A dog from northern Colorado was euthanized after it tested positive for the plague.
Larimer County Public Health officials said the canine was at the Colorado State University Veterinary Teaching Hospital for four days last week after it tested positive for Yersinia pestis, the bacteria that causes plague.
There is no plague risk to the general public or anyone at CSU, said Katie O'Donnell who works with Larimer County Public Health.
Students and staff at the Fort Collins veterinary clinic who treated the dog were identified and health officials are working with those people for preventative measures based on how much contact they had with the dog.
Anyone who was exposed to the dog does not pose a health risk to anyone else, unless they begin to show illness, such as high fever.
Officials believe the dog might've contracted the disease when it sniffed a dead prairie dog a few days before it was admitted to the veterinarian.
In 2017, six other domestic pets got the plague.
Larimer County Public Health officials stressed that the plague rarely developed in humans and is treatable if caught early.