Difference between revisions of "Stephanofilaria stilesi"
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| − | + | ==Stephanofilaira stilesi== | |
| − | + | *Dermall lesions of cattle in USA | |
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| − | == | + | ===Lifecycle=== |
| + | *The infective larvae develop in the horn fly - Haematobia irritans | ||
| + | **Flies ingest microfilaria as they feed on cutaneous lesions. | ||
| + | **Microfilaria develop into L3 larvae in the hornfly over 18-21 days. | ||
| + | **Infective L3 larva are deposited into the skin when the fly bites again, where they grow into adult worms. | ||
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| − | + | ===Gross pathology=== | |
| + | *Lesions begin as small circular patches on the ventral midline with serous exudate. | ||
| + | *These enlarge and coalesce producing lesions 25cm or more in diameter. | ||
| + | *Hemorrhage develops along the periphery while the older, central areas develop scabs or dry crusts. | ||
| + | *Healing lesions are alopecic, lichenified plaques. | ||
| + | *Lesions may also occur on the flank, udder, teats, face and neck. | ||
| − | == | + | ==Stephanofilaria assamensis== |
| − | + | *'Humpsore' | |
| − | + | *''Bos indicus'' in India | |
| − | + | * | |
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Revision as of 09:46, 6 July 2006
Stephanofilaira stilesi
- Dermall lesions of cattle in USA
Lifecycle
- The infective larvae develop in the horn fly - Haematobia irritans
- Flies ingest microfilaria as they feed on cutaneous lesions.
- Microfilaria develop into L3 larvae in the hornfly over 18-21 days.
- Infective L3 larva are deposited into the skin when the fly bites again, where they grow into adult worms.
Gross pathology
- Lesions begin as small circular patches on the ventral midline with serous exudate.
- These enlarge and coalesce producing lesions 25cm or more in diameter.
- Hemorrhage develops along the periphery while the older, central areas develop scabs or dry crusts.
- Healing lesions are alopecic, lichenified plaques.
- Lesions may also occur on the flank, udder, teats, face and neck.
Stephanofilaria assamensis
- 'Humpsore'
- Bos indicus in India