AIDS and tuberculosis/leprosy in Nigeria: the urbanisation factor.

A study was conducted between February and June 1994 on the influence of urbanisation on the seroprevalence of human immunodeficiency virus (HIV) amongst tuberculosis (TB) and leprosy patients in the 4 Primary Health Care Zones in Nigeria. Results indicate that 71.4% of all smear positive TB patients and 75% of all multibacillary (MB) leprosy patients that are HIV seropositive in this study are resident in the urban areas. This study emphasizes the need for careful sample selection in studies involving HIV and tuberculosis/leprosy, and for careful monitoring of the HIV/leprosy interactions.