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| − | {{unfinished}}
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| − | {{toplink
| + | #REDIRECT[[:Category:Trichostrongyloidea]] |
| − | |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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| − | == General Appearance ==
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| − | [[Image:Trichostrongylus.jpg|thumb|right|150px|''Trichostrongylus'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]] | |
| − | *Bursate.
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| − | *Most members of this superfamily will look like short lengths of cotton (typically 0.5-2cm).
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| − | *The spicules of each species have a characteristic shape.
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| − | *The heads have no distinct features.
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| − | == General Life-Cycle ==
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| − | *The egg is approximately 80µm long, oval, thin-shelled, contains 4-16cells (i.e. it is a typical strongyle egg).
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| − | *Egg → L1 → L2 → L3 (this occurs on the ground).
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| − | *The L1 and L2 feed on bacteria.
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| − | *The L3 is the infective stage.
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| − | *The L3 is ensheathed (i.e. the L2 cuticle is retained after moulting as an "outer skin").
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| − | *The L3 cannot feed, but has a finite amount of food stored to provide energy for movement.
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| − | *Infection is by ingestion of the L3.
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| − | *L3 → L4 → adult (this occurs in the stomach or small intestine).
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| − | *Parasitic development initially occurs in gastric glands or intestinal crypts (depending on species).
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| − | *Adults are on the mucosal surface.
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| − | *The prepatent period is typically about 3weeks.
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| − | [[Nematodirus]]
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| − | *''Dictyocaulus viviparus'' causes [[Respiratory Parasitic Infections - Pathology#Dictyocaulus viviparus|parasitic bronchitis]]
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| − | *''Dictyocaulus arnfieldi'' causes [[Respiratory Parasitic Infections - Pathology#Dictyocaulus arnfieldi|cough in horses]]
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