title: [Relationship between CagA-bearing strains of Helicobacter pylori and gastrointestinal pathology].
abstract: OBJECTIVE
  To study the prevalence of CagA-positive strains of Helicobacter pylori in Novosibirsk residents and to assess their relation to some clinical parameters.
  
  
  METHODS
  Random sample of the population (218 males and 220 females aged 25-64 years) was examined. Antibodies against Helicobacter pylori and CagA protein were tested in the sera using enzyme immunoassay. Gastrointestinal symptoms were evaluated with questionnaire.
  
  
  RESULTS
  The prevalence of H. pylori infection was 88%, among H. pylori-positive persons CagA-positivity was revealed in 58%. Presence of antibodies to CagA protein was associated with dyspepsia (OR = 2.5, 95% CI 1.2-2.5) and history of peptic ulcer (OR = 3.6, 95% CI 1.0-14.5). CagA-positive subjects more frequently reported bowel disturbances, diarrhea, in particular (OR = 2.9, 95% CI 1.2-7.4).
  
  
  CONCLUSIONS
  The data showed similar distribution of H. pylori and CagA-positivity among adult population in Russia and Eastern European countries. CagA-positivity is associated with peptic ulcer and dyspepsia.
authors.forename: O V
authors.initials: OV
authors.lastname: Reshetnikov
authors.forename: S A
authors.initials: SA
authors.lastname: Kurilovich
authors.forename: S A
authors.initials: SA
authors.lastname: Krotov
authors.forename: V A
authors.initials: VA
authors.lastname: Krotova
authors.forename: O V
authors.initials: OV
authors.lastname: Shumakov
mesh_terms: D000328:Adult; D000942:Antigens, Bacterial / Q000276:immunology*; D001426:Bacterial Proteins / Q000276:immunology*; D003967:Diarrhea / Q000276:immunology / Q000382:microbiology; D005260:Female; D005767:Gastrointestinal Diseases / Q000276:immunology* / Q000382:microbiology*; D016481:Helicobacter Infections / Q000150:complications* / Q000276:immunology*; D016480:Helicobacter pylori / Q000276:immunology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010437:Peptic Ulcer / Q000276:immunology / Q000382:microbiology
chemical_list: D000942:Antigens, Bacterial; D001426:Bacterial Proteins; C080866:cagA protein, Helicobacter pylori