| [characterization of the helicobacter pylori vacuolating cytotoxin gene in gastric biopsy specimens from patients living in tolima, colombia]. | helicobacter pylori successfully colonizes the gastric niche. these bacteria produce a vacuolating cytotoxin known as vaca, which is codified by the vaca gene. this protein represents an important virulence factor. h. pylori strains have different vaca alleles, which show a variety of phenotypes that have been associated with gastrointestinal diseases. the aim of this study was to generate data about the prevalence of h. pylori and the vaca genotype in tolima (colombia) residents, and to evaluat ... | 2009 | 19391518 |