Table 3. High-risk feeder heifer treatment failure rate by bacterial species and clsi tulathrymycin susceptibility classification.

Treatment Failure Rate (TFR)
		Non-Resistant	Resistant	Non-Susceptible	Susceptible
Day-0	M. haemolytica	49.1%	50%	33.3%	50.5%
Day-0	P. multocida	42.9%	NA	NA	42.9%
1st BRD- Treatment	M. haemolytica	66.7%	50%	49.6%	100%
1st BRD- Treatment	P. multocida	50%	56.3%	60%	41.7%

CLSI MICs: M. haemolytica and P. multocida: susceptible, non-susceptible (>16 ug/ml), resistant (≥ 64 ug/ml), non-resistant (<64 ug/ml)