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Table 2 Frequency of genes cagA and dupA and genotypes of vacA in H. pylori strains isolated from 105 adults and 100 children with gastric chronic and normal gastric mucosa

From: Association among H. pylori virulence markers dupA, cagA and vacA in Brazilian patients

Genes N (%) Samples from N (%) Histopathology
Chronic gastritis NGT
Total Adults Children Adults Children Adults Children
cagA + 98 (47.8) 51 (48.6) 47 (47) 47 (30.7) 26 (16.9) 1 (7.7) 4 (30.75)
cagA – 107 (52.2) 54 (51.4) 53 (53) 48 (31.4) 32 (21) 1 (7.7) 7 (53.85)
dupA + 85 (41.4) 48 (45.7) 37 (37) 44 (28.7) 26 (16.9) 1 (7.7) 2 (15.4)
dupA – 120 (58.6) 57 (54.3) 63 (63) 51 (33.3) 32 (21) 1 (7.7) 9 (69.2)
s1/m1 103 (50.2) 58 (55.2) 45 (45) 54 (35.3) 26 (16.9) 2 (15.4) 4 (30.75)
s2/m2 75 (36.6) 33 (31.4) 42 (42) 28 (18.4) 26 (16.9) 0 (–) 4 (30.75)
s1/m2 17 (8.3) 10 (9.5) 7 (7) 10 (6.5) 4 (2.7) 0 (–) 2 (15.4)
s2/m1 1 (0.5) 0 (–) 1 (1) 0 (–) 0 (–) 0 (–) 0 (–)
s1/s2/m1/m2 9 (4.4) 4 (3.9) 5 (5) 3 (1.9) 2 (1.4) 0 (–) 1 (7.7)
Total 205 (100) 105 (100) 100 (100) 153 (100) 13 (100)
  1. NGT: normal gastric tissue.