title: Seroprevalence and risk factors associated with Helicobacter pylori infection in blood donors in Salvador, Northeast-Brazil.
abstract: Helicobacter pylori plays an important role in the etiology of peptic ulcer disease. Its prevalence appears to be higher in developing countries. We evaluated the seroprevalence of H. pylori and risk factors associated with infection in voluntary blood donors who attended the main blood center of the city of Salvador, Brazil. The subjects responded to an epidemiological questionnaire, with information about sex, age, race, lifestyle, social-economic level indicators, and residence and hygiene conditions. Anti-H. pylori antibody was determined by ELISA (Cobas Core, Roche). Three hundred and seven subjects were included in the study. Anti-H. pylori antibody results were indeterminate in 33 individuals (10.8%), who were excluded from analysis. Among the remaining 274 subjects, 187 (68.2%) were anti-H. pylori positive. Based on multivariate logistic regression analysis three variables were found to be significantly associated with a higher prevalence of H. pylori infection: absence of plumbing in the residence during childhood, a history of rainwater invading the dwelling during childhood, and low ingestion of milk.
authors.affiliation: Gastroenterology and Hepatology Service of Federal University of Bahia and Gastro-Hepatology Service of São Rafael Hospital, Salvador, BA, Brazil.
authors.forename: Andre C
authors.initials: AC
authors.lastname: Lyra
authors.forename: Genoile
authors.initials: G
authors.lastname: Santana
authors.forename: Nelam
authors.initials: N
authors.lastname: Santana
authors.forename: Anibal
authors.initials: A
authors.lastname: Silvany-Neto
authors.forename: Emilia
authors.initials: E
authors.lastname: Magalhães
authors.forename: Eduardo M
authors.initials: EM
authors.lastname: Pereira
authors.forename: Ramiro
authors.initials: R
authors.lastname: Mascarenhas
authors.forename: Marcos C
authors.initials: MC
authors.lastname: Lyra
authors.forename: Andrea
authors.initials: A
authors.lastname: Veiga
authors.forename: Karina
authors.initials: K
authors.lastname: Ferreira
authors.forename: Schilioma
authors.initials: S
authors.lastname: Zaterka
authors.forename: Luiz G
authors.initials: LG
authors.lastname: Lyra
mesh_terms: D000328:Adult; D000907:Antibodies, Bacterial / Q000097:blood; D001782:Blood Donors; D001938:Brazil / Q000453:epidemiology; D004797:Enzyme-Linked Immunosorbent Assay; D004812:Epidemiologic Methods; D005260:Female; D016481:Helicobacter Infections / Q000097:blood / Q000175:diagnosis / Q000453:epidemiology*; D016480:Helicobacter pylori / Q000276:immunology*; D006801:Humans; D008297:Male
chemical_list: D000907:Antibodies, Bacterial