Keywords: Ulceration of flea bite cause by yersinia pestis.jpg en Ulceration of a bite from a flea infected with the yersinia pestis bacteria 2011-12-10 http //emedicine medscape com/article/967495-overview a0104 Jack Poland PhD Centers for Disease Control and Prevention CDC Fort Collins Colorado PD-USGov Yersinia pestis Uploaded with UploadWizard Flea bites Skin ulcers |