Table 1

Characteristics and laboratory results for male sexual couples concordantly infected with early syphilis

Couple number	Partner number	HIV status	RPR	EIA IgM	Tp PCR	Stage	Symptoms
1	1	−	32	Reactive		EL
1	2	+	32	Not done		EL
2	1	−	16	Non-reactive	+	P	Penile ulcers
2	2	−	64	Non-reactive		S	Palmar rash
3	1	−	64	Reactive	+	P	Penile ulcers
3	2	−	4	Non-reactive		EL
4	1	−	4	Reactive	−	P	Penile ulcers
4	2	−	4	Reactive	+	P	Anal lesion
5	1	−	0	Not done	+	P	Penile ulcers
5	2	−	64	Reactive		S	Generalised rash, penile lesions
6	1	−	16	Reactive		S	Generalised rash
6	2	−	0	Not done		EL
7	1	−	16	Non-reactive		EL
7	2	+	128	Reactive		EL
8	1	−	64	Non-reactive	+	EL
8	2	+	128	Non-reactive		EL
9	1	−	32	Reactive		S	Generalised rash
9	2	−	8	Equivocal		EL
10	1	+	32	Reactive		S	Generalised rash
10	2	−	0	Not done		EL
11	1	−	128	Reactive		S	Generalised rash
11	2	−	128	Reactive		S	Alopecia
12	1	−	64	Reactive	−	S	Generalised rash
12	2	−	16	Reactive		EL
13	1	−	32	Reactive	+	S	Anal condyloma, generalised rash
13	2	+	16	Reactive	+	S	Anal condyloma, penile ulcers

EIA IgM, ELISA immunoassay IgM; EL, early latent syphilis; P, primary syphilis; RPR, rapid plasma reagin; S, secondary syphilis; Tp PCR, Treponema pallidum PCR.