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. Author manuscript; available in PMC: 2014 Sep 1.
Published in final edited form as: Mucosal Immunol. 2013 Jan 9;6(5):950–959. doi: 10.1038/mi.2012.133

Table 1.

H. pylori virulence factors

Source of H. pylori
Children Adults P value
n=12 n=7
CagA, n (%) 11 (92) 5 (71) 0.2
VacA S alleles 0.1
 s1 allele, n (%) 4 (33) 5 (71)
 s2 allele, n (%) 8 (66) 2 (29)