Changes

==Description==

==Description==

**Usually caused by [[Bacteroides|''Bacteroides nodosus'']] together with [[Fusobacterium|''Fusobacterium necrophorum'']]

A mild condition affecting sheep causing lameness. The disease is associated with under-running of the hoof and a typical 'odour'. Footrot is caused by [[Dichelobacter nodosus|''Dichelobacter 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.

Moisture and trauma allow''F. necrophorum'' to enter which aids bacterial penetration of the epidermis by ''D. nodosus'' invades resulting in necrosis and inflammation.  

**Contagious, economically important disease

It is an 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

==Signalment==

==Signalment==

==Pathology==

==Pathology==

**Grossly:

Grossly:

***Early lesions - red, moist, swollen, eroded interdigital skin  

Early lesions are red, moist, swollen and interdigital skin is eroded. This spreads to epidermal matrix of the hoof leading to separation of the horn and malodorous exudate.

***Spreads to epidermal matrix of hoof -> separation of horn + malodorous exudate

Regeneration is attempted as germinal epithelium is not destroyed.

***Regeneration attempted as germinal epithelium is not destroyed

Chronic infections can result in a long misshapen hoof.

***Chronic infections -> long , misshapen hoof

**Benign footrot (scald)- only interdigital skin 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

[[Category:To_Do_-_Caz]]

[[Category:To_Do_-_Caz]]