Validation of a Novel Immunoline Assay for Patient Stratification according to Virulence of the Infecting Strain and Eradication Status.

infection shows a worldwide prevalence of around 50%. However, only a minority of infected individuals develop clinical symptoms or diseases. The presence of virulence factors, such as CagA and VacA, has been associated with disease development, but assessment of virulence factor presence requires gastric biopsies.