H. pylori vacA s1a, cagA, cagE genotypes have significant relations with the presence of DU and GC, and iceA1, babA2 with GC in Turkish patients with dyspepsia, whereas cagE and vacA s1a genotypes are independent predictors of DU, and babA2 and cagE genotypes are independent predictors of GC.

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When analyzed together with host genetic factors, the well established bacterial risk factor babA2 seems to be the most important predictor of malignant disorders, and the presence of the IL-1B-31TT genotype emerges as a protective factor against them.

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