Difference between revisions of "Trichostrongyloidea"
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== General Appearance == | == General Appearance == | ||
[[Image:Trichostrongylus.jpg|thumb|right|150px|''Trichostrongylus'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]] | [[Image:Trichostrongylus.jpg|thumb|right|150px|''Trichostrongylus'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]] | ||
| − | *Bursate | + | *Bursate |
| − | *Most members of this superfamily | + | *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 spicules of each species have a characteristic shape |
| − | *The heads have no distinct features | + | *The heads have no distinct features |
| − | |||
== General Life-Cycle == | == General Life-Cycle == | ||
| − | *The egg is approximately 80µm long, oval, thin-shelled, contains 4-16cells (i.e. it is a typical strongyle egg) | + | *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) | + | *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 | + | *Infection is by ingestion of the L3 |
| − | *L3 → L4 → adult (this occurs in the stomach or small intestine) | + | *L3 → L4 → adult (this occurs in the stomach or small intestine) |
| − | *Parasitic development initially occurs in gastric glands or intestinal crypts (depending on species) | + | *Parasitic development initially occurs in gastric glands or intestinal crypts (depending on species) |
| − | *Adults are on the mucosal surface | + | *Adults are situated on the mucosal surface |
| − | *The prepatent period is typically about | + | *The prepatent period is typically about 3 weeks |
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| − | |||
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[[Nematodirus]] | [[Nematodirus]] | ||
Revision as of 12:22, 9 January 2009
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This article is still under construction. |
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General Appearance
- 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
- Dictyocaulus viviparus causes parasitic bronchitis
- Dictyocaulus arnfieldi causes cough in horses