Table 5.

Test results of 55 strains of Bordetella pertussis (n = 55).

	E-test (mg/L)			KB disk diffusion method (mm)
Antibiotics	MIC50	MIC90	MIC value	The diameter of the inhibitory ring	Sensitive rate
erythromycin	0.094	>256	0.016–>256	6–60#	50.9%
clindamycin	0.75	>256	0.019–>256
ampicillin	0.125	0.19	0.064–0.25
levofloxacin	0.38	0.5	0.19–0.75
sulfamethoxazole-trimethoprim	0.125	0.25	0.023–0.38

MIC = minimum antibiotic concentration.