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  • Title: Rickettsia felis and species of fleas parasitizing on household dogs in the Central Highlands of Vietnam.
    Author: Nguyen VT, Nguyen HQ, Nguyen VT, Ng-Nguyen D.
    Journal: Comp Immunol Microbiol Infect Dis; 2023 Jan; 92():101926. PubMed ID: 36473364.
    Abstract:
    Rickettsia felis is an obligate intracellular gra m-negative bacterium that belongs to the family of Rickettsiaceae. Ctenocephalides felis, cat flea, is the primary vector of the bacteria. The flea is the most common ectoparasite in dogs and associated with flea-borne spotted fever in humans. Information on R. felis and flea species parasitizing on dogs in Vietnam is limited. This study aimed to identify the species of fleas collected from dogs in the Central Highlands of Vietnam and detected the existence of R. felis in these fleas utilizing molecular tools. Morphological identification of 1618 fleas and molecular confirmation revealed the predominance of C. felis orientis parasitizing on dogs in the Central Highlands of Vietnam. Sixty-eight out of 100 fleas collected from household dogs were positive for spotted fever group rickettsiae; whilst R. felis was detected in 97.06 % (66/68) of C. felis orientis and C. felis felis. The results of this study indicate the potentially high risk of R. felis infection to humans and animals.
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