Feed Lot

APR 2013

Feedlots and cow/calf operations in the beef industry who feed 500 or more has annually on grains and concentrates; maintain 500 or more beef cows; backgrounder, stocker/grower, preconditioner; veterinarian, nutritionist, consultant

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r ��� An Effective vent Disease in humans, found he could transfer immunity to patients by using dialyzed leukocytes. When this extract was taken from a blood donor resistant to the pathogen and injected into a patient that had no immunity, the immunity of the donor was transferred to the na��ve patient. Part of the lymphocyte (white blood cell) contained what Lawrence dubbed ���transfer factor.��� Research was conducted during the 1950���s through 1970���s then nearly halted because the world���s blood supply was becoming contaminated by HIV and hepatitis C virus and the only known source of transfer factor was blood. Also, more exciting new discoveries revolved around antimicrobials. The phenomenon of transfer factor was not actively pursued again until the late 1980���s when researchers discovered that bovine colostrum contains significant amounts of this ingredient that stimulates both humoral and cellular immunity. Veterinary researchers observed a large number of lymphcytic cells in colostrum, and discovered that transfer factor is a lymphokine���one of the protein messengers released by antigen-sensitized lymphocytes (white blood cells). Chicken eggs also contain transfer factors and the combination from eggs and colostrum increases effectiveness by 185 percent. A veterinary product called Livestock Stress Formula was created by Dr. Joe Ramaekers, and is now used in cattle during stress periods to help prevent illness. ���If we give it to newborn calves, it���s the equivalent of 6 to 8 gallons of colostrum in terms of protective factors,��� says Slagle. ���At weaning they are ���� FEED���LOT April/May 2013 Circle No. 129 on Reply 29

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