An overview of the design, process, results and recommendations of the recent sero conversion study by the National Centre in HIV Epidemiology and Clinical Research, the Australian Research Centre in Sex, Health and Society, and the National Centre in HIV Social Research. This presentation was given at the AFAO HIV Educators Conference in May 2008.

1. Renewing the Seroconversion Study Fengyi Jin 1 , Jack Bradley 1 , Sean Slavin 2 , Jeanne Ellard 3 , Andrew Grulich 1 , Garrett Prestage 1,2 1 NCHECR, 2 ARCSHS, 3 NCHSR

6. Where did the HRE occur? 24% 10% Other 10% 13% Sex club 5% 12% Sauna 29% 36% Partner/friends’ home 33% 29% Home 3 rd /4 th wave N=20 2 nd wave N=143

7. Drug and alcohol use at the HRE 19% 26% Alcohol (>= 5 drinks)‏ - 4% Cocaine 33% 20% Crystal meth - 11% Speed 22% 21% Ecstasy 11% 13% Viagra 33% 24% Marijuana 44% 40% Amyl/poppers 3 rd /4 th wave N=20 2 nd wave N=143

8. Sexual exposure at HRE 25% 35% Receptive ejaculation 50% 29% Receptive withdrawal 10% 7% Insertive only 15% 29% No UAI N=20 N=143 3 rd /4 th wave 2 nd wave

12. Acknowledgements The authors wish to thank all the interviewers who contribute their time and effort, and participants who shared this valuable information with us. The National Centre in HIV Epidemiology and Clinical Research, the Australian Research Centre in Sex, Health and Society, and the National Centre in HIV Social Research receive funding from the Australian Department of Health and Ageing.