n = 14)		Treated Syphilis (n = 23)
	n	%	n	%	n	%	n	%	n	%	n	%
Anatomical location
Peripheral blood	0	0%	2	3%	15	21%	5	6%	0	0%	0	0%
Throat	0	0%	7	10%	47	64%	21	24%	0	0%	0	0%
Anus	0	0%	13	19%	37	51%	11	13%	0	0%	0	0%
Urine	0	0%	24	34%	26	36%	6	7%	0	0%	0	0%
No. of locations positive
0	27	100%	35	50%	11	15%	57	66%	14	100%	23	100%
1	0	0%	28	40%	23	32%	20	23%	0	0%	0	0%
2	0	0%	4	6%	21	29%	6	7%	0	0%	0	0%
3	0	0%	2	3%	12	16%	1	1%	0	0%	0	0%
4	0	0%	1	1%	6	8%	2	2%	0	0%	0	0%
≥1 location positive	0	0%	35	50%	62	85%	29	34%	0	0%	0	0%

Abbreviations: MSM, men who have sex with men; No., number; TP-DNA, Treponema pallidum DNA.