[Gastritis caused by Helicobacter heilmannii probably transmitted from dog to child].

Gastric infection with Helicobacter heilmannii is rare but is known to be associated with chronic active gastritis, peptic ulcer, and low-grade mucosa-associated lymphoid tissue lymphoma in humans. In contrast to H. pylori, various H. heilmannii species colonize the stomachs of domestic animals, which might be a reservoir for transmission to humans. We report the case of a 12-year-old boy presenting with chronic gastritis caused by H. heilmannii. Endoscopic examination reveals H. heilmannii-like infection on biopsy samples in his two pet dogs. Sequencing of the 16S and 23S ribosomal DNA by PCR was used to compare the H. heilmannii-like bacterial samples isolated in the boy and his dogs. These DNA amplification methods suggest that the boy was infected by his pet dogs (zoonosis). Our patient was cured by treatment with proton-pump inhibitor and antibiotics. Endoscopic follow-up of the boy showed a complete cure of gastritis and eradication of the bacterium.