| helicobacter pylori and gastric carcinoma. serum antibody prevalence in populations with contrasting cancer risks. | this investigation examined the correlation between helicobacter pylori (hp) infection, as reflected in immunoglobulin g serum antibodies, and the risk of gastric cancer. serum samples were obtained from populations with contrasting gastric cancer risks. the highest prevalence of hp infection, 93%, was observed in the adult population at highest gastric cancer risk, the residents of pasto, colombia. in the lower risk colombian city of cali, a 63% overall prevalence rate was found. both children ... | 1990 | 2249197 |