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. 2015 Mar 17;11(3):e1004734. doi: 10.1371/journal.ppat.1004734

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Fig 7 — Between 1 and 3 blocked fleas were exposed to the each ear of individual C57Bl/6 mice for 1 h. Mice that had at least one flea feed on one ear were euthanized 1 h post-flea exposure. The ears, ipsilateral mandibular and parotid lymph nodes and spleen were harvested, triturated and plated to determine Y. pestis CFU counts. The results of each individual feeding where bacteria were found in at least one tissue are shown. An * indicates a mouse with feeding events on each ear, thus CFU numbers in the spleen could reflect transmission in either or both ears. (A) the CFU data are shown as a percentage of the total CFU recovered from each tissue. (B) the raw CFU numbers found in each tissue are shown.