S100A8 and peptic ulcer disease: The prevalence of the cagA-positive/vacA s1/m1 genotype was the highest in strains from gastric cancer patients (76.5% (13/17)), followed by those from peptic ulcer patients (60% (6/10)) and those from gastritis patients (54.3% (185/341)), but the differences were not statistically significant (Figure 1D).