Difference between revisions of "Category:Spiruroidea"
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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]] | ||
Revision as of 22:18, 26 April 2010
 |
This article is still under construction. |
- 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
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).
Pages in category "Spiruroidea"
The following 3 pages are in this category, out of 3 total.