Difference between revisions of "Category:Strongyloidea"

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== General Appearance ==
 
== General Appearance ==
 
[[Image:Strongylus.jpg|thumb|right|150px|''Strongylus'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
 
[[Image:Strongylus.jpg|thumb|right|150px|''Strongylus'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
*Bursate
+
Strongyloid nematodes share a a number of morphological features. They are bursate, meaning that the males have a copulatory bursa. They are realtively short, typically 1 - 5mm, but stout in appearance with a large buccal capsule at the anterior end. The head or anterior also usually carries characteristic features such as teeth or cutting plates.
*Large buccal capsule
 
*Relatively short (typically 1-5cm) but stout
 
*Heads often have characteristic features - teeth or cutting plates
 
  
 
== General Life-Cycle ==
 
== General Life-Cycle ==
*Like that of the trichostrongyloids (eggs are also 'typical strongyle eggs'), but:
+
The life cycle of the strongyloids is typical of most nematodes. The L3 to adult development occurs in the large intestine where the L3 larvae penetrate the mucosal wall and form nodules. Some strongyle species larvae, such as those of ''Strongylus edentatus'' and ''Strongylus equinus'' have a migratory life cycle in which they travel through body organs and can cause [[Peritoneal Cavity - Parasitic Pathology|pathology]] before returning to the large intestine of the host.
**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 - Pathology#In sheep|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 - Parasitic Pathology|pancreas]]
 
 
 
''Syngamus laryngeus'' in [[Respiratory Parasitic Infections - Pathology#Syngamus laryngeus|larynx]] of cattle
 
 
 
  
 +
== Notable Species==
 +
Some species have been described in further detail and are linked above. Other species of some veterinary importance include ''Oesophagostomum columbianum'' which causes [[Peritonitis#In sheep|Peritonitis in sheep]] by penetration of intestines by larvae. ''Stephanuris dentatus'' causes [[Peritoneal Cavity - Parasitic Pathology|peritonitis]] in pigs  and may cause cysts in the [[Pancreas - Parasitic Pathology|pancreas]]
 
[[Category:Bursate_Nematodes]]
 
[[Category:Bursate_Nematodes]]
 +
[[Category:To_Do_-_Parasites]]

Latest revision as of 12:54, 29 November 2010


General Appearance

Strongylus - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona

Strongyloid nematodes share a a number of morphological features. They are bursate, meaning that the males have a copulatory bursa. They are realtively short, typically 1 - 5mm, but stout in appearance with a large buccal capsule at the anterior end. The head or anterior also usually carries characteristic features such as teeth or cutting plates.

General Life-Cycle

The life cycle of the strongyloids is typical of most nematodes. The L3 to adult development occurs in the large intestine where the L3 larvae penetrate the mucosal wall and form nodules. Some strongyle species larvae, such as those of Strongylus edentatus and Strongylus equinus have a migratory life cycle in which they travel through body organs and can cause pathology before returning to the large intestine of the host.

Notable Species

Some species have been described in further detail and are linked above. Other species of some veterinary importance include Oesophagostomum columbianum which causes Peritonitis in sheep by penetration of intestines by larvae. Stephanuris dentatus causes peritonitis in pigs and may cause cysts in the pancreas

Pages in category "Strongyloidea"

The following 6 pages are in this category, out of 6 total.