vacA s1m1 genotype and cagA EPIYA-ABC pattern are predominant among Helicobacter pylori strains isolated from Mexican patients with chronic gastritis

Abstract

H. pylori strains carrying vacA s1m1, cagA⁺ and babA2^- genotypes were the most prevalent in patients with chronic gastritis from the south of Mexico. In the cagA⁺ strains, the EPIYA-ABC motif was the most common.