Topographical localisation of cagA positive and cagA negative Helicobacter pylori strains in the gastric mucosa; an in situ hybridisation study

Abstract excerpt

BACKGROUND: The cagA gene is a marker for the presence of the cag pathogenicity island, and the presence of cagA positive strains of Helicobacter pylori can identify individuals with a higher risk of developing gastrointestinal diseases. AIMS: To study the interaction between H. pylori cagA(+) and cagA(-) strains and the gastric mucosa. METHODS: Patients with H. pylori associated gastritis and peptic ulcers were...

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