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Medical male circumcision has been shown to reduce the risk of heterosexual transmission of HIV infection in men by up to 60% in three randomised controlled trials. However, not much anthropological literature exists to provide a holistic understanding of sexual behaviour among migrating fishermen who have been circumcised. This qualitative study used cultural ecology theory and anthropological methods to develop a more holistic understanding of Luo fishermen's sexual behaviour after circumcision when they migrate (wimbo) to islands in western Kenya. Results from focus-group discussions show that during wimbo there is a deviation from community norms governing sexual expression, influenced by the belief that circumcision provides protection against HIV infection. Through the exchange of sex for fish, circumcised men access new sexual partners in the destination beaches and engage in risky sexual behaviours without any HIV prevention measures. The processes and practices associated with wimbo may therefore help explain why rates of HIV infection are increasing among fisherfolk despite new interventions to combat HIV. These results have relevant implications for HIV-related intervention and policy in sub-Saharan Africa.

Urban and rural areas have distinctive health problems, which require consideration. To examine sociocultural features of cholera and its community context, a semi-structured explanatory model interview based on vignettes depicting typical clinical features of cholera was used to interview 379 urban and rural respondents in Western Kenya. Findings included common and distinctive urban and rural ideas about cholera, and its prevention and treatment. The three most commonly perceived causes among urban and rural respondents collectively were drinking contaminated water, living in a dirty environment and lacking latrines. However, a dirty environment and flies were more prominently perceived causes among urban respondents. Rural respondents were less likely to identify additional symptoms and more likely to identify biomedically irrelevant perceived causes of cholera. Oral rehydration therapy was the most frequently reported home treatment. Health facilities were recommended unanimously at both sites. For prevention, rural respondents were more likely to suggest medicines, and urban respondents were more likely to suggest health education and clean food. Findings indicate community priority, demand for and potential effectiveness of enhanced efforts to control cholera in Western Kenya, and they suggest strategies that are particularly well suited for control of cholera in urban and rural areas.