Feed Lot

SEP-OCT 2018

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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16 FEED•LOT September/October 2018 use of antimicrobials. It might also help guide us when we ask the question, "What can I do differently from a management and husbandry perspective to reduce the magni- tude of pathogen exposure?" We will explore that question more in the next issue. T. Robin Falkner is a technical services veterinarian with Zoetis and brings 30 years of professional experience as a private practitioner and Extension veterinarian, as well as serving in a support role to practicing veterinari- ans and beef producers in his industry positions. Dr. Falkner is recognized throughout the beef industry for his expertise in feeder cattle health and the management of feeder-cattle-based businesses, and his passion for help- ing producers find better management solutions to the issues they face. FL diseases they are not exposed to. BRD in feeder cattle is a complex disease also involving stress and management factors, and better BCP can reduce or delay pathogen exposure long enough for co-fac- tors that increase disease severity to be mitigated. We often see in disease challenge models a relatively mild disease course when healthy animals are exposed to BRD pathogens singly, as compared with severe illness when we combine two or more "mild" pathogens. These models are consistent with field observations on pathogen loading: the immune system appears to often do quite well with a single BRD pathogen, but struggles with two or more concurrently. Our identifying and prioritizing management practic- es that reduce multiple pathogen loading early in the receiving pe- riod appears to hold tremendous promise in reducing the incidence and severity of BRD. Those same practices could also impede the movement of any particularly vir- ulent or resistant pathogen through an operation. In a world where antimicrobials did not exist, reducing pathogen exposure would be our No. 1 pri- ority. It should still be our priority when afforded the privilege of using them. Maybe this perspective, and a continued investment in BRD re- search to better understand the role of PL, could help us come up with better approaches that improve treatment success and judicious FEEDLOT FOCUS W hich of our management practices increases PL, and can we eliminate some of them? A simple example, present on many operations, is placing dosing equipment into the mouths of animals at arrival processing without disinfecting between them. There should be little disagreement that this practice adds to the PL of individual calves. Treatment Success... from previous page

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