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Plasma IgE concentrations from 49 patients infected with H. pylori strains of differing virulence genotypes. Of the 29 cagA+ strains, 24 were of the i1 vacA genotype and 5 were vacA i2. Of the 20 cagA− strains, 15 were vacA i2 and 5 were of the vacA i1 genotype. Points represent the results from individuals and horizontal lines depict the median.
