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Equine derm
Question | Answer |
---|---|
Corynebacterium pseudotuberculosis | multiple large (about 5 cm) abscesses in the ventral pectoral region and nowhere else; systemically healthy |
Onchocerca | non-seasonal, ventral midline dermatitis and is mildly pruritic or not pruritic at all |
Dermatophilus congolensis | skin lesions on the dorsum. You find that he has sticky matted hair on the dorsum/pasterns with multiple crusts that have purulent exudate under them (crusting dermatitis) |
Dermatophilus congolensis | G(+), facultative anaerobic actinomycete, branching bacteria; Penicillin |
Staphylococcal cellulitis | uncommon and usually causes severe acute swelling dissecting along fascial planes and devitalizing the overlying skin. |
Trichophyton equinum (ringworm) | usually causes multifocal lesions with alopecia and some crusting, usually around the head, neck, and shoulders. |
Culicoides hypersensitivity | seasonal; can cause pruritus and excoriations and can be distributed dorsally or ventrally. (vector for Ochocerca cervicalis) |
Pemphigus foliaceus (autoimmune) | vesicles, erosions and ulcerations, especially around mucocutaneous junctions |
Dentigerous cyst | result of having tooth germ tissue in the ear; CS |
Habronema | granulomatous skin lesions that often contain small calcified dead larvae; migration of larval stomach worm |
Chorioptes equi | mange mite; usually found around the foot and fetlock; pruritic dermatitis, papules, crusts, thickened skin, as well as alopecia |
Fistulous withers (etiology) | Brucella abortus |
Haematobia irritans | ventral midline dermatitis with wheals with a central crust that progress to alopecia and ulceration with fairly focal lesions; affects cattle more than horses |
Dentigerous cyst | CS - swelling at the base of the ear, seromucoid discharge |
Dentigerous cyst | Tx - surgical removal of the tissue. |