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Yersinia pestis
Yersinia pestis
Oriental rat flea (Xenopsylla cheopis) infected with the Y. pestis bacterium, which appears as a dark mass in the gut: The foregut (proventriculus) of
Oriental rat flea (Xenopsylla cheopis) infected with the Y. pestis bacterium, which appears as a dark mass in the gut: The foregut (proventriculus) of this flea is blocked by a Y. pestis biofilm; when the flea attempts to feed on an uninfected host, Y. pestis is regurgitated into the wound, causing infection.
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Microscopic image of gram-negative Pseudomonas aeruginosa bacteria (pink-red rods)
Microscopic image of gram-negative Pseudomonas aeruginosa bacteria (pink-red rods)