Difference between revisions of "Contagious Footrot"
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| − | + | ==Description== | |
| − | + | **Usually caused by [[Bacteroides|''Bacteroides nodosus'']] together with [[Fusobacterium|''Fusobacterium necrophorum'']] | |
| + | **Moisture and trauma allow Dichelobacter nodosus to enter -> aids bacterial penetration of epidermis -> ''F. necrophorum'' invades -> necrosis and inflammation. | ||
**Contagious, economically important disease | **Contagious, economically important disease | ||
**Wet pasture and hydrated stratum corneum leads to colonisation by Gram positive cocci and [[Arcanobacter pyogenes|''Arcanobacter pyogenes'']], followed by ''F. necrophorum''; addition of ''D. nodosus'' causes footrot | **Wet pasture and hydrated stratum corneum leads to colonisation by Gram positive cocci and [[Arcanobacter pyogenes|''Arcanobacter pyogenes'']], followed by ''F. necrophorum''; addition of ''D. nodosus'' causes footrot | ||
**Can lead to loss of hoof | **Can lead to loss of hoof | ||
| − | + | ==Signalment== | |
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| + | ==Pathology== | ||
**Grossly: | **Grossly: | ||
***Early lesions - red, moist, swollen, eroded interdigital skin | ***Early lesions - red, moist, swollen, eroded interdigital skin | ||
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**Benign footrot (scald)- only interdigital ski affected, slight separation of heel horn | **Benign footrot (scald)- only interdigital ski affected, slight separation of heel horn | ||
***Mostly the type occuring in cattle | ***Mostly the type occuring in cattle | ||
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[[Category:To_Do_-_Caz]] | [[Category:To_Do_-_Caz]] | ||
Revision as of 10:51, 5 August 2010
Description
- Usually caused by Bacteroides nodosus together with Fusobacterium necrophorum
- Moisture and trauma allow Dichelobacter nodosus to enter -> aids bacterial penetration of epidermis -> F. necrophorum invades -> necrosis and inflammation.
- Contagious, economically important disease
- Wet pasture and hydrated stratum corneum leads to colonisation by Gram positive cocci and Arcanobacter pyogenes, followed by F. necrophorum; addition of D. nodosus causes footrot
- Can lead to loss of hoof
Signalment
Pathology
- Grossly:
- Early lesions - red, moist, swollen, eroded interdigital skin
- Spreads to epidermal matrix of hoof -> separation of horn + malodorous exudate
- Regeneration attempted as germinal epithelium is not destroyed
- Chronic infections -> long , misshapen hoof
- Benign footrot (scald)- only interdigital ski affected, slight separation of heel horn
- Mostly the type occuring in cattle
- Grossly: