We present a molecular epidemiologic study, based on an analysis of vacA, cagA and cag
right end junction genotypes from 1042 Helicobacter pylori isolates, suggesting that H. pylori …

ABSTRACT DNA motifs at several informative loci in more than 500 strains of Helicobacter
pylori from five continents were studied by PCR and sequencing to gain insights into the …

The predominant H. pylori strain circulating among geographic locations differs with regard
to the genomic structure. This study determined whether structural subtypes of the cagA 3 …

Background The gastric pathogen Helicobacter pylori is extraordinary in its genetic diversity,
the differences between strains from well-separated human populations, and the range of …

Background Helicobacter pylori is presumed to be co-evolved with its human host and is a
highly diverse gastric pathogen at genetic levels. Ancient origins of H. pylori in the New …

Helicobacter pylori infection is common in Alaska. The development of severe H. pylori
disease is partially determined by the virulence of the infecting strain. Here we present vacA …

Helicobacter pylori virulence determinants have not previously been studied in detail in
Latin Americans with H. pylori infections. We characterized the vacA (vacuolating cytotoxin …

Background & Aims: Distinct allelic types of Helicobacter pylori vacA have been defined. The
geographic distribution of vacA alleles and cagA was assessed in this study. Methods: A …

Background. Thailand is at the cultural cross roads between East and South Asia. It has
been suggested that this is also the region where the predominant Helicobacter pylori (H …

There is considerable geographical variation in the distribution of allelic types of
Helicobacter pylori. This first study from Kuwait determined the prevalence of cagA and vacA …