Table 3.

MICs of selected antibiotics for stable O. rhinotracheale SCVs and their wild-type isolates

Antibiotic	Antibiotic MICs (μg/ml) for the SCV or WT isolatea:
	SCV3	WT3	SCV13	WT13	SCV16	WT16	SCV21	WT21	SCV28	WT28
Amoxicillin	4	4	8	8	8	4	4	4	32	8
Gentamicin	128	128	>256	256	128	64	>256	8	256	256
Sulfamethoxazole	128	128	256	256	>256	128	256	4	256	16
Clarithromycin	32	8	128	16	8	4	64	64	8	8
Polymyxin B	64	64	256	8	64	64	64	8	256	8
Cefuroxime sodium	64	16	16	16	128	8	8	2	64	4
Norfloxacin	32	8	64	16	32	2	32	8	64	2

^aValues are median MICs from three tests.