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HIV Infection in South Australia: QSR 1999 No. 14

HIV Infection 1985 - 31/12/99

There have been 738 individuals diagnosed with HIV infection, 675 (91%) males and 63 (9%) females. Of the males, 514 (76%) reported male-to-male sexual contact, 55 (8%) reported injecting drug use and 28 (4%) reported both risk factors. Heterosexual transmission was reported by 33 (52%) females and injecting drug use was reported by 23 (37%) females diagnosed with HIV infection (Table 1.1).

HIV Infection 01/10/99 - 31/12/99

Five males were diagnosed with HIV infection during the fourth quarter. Of two men who identified as heterosexual, one originated from a country where HIV is transmitted predominantly by heterosexual contact, and the other recently returned from Thailand where he had been living for the past 18 months. Three males reported male-to-male sexual contact. (Table 1.3).

Laboratory Screening For HIV Infection 01/10/99 - 31/12/99

During the fourth quarter of 1999, 20501 screening tests were performed, 9682 (47%) on males, 10729 (52%) on females and 90 tests on individuals whose sex was unknown (Table 1.4).

Table 1.1 HIV infection detected in South Australia, 1985 - 31/12/99. Exposure category by sex.

Exposure category	Male		Female		Total
	No.	%	No.	%	No.	%
Homosexual contact	514	76	na		514	69
Homosexual contact/IDU	28	4	na		28	4
Heterosexual contact	38	6	33	52	71	10
IDU	55	8	23	37	78	11
Blood products	7	1	2	3	9	1
Other	4	1	3	5	7	1
Unknown	29	4	2	3	31	4
Total	675		63			738

Table 1.2: HIV infection detected in South Australia, 01/10/99 - 31/12/99 and year to date.
Exposure category by sex.
Exposure category	4th Quarter 01/10/99 - 31/12/99		Year to date 01/01/99 - 31/12/99
	Male	Female	Male	Female
Homosexual contact	3	-	10	-
Heterosexual/IDU	2	-	6	3
Heterosexual contact	-	-	3	-
Total	5	0	19	3

Table 1.3 HIV infection detected in South Australia, 01/10/99 - 31/12/99
and year to date. Testing history by age at diagnosis.

Testing history	4th Quarter 01/10/99 - 31/12/99			Year to date 01/01/99 - 31/12/99
	Age (years)			Age (years)
	<25	25 - 39	³40	<25	25 - 39	³40	Total
No previous test	1	-	-	1	4	4	9
Negative < 12 months	1	1	-	1	3	2	6
Negative > 12 months	-	1	-	-	2	1	3
Known positive overseas	-	1	-	-	2	-	2
Unknown	-	-	-	-	2	-	2
Total	2	3	-	2	13	7	22

**Table 1.4 Summary of HIV antibody tests, 01/10/99 - 31/12/99 and year to date. Laboratory by sex.**
Laboratory	4th Quarter 01/10/99 - 31/12/99			Year to date 01/01/99 - 31/12/99
	Male	Female	Unknown	Male	Female	Unknown	Total
Public	4945	5622	90	20171	24317	354	44842
Private	4737	5107	-	15759	16386	-	32145
Total	9682	10729	90	35930	40703	354	76987

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