Difference between revisions of "Trichostrongyloidea"
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| + | == General Appearance == | ||
| + | *Bursate. | ||
| + | *Most members of this superfamily will 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. | ||
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| + | == 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). | ||
| + | *The L1 and L2 feed on bacteria. | ||
| + | *The L3 is the infective stage. | ||
| + | *The L3 is ensheathed (i.e. the L2 cuticle is retained after moulting as an "outer skin"). | ||
| + | *The L3 cannot feed, but has a finite amount of food stored 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 on the mucosal surface. | ||
| + | *The prepatent period is typically about 3weeks. | ||
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[[Nematodirus]] | [[Nematodirus]] | ||
*''Dictyocaulus viviparus'' causes [[Respiratory Parasitic Infections - Pathology#Dictyocaulus viviparus|parasitic bronchitis]] | *''Dictyocaulus viviparus'' causes [[Respiratory Parasitic Infections - Pathology#Dictyocaulus viviparus|parasitic bronchitis]] | ||
*''Dictyocaulus arnfieldi'' causes [[Respiratory Parasitic Infections - Pathology#Dictyocaulus arnfieldi|cough in horses]] | *''Dictyocaulus arnfieldi'' causes [[Respiratory Parasitic Infections - Pathology#Dictyocaulus arnfieldi|cough in horses]] | ||
Revision as of 00:27, 23 December 2008
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This article is still under construction. |
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General Appearance
- Bursate.
- Most members of this superfamily will 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).
- The L1 and L2 feed on bacteria.
- The L3 is the infective stage.
- The L3 is ensheathed (i.e. the L2 cuticle is retained after moulting as an "outer skin").
- The L3 cannot feed, but has a finite amount of food stored 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 on the mucosal surface.
- The prepatent period is typically about 3weeks.
- Dictyocaulus viviparus causes parasitic bronchitis
- Dictyocaulus arnfieldi causes cough in horses