Evidence that <i>cagA</i> ^<i>+</i> <i>Helicobacter pylori</i> strains are disappearing more rapidly than <i>cagA</i> ⁻ strains

Abstract excerpt

BACKGROUND AND AIMS: The prevalence of Helicobacter pylori colonisation in populations in developed country has been declining, as shown by community based serological surveys of adults in Vammala, Finland in 1973 and 1994. In this study, we determined whether the proportion of subjects colonised by cagA(+) or cagA(-) H pylori strains has changed as the overall prevalence of H pylori(+) has declined. METHODS: We...

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