title: Estimates of the number of female sex workers in different regions of the world.
abstract: OBJECTIVE
  To collect estimated numbers of female sex workers (FSW) and present proportions of FSW in the female population (FSW prevalence) in different regions of the world.
  
  
  METHODS
  Subnational and national estimated numbers of FSW reported in published and unpublished literature, as well as from field investigators involved in research or interventions targeted at FSW, were collected. The proportion of FSW in the adult female population was calculated. Subnational estimates were extrapolated to national estimates if appropriate. Population surveys were scanned for proportions of adult women having sex in exchange for money or goods.
  
  
  RESULTS
  In sub-Saharan Africa, the FSW prevalence in the capitals ranged between 0.7% and 4.3% and in other urban areas between 0.4% and 4.3%. Population surveys from this same region yielded even higher proportions of women involved in transactional sex. The national FSW prevalence in Asia ranged between 0.2% and 2.6%; in the ex-Russian Federation between 0.1% and 1.5%; in East Europe between 0.4% and 1.4%; in West Europe between 0.1% and 1.4%; and in Latin America between 0.2% and 7.4%. Estimates from rural areas were only available from one country.
  
  
  CONCLUSIONS
  Although it is well known and accepted that FSW are a highly vulnerable group in the scope of the HIV epidemic, most countries in the world do not know the size of this population group. The estimates of the prevalence of FSW presented in this paper show how important this hard-to-reach population group is in all parts of the world.
authors.affiliation: STD/HIV Research and Intervention Unit, Institute of Tropical Medicine, Nationalestraat 155, 2000 Antwerp, Belgium. jvdpitte@itg.be
authors.forename: J
authors.initials: J
authors.lastname: Vandepitte
authors.forename: R
authors.initials: R
authors.lastname: Lyerla
authors.forename: G
authors.initials: G
authors.lastname: Dallabetta
authors.forename: F
authors.initials: F
authors.lastname: Crabbé
authors.forename: M
authors.initials: M
authors.lastname: Alary
authors.forename: A
authors.initials: A
authors.lastname: Buvé
mesh_terms: D000328:Adult; D005260:Female; D014943:Global Health; D006801:Humans; D011156:Population Density; D011159:Population Surveillance / Q000379:methods; D015995:Prevalence; D011477:Sex Work / Q000706:statistics & numerical data*