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Seasonal distribution of Helicobacter pylori in Iranian drinking water samples. The number of samples collected in summer, autumn, winter, and spring seasons were 95, 100, 110 and 95, respectively. Number of positive strains obtained from the water samples collected from summer, autumn, winter, and spring seasons were seven, two, one, and two strains, respectively. Prevalence of H. pylori in each season is shown by percentage.
