title: [Hepatitis B case grouping serological study among six chinese families in Almeria, Spain].
abstract: BACKGROUND
  Following the detection of two cases of members of 6 Chinese families having tested positive for the hepatitis B virus, a study of those living in these families was begun for the purpose of knowing the spread of the infection within the family environment of the cases detected.
  
  
  METHODS
  Descriptive study. Population under study: 24 members of six Chinese families.
  
  
  METHODS
  Age, sex, serological diagnosis, risk factors, healthcare-related attitude.
  
  
  METHODS
  Clinical records, serological data, epidemiological survey and immunization cards. A family focus was employed and the genogram used.
  
  
  METHODS
  Distribution Binomial spread for calculating probability of occurrence of the process to be studied.
  
  
  RESULTS
  A total of 14 males (58.3%) and 10 females (41.7%) ranking from 1 to 54 years of age were studied. The age group having the largest number of subjects studied was the age 21-30 group (37.5%). Twelve chronic hepatitis B infections were recorded (50%). No relationship was found to exist with the risk factors studied in the epidemiological survey conducted. The probability of this number of chronic hepatitis cases occurring was 0.066 x 10(-6).
  
  
  CONCLUSIONS
  It was concluded that the prevalence of infection found was probable due to intra-family transmission. Given the low probability of occurrence of a process of this type, the case grouping found is considered to be high.
authors.affiliation: Sección de Epidemiología. Distrito Sanitario de Atención Primaria Levante-Alto Almanzora Almeria. mariap.barroso.sspa@juntadeandalucia.es
authors.forename: Pilar
authors.initials: P
authors.lastname: Barroso García
authors.forename: M Angeles
authors.initials: MA
authors.lastname: Lucerna Méndez
authors.forename: Estrella
authors.initials: E
authors.lastname: Adrián Monforte
authors.forename: Tesifón
authors.initials: T
authors.lastname: Parrón Carreño
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D002681:China / Q000208:ethnology; D005192:Family Health; D005260:Female; D006509:Hepatitis B / Q000453:epidemiology*; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D016036:Seroepidemiologic Studies; D013030:Spain / Q000453:epidemiology