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Objectives To describe trends in HIV diagnoses among men who have sex with men (MSM) in New Zealand 1996–2008, and to identify characteristics associated with HIV diagnoses in the resurgent phase.

Data collected through routine surveillance of HIV infection, where the mode of transmission included homosexual contact, were analysed over the period 1996–2008.

Annual HIV diagnoses were low during 1996–2000, rose sharply between 2001 and 2005, and remained at an elevated plateau between 2006 and 2008. Over a quarter were attributed to HIV infection acquired overseas (28.6%). Trends in diagnoses of locally acquired HIV infection closely mirrored the trend of three diagnosis phases. Increases in locally acquired HIV occurred among virtually all characteristics of MSM. However, compared with MSM diagnosed in the low phase 1996–2000, individuals diagnosed in the resurgent …