Difference between revisions of "Bacterial skin infections - Pathology"

Revision as of 19:11, 21 February 2011

Cutaneous bacterial infections tend to be called pyodermas. They are superficial, deep and are common in dogs, but less common in other species.

Salmonellosis
- Capillary dilatation and congestion -> cyanosis of external ears and abdoman
- Thrombosis -> necrosis of extremities
Erysipelas in pigs
- Caused by Erysipelothrix rhusiopathiae
- Vasculitis, thrombosis, ischaemia -> cutaneous lesions - firm, raises, rhomboidal pink to dark purple areas
Clostridium novyi
- Severe cellulitis, toxaemia and death of young rams during breeding season (due to traumatised heads) - 'big head'
Streptococcus equi
- In horses
- Immune complex vasculitis -> purpura

@@ Line 12: / Line 12: @@
-====[[Bacterial Granulomatous Dermatitis]]====
-*Usually due to saprophytes
-*Grossly:
-**Diffuse or nodular lesions
-**May ulcerate and form drainage fistulas
-*Microscopically:
-**Macrophages +/- multinucleated giant cells
-**[[Necrosis - Pathology#Caseation Necrosis|Caseous necrosis]] and [[Neutrophils|neutrophils]]
-*'''Mycobacterial granulomatous or pyogranulomatous lesions'''
-**Usually caused by ''[[Mycobacterium lepraemurium]]'' (feline leprosy) or other ''Mycobacteria''
-**Most commonly lesions appear on head, neck and legs
-*'''[[Botryomycosis]]'''
-[[Category:Integumentary System - Bacterial Infections]]
 ===[[Bacterial Pododermatitis]]===