Stomach biopsies and samples of nasal mucus were cultured in patients with dyspeptic symptoms who underwent endoscopy to evaluate the possible route of transmission of Helicobacter pylori (H pylori). 42 patients were examined. For each patient two biopsies from the stomach corpus and antrum were taken and, before endoscopy, one nasal swab was obtained. Biopsy samples were tested for urease test, microbiological culture, and histological examination. The nasal swab was processed for microbiological examination. H pylori was not found in the nasal mucus of any of the patients, including the 36 who had H pylori in gastric biopsies.
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