Abstract

National surveillance for newly diagnosed HIV infection indicates an increasing trend in Queensland, South Australia and Victoria but not in New South Wales. It was not clear if trends in newly diagnosed HIV infection were due to different patterns of HIV antibody testing. We report the pattern of HIV antibody testing among people seen through a network of sexual health clinics in Australia.

Six public metropolitan sexual health clinics (Sydney Sexual Health Centre (SSHC), South West Sexual Health Centre (SSWSHC), NSW; Brisbane Sexual Health Clinic (BSHC), Gold Coast Sexual Health Clinic (GCSHC), QLD; Clinic 275, SA; Melbourne Sexual Health Centre (MSHC), VIC) provide annual tabulations of the number of people seen, the number tested for HIV antibody, and the number with newly diagnosed HIV infection, broken down by sex, exposure category and testing history.

The number of men seen at the clinics ranged from 17 138 in 1996 to 19 184 in 2005. Among men seen, the percentage who were tested for HIV declined from 62% in 1996 to 50% in 2001 and increased to 56% in 2005. HIV prevalence remained stable in 1996-2005 at 0.5% and was highest at SSHC (0.7-1.1%) and among homosexually active men (1.8% in 1996 and 1.6% in 2005). The percentage of men retested within 12 months of a negative test increased from 41% in 1996 to 44% in 2005. At SSHC, retesting among homosexually active men declined from 56% in 1996 to 44% in 2001 and increased to 58% by 2005. At Clinic 275 and MSHC, 50-60% and around 50% of homosexually active men were retested in 1996 - 2005 and in 2004-2005, respectively. HIV infection was newly diagnosed in 0.4% (8) in 1996 and in 0.8% (26) in 2005.

While HIV antibody testing patterns vary between the clinics, incidence of newly diagnosed HIV infection has remained low.