Lone Tree Veterinary Medical Center
“We believe that all pets deserve to have a good life.”Heartworm Disease – What Is It and What Causes It?
Heartworm disease is caused by a parasite, dirofilaria immitis, which is transmitted by mosquitos. A mosquito can pick up the parasite in its microscopic stage by feeding on an infected animal, such as a dog, cat, coyote, raccoon, opossum, or wolf.
Once inside the pet's body, the microfilaria travel through the blood stream and take up residence in the heart, lungs, and accompanying blood vessels. Over a period of several months to a year, the worms can grow up to 12 inches in length. They wreak havoc on the pet's internal organs, causing significant damage and suffering. If not treated, the pet will eventually die.
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