The works is based on a previous investigation published in the journal Vnitrní Lékarství, 36, 1990, 8, pp. 759-762. The authors investigated morphological changes of the gastric mucosa and the presence of Campylobacter pylori (CP) in probands with chronic active surface CP positive antrum gastritis one year after treatment with a bismuth preparation (Bismuth citrate 120 mg per capsule made on prescription) for a one-month period 4 capsules per day. This concerned probands with functional dyspepsia without a history of alcohol intake. After a one-year interval eradication of CP persisted in 8 probands (53.3%); in 7 patients (46.7%) there was a relapse of CP positivity. The authors confirmed that CP and active chronic gastritis are associated. Chronic non-specific inflammatory cellulitis persisted after one year with the same intensity in 17 probands (74%), in 6 it increased by one grade (26%). Improvement or complete recovery of the histological finding was not recorded in any of the patients. In the corpus of the stomach the unaltered finding persisted. Morphological changes were always directly proportional to the presence of CP. Its eradication appears to be causal treatment of chronic active surface CP positive antrum gastritis, one of the groups in the wide spectrum of chronic gastritis.