"Street medicine": Collaborating with a faith-based organization to screen at-risk youths for sexually transmitted diseases.

Chlamydia and gonorrhea rates among African American youths in San Francisco are far higher than those among young people of the city's other racial and ethnic groups. A geographically targeted sexually transmitted disease education and screening intervention performed in collaboration with a local faith-based organization was able to screen hundreds of at-risk youths. The screened individuals included friends and sex partners from an extensive social-sexual network that transcended the boundaries of the target population. The intervention also provided an excellent opportunity to practice "street medicine," in which all screening and treatment was effectively conducted in the field.