Heartworm disease in the dog
Abstract
"Heartworm disease in the dog is an ailment of the heart and pulmonary arteries caused by the presence of adult worms of the nematode Dirofilaria immitus. These thin, thread-like worms reach a size of 10 to 12 inches long. The disease results in interference with blood circulation and the reaction of the heart and lungs to the presence of the adult worms. The most common signs of heartworms are a cough, shortness of breath, lack of energy, and collapse. After locating in the heart and pulmonary arteries, the adult heartworms produce a large number of mircoscopic offspring, mircofilaria, which circulate through the blood stream."--First page.
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