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| − | ===[[Deep pyoderma]]=== | + | ===[[Deep Pyoderma]]=== |
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| − | *Less common than superficial pyoderma
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| − | *Occurs mainly in dogs
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| − | *Affects infundibulum, isthmic portion of hair follicles and surrounding dermis and subcutis
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| − | *Heals with scarring
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| − | *Local lymph nodes are often affected
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| − | *Often secondary to immunosuppression, follicular hyperkeratosis or [[Parasitic skin infections - Pathology#Demodicosis|demodicosis]]
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| − | *May also be a sequele to [[Bacterial skin infections - Pathology#Superficial pyoderma|superficial pyoderma]]
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| − | *Grossly:
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| − | **[[Skin Glossary - Pathology|Crusted papules, pustules, alopecia, abscesses, nodules, fistulas, ulcers, haemorrhagic bullae]]
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| − | **In dogs may look similar to [[Pyotraumatic Dermatitis|pyotraumatic dermatitis]]
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| − | *Microscopically:
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| − | **Pyogranulomatous folliculitis and furunculosis
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| − | **Nodular or diffuse dermatitis
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| − | **Panniculitis
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| − | *May involve a foreign bodey reaction to follicular contents and draining sinuses develop
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| − | *If chronic, scarring and loss of adnexa
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| − | *Bacteria often isolated include [[:Category:Staphylococcus species|''Staphylococcus'' spp.]], especially ''S. intermedius'' in dogs, [[:Category:Streptococcus species|''Streptococcus'' spp.]], ''[[Corynebacterium pseudotuberculosis]]'', [[:Category:Pseudomonas and Burkholderia species|''Pseudomonas'']], [[:Category:Pasteurella and Mannheimia species|''Pasteurella'']], [[Proteus|''Proteus'']], [[Escherichia coli|''E.coli'']]
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| − | ====[[Staphylococcal Folliculitis and Furunculosis]]====
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| − | ====[[Subcutaneous Abscesses]]====
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| − | *Purulent exudate within dermis and subcutis
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| − | *Commonly occurs in cats due to contamination of penetrating wounds
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| − | *Surrounding wall of collagen and fibroblasts may develop
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| − | *Common bacteria (often normal mouth flora)
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| − | **[[Pasteurella multocida|''Pasteurella multocida'']], [[Fusobacterium necrophorum|''Fusobacterium'' spp.]], [[:Category:Streptococcus species|beta - haemolytic streptococci]], [[Bacteroides|''Bacteroides'']]
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| − | [[Category:Integumentary System - Bacterial Infections]]
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