Difference between revisions of "Skin Nutritional - Pathology"

Revision as of 17:59, 22 February 2011

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

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

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

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 ===[[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
-*'''In ruminants''':
-**Grossly: alopecia, crusts and scales on face, neck and distal extremities and mucocutaneous junctions
-**Microscopically: parakeratosis, sometimes hyperkeratosis
-[[Category:Integumentary System - Nutritional Pathology]]
 ===[[Copper Deficiency]]===