Are non-pylori helicobacters present in the human oral cavity?

Introduction and objective Helicobacter pylori ( H. pylori ) is a human gastric pathogen. Because of presence of H. pylori oral cavity, there is a possibility of H. pylori transmission by oral-oral route. In a crosssectional study, the presence of some virulence factors of H. pylori and also non-pylori Helicobacters in dental plaque samples of participants was investigated. Methods The samples were collected from at least two teeth surfaces. DNA of the samples was extracted using specific kit. The presence of dupA ( jhp0917 and jhp0918 ) and babA2 genes and also Helicobacter genus and H. pylori species was investigated using polymerase chain reaction by specific primers. Results In total 44% (20/45) and 86.7% (39/45) of samples was positive for ureC and 16SrRNA genes respectively. The frequency of babA2, jhp0917 and jhp0918 genes in H. pylori isolates were 40, 20 and 65% respectively. It seems 19 samples were positive probably non-pylori Helicobacters. Conclusion In the present study we report for the first time the presence of non- pylori Helicobacter species and also high frequency of babA2 and dupA genotypes in dental plaque samples.