Swollen lymph nodes termed “buboes” caused by plague bacteria (bubonic plague). (Photo credit: Wikipedia)
English: Main symptoms of bubonic plague. Sources are found in main article: Wikipedia:Black_death#Signs_and_symptoms. Model: Mikael Häggström. To discuss image, please see Template_talk:Häggström diagrams (Photo credit: Wikipedia)
Business Insider reports that health officials in Navajo County and Coconino County of Arizona confirmed that fleas tested positive for the Yersinia pestis bacteria that causes the plague.
Source: Fleas carrying the bubonic plague have been found in Arizona – Business Insider
For more precise information on the the Plague in the US see the CDC latest update.
For wider coverage and history of the Bubonic Plague & the Black Death, open this link.
Finally, if you like philosophical fiction, read the famous book, ‘The Plague’ by Albert Commus. ‘The Plague’, published in 1947, that tells the story of a plague sweeping the French Algerian city of Oran. Personally, I’ve had a phobia of rats ever since reading this book in my youth.