Selenium (Chemicals Summary)

CHEMICALS SUMMARY PAGE

Selenium:

Summary Information
Classification	Chemicals / Metals, Minerals & Simple Molecules / Type: (This chemicals section is currently predominantly used in Wildpro to *link* different data types and demonstrate inter-relationships. It does not contain detailed information on the chemical itself.)
Alternative Names	Se (Chemical symbol)
Notes	Selenium is an essential trace element, which is also toxic in large amounts. It has a close interaction with Vitamin E and other antioxidant nutrients; some mutual "sparing effects may be seen, but minimum levels of all required for proper metabolic function. Selenium is a constituent of two important enzymes (glutathione peroxidase and phospholipid hydroperoxide glutathione peroxidase) which protect tissue against oxidative damage from unsaturated fats in cell membranes; also a component of iodothironine 5'-deiodinase, involved in converting thyroxine to its active form. (B32.2.w23, B120)
Taxa Groups (hyperlinked if included as Wildpro Modules) containing host species which have been recorded as infected by this organism.	*Waterfowl*
Associated Waterfowl Diseases	Vitamin E / Selenium deficiency (White muscle disease)	Waterfowl Disease Summary	White muscle disease: muscular dystrophy, progressive paralysis, death.
	Vitamin E / Selenium deficiency (White muscle disease)	Waterfowl in which the associated disease has been recorded.	Aix sponsa - Wood duck Anas platyrhynchos - Mallard Anas wyvilliana - Hawaiian duck Anas acuta - Northern pintail Anas clypeata - Northern shoveler Anas cyanoptera - Cinnamon teal Anas rubripes - American black duck Aythya americana - Redhead Callonetta leucophrys - Ringed teal Mergus merganser - Common merganser Tadorna radjah - Radjah shelduck
	Selenium Toxicity (Selenosis, Selenium Poisoning)	Waterfowl Disease Summary	Particularly affects embryos, causing deformities. Also emaciation in adults, decreased growth and survival in juveniles.
	Selenium Toxicity (Selenosis, Selenium Poisoning)	Waterfowl in which the associated disease has been recorded.	Anas platyrhynchos domesticus - Domestic duck
	Capture Myopathy (Exertional Myopathy, Stress Myopathy, Exertional Rhabdomyolysis, Overstraining Disease, Polymyopathy, White Muscle Disease, Transport Myopathy, Spastic Paresis, Muscle Necrosis, Leg Paralysis, Muscular Dystrophy, Degenerative Myopathy, Ideopathic Muscle Necrosis, White Muscle Stress Syndrome)	Waterfowl Disease Summary	Usually acute, signs vary from muscle stiffness to paralysis, sometimes with cardiac and/or respiratory signs, and death; may develop following capture or other physical stress.
		Waterfowl in which the associated disease has been recorded.	Anser caerulescens - Snow goose Anser rossii - Ross's goose Branta canadensis - Canada goose Dendrocygna autumnalis - Black-bellied whistling-duck
	Egg Binding (Egg Retention, Eggbound, Dystocia)	Waterfowl Disease Summary	Failure of an egg to pass through the oviduct and be laid.
	Egg Binding (Egg Retention, Eggbound, Dystocia)	Waterfowl in which the associated disease has been recorded.	Species not specified.
	Congenital Abnormalities (Congenital malformation)	Waterfowl Disease Summary	Abnormal development of downies during incubation - present at hatching.
	Congenital Abnormalities (Congenital malformation)	Waterfowl in which the associated disease has been recorded.	Aix galericulata - Mandarin duck Aix sponsa - Wood duck Anas clypeata - Northern shoveler Anas platyrhynchos - Mallard Anas platyrhynchos domesticus - Domestic duck Anas platyrhynchos domesticus x Cairina moschata domesticus - Mule duck Anser caerulescens - Snow goose Netta erythrophthalma - Southern pochard Cairina moschata - Muscovy duck Cygnus buccinator - Trumpeter swan

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