title: Prevalence of Chlamydia trachomatis infection among men screened in 4 U.S. cities.
abstract: OBJECTIVE
  The objective of this study was to measure the prevalence of Chlamydia trachomatis (CT) infection among men in clinical and nonclinical settings across the United States.
  
  
  OBJECTIVE
  The goal of this study was to obtain data to inform recommendations regarding male CT screening.
  
  
  METHODS
  The authors conducted a cross-sectional study of CT prevalence among adolescent and adult men in 4 U.S. cities (Baltimore, Denver, San Francisco, and Seattle). CT was detected using urine-based testing, and prevalence was calculated for first testing event.
  
  
  RESULTS
  Over 23,000 men were tested for CT over a 3 1/2-year period. The majority (96%) were asymptomatic. Overall, prevalence was 7% and varied significantly between cities (range: Seattle, 1%; Baltimore, 12%), by age (peak prevalence at age 20-24 years, 9%), and between venues where CT testing was offered.
  
  
  CONCLUSIONS
  At 7%, the prevalence of CT is moderately high among men opportunistically tested in nonclinical and clinical settings.
authors.affiliation: Centers for Disease Control and Prevention (CDC), Atlanta, Georgia 30033, USA. jus8@cdc.gov
authors.forename: Julia Ann
authors.initials: JA
authors.lastname: Schillinger
authors.forename: Eileen Frances
authors.initials: EF
authors.lastname: Dunne
authors.forename: Johanna Beach
authors.initials: JB
authors.lastname: Chapin
authors.forename: Jonathan Mark
authors.initials: JM
authors.lastname: Ellen
authors.forename: Charlotte Ann
authors.initials: CA
authors.lastname: Gaydos
authors.forename: Nancy Jo
authors.initials: NJ
authors.lastname: Willard
authors.forename: Charlotte Kathleen
authors.initials: CK
authors.lastname: Kent
authors.forename: Jeanne Marisa
authors.initials: JM
authors.lastname: Marrazzo
authors.forename: Jeffrey David
authors.initials: JD
authors.lastname: Klausner
authors.forename: Cornelis Arthur
authors.initials: CA
authors.lastname: Rietmeijer
authors.forename: Lauri Ellen
authors.initials: LE
authors.lastname: Markowitz
mesh_terms: D000293:Adolescent; D000328:Adult; D002690:Chlamydia Infections / Q000453:epidemiology* / Q000209:etiology; D002692:Chlamydia trachomatis; D003430:Cross-Sectional Studies; D006801:Humans; D008297:Male; D008403:Mass Screening; D015995:Prevalence; D014481:United States / Q000453:epidemiology; D014504:Urban Health