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KMID : 1004820110120010055
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Journal of Biomedical Research
2011 Volume.12 No. 1 p.55 ~ p.60
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Pathologic Features of a Systemic Dirofilariasis in a Dog
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Lee Tae-Jin
Go Du-Min
Kim Tae-Wang
Youm So-Young
Shin Sang-Kyung
Chang Dong-Woo
Ahn Byeong-Woo
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Abstract
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Canine heartworm disease is typically characterized by the presence of heartworms in the pulmonary artery and, to a lesser degree, the right ventricle. Systemic arterial dirofilariasis is an unusual manifestation of heartworm disease of dogs that results from aberrant migration of Dirofilaria immitis into the peripheral arterial circulation. A three-year-old Jindo dog was referred to the Veterinary Medical Center because of hindlimb lameness, paresthesia of hindlimbs, and interdigital ischemic necrosis. Angiography and ultrasonography were performed, resulting in diagnosis of heartworm infestation. In necropsy, entangled heartworms were present throughout the body, including lungs, kidney, small intestinal lumen, and arteries, in addition to the right ventricle and pulmonary artery. Histologically, lung showed adult heart worms in vessels, organized thrombotic vessels, and interstitial pneumonia featuring type II pneumocyte hyperplasia, thickened alveolar wall, and compressed alveolar spaces. Chronic parenchymal lesions, such as focal or diffuse necrosis, fibrosis, and dystrophic calcification were remarkable in liver and kidney. The current case showed a typical canine systemic heartworm disease caused by aberrant migration of Dirofilaria immitis.
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KEYWORD
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Dirofilaria immitis, Systemic infection of heartworm
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