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Selenium deficiency occurs when an organism lacks the required levels of selenium, a critical nutrient in many species.Deficiency, although relatively rare in healthy well-nourished individuals, [1] can have significant negative results, [2] affecting the health of the heart and the nervous system; contributing to depression, anxiety, and dementia; and interfering with reproduction and gestation.
The subacute form causes weakness, fasciculations, cramping, and stiffness of muscles, which can lead to recumbency, as well as a stilted gait, dysphagia, ptyalism, and a weak suckle. [6] It may be treated with selenium supplementation, but there is a 30–45% mortality rate. [ 7 ]
Selenium is a component of the amino acids selenocysteine and selenomethionine. In humans, selenium is a trace element nutrient that functions as cofactor for glutathione peroxidases and certain forms of thioredoxin reductase. [1] Selenium-containing proteins are produced from inorganic selenium via the intermediacy of selenophosphate (PSeO 3 3 ...
Sheep and goats are both small ruminants with cosmopolitan distributions due to their being kept historically and in modern times as grazers both individually and in herds in return for their production of milk, wool, and meat. [1] As such, the diseases of these animals are of great economic importance to humans.
Grass tetany also called the staggers , is a metabolic disease involving magnesium deficiency, which can occur in such ruminant livestock as beef cattle, dairy cattle and sheep, [1] usually after grazing on pastures of rapidly growing grass, especially in early spring.
Mineral deficiency is a lack of the dietary minerals, the micronutrients that are needed for an organism's proper health. [1] The cause may be a poor diet , impaired uptake of the minerals that are consumed, or a dysfunction in the organism's use of the mineral after it is absorbed.
It causes small pustules in the skin of primarily sheep and goats, but can also occur on the hands of humans. [3] A pale halo forms around a red centre. [4] It may persist for several weeks before crusting and then either resolves or leaves a hard lump. [4] There is usually only one lesion, but there may be many, and they are not painful. [4]
iodine deficiency / iodism (hyperthyroidism [31]) Molybdenum: 0.045 2; 0.6 Required for the functioning of xanthine oxidase, aldehyde oxidase, and sulfite oxidase [32] Legumes, whole grains, nuts [29] molybdenum deficiency / molybdenum toxicity [33] Selenium: 0.055 0.4; 0.3 Essential to activity of antioxidant enzymes like glutathione peroxidase