Patient’s consent was not obtained. the patient has not had a recurrence of multiple ulcers but remains positive for h. ailurogastricus . the limitation of this case report is that, although we succeeded in culturing h. ailurogas- tricus in the stomach of this patient and the drug-sus- ceptibility test has determined the regimen for eradica- tion, we have not yet been able to perform eradication therapy. therefore, the efficacy of eradication in h. ailu- rogastricus infections has not been confirmed. h. ailuro- gastricus eradication therapy will be administered at the next patient visit to prevent ulcer recurrence. the clinical importance of nhph infection in the human stomach has been increasing in the post- h. pylori era. because nhph species such as h. suis and h. ailurogastricus cannot be detected by most h. pylori diag- nostic tests, such as the urea breath test and stool anti-gen test, nhph infections should be considered when routine tests are negative, despite the presence of inflammatory findings in the gastric mucosa. about the author