Difference between revisions of "Trichostrongyloidea"

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#REDIRECT[[:Category:Trichostrongyloidea]]
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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]]
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*Bursate
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*Most members of this superfamily 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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*L1 and L2 feed on bacteria
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*L3 is the infective stage
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*L3 is ensheathed (i.e. the L2 cuticle is retained after moulting as an "outer skin")
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*L3 cannot feed, but contains a finite amount of stored food 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 situated on the mucosal surface
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*The prepatent period is typically about 3 weeks
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<big>
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'''[[Ostertagia]]
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'''[[Nematodirus]]
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'''[[Dictyocaulus]]
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</big>
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[[Category:Bursate Nematodes]]
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[[Category:Trichostrongyloidea]]

Revision as of 21:06, 21 April 2010



General Appearance

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

Ostertagia

Nematodirus

Dictyocaulus