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Description:Xenopsylla cheopis, Oriental rat flea, with a proventricular plague mass.
During feeding, the flea draws viable Y. pestis organisms into its esophagus, which multiply and block the proventriculus just in front of the stomach, later forcing the flea to regurgitate infected blood unto the host when it tries to swallow.
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Content Providers(s):CDC
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Links:CDC - National Center for Emerging and Zoonotic Infectious Diseases; Division of Vector-Borne Infectious Diseases; Plague Home Page
CDC Organization
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.