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Table 2 Distribution of vac A alleles of H. pylori strains of relatives of gastric cancer patients (n = 55) and control group (n = 48)

From: Higher frequency of cagA EPIYA-C Phosphorylation Sites in H. pylori strains from first-degree relatives of gastric cancer patients

vacA Genotypes1 Control group n (%) Gastric cancer relatives
Siblings n (%) Offspring n (%)
s1m1 23 (47.92) 10 (66.67) 26 (65.00)
s1m2 21 (43.75) 04 (26.67) 10 (25.00)
s2m2 03 (6.25) 01 (6.67) 02 (5.00)
Mixed2 01 (2.08) 0 02 (5.00)
Total 48 (100) 15 (100) 40 (100)
  1. 1Only vacA s1 genotype was identified in 6 cases (1 control, 2 siblings and 3 offsprings of gastric cancer relatives); 2Mixed infection by s1m1 and s2m2 or s1m1 and s1m2 (two cases).