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Category:Trichostrongyloidea (view source)
Revision as of 21:57, 21 April 2010
, 21:57, 21 April 2010no edit summary
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== General Appearance ==
[[Image:Trichostrongylus.jpg|thumb|right|150px|''Trichostrongylus'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
*Bursate
*Most members of this superfamily look like short lengths of cotton (typically 0.5-2cm)
*The spicules of each species have a characteristic shape
*The heads have no distinct features
== General Life-Cycle ==
*The egg is approximately 80µm long, oval, thin-shelled, contains 4-16cells (i.e. it is a typical strongyle egg)
*Egg → L1 → L2 → L3 (this occurs on the ground)
*L1 and L2 feed on bacteria
*L3 is the infective stage
*L3 is ensheathed (i.e. the L2 cuticle is retained after moulting as an "outer skin")
*L3 cannot feed, but contains a finite amount of stored food to provide energy for movement
*Infection is by ingestion of the L3
*L3 → L4 → adult (this occurs in the stomach or small intestine)
*Parasitic development initially occurs in gastric glands or intestinal crypts (depending on species)
*Adults are situated on the mucosal surface
*The prepatent period is typically about 3 weeks
[[Category:Bursate_Nematodes]]
[[Category:Bursate_Nematodes]]