HIV exposure in the city of Houston.

Demographic characteristics and risk factor data for 76,672 clients were studied to characterize the distribution of infection with human immunodeficiency virus (HIV) and the use of counseling and testing facilities in Houston, Tex. The number of clients who received free, voluntary HIV counseling and testing services between January 1990 and December 1992 doubled, while the seroprevalence rate declined from 6.1% to 2.9%. Rates were highest for white males, clients attending freestanding HIV testing sites, and those reporting male-to-male sexual contact. The number of females testing positive had increased by 67% over time and consisted almost entirely of blacks. Only 57% of clients who were tested returned for test results and received posttest counseling. Among those who were HIV negative, high-risk behaviors were frequently reported. Behavioral change must be reinforced, and priority must be given to contacting both seropositive and high-risk clients who seek testing.