title: Improved contact tracing for Chlamydia trachomatis with experienced tracers, tracing for one year back in time and interviewing by phone in remote areas.
abstract: OBJECTIVE
  To evaluate the Swedish model for contact tracing and especially the "Västerbotten model" with centralised, extended contact interview periods, sometimes by telephone.
  
  
  METHODS
  Using questionnaires, the contact tracing and interview procedure was evaluated during 2002, followed by an evaluation of contact interviewing by phone in 2005-6.
  
  
  RESULTS
  Patients with diagnosed Chlamydia trachomatis infection reported on average 2.5 sexual contacts, 3.0 contacts when contact interviewing was performed at the clinic, and 2.3 contacts when performed by phone. 65% of the sexual contacts with a known test result were infected.
  
  
  CONCLUSIONS
  Centralised contact tracing, exploring the sexual history for at least 12 months back in time, shows good results. Combined with screening of certain risk groups it is probably one effective way of preventing C trachomatis infections. Preventing C trachomatis by primary prevention such as information and counselling is, however, still of great importance.
authors.affiliation: Department of Public Health and Clinical Medicine, Dermatology and Venereology, University Hospital, SE-901 85 Umeå, Sweden.
authors.forename: H
authors.initials: H
authors.lastname: Carré
authors.forename: J
authors.initials: J
authors.lastname: Boman
authors.forename: A
authors.initials: A
authors.lastname: Osterlund
authors.forename: B
authors.initials: B
authors.lastname: Gärdén
authors.forename: E
authors.initials: E
authors.lastname: Nylander
mesh_terms: D000293:Adolescent; D000328:Adult; D002690:Chlamydia Infections / Q000453:epidemiology*; D002692:Chlamydia trachomatis; D016358:Contact Tracing / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013548:Sweden; D017216:Telemedicine / Q000592:standards*; D013689:Telephone; D014504:Urban Health