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

From: The endemic Helicobacter pylori population in Southern Vietnam has both South East Asian and European origins

Genotypes description Total
n = 83
n (%)
Lineage classification
hspEastAsia
n = 66
hpEurope
n = 17
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