Table 2.

Morbidity parameters from beef steers receiving (BAS; n = 171) or not (CON; n = 171) a BAS at feedlot entry (d 0)a

Item	CON	BAS	SEM	P-value
Incidence of BRD signs, %	75.4	81.3	0.03	0.24
Number of antimicrobial treatments required	1.54	1.41	0.05	0.04
Steers removed from experiment, %	15.2	14.6	0.03	0.88
Mortality, %	12.2	8.8	0.03	0.41

^aSteers 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). Steers were removed from the study if a third medical treatment was warranted.