Mosquito-Borne Dog Heartworm Disease
J. K. Nayar and C. R. Connelly
Each year thousands of dogs become disabled or die from lung, heart, or circulatory problems caused by heartworm disease. Heartworm disease in dogs and related canines is caused by a filarial nematode (a large thread-like round worm), Dirofilaria immitis. The adult worms live in the right side of the heart in the right ventricle and adjacent blood vessels (pulmonary arteries). Because of their location, they are commonly called "dog heartworms."
