What is the cause of bubonic plague?
Bubonic plague is one of three types of bacterial infection caused by Yersinia pestis. Three to seven days after exposure to the bacteria flu like symptoms develop. This includes fever, headaches, and vomiting.Swollen and painful lymph nodes occur in the area closest to where the bacteria entered the skin.n the bubonic form of plague, the bacteria enter through the skin through a flea bite and travels via the lymphatics to a lymph node, causing it to swell. Diagnosis is by finding the bacterium in the blood, sputum, or fluid from lymph nodes.