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[[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|150px|''Dirofilaria immitus'' - Courtesy of the Laboratory of Parasitology, University of Pennsylvania School of Veterinary Medicine]]
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''Dirofilaria immitis'':
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Dirofilaria is a filarial worm. Female worms measure up to 30cm in length and males up to 15cm. The worms have a life-span of 5-7 years. Up to 250 worms may establish in the heart and [[Respiratory Parasitic Infections - Pathology#Dirofilaria immitis|pulmonary arteries]] of dogs and cats.
*a filarial worm
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Dirofilaria worms produce microfilariae, not eggs.
*females: up to 30cm long; males: up to 15cm long
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*life-span 5-7years
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*up to 250 worms may establish in the heart and pulmonary arteries
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*produce microfilariae, not eggs.
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*May cause [[Muscles Degenerative - Pathology#Ischaemia|muscle ischaemia]] in dogs due to arteritis and thrombosis of external iliac arteries and their branches
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*''Dirofilaria immitis'' live in heart and [[Respiratory Parasitic Infections - Pathology#Dirofilaria immitis|pulmonary arteries]] of dogs and cats
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'''Microfilariae''':
 
'''Microfilariae''':
1,473

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