Structure of <i>cag</i> pathogenicity island in Japanese <i>Helicobacter pylori</i>isolates

Abstract

Most Japanese H pylori strains had the intact cag PAI. However, some lacked most of the cag PAI in spite of the presence of cagA. Thus the presence of the cagA gene is not an invariable marker of cag PAI related virulence in Japanese strains.