|
|
| (5 intermediate revisions by the same user not shown) |
| Line 8: |
Line 8: |
| | | | |
| | </b></big> | | </b></big> |
| − | |logo = | + | |logo =path-logo.png |
| | }} | | }} |
| − |
| |
| − |
| |
| − | ===Hyperplastic===
| |
| − | ====[[Polychlorinated Napthalene Poisoning]]====
| |
| − | ===Papular===
| |
| − | ====Orf====
| |
| − | *[[Poxviridae|Pox]] infection
| |
| − | *Quite a common '''zoonotic''' disease
| |
| − | Papular proliferative pathology
| |
| − | =====Clinical=====
| |
| − | *In sheep produces a proliferative nodule/papular mass on [[Lips - Anatomy & Physiology|lips]]
| |
| − | *In flocks in which it is endemic it is seen in lamb
| |
| − | *If flock is non-immune seen in ewes too but much worse in lambs (may spread to inside of mouth)
| |
| − | *Can spread to udder of ewe
| |
| − |
| |
| − | =====Pathology=====
| |
| − | *Poxvirus infections produce local infection of [[prickle cells]] in epithelium with proliferation of cells and formation of papule followed by ulceration / necrosis and covered by necrotic epithelium
| |
| − | *Eventually scabs form and crust drops off
| |
| − | *Scabs - very infectious ( N.B.if touch -> catch it)
| |
| − |
| |
| − | ====Bovine Papular stomatitis====
| |
| − | [[Image:BPS.gif|right|thumb|125px|<small><center>Ring Zone Lesions of BPS - Calf (Courtesy of Alun Williams (RVC))</center></small>]]
| |
| − | *Parapox virus
| |
| − | *Very similar disease to orf but seen in cattle and generally milder condition.
| |
| − | *'''Must be differentiated from [[#Foot and Mouth disease|Foot and Mouth Disease]] and [[#Bovine Viral Diarrhoea / Mucosal disease|Mucosal Disease.]]'''
| |
| − | *Sporadic, in cattle, less than 1 year old.
| |
| − | *Develop papules on the muzzle, external nares and in the [[Oral Cavity Overview - Anatomy & Physiology|oral cavity]]; the [[Oesophagus - Anatomy & Physiology|oesophagus]] and [[Stomach and Abomasum - Anatomy & Physiology|forestomachs]] may also be affected.
| |
| − | *Usually heals spontaneously.
| |
| − | =====Pathogenesis=====
| |
| − | *The early lesions are round areas of intense congestion up to 1.5 cm in diameter.
| |
| − | *The centre becomes necrotic and slightly depressed.
| |
| − | *Slow peripheral extension of this lesion gives a classical ring zone formation with concentric rings of
| |
| − | **yellow (necrosis),
| |
| − | **grey (epithelial hyperplasia)
| |
| − | **red (congestion).
| |
| − | =====Histology=====
| |
| − | *There are focal areas of hydropic degeneration in the stratum spinosum
| |
| − | *Large eosinophilic intracytoplasmic inclusion
| |
| − | *Epidermis is markedly thickened.
| |
| − | *The superficial layers of the epithelium become necrotic and slough.
| |
| − | *''Vesicle formation is not a feature of this disease.''
| |
| − |
| |
| − | ====Papilloma====
| |
| − |
| |
| − | ===Neoplastic===
| |
| − | ====Squamous cell carcinoma====
| |
| − | [[Image:oral squamous cell carcinoma.jpg|right|thumb|125px|<small><center>'''Oral squamous cell carcinoma'''. Courtesy of T. Scase</center></small>]] neoplastic
| |
| − |
| |
| − |
| |
| | | | |
| | | | |
| | | | |
| | [[Category:Oral_Cavity_and_Gingiva_-_Pathology]] | | [[Category:Oral_Cavity_and_Gingiva_-_Pathology]] |
