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  • Title: Presence of the oral bacterium Capnocytophaga canimorsus in the tooth plaque of canines.
    Author: Dilegge SK, Edgcomb VP, Leadbetter ER.
    Journal: Vet Microbiol; 2011 May 05; 149(3-4):437-45. PubMed ID: 21239122.
    Abstract:
    Capnocytophaga canimorsus is a potentially pathogenic microorganism when transmitted to humans from the oral cavity of canines. Although there is some knowledge about the frequency of occurrence in canines, it is uncertain whether there is a correlation between its occurrence and lifestyle, health, or breed of dog. Samples of tooth plaque from a total of 131 canines were collected, cultured on selective media, and tested using physiological and molecular analyses to help discern the presence of C. canimorsus. Phylogenetic analyses determined that 49.2% of canines sampled carried a species of Capnocytophaga and 21.7% of the canines sampled in this study carried C. canimorsus. Statistical analyses found that male dogs and those that are neutered and spayed are more likely to host Capnocytophaga species. The data also suggested that breed was a statistically significant predictor of C. canimorsus, with the smaller breeds more likely to carry the potential pathogen. In addition, three "human" species of Capnocytophaga; C. ochracea, C. haemolytica, and one isolate of either C. gingivalis or C. granulosa were cultured from five canines. Sixteen canines sampled carried an unidentified Capnocytophaga species, with the sequences from all isolates forming a well-defined phylogenetic clade with 100% bootstrap support that may well represent a new species of Capnocytophaga.
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