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  • Title: Determination of the prevalence of Helicobacter heilmannii-like organisms type 2 (HHLO-2) infection in humans and dogs using non-invasive genus/species-specific PCR in Korea.
    Author: Chung TH, Kim HD, Lee YS, Hwang CY.
    Journal: J Vet Med Sci; 2014 Jan; 76(1):73-9. PubMed ID: 24065079.
    Abstract:
    Helicobacter spp. may have multiple routes of transmission. It is unclear, however, whether the agent is zoonotic and therefore transmitted from an animal reservoir, including dogs. The aim of this population-based study was to assess the relationship between pet ownership or frequent exposure to dogs and Helicobacter spp. infection, especially focusing on HHLO-2 (Helicobacter heilmannii-like organisms type 2) in saliva and feces samples in Korea, using non-invasive genus/species-specific PCR. One hundred twenty-four eligible human subjects and 39 dogs participated in this study. Relativity of contact with dogs and Helicobacter spp. infection diagnosed by genus-specific PCR showed a statistically significant result (P<0.01), but in the relativity analyses between contact with dogs and H. pylori, H. felis and H. bizzozeronii infections diagnosed using species-specific PCR, only Helicobacter felis showed a statistically significant result. Although H. pylori infection showed a statistically significant relativity, no statistically significant association was found between veterinarian subjects and Helicobacter. spp., H. felis and H. bizzozeronii infections. On performing risk factor analyses of HHLO-2 infection by transmission, using matching species, between HHLO-2-positive dog owners and HHLO-2-positive dogs, Helicobacter felis infection showed an extremely significant relativity (P<0.0001), and Helicobacter bizzozeronii may also be a possible significant risk factor (P<0.01). These results suggest that HHLO-2 infection might be a zoonotic infection, because continuous contact with dogs was proved to be correlated with human H. felis and H. bizzozeronii infections in this study.
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