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Effects of Cattle Feeding Location and use of Tylosin on Expression of Antimicrobial Resistance (AMR) and Liver Abscesses


In the face of losing this vital tool in beef production, tremendous focus has been placed on identifying an 
alternative solution that does not sacrifice animal health or productivity. However, in order to competently identify an 
alternative, a more comprehensive understanding of the microbiological variables influencing liver abscess rates should 
be established. Therefore, the objective of this study was to utilize newly developed technologies to provide a more 
comprehensive perspective on the microbiological differences of cattle supplemented with Tylosin versus those fed diets 
without Tylosin supplementation. With this understanding, it was hypothesized that more targeted and effective Tylosin‐
alternatives can be developed and implemented in commercial beef production. 

Apley, M; Belk, Keith; Boucher, C; Carlson, C; Delmore, R; Geornaras, Ifigenia; Jones, K; Loneragan, M; Martin, J; Morley, Paul; Woerner, Dale; Yang, Hua
Colorado State University
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