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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).