Isotype evolution in the follow-up study of patients with Campylobacter pylori associated gastritis.

Four sequential immuno-assays were performed from May to November 1988 to follow the levels of IgG, IgA and IgM to Campylobacter pylori in 16 infected patients with histologically proven gastritis, among which 12 received appropriate therapy. Histopathological examination of antral biopsies, bacteriological cultures and urease tests were performed on each occasion when serum was tested for antibodies to C. pylori. The detection and quantitative assessment of the various isotypes to this bacterium proved valuable to appreciate the response to therapy with, in case of success, a steady decrease of antibodies levels concomitant with clinical improvement.