Optimising sexually transmitted infection screening in correctional facilities: San Francisco, 2003–5

Objectives: Sexually transmitted infection (STI) screening in correctional facilities provides access to people at high risk for STIs who might not be screened elsewhere. These screening programmes are becoming more widespread, but with decreasing funding for STI control, maximising screening impact has become increasingly important. We aimed to make recommendations about the impact of age and sex targeted screening in correctional facilities. Methods: We compared the prevalence of chlamydia and gonorrhoea for January 2003–July 2005 among different age groups of females and males screened in San Francisco correctional facilities—youth detention (12–17 years) and adult jail (18–35 years). Results: 16 975 chlamydia tests and 13 443 gonorrhoea tests were performed. The age specific chlamydia test positivity among females aged 12–17 years, 18–25 years, and 26–30 years, respectively, was 9.6% (105/1092), 9.4% (196/2088), and 6.3% (40/639), compared with 3.3% (100/3065), 6.2% (400/6470), and 3.9% (118/3046) among males. The age specific gonorrhoea test positivity among females in these same age groups was 3.2% (34/1062), 2.7% (57/2082), and 2.4% (15/635), compared with 0.7% (7/1026), 1.2% (67/5507), and 1.0% (25/2555) among males. Of the 1198 STIs identified, 1020 (85.1%) were treated. Conclusions: On the basis of this report and national data, STI control programmes with limited funds should prioritise screening females in youth detention first, women aged ⩽30 years in adult jail second, and men aged ⩽25 years in adult jail third. Males in youth detention should have a lower priority than young adults in jails.