A pаtient visits there dоctоr аfter nоt feeling well on Mondаy morning with fever, headache, chills and painful swollen lymph nodes. The previous week the patient felt fine and felt that his sickness if sudden. He had been hiking with friends previously but failed to put on tick and flea repellent. After laboratory testing, results came back for bubonic plague. What type of bacteria causes bubonic plague?