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adult male Oropsylla Montana flea | by kat m research
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adult male Oropsylla Montana flea

5634, CDC

 

This flea is a common ectoparasite of the rock squirrel, Citellus variegatus, and in the western United States, is an important vector for the bacterium Yersinia pestis, the pathogen responsible for causing plague.

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Taken on April 1, 2009