What is the HIV status of the source individual?

Provision of PEP should not be delayed while establishing the source status.

Ideally, active attempts should be made to contact the source and ask them to have an urgent HIV test; however, the often anonymous nature of exposures makes this impractical.

Therefore:

Table 2. HIV seroprevalence in Australian populations

See Literature Review1 section HIV status of the source individual for further information.

Community group HIV seroprevalence (%) Estimated risk of HIV
transmission/exposure*
Men who have sex with men (MSM)8-13
  • ACT
  • Adelaide
  • Queensland
  • Melbourne
  • Perth
  • Sydney
Actual seroprevalence may be higher than reported seroprevalence14
8.3
7.4
11.2
9.5
4.2
8.5
People who inject drugs in Australia15
  • MSM
  • all others

30.0
0.5
Heterosexuals in Australia16
  • new blood donors (% donations)
  • sexual health clinic attendees

<0.003
<0.5
Female commercial sex workers (Australia)15  <0.1
Overall Australian seroprevalence15 0.14

HIV seroprevalence in overseas populations

The seroprevalence overseas varies widely, with a High Prevalence Country (HPC) being defined as having a prevalence of >1% in the general population. However, variance is not only between countries but also in different risk groups. Highest seroprevalence is in Southern Africa (up to 26%) and in people who inject drugs in South East Asia (up to 40% in Thailand and Indonesia). For seroprevalence for individual countries go to http://aidsinfo.unaids.org/

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