Deep Pyoderma
Revision as of 19:10, 21 February 2011 by Bara (talk | contribs) (Created page with "*Less common than superficial pyoderma *Occurs mainly in dogs *Affects infundibulum, isthmic portion of hair follicles and surrounding dermis and subcuti...")
- Less common than superficial pyoderma
- Occurs mainly in dogs
- Affects infundibulum, isthmic portion of hair follicles and surrounding dermis and subcutis
- Heals with scarring
- Local lymph nodes are often affected
- Often secondary to immunosuppression, follicular hyperkeratosis or demodicosis
- May also be a sequele to superficial pyoderma
- Grossly:
- Microscopically:
- Pyogranulomatous folliculitis and furunculosis
- Nodular or diffuse dermatitis
- Panniculitis
- May involve a foreign bodey reaction to follicular contents and draining sinuses develop
- If chronic, scarring and loss of adnexa
- Bacteria often isolated include Staphylococcus spp., especially S. intermedius in dogs, Streptococcus spp., Corynebacterium pseudotuberculosis, Pseudomonas, Pasteurella, Proteus, E.coli
Staphylococcal Folliculitis and Furunculosis
Subcutaneous Abscesses
- Purulent exudate within dermis and subcutis
- Commonly occurs in cats due to contamination of penetrating wounds
- Surrounding wall of collagen and fibroblasts may develop
- Common bacteria (often normal mouth flora)