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Colorado reports plague activity in six counties The Colorado Department of Public Health and Environment (CDPHE) is now reporting laboratory confirmed reports of plague in animals and fleas from six counties– San Miguel County, El Paso County, Boulder County, Huerfano County, Adams County and La Plata County, where a 10-year-old girl died from the bacterial disease, the first person to die from plague in Colorado since 2015.

plague
Oriental rat flea, Xenopsylla cheopis/CDC
“In Colorado, we expect to have fleas test positive for plague during the summer months. Awareness and precautions can help prevent the disease in people. While it’s rare for people to contract plague, we want to make sure everyone knows the symptoms. The disease is treatable if caught early. Let a medical provider know if you think you have symptoms of plague or if you think you’ve been exposed,” said Jennifer House, Deputy State Epidemiologist and Public Health Veterinarian for CDPHE.

Plague is caused by bacteria (Yersinia pestis) that can be transmitted to humans by the bites of infected fleas or by direct contact with infected animals. Plague is frequently detected in rock squirrels, woodrats, and other species of ground squirrels and chipmunks. Prairie dogs are very susceptible to plague. Since they are active above ground, if they suddenly disappear, they serve as a visible alert that plague may be present. If you notice decreased rodent activity in an area where you normally see active rodents, contact your local public health agency. Residents should not kill prairie dogs on their property. If plague is present this could increase the risk of transmission and contracting plague.

Pets can also be infected with plague by infected fleas. The use of veterinary-approved flea control products is strongly advised.

If detected early in infection, plague is treatable in both people and pets. Symptoms include the sudden on-set of high fever and/or swollen lymph nodes.

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The risk of contracting certain animal-borne diseases, while present year-round, increases during the summer when humans and animals are frequently in close contact. Most human plague cases are acquired directly from fleas. Control the presence of wildlife and fleas around homes through the following measures:

Avoid fleas. Protect pets with a veterinary approved flea treatment and keep them on a leash and out of wild rodent habitats.
Stay out of areas where wild rodents live. If you enter areas inhabited by wild rodents, wear insect repellent and tuck your pant cuffs into your socks to prevent flea bites.
Avoid all contact with wild rodents, including squirrels. Do not feed or handle them.
Do not touch sick or dead animals.
Prevent rodent infestations around your house by clearing plants and materials away from outside walls, reducing access to food items, and setting traps.
Consult with a professional pest control company to treat the area around your home for fleas.
Contact a veterinarian if your pet becomes ill with a high fever and/or an abscess (i.e. open sore) or swollen lymph nodes. Pets with plague can transmit the illness to humans.
Children should be aware of these precautions and know to tell an adult if they have had contact with a wild animal or were bitten by fleas.

Colorado reports plague activity in six counties

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