CASPER, Wyo. But don't worry too much, the last time a human in Wyoming contracted it was in 2008 which was one of six cases since 1978.
The cat was found in Johnson County and the other two cats found with the disease were found in Sheridan and Campell Counties.
The Health Department said it could be deadly for your pets if not treated with antibiotics.
Some symptoms in humans include fever, chills, coughing, difficulty breathing, and abdominal pain.
The health department says if you don't want to get the disease, avoid areas with rodents and use repellent with areas with fleas.