Table 1.

Distribution of HIV-1 Subtypes by Age, Gender, Route of Infection, Place of Presumed Infection, and Year of Diagnosis in Bulgaria

	Subtype A		Subtype B		Subtype other		Subtype unclassified		Total
	(N = 18)	(%)	(N = 41)	(%)	(N = 21)	(%)	(N = 3)	(%)	83
Age (in years)
≤38	10	25	21	52.5	8	20	1	2.5	40
>38	8	18.6	20	46.5	13	30	2	4.9	43
Gender
Male	8	14.5	34	61.8	12	21.8	1	1.9	55
Female	10	35.7	7	25	9	32.1	2	7.2	28
Route of infection
Sexual	15	22.1	31	45.6	19	27.9	3	4.4	68
Vertical	1	50.0	None		1	50.0	None		2
MSM	None		5	100	None		None		5
Blood	2	30.0	3	50	1	20	None		6
IDUs	None		2	100	None		None		2
Presumed place of infection
Bulgaria	15	22.1	35	51.5	16	23.5	2	2.9	68
Other	3	20.0	6	40.0	5	33.3	1	6.7	15
Distribution by year of presumed infection
1986–1995	1	5.3	8	42.1	8	42.1	2	10.5	19
1996–2000	7	28	11	44	7	28	None		25
>2001	10	25.6	22	56.4	6	15.4	1	2.6	39