Table 2 H. pylori virulence factors (cagA and vacA) in study isolates

cagA genotype

 cagA-positive

66 (79.5%)

64/66

2/66

 ABD

63 (75.9%)

61/63

2/63

 ABC

1 (1.2%)

1/1

0/1

 ABCC

2 (2.4%)

2/2

0/2

 Pre-EPIYA type -no deletion

34 (41%)

32/34

2/34

 Pre-EPIYA type -18 bp deletion

31 (37.3%)

30/31

1/31

 Pre-EPIYA type -39 bp deletion

1 (1.2%)

1/1

0/1

 cagA negative

17 (20.5%)

2/17

15/17

vacA

83 (100%)

66/66

17/17

 s1

82 (98.8%)

66/66

16/17

 s2

1 (1.2%)

0/66

1/17

 m1

34 (41%)

33/66

1/17

 m2

49 (59%)

33/66

16/17

Genotype summary

 cagA-positive/vacA s1m1

34

33

1

 cagA-negative/vacA s1m1

0

0

0

 cagA-positive/vacA s1m2

32

31

1

 cagA-negative/vacA s1m2

16

2

14

 cagA-positive/vacA s2m2

0

0

0

 cagA-negative/vacA s2m2

1

0

1

Total

83

66

17