Primer informe sobre el aislamiento de Primer informe sobre el aislamiento de Primer informe sobre el aislamiento de Primer informe sobre el aislamiento de Helicobacter pylori Helicobacter pylori Helicobacter pylori Helicobacter pylori asociado a enfermedades digestivas en Ciudad de La asociado a enfermedades digestivas en Ciudad de La asociado a enfermedades digestivas en Ciudad de La asociado a enfermedades digestivas en Ciudad de La Habana

Abstract Infection by Helicobacter pylori plays an important role in different digestive diseases. At present it is accepted that thismicroorganism is related to active chronic gastritis, peptic ulcer (gastric as well as duodenal), gastric adenocarcinoma andB-cell gastric lymphoma of the lymphoid tissue associated with mucosa (MALT lymphoma). The study included 121patients: 53 having an endoscopic diagnosis of gastritis, 21 with peptic ulcer, 20 with duodenal ulcers, 3 adenocarcinomasof the gastric antro , 5 esophagus neoplasm, and 19 normal panendoscopies (dyspeptic). Gastroscopy was carried out onall patients and four biopsy fragments were taken from the antro and body regions of the stomach. For diagnosis andisolation of H . pylori a fast urease test was used. Gram stain and culture in brain heart agar with 10% horse serum, 0,25%yeast extract and Dent supplement (OXOID SR 147) during 7 days at 37 oC in a jar with a microaerophyllic environmentwere also done. The presence of catalase and oxidase were also evaluated. An infection prevalence of 79,2% wasobserved in chronic gastritis patients, 100% in duodenal ulcer patients, and 90,4% in those with gastric ulcer, inagreement with the reports from other authors. In 100% of the gastric adenocarcinoma cases and 60% of the ones withesophagus neoplasm the microorganism was isolated. Isolation of