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Selenium Deficiency in Beef Cattle

Selenium Deficiency in Beef Cattle. John Maas, DVM, MS, DACVN, DACVIM Extension Veterinarian School of Veterinary Medicine University of California, Davis. Selenium Deficiency Syndromes. White Muscle Disease Nutritional Myodegeneration Diarrhea Illthrift, reduced weight gains

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Selenium Deficiency in Beef Cattle

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  1. Selenium Deficiencyin Beef Cattle John Maas, DVM, MS, DACVN, DACVIM Extension Veterinarian School of Veterinary Medicine University of California, Davis

  2. Selenium Deficiency Syndromes • White Muscle Disease • Nutritional Myodegeneration • Diarrhea • Illthrift, reduced weight gains • Retained placenta • Abortions • Infertility—cows & bulls • Decreased immune function

  3. Selenium Diagnostics—CattleBlood Se Concentration ppb • Deficient <50 ng/ml • Marginal 50-80 ng/ml • Adequate 100-350 ng/ml • Toxic 5,000 ng/ml 

  4. Selenium Injections—Cattle • Bo-Se®, Mu-Se®, Multimin®—sodium selenite is active ingredient • IM or Sub-Q • Rapid response, short-term partial supplementation • Maas, Peauroi, Tonjes, et al, J Vet Internal Med 7:342-348, 1993

  5. Selenium Bottom Line • Most common trace mineral deficiency • WMD, Ill-thrift, Reproductive losses, decreased immune function • Easy to diagnose Se status • Supplements: none perfect—TMR for dairies, feedlots, feeds, salt mixes, molasses supplements, injections, CA rumen boluses, fertilizers in advanced nations • Toxicity—local, 50-100X safety margin

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