Difference between revisions of "Category:Spiruroidea"

Revision as of 21:33, 28 April 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

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

@@ Line 10: / Line 10: @@
 *Various predilection sites
-=== ''HABRONEMA and DRASCHIA'' SPECIES ===
-==== General ====
-*Spiruroids occurring in stomach:
-**''Habronema microstoma'' - worldwide.
-**''Draschia megastoma'' - tropical/sub-tropical climates.
-==== Morphology ====
+[[Habronema and Draschia spp.]]
-*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:Horse_Nematodes]]