Difference between revisions of "Skin Nutritional - Pathology"
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| Line 31: | Line 31: | ||
===Copper deficiency=== | ===Copper deficiency=== | ||
| − | * | + | *Hair or wool depigmentation |
| + | **Black sheep develop bands of lighter colouring | ||
| + | **Cattle develop spectacle pattern of depigmentation around eyes) | ||
| + | **Coat colour may change from black to reddish brown | ||
| − | ===Vitamin A | + | ===Vitamin A deficiency=== |
===Vitamin E deficiency=== | ===Vitamin E deficiency=== | ||
| + | *Steatitis may develop in cats fed excess fatty acids or with vitamin E deficincy | ||
| + | *Grossly: firm, yellow or orange nodules in subcutaneous tissue | ||
| + | *Microscopically: nodular to diffuse granulomatous panniculitis, macrophages and giant cells, oedema, fat necrosis, neutrophils and ceroid pigment | ||
Revision as of 12:33, 29 October 2008
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This article is still under construction. |
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General
- Often combined deficiency which improves when animal is fed a balnced diet
- Sometimes caused by change in demand (pregnancy, growth, cold weather) or due to disease
Zinc deficiency
- Mainly in dogs and pigs, sometimes ruminants
- In pigs:
- Grossly:circumscribed reddened papules and plaques, thick crusting and scaling, fissures along ventral abdomen and medial thighs, sometimes generalised
- Microscopically: parakeratosis, acantosis, pseudoepitheliomatous hyperplasia, hypergranulosis
- Commonly secondary bacterial dermatitis
- In dogs:
- Siberian huskies and Alaskan malamutes:
- Grossly: scales and crusts around mouthm chin, eyes, joints, prepuse, scrotum, vulva
- Microscopically: diffuse hyperkeratosis extending to follicles, superficial perivascular dermatitis with eosinophils
- Rapidly growing puppies:
- Grossly: scaly plaques on skin, nasal planum and foot pads
- Siberian huskies and Alaskan malamutes:
- In ruminants:
- Grossly: alopecia, crusts and scales on face, neck and distal extremities and mucocutaneous junctions
- Microscopically: parakeratosis, sometimes hyperkeratosis
Copper deficiency
- Hair or wool depigmentation
- Black sheep develop bands of lighter colouring
- Cattle develop spectacle pattern of depigmentation around eyes)
- Coat colour may change from black to reddish brown
Vitamin A deficiency
Vitamin E deficiency
- Steatitis may develop in cats fed excess fatty acids or with vitamin E deficincy
- Grossly: firm, yellow or orange nodules in subcutaneous tissue
- Microscopically: nodular to diffuse granulomatous panniculitis, macrophages and giant cells, oedema, fat necrosis, neutrophils and ceroid pigment