ABSTRACT
<p><b>OBJECTIVE</b>To investigate the distribution of babA2 cagA and vacA genotypes of Helicobacter pylori (Hp) in chronic gastritis and peptic ulcer and to discuss the relationship between babA2, cagA and vacA genotypes of Hp and chronic gastritis and peptic ulcer.</p><p><b>METHODS</b>babA2, cagA genotypes and vacA subtype of 58 Hp strains isolated from patients of Zhejiang province with chronic gastritis or peptic ulcer were tested by polymerase chain reaction.</p><p><b>RESULTS</b>The positive rates of babA2, cagA, vacAs1a, vacA m1 and vacA m2 of 58 Hp strains were 87.9%, 100%, 93.1%, 1.7% and 65.5%, respectively. There were no significant differences between the positive rates of babA2, vacA s1a and vacA m2 genes of Hp strains isolated from patients with chronic gastritis and peptic ulcer.</p><p><b>CONCLUSION</b>The genotypes of Hp isolated from patients of Zhejiang province were predominatly babA2 positive, cagA positive and vacA s1a/m2. The relationships between babA2, cagA and vacA genotypes of Hp and chronic gastritis and peptic ulcer can not be identified.</p>