Influence of tilmicosin on quantified pulmonary ...
risk of developing bovine respiratory disease (BRD). The objectives were to characterize and quantify con centrations of respiratory pathogens in the main-stem bronchi before and after administration of tilmicosin as a treatment for BRD. Ninety-three beef steers and heifers were selected from a group of 421 high-risk calves based on a BRD
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