Difference between revisions of "Strongyloidea"

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[[Image:Strongyloides larvae.jpg|thumb|right|150px|''Strongyloides'' larvae - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
 
[[Image:Strongyloides larvae.jpg|thumb|right|150px|''Strongyloides'' larvae - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
 
[[Image:Strongyloides.jpg|thumb|right|150px|''Strongyloides'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
 
[[Image:Strongyloides.jpg|thumb|right|150px|''Strongyloides'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
*Bursate.
+
*Bursate
*Relatively short (typically 1-5cm) but stout.
+
*Relatively short (typically 1-5cm) but stout
*Heads often have characteristic features.
+
*Heads often have characteristic features
 
 
  
 
== General Life-Cycle ==
 
== General Life-Cycle ==
Like that of the trichostrongyloids (eggs are also 'typical strongyle eggs'), but:
+
*Like that of the trichostrongyloids (eggs are also 'typical strongyle eggs'), but:
*L3 → L4 → adult (typically occurs in the large intestine).
+
**L3 → L4 → adult (typically occurs in the large intestine)
*Larvae penetrate into mucosal wall and elicit nodule formation.
+
**Larvae penetrate the mucosal wall and elicit nodule formation
*Larvae of some species migrate around the body.
+
**Larvae of some species migrate around the body
*Prepatent period varies between species from 3weeks to 6+ months.
+
**Prepatent period varies between species from 3 weeks to over 6 months
 
 
 
 
 
 
 
 
 
 
 
 
  
 
[[Strongylus vulgaris]]
 
[[Strongylus vulgaris]]

Revision as of 12:27, 9 January 2009



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PARASITES
NEMATODES



General Appearance

Strongyloides stercoralis - Courtesy of the Laboratory of Parasitology, University of Pennsylvania School of Veterinary Medicine
Strongyloides stercoralis - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona
Strongyloides larvae - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona
Strongyloides - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona
  • Bursate
  • Relatively short (typically 1-5cm) but stout
  • Heads often have characteristic features

General Life-Cycle

  • Like that of the trichostrongyloids (eggs are also 'typical strongyle eggs'), but:
    • L3 → L4 → adult (typically occurs in the large intestine)
    • Larvae penetrate the mucosal wall and elicit nodule formation
    • Larvae of some species migrate around the body
    • Prepatent period varies between species from 3 weeks to over 6 months

Strongylus vulgaris

Peritonitis in sheep by penetration of intestines by larvae of Oesophagostomum columbianum

Strongylus edentatus and Strongylus equinus migrate through Peritoneal Cavity Parasitic - Pathology

Stephanuris dentatus causes peritonitis in pigs Peritoneal Cavity Parasitic - Pathology and may cause cysts in the pancreas

Syngamus laryngeus in larynx of cattle