What is the bubonic plague?
caused by Yersinia pestis , carried by flea vector . transmitted from reservoir host to amplifying host to humans. bubonic plague the plague bacillus enters the lymph system leads to bubo s swollen lymph node lasts 2-8 days then fever, chills, h/a, nausea, weakness, tender bubo. septicemic plague is massive bacterial growth in the blood, its virulence factors create the darken skin aka black death. Pneumonic plague is localized to lungs, highly infectious thru sputum and aerosols