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Pamphlet
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HIV Infection in South Australia

HIV Infection 1985 - 30/09/03

In South Australia, 869 individuals have been diagnosed with HIV infection, 786 (90%) males and 83 (10%) females. Of the males, 600 (76%) reported male-to-male sexual contact, 60 (7%) reported injecting drug use and 35 (4%) reported both risk factors. Heterosexual transmission was reported by 51 (62%) females diagnosed with HIV infection, 26 (31%) females reported injecting drug use (Table 1.1).

HIV Infection 01/07/03 - 30/09/03

Fifteen males were diagnosed with HIV infection during the third quarter. Eight men reported male-to-male sexual contact as their risk factor, two reported male-to-male sexual contact and injecting drug use as their risk factor and two men reported injecting drug use as their risk factor (Table 1.2).

Newly acquired infections

Of the fifteen males diagnosed during the third quarter, seven had acquired their infection in the preceding 12 months. Six of the seven men reported male-to-male sexual contact as their risk factor (Table 1.3). Anonymous male-to-male sexual contact was reported by the majority of men who had newly HIV infection.

Newly acquired cases are infections acquired in the last 12 months, and are identified by negative serology in the preceding 12 months or diagnosed seroconversion illness in the preceding 12 months.

Laboratory Screening For HIV Infection 01/07/03 - 30/09/03

During the third quarter of 2003, 20049 screening tests were performed, 8801 (42%) on males, 11665 (57%) on females and 24 tests on individuals whose sex was not stated (Table 1.5).

Table 1.1 HIV infection detected in South Australia, 1985 - 30/09/2003.
Exposure category by sex.

Exposure category	Male		Female		Total
Exposure category	No.	%	No.	%	No.	%
Homosexual contact	600	76	na	-	600	69
Homosexual contact/IDU	35	4	na	-	35	4
Heterosexual contact	50	6	51	62	101	11
IDU	60	7	26	31	86	10
Blood products	7	1	2	2	9	1
Other	4	1	3	4	7	1
Unknown	30	5	1	1	31	4
Total	786		83		869

^{na not applicable}

Table 1.2 HIV infection detected in South Australia, 01/07/03 - 30/09/03
and year to date. Exposure category by sex.

Exposure category	3rd Quarter 01/07/03 - 30/09/03		Year to date 01/01/03 - 30/09/03
Exposure category	Male	Female	Male	Female
Homosexual	8	na	21	na
Homosexual/IDU	2	na	2	na
Heterosexual contact	1	-	1	-
Heterosexual/IDU	2	-	2	1
Not stated	2	-	2	-
Total	15	-	28	1

^{n.a. not applicable}

Table 1.3 Newly acquired HIV infection (Incident cases*), 01/07/03 - 30/09/03
and year to date. Exposure category by sex.

	3rd Quarter 01/07/03 - 30/09/03		Year to date 01/01/03 - 30/09/03
Exposure category	Male	Female	Male	Female	Total
Homosexual	4	na	12	na	12
Homosexual/IDU	2	na	2	na	2
Heterosexual/IDU	1	-	1	-	1
Total	7	-	15	-	15

* Incident case - negative serology in the preceding 12 months or diagnosed seroconversion illness
in the preceding 12 months
na - not applicable

Table 1.4 HIV infection in males in South Australia, 01/07/03 - 30/09/03
and year to date. Case category by age at diagnosis.

Case category	3rd Quarter 01/07/03 - 30/09/03			Year to date 01/01/03 - 30/09/03
Case category	Age group (years) <25 25 - 39 ≥40			Age group (years) <25 25 - 39 ≥40
Newly acquired¹	2	2	3	2	8	5
Greater than 12 months²	-	2	1	-	3	2
Uncertain duration³	-	2	3	-	2	6
Total	2	6	7	2	13	13

1 Incident case - negative serology in the preceding 12 months or diagnosed seroconversion illness in
the preceding 12 months.

2 Infection likely to be greater than 12 months - risk behaviour confined to more than 12 months ago or
diagnosed seroconversion illness more than 12 months ago.

3 Uncertain duration- tested for the first time this year and no seroconversion illness or AIDS defining
illness present.

Table 1.5 Summary of HIV antibody tests, 01/07/03 - 30/09/03 and year to date.
Laboratory by sex.

Laboratory	3rd Quarter 01/07/03 - 30/09/03			Year to date 01/01/03 - 30/09/03
Laboratory	Male	Female	Unknown	Male	Female	Unknown	Total
Public	5624	6916	24	16133	20047	212	36392
Private	3177	4749	-	9492	14189	3	23684
Total	8801	11665	24	25625	34236	215	60076

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HIV Infection in South Australia