Another cat has tested positive for bubonic plague in Wyoming, making it the third such case over the past six months.
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The latest case involved a cat in the small town of Kaycee, state health officials said. The other infected cats were in Sheridan and Campbell counties, CBS News reported.
No human cases of bubonic plague have been identified, but the disease can be passed from infected animals to people, health officials warn.
On average, there are seven human plague cases in the United States each year. The last known human case in Wyoming occurred in 2008, CBS News reported.
Plague, which occurs naturally in the areas of the western and southwestern U.S., is caused by a bacteria that's spread through the bite of fleas on infected rodents.
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