title: Unlinked anonymous monitoring of HIV prevalence at sexually transmitted disease clinics.
abstract: OBJECTIVE
  To determine the prevalence of HIV infection among patients attending the four sexually transmitted disease (STD) clinics in two metropolitan areas of New Zealand.
  
  
  METHODS
  The population studied comprised everyone who attended between August 1991 and August 1992 because of concern about a possible new episode of an STD and who had a blood specimen taken for hepatitis B (or syphilis) serology. The study involved unlinked anonymous testing of left-over blood specimens, following ethical guidelines that have been proposed internationally.
  
  
  RESULTS
  Among 8478 specimens tested, 23 (2.7 per 1000) were found to be HIV positive. The seroprevalence rates per 1000 among women, heterosexual men, and homosexual or bisexual men were 1.1, 1.3, and 44, respectively. All but five of the infected people were either known to be HIV positive or had an identifiable test during their clinic attendance.
  
  
  CONCLUSIONS
  The seroprevalence rates are similar to those reported from STD clinics in England, and suggest that heterosexual transmission of HIV infection has not yet been extensive in New Zealand.
authors.affiliation: Department of Preventive and Social Medicine, University of Otago, Dunedin.
authors.forename: N P
authors.initials: NP
authors.lastname: Dickson
authors.forename: C
authors.initials: C
authors.lastname: Paul
authors.forename: D C
authors.initials: DC
authors.lastname: Skegg
authors.forename: K J
authors.initials: KJ
authors.lastname: Sharples
authors.forename: P H
authors.initials: PH
authors.lastname: Lyttle
authors.forename: P J
authors.initials: PJ
authors.lastname: Say
authors.forename: M C
authors.initials: MC
authors.lastname: Croxson
authors.forename: D G
authors.initials: DG
authors.lastname: Woodfield
mesh_terms: D000293:Adolescent; D000328:Adult; D000554:Ambulatory Care Facilities; D005260:Female; D015528:HIV Seroprevalence; D006801:Humans; D008297:Male; D008875:Middle Aged; D009520:New Zealand / Q000453:epidemiology; D011159:Population Surveillance / Q000379:methods; D012749:Sexually Transmitted Diseases / Q000175:diagnosis*