Difference between revisions of "Skin Nutritional - Pathology"

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===General===
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#REDIRECT[[:Category:Integumentary System - Nutritional Pathology]]
*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
 
*'''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===
 
*In dogs
 
*Grossly: generalised scaling
 
*Microscopically: marked follicular hyperkeratosis
 
 
 
===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
 

Latest revision as of 18:01, 22 February 2011