To the Editor: Australia has been successful so far in maintaining a low prevalence of HIV infection among injecting drug users (IDUs). This has been achieved by adopting a harm-reduction approach to the prevention of bloodborne virus transmission, including needle and syringe programs, methadone maintenance and peer-education. Sharing of needles and syringes has declined markedly: cross-sectional surveys among users of needle and syringe programs across Australia have shown a decrease in the prevalence of reported sharing from 31% in 1995 to 15% in 1997.1

However, there is evidence that among some subpopulations, especially those of Indo-Chinese origin, unsafe injecting practices remain common. In a survey of Indo-Chinese IDUs in Sydney and Melbourne, Maher et al reported that 22% of those surveyed had shared needles and syringes in the preceding month.1 Although the Indo-Chinese community is becoming increasingly aware of issues related to drug use, IDUs are under-represented in drug treatment programs.3 There is also evidence that parents send their children back to their country of origin to escape the Australian heroin scene. In a Melbourne survey of Vietnamese IDUs, Kelsall et al reported that 19% of their sample (38 of 200) had returned to Vietnam during the previous five years for drug-related reasons. Of these, 24 reported using heroin in Vietnam, a disturbing finding given that HIV prevalence among IDUs in parts of Vietnam is greater than 50%.4

We analysed HIV surveillance data in Victoria to investigate whether there was an over-representation of Indo-Chinese-born IDUs. Country of birth has been collected as part of HIV notification in Victoria since January 1996. Since then, there have been 38 notifications of HIV infection in individuals reporting intravenous drug use as a risk factor. Of these 38, 11 (29%; 95% CI, 15%–46%) reported an Indo-Chinese country of birth — a higher proportion than expected given the 1996 census finding that 1.5% of Victoria's population was born in an Indo-Chinese country.5 These 11, all men, were significantly younger than other IDUs notified in this time (mean, 23.3 years v 31.3 years, respectively; P < 0.05).

Although these numbers are small, they highlight a group at increased risk of HIV who are not currently being effectively reached by prevention services. These data also suggest a hidden route for spread of HIV from Asia into the Australian community. There is an urgent need to provide culturally relevant education and harm-reduction programs to prevent transmission of HIV within this group. The Victorian Department of Human Services is allocating additional resources to working with culturally and linguistically diverse communities on prevention activities to address this issue.