Immunoblot confirmation of immune response to Campylobacter pyloridis in patients with duodenal ulcers.

The specificity of serum immune responses to Campylobacter pyloridis that were found in the sera of patients with duodenal ulcers has been confirmed by means of the Western blot method. The presence of the same immune response to the organism in apparently healthy individuals, especially older people, suggests a repeated exposure throughout life to this organism, the source of which remains unknown.