| prevalence of helicobacter pylori infection in a cohort of italian military students. | in 1990, to study regional prevalences and risk factors of helicobacter pylori infection in healthy young adult males, sera were collected from a nationwide sample of 1659 males (mean age 20.7 years) at introduction into the air force school for military students in caserta, italy. an enzyme-linked immunosorbent assay was used to detect h. pylori specific immunoglobulin g antibodies. the observed overall seropositivity rate was 17.5% (95% ci 15.7-19.4). prevalence was higher in southern italy an ... | 1998 | 9593484 |