Abstract
The polymerase chain reaction (PCR) method for detecting Helicobacter pylori and Helicobacter spp. in the stomach was used to investigate the prevalence of H. pylori and Helicobacter spp. infection in dogs and cats. Of 40 each of dogs and cats, none was positive for H. pylori. Helicobacter spp. was detected in 23 (58%) of 40 dogs and 17 (43%) of 40 cats. These results had no relationship with clinical symptoms and endoscopic views. The concordance rate between the PCR-positive cases and the urease test positive cases was as high as 83% in dogs and 94% in cats, respectively.