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| + | [[Category:Trichostrongyloidea]] |
| − | [[Image:Trichostrongylus.jpg|thumb|right|150px|''Trichostrongylus'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
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| − | ==Introduction==
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| − | Trichostrongyloidea are a bursate [[Nematodes|nematodes]], with ''[[Dictyocaulus]]'' forming the only exception. Important genera include ''[[Ostertagia]]'', ''[[Haemonchus]]'' and ''Trichostrongylus.''
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| − | == General Life-Cycle ==
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| − | The life cycle of Trichostrongyloidea is direct, and infection is through ingestion of L3.
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| − | The egg is approximately 80µm long, oval, thin-shelled, and containing 4-16 cells, so is a typical strongyle egg.
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| − | Egg → L1 → L2 → L3 occurs on the ground. L1 and L2 feed on bacteria, and L3 is exsheathed and represents the infective stage. L3 cannot feed, but do contain a finite amount of stored food to provide energy for movement. Infection is via ingestion of the L3. L3 → L4 → adult, these stages generally occur in the stomach or small intestine.
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| − | Parasitic development initially occurs in gastric glands or intestinal crypts, species dependent. Adults are generally found on the mucosal surface, and the prepatent period is typically about 3 weeks.
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| − | {{Learning
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| − | |literature search = [http://www.cabdirect.org/search.html?q=id:(%22Trichostrongyloidea%22)+AND+title:(%22life+cycle%22) Trichostrongyloidea life cycle publications]
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| − | {{review}}
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| − | [[Category:Trichostrongyloidea|A]] | |
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| − | [[Category:Expert Review]]
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