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Created page with '*Usually involves Type I reaction and Type IV reaction due to salivary antig…'
*Usually involves [[Skin Immunologic - Pathology#Type I reactions|Type I reaction]] and [[Skin Immunologic - Pathology#Type IV reactions|Type IV reaction]] due to salivary antigens of ''Culicoides'' sp.
*May be seasonally recurring or continuous depending on climate
*Grossly:
**Papules, crusts, alopecia, excoriations, lichenification
*Microscopically:
**Superficial and dep perivascular dermatitis
**Many eosinophils
**Epidermal hyperplasia
**Hyperkeratosis
**Dermal fibrosis
**Possibly eosinophilic folliculitis, intraepidermal pustules and [[Skin Other - Pathology#Eosinophilic granuloma|eosinophilic granulomas]]
*May be seasonally recurring or continuous depending on climate
*Grossly:
**Papules, crusts, alopecia, excoriations, lichenification
*Microscopically:
**Superficial and dep perivascular dermatitis
**Many eosinophils
**Epidermal hyperplasia
**Hyperkeratosis
**Dermal fibrosis
**Possibly eosinophilic folliculitis, intraepidermal pustules and [[Skin Other - Pathology#Eosinophilic granuloma|eosinophilic granulomas]]