Difference between revisions of "Category:Spiruroidea"

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[[Image:Habronema.jpg|thumb|right|150px|''Habronema'' from horse faeces - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
 
[[Image:Habronema.jpg|thumb|right|150px|''Habronema'' from horse faeces - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
 
*Contains a few species of veterinary significance (e.g. ''Habronema'' and ''Thelazia'')
 
*Contains a few species of veterinary significance (e.g. ''Habronema'' and ''Thelazia'')
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*Various predilection sites
 
*Various predilection sites
  
=== ''HABRONEMA and DRASCHIA'' SPECIES ===
 
==== General ====
 
*Spiruroids occurring in stomach:
 
**''Habronema microstoma'' - worldwide.
 
**''Draschia megastoma'' - tropical/sub-tropical climates.
 
 
==== Morphology ====
 
*1.0-2.5cm long, slender white worms, flat spiral twist to male tail.
 
 
==== Life-Cycle ====
 
*Indirect LC, muscid fly intermediate hosts.
 
*Adults under layer of mucous in stomach (''Habronema'') or in large nodule (''Draschia'').
 
*Elongated embryonated eggs (50-60µm) passed in faeces.
 
*L1 ingested by fly larvae - develop to L3 as fly matures.
 
*L3 deposited on horse's lips as fly feeds - swallowed - mature to adult worms.
 
*Prepatent period = 2months.
 
*Larvae → "cutaneous habronemosis" or "summer sores":
 
**larvae laid on skin wound → large granulomata
 
**seasonal incidence
 
**affected horses may be difficult to work.
 
 
==== Pathogenicity ====
 
*Adult worms:
 
**''Habronema'' - mild gastritis (no mucosal invasion)
 
**''Draschia'' - tumour-like nodules may impair pyloric function.
 
  
==== Control ====
 
*Regular anthelmintic treatment (adults - not required; larvae - ivermectin).
 
*Cover or turn over dung heaps (to prevent access of flies to breeding sites or kill by composting).
 
  
 
[[Category:Non-Bursate_Nematodes]]
 
[[Category:Non-Bursate_Nematodes]]
[[Category:Horse_Nematodes]]
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[[Category:To_Do_-_Parasites]]

Latest revision as of 22:09, 25 June 2010

Habronema from horse faeces - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona
  • Contains a few species of veterinary significance (e.g. Habronema and Thelazia)
  • The male tail is a flat spiral
  • Spicules are unequal
  • Indirect life-cycle:
    • female worm → small narrow larvated eggs → arthropod intermediate host
  • Various predilection sites

Pages in category "Spiruroidea"

The following 3 pages are in this category, out of 3 total.