title: [Prevalence of hepatitis B virus infection and needs of vaccination in high risk populations].
abstract: OBJECTIVE
  We aimed to evaluate the serological status of hepatitis B virus (HBV) and the vaccination's needs among high risk populations.
  
  
  METHODS
  Cross sectional study of subjects first attending a HIV diagnosis clinic in Madrid during 2000-2002. Patients who had not been vaccinated for HBV were classified according to the serological markers as active infection (HBsAg+), past infection (anti-HBc+ and HBsAg) or susceptible (anti-HBc).
  
  
  RESULTS
  A total of 7,827 patients were analyzed: 5.2% injecting drug users, 21% homosexual men, 38% female sex workers, and 34% subjects with other heterosexual risks. 50% were from countries other than Spain. HIV prevalence was 4.1%. 10.4% had completed or initiated the vaccination. The prevalence of HBsAg was 1.2% and it was associated with age over 30 years and an origin country in Africa or eastern Europe. 76% were susceptible to HBV and this status was independently associated with male sex, age lower than 30 years, heterosexual risk, Spaniard or Latin American origin, and HIV seronegative.
  
  
  CONCLUSIONS
  Vaccination should be intensified in health care settings commonly attended by these population groups.
authors.affiliation: Centro Sanitario Sandoval. Instituto Madrileño de Salud. Madrid. Spain. crbazan@hotmail.com
authors.forename: Carmen
authors.initials: C
authors.lastname: Rodríguez
authors.forename: Jesús
authors.initials: J
authors.lastname: Castilla
authors.forename: Jorge
authors.initials: J
authors.lastname: del Romero
authors.forename: Almudena
authors.initials: A
authors.lastname: Lillo
authors.forename: María Eugenia
authors.initials: ME
authors.lastname: Puig
authors.forename: Soledad
authors.initials: S
authors.lastname: García
mesh_terms: D000293:Adolescent; D000328:Adult; D003430:Cross-Sectional Studies; D005260:Female; D006509:Hepatitis B / Q000453:epidemiology* / Q000517:prevention & control*; D017325:Hepatitis B Vaccines; D006801:Humans; D008297:Male; D008875:Middle Aged; D020380:Needs Assessment; D015995:Prevalence; D012307:Risk Factors
chemical_list: D017325:Hepatitis B Vaccines