The difference in the infection frequencies according to the diagnosis was significant (p = 0.037), and a higher prevalence was observed in gastric cancer patients (70%), Figure 1A. The H. pylori cagA gene was found in 214 (74%) of the 287 infected patients, Figure 1B. However, no significant differences in the frequencies of cagA-positive H. pylori were found among the study groups (p = 0.930). This evidence concerns the gene S100A8 and gastric cancer.