Infection with cagA-positive and cagA-negative types of Helicobacter pylori among children and adolescents with gastrointestinal symptoms in Latvia.

Abstract excerpt

In order to determine the prevalence of concomitant cagA-positive and cagA-negative Helicobacter pylori genotypes in individual subjects, a group of 56 symptomatic patients (aged 8-18 years) was studied. Among 31 patients culture-positive for Helicobacter pylori, only cagA-positive colonies were isolated from 18 patients, both cagA-positive and cagA-negative genotypes were isolated from 4 patients, and in 9...

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