Equine-Integumentary

Question 1

Dermatospraxis

Answer 1

Cutaneous asthenia

• faulty assembly of collagen
• loose, fragile skin

Question 2

Epidermolysis bullosa

Answer 2

Defect in basement membrane protein

-dermal epidermal separation

Question 3

Equine coronary band dystrophy

Answer 3

symmetric, non painful (not lame), progressive hoof deformation

Question 4

Vitiligo

Answer 4

leukoderma

-immune mediated attack on melanocytes

Question 5

leukotrichia

Answer 5

hairs white

Question 6

Actinic Dermatitis

Answer 6

chronic sun exposure

• erythema, swelling, edema, bullae -> alopecia, scaling, crusting
• progressive ulceration as sequelae

Question 7

Photosensitization types

Answer 7

1. Primary-drugs/plants
2. Hepatogenous-secondary to liver dz
3. Porphyria-can’t metabolize RBC breakdown products
4. Idiopathic

Question 8

Photosensitization pathophys

Answer 8

photodynamic agent in skin reactive with UV light to release free radicals, leads to tissue damage

Question 9

Acute photosens

Answer 9

edema, erythema, vesicles to ulceration, exucation from tis necrosis

Question 10

Photoactivated vasculitis

Answer 10

white haired extremities
-erythema, edema, exudation, erosions, ulcers
microscopically
-vasculitis and ischemic injury