Abstract

With the onset of the Veterinary Feed Directive, there is a need to evaluate the current strategies used for the control of liver abscesses as well as coccidia species (Eimeria bovis & Eimeria zuernii) in the feedlot cattle. Additionally, removing coccidiostats and other antimicrobials from the feed will decrease costs of beef production. A study conducted in the summer of 2018 (unpublished) showed no difference in the prevalence of liver abscesses at slaughter nor Eimeria spp in feedlot cattle. The primary objectives of this study are to evaluate the effects of different feeding strategies on the prevalence of liver abscesses and coccidia in feedlot cattle. Secondary objectives of this study are to evaluate the effects of antimicrobials on average daily gain and feed conversion in feedlot cattle.

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