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| + | #REDIRECT[[:Category:Filarioidea]] |
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| − | The filarial worms are of great importance in human medicine in the tropics, causing diseases such as elephantitis and river blindness, but their veterinary interest is limited - with the important exception of ''Dirofilaria'', the canine heartworm, which is a major cause of morbidity and death in warmer, humid regions (including parts of the USA, Australia, southern Europe etc.).
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| − | == General Appearance ==
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| − | *Non-bursate
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| − | *Typically, they are long (up to 12cm or more), but filamentous
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| − | *Live in connective tissues
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| − | **The most important veterinary species is ''Dirofilaria immitis'' which lives in the right heart and pulmonary arteries
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| − | == General Life-Cycle ==
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| − | *The females of most species do not produce eggs, but instead they produce motile embryos ('''microfilariae''')
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| − | *Female worm → microfilariae → accumulate in blood or tissue fluid
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| − | → taken up by biting arthropod intermediate host
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| − | → L1 → L2 → L3
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| − | → enters wound
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| − | → larvae develop and migrate to predilection site in final host
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| − | [[Dirofilaria immitis]]
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| − | [[Onchocerca spp.]]
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| − | [[Parafilaria spp.]]
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| − | [[Setaria spp.]]
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| − | [[Elaeophora scheideri]]
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| − | [[Stephanofilaria spp.]]
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| − | *''Filaroides osleri'' causes infection in [[Respiratory Parasitic Infections - Pathology#Filaroides osleri|trachea]]in gogs
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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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| − | [[Category:Non-Bursate_Nematodes]] | |