Abstract
Cat fleas (Ctenocephalides felis) are the most prevalent ectoparasites of pet animals with cosmopolitan distribution, obligatory hematophagous, and may prey on humans to receive bloodmeals. We studied the microbiota of 100 flea-pools, containing C. felis, and collected from equal number of cats and dogs in the region of Attica, Greece, including Athens. The 16S metagenomics technique detected Brucella spp. nucleotide sequence that was identified as Brucella melitensis DNA by a real-time PCR, in five flea-pools, corresponding to five cats, one owned and the remaining four stray, residing in semiurban and urban areas, respectively. No definite conclusions can be drawn as to the pathway that led to the presence of B. melitensis in common fleas parasitizing cats. We suspect flea or cat contact with wild rodents, ubiquitous in various environments, which participate in the B. melitensis biology. The proximity of the cats and their fleas with humans and previous observations of flea potential to transmit B. melitensis in laboratory animals warrant a more elaborate research as to the vectorial dynamics, the ecological pathways resulting in pathogen carriage, and the risk for public health.
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