Presence of antibody against H. pylori among patients with gastro-duodenal ulceration and healthy Vietnamese

The results of study on the sera of 110 patients with gastro-duodenal disease and 31 healthy person by indirect immuno-fluorescence assay (IFA) show that prevalence of IgG anti-H. pylori is 98.2% on patients and 77.4% on healthy persons. The proportions of IgM seropositive on both groups are 6.5%-7.3%. The discriminated point of IgG by IFA is 1:32.