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Cumulative incidence of BRD symptoms in beef steers receiving (BAS; n = 171) or not (CON; n = 171) a BAS at feedlot entry (d 0). Steers were observed daily for BRD signs according to the DART system (Zoetis, Florham Park, NJ) and received antimicrobial treatment as in Lopez et al. (2018). A treatment × day interaction was detected (P < 0.01). Within days: *P ≤ 0.05; **P < 0.01.
