Dermatitis Flashcards
Dermatitis is under what pathological process?
Inflammation and repair
A dermatitis that is superlative/pustular/exudation/neutrophilic is due to?
Bacterial
Auto-immunity
Dermatitis that is proliferative is due to?
Virus
Dermatitis that is vesicular is due to ?
Viral
Auto-immunity
A dermatitis that is granulomatous is due to
Mycobacteria
Fungal
Foreign substance
A dermatitis that is eosinophilic is due to
Allergy
Parasites
A dermatitis that are at the dermal-epidermal junction (interface) is due to
Auto-immunity
Pus in the skin is called
Pyoderma
Pyoderma that is superficial in the epidermis and the hair follicles can be due to what diseases?
Canine superficial spreading pyoderma/ bacterial folliculitis
Impetigo (pustular)
Greasy pig disease (staph hyicus)
Dermatophilosis
A deep pyoderma within the dermis can be due to what diseases
Bacterial furunculosis (eg dog with chin acne
Abscesses
What are predisposing factors for bacterial infection of skin
Disorders of keratinization
- endocrine disease
- chronic dermatitis -allergy or parasite
Immunodeficiency
Anatomical predisposition
What features of dogs skin makes bacterial infection common?
Thin stratus corneum
Lack of lipid seal of hair follicles
High skin pH
What is the most common bacteria infection skin
Staphylococcus spp
-produce exfoliating toxins that cause intraepidermal splitting
Non-follicular pustules which develop into crust often seen in prepubescent puppies
Impetigo
Skin fold pyoderma, where apposed surfaces cause frictional trauma leading to opportunistic bacterial infections
Intertrigo
In a dog you see..
Moist, alopecia, sightly raised well-circumscribed lesions with ulceration/crusting
Pyotraumatic dermatitis (hot spots)
What is the cause of potraumatic dermatitis?
Self trauma -> bacterial infection
-> underlying puritans (eg flea allergy dermatitis)
In a pig you see…
Erythema, pustules, crust
Greasy pig disease (exudation dermatitis)
Caused by staphylococcus hyicus