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==Description==

==Description==

[[Image:Dirofilaria immitus.jpg|thumb|right|150px|''Dirofilaria immitus'' - Courtesy of the Laboratory of Parasitology, University of Pennsylvania School of Veterinary Medicine]]

[[Image:Dirofilaria immitus.jpg|thumb|right|200px|''Dirofilaria immitus'' - Courtesy of the Laboratory of Parasitology, University of Pennsylvania School of Veterinary Medicine]]

''Dirofilaria immitis'' is a nematode parasite that causes heartworm disease in dogs, cats and ferrets. Heartworm

''Dirofilaria immitis'' is a nematode parasite that causes heartworm disease in dogs, cats and ferrets. Heartworm