5/1/17 – A case of plague has been identified in an adult male in Northern Arizona. As warmer weather approaches plague becomes a concern across the Southwest. Plague is caused by the bacteria Yersinia pestis, and circulates among rabbit and rodent populations. It is spread by the bite of infected fleas. Avoiding contact with wild rodents, and domestic animals that may have fleas, as well as avoiding areas where fleas may live are the best ways to protect yourself against plague. Seek medical attention or veterinary attention for your pet if signs of plague are suspected.