the evaluation of vaca gene alleles frequency in helicobacter pylori strains in children and adults in podlaskie region. | the frequency of helicobacter pylori infection in population can depend on the organism resistance, genetic condition, and bacterial strains virulence. a vaca gene, of mosaic structure, which encodes vacuolating cytotoxin is one of the known genes of h. pylori. the existence of several different genotypes of s and m regions enables the formation of numerous combinations of vaca gene genome. the studies on vaca genotype revealed that the frequency of occurrence of h. pylori containing s1 or s2, a ... | 2007 | 17951170 |