Trace Mineral & Vitamin Supplementation Flashcards
Selenium function
Antioxidant - protect cell from peroxides and oxidative action
T4-T3 conversion
Describe the pathological lesions seen with WMD
myonecrosis, chronic calcification of diaphragm, tongue, heart, skeletal muscle
How can we prevent WMD?
Inject late gestation females (be aware of anaphylactic type reactions)
Inject neonates or purchased stocker calves
Must acknowledge that injections are only a temporary fix
How do you assess an animal for selenium deficiency?
Blood, serum, plasma, liver SE levels
Achromotrichia is….
Lack of color in hair
What are some of the classic presentations of Cu deficiency?
Achromotrichia
Swayback in lambs: spinal cord demyelination/degeneration
How is Cu associated with aortic rupture in turkeys?
Cu important for collagen binding
Collagen is a major component of vessels
Vessels lack integrity and can rupture
Cu:Mo ratio
> 6:1
NRC recommends _____ ppm Cu in diet
8-10
What species is most commonly get Cu toxicosis?
Sheep
What is the best sample for interpreting copper concentrations?
Liver
Who is Zinc’s bestie?
Vitamin A
How can classic zinc deficiency present?
Parakeratosis: thickening of the skin, impaired immune function, impaired reproductive efficiency
Are sulfates or oxides absorbed better?
Sulfates
Organic are superior though
T/F: Vitamin A can be stored in the liver for 4-6 months
True - pack it in during the grazing season so it’s available during the winter
