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| + | #REDIRECT[[:Category:Trichinelloidea]] |
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| − | {{toplink
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| − | |backcolour =
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| − | |linkpage =Parasites
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| − | |linktext =PARASITES
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| − | |pagetype=Bugs
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| − | |sublink1=Nematodes
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| − | |subtext1=NEMATODES
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| − | }}
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| − | <br>
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| − | The common feature of members of this group is that the oesophagus is a column of doughnut-shaped cells. They are only distantly related to the other nematode groups and so drugs developed primarily for controlling strongyle and ascarid worms are often less effective against these.
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| − | There are just three genera of veterinary importance:
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| − | 1) '''Trichuris''' (the whipworms)
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| − | 2) '''Capillaria'''
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| − | 3) '''Trichinella'''
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| − | == ''Trichuris'' Species ==
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| − | *The whipworms have a stout posterior end and a long narrow neck, which is superficially inserted into the caecal mucosa. *Eggs are brown, barrel-shaped, with a plug at either end, and can survive for up to 12years.
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| − | *The infective stage is the embryonated egg.
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| − | *The life-cycle is direct.
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| − | *After the egg is swallowed, the larva initially forms a mucosal nodule before emerging into the lumen.
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| − | == ''Capillaria'' ==
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| − | *Similar to ''Trichuris'', but the difference between anterior and posterior ends of the body is not so pronounced.
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| − | *Some species have direct life-cycles, others use intermediate or transport hosts.
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| − | *Species have different predilection sites.
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| − | *Of greatest importance in birds, species do occur in the urinary bladder and liver of cats and dogs.
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| − | == ''Trichinella'' ==
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| − | *This is known as the "worm that thinks its a virus".
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| − | *It is a unique genus, and an important zoonosis.
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| − | [[Trichuris]]
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| − | *''Capillaria aerophila'' in [[Respiratory Parasitic Infections - Pathology#Capillaria aerophila|respiratory disease]] of cats and dogs
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| − | *''Trichinella'' in [[Muscles Inflammatory - Pathology#Nematodes|myositis]]
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