Table 1. Characteristics of patients and virus detection results.

	Homosexual men	Heterosexual men	All men
No. of patients	29	25	54
Mean age (range)	42.4 (32–66)	37.8 (29–46)	40.1
Origin *	Dutch: 21Non-Dutch: 2Unknown: 6	Dutch: 18Non-Dutch: 7	Dutch: 39 (72%)Non-Dutch: 9 (17%)Unknown: 6 (11%)
No. of seminal samples tested	30	63	93
Blood plasma HIV-1>50 copies/ml	28/30	5/63	33/93 (35%)
Seminal plasma HIV-1>50 copies/ml	20/30	3/63	23/93 (25%)
XMRV+	0/30	0/63	0/93 (0%)

*All men are currently living in The Netherlands.