Comparison of the presence of cagPAI genes in H. pylori isolates from patients with gastric cancer and gastritis revealed that only two genes were significantly associated with gastric cancer: tnpA, detected in 73.5% (25/34) of the gastric cancer cases, with an odds ratio of 6.66 [95% CI, 2.30-19.25], and LEC, observed in 58.8% (20/34) of cases, with an odds ratio of 10.71 [95% CI, 3.07-37.28]. The gene discussed is CCL16; the disease is gastric cancer.