title: Prevalence and associated factors for Chlamydia trachomatis infection among undocumented immigrants in a primary care facility in Geneva, Switzerland: a cross-sectional study.
abstract: Chlamydia trachomatis infection (CTI) is the most frequent sexually transmitted infection in western countries. Its prevalence in undocumented immigrants, a rapidly growing vulnerable population, remains unknown. We aimed to document the prevalence of CTI and associated factors at the primary health care level. This cross-sectional study included all undocumented immigrants attending a health care facility in Geneva, Switzerland. Participants completed a questionnaire and were tested for CTI by PCR assay. Three-hundred thirteen undocumented immigrants (68.4% female, mean age 32.4 (SD 8) years) agreed to participate. CTI prevalence was 5.8% (95% CI 3.3-8.4). Factors associated with higher prevalence were age ≤25 (OR 3.9, 95% CI 1.3-12.2) and having had two or more sexual partners during the precedent year (OR 4.5, 95% CI 1.5-13.7). Prevalence and associated factors for infection in this vulnerable population were comparable with other populations in Western countries. Our findings support the importance of facilitating access to existing screening opportunities in particular to individuals at higher risk.
authors.affiliation: Department of Community Medicine and Primary Care, Geneva University Hospitals, Geneva, Switzerland. yves.jackson@hcuge.ch
authors.forename: Yves
authors.initials: Y
authors.lastname: Jackson
authors.forename: Paul
authors.initials: P
authors.lastname: Sebo
authors.forename: Gaelle
authors.initials: G
authors.lastname: Aeby
authors.forename: Patrick
authors.initials: P
authors.lastname: Bovier
authors.forename: Beatrice
authors.initials: B
authors.lastname: Ninet
authors.forename: Jacques
authors.initials: J
authors.lastname: Schrenzel
authors.forename: Philippe
authors.initials: P
authors.lastname: Sudre
authors.forename: Dagmar
authors.initials: D
authors.lastname: Haller
authors.forename: Jean-Michel
authors.initials: JM
authors.lastname: Gaspoz
authors.forename: Hans
authors.initials: H
authors.lastname: Wolff
mesh_terms: D000293:Adolescent; D000328:Adult; D002690:Chlamydia Infections / Q000453:epidemiology* / Q000208:ethnology; D002692:Chlamydia trachomatis / Q000302:isolation & purification*; D003430:Cross-Sectional Studies; D054242:Emigrants and Immigrants; D005260:Female; D006785:Hospitals, University; D006801:Humans; D008297:Male; D008875:Middle Aged; D011320:Primary Health Care; D013557:Switzerland / Q000453:epidemiology; D055815:Young Adult