We report the isolation of Helicobacter ailurogastricus, a Helicobacter species that infects cats and dogs, from a person with multiple refractory gastric ulcers. In addition to H. suis, which infects pigs, Helicobacter species that infect cats and dogs should be considered as potential gastric pathogens in humans.
Keywords: Helicobacter ailurogastricus; Helicobacter heilmannii; Japan; bacteria; gastric ulcers; non-Helicobacter pylori Helicobacter.