title: [Endemic hepatitis B in 2 marginal ethnic minorities. Comparative study].
abstract: BACKGROUND
  To know and compare the prevalence of hepatitis B (HB) in two marginal populations (ciganes and gypsies) presumably pertaining to the same ethnic group and considered to have high risk for the disease.
  
  
  METHODS
  Serologic markers were determined in 245 ciganes (65% of the total of the cigane population) and in 127 gypsies (45% of the total gypsy population). One hundred three individuals randomly chosen from the neighborhood were studied as a control group.
  
  
  RESULTS
  HbsAg was negative in the gypsies and positive in 0.9% of the controls and in 27% of the ciganes (p < 0.001). HbeAg was positive in 15% of the ciganes and negative in the other two groups (p < 0.001). Antibodies were found in 10% of the controls, 12% of the gypsies and in 72% of the ciganes (p < 0.001). In gypsies it was found that 29% were infected from adolescence versus 13% of the control population (p < 0.001). High intrafamily horizontal transmission in infancy was found in the ciganes in addition to vertical transmission.
  
  
  CONCLUSIONS
  The different habits and more precarious life style of the ciganes with respect to the gypsies may be the cause for the hyperendemia of hepatitis B in the former.
authors.affiliation: Centro de Salud San Jorge, Pamplona, Navarra.
authors.forename: M T
authors.initials: MT
authors.lastname: Virto Ruiz
authors.forename: M P
authors.initials: MP
authors.lastname: Marín Alcalá
authors.forename: T
authors.initials: T
authors.lastname: Pascual Val
authors.forename: C
authors.initials: C
authors.lastname: López Morrás
authors.forename: I
authors.initials: I
authors.lastname: Aramburu Bergua
authors.forename: J
authors.initials: J
authors.lastname: Zubicoa Ventura
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000818:Animals; D002648:Child; D002675:Child, Preschool; D006224:Cricetinae; D005006:Ethnicity; D005260:Female; D006509:Hepatitis B / Q000097:blood / Q000453:epidemiology* / Q000208:ethnology; D006510:Hepatitis B Antibodies / Q000097:blood; D006511:Hepatitis B Antigens / Q000097:blood; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D008913:Minority Groups; D015995:Prevalence; D011446:Prospective Studies; D006178:Romani People; D016036:Seroepidemiologic Studies; D013030:Spain / Q000453:epidemiology
chemical_list: D006510:Hepatitis B Antibodies; D006511:Hepatitis B Antigens
vernacular_title: Hepatitis B endémica en dos minorías étnicas marginales. Estudio comparativo.