Changes

===Papular===

===Papular===

====Orf====

====Orf====

*[[Parapox virus]] infection.

*[[Poxviridae|Pox]] infection

*Quite a common '''zoonotic''' disease.

*Quite a common '''zoonotic''' disease

=====Clinical=====

=====Clinical=====

*In sheep produces a proliferative nodule/papular mass on [[Lips - Anatomy & Physiology|lips]].

*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.

*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).

*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.

*Can spread to udder of ewe

=====Pathology=====

=====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. 

*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. 

*Eventually scabs form and crust drops off

*Scabs - very infectious ( N.B.if touch -> catch it).

*Scabs - very infectious ( N.B.if touch -> catch it)

 

====Bovine Papular stomatitis====

====Bovine Papular stomatitis====