RESUMEN
<p><b>OBJECTIVE</b>To examine the HIV prevalence and associated risk factors among men who have sex with men (MSM) in the Pearl River Delta (PRD) region, in order to provide scientific basis for assessment on HIV prevention programs.</p><p><b>METHODS</b>Surveillance projects on HIV infection status and risk factors were carried out among MSM in six prefectural PRD cities, based on the national sentinel surveillance program among MSM.</p><p><b>RESULTS</b>A total of 8 770 MSM were recruited in the six PRD prefectural cities from 2009 to 2013. The overall prevalence rates of HIV among MSM during 2009 and 2013 were 4.7% , 9.7% , 10.6% , 12.9% and 11.4% , respectively, appeared an increasing trend. HIV related high-risk behaviors were commonly seen among MSM. The proportion of consistent condom use during anal sex in the last six months was 46.3%. Associated risk factors for HIV infection among MSM would include older age, being non-permenant residents, inconsistent condom use, history of having had sexually transmitted diseases and without having received intervention services in the last year.</p><p><b>CONCLUSION</b>High-risk behaviors were popular in the MSM population that causing the HIV transmission to expand among the MSM population in the major region of PRD. It seemed necessary to reinforce the publicity and education programs as well as effective behavior intervening measures among the MSM group.</p>