Table 2.

Antibacterial interpretive categories (breakpoints) for tetracycline antibacterial agents in dogs from CLSI [17]

Drug	Susceptible	Intermediate	Resistant
Doxycycline	≤ 0.12 μg/mL	0.25 μg/mL	≥ 0.5 μg/mL
Tetracycline	≤0.25 μg/mL	0.5 μg/mL	≥1.0 μg/mL
Minocycline	≤0.5 μg/mL	1.0 μg/mL	≥2.0 μg/mL