Table 2.

Antimicrobial susceptibility patterns of strain QST31.

Drug Classification	No.	Antimicrobial Drugs	Breakpoints (mm)			Inhibition Zone (mm)	Sensitivity
			R	I	S
Aminoglycosides	1	Gentamicin	≤12	13~14	≥15	11	R
	2	Streptomycin	≤11	12~14	≥15	6	R
	3	Tobramycin	≤12	13~14	≥15	6	R
	4	Kanamycin	≤13	14~17	≥18	6	R
	5	Neomycin	≤12	13~16	≥17	11	R
	6	Spectinomycin	≤9	10~15	≥16	6	R
	7	Amikacin	≤14	15~16	≥17	18	S
Macrolides	8	Clarithromycin	≤13	14~17	≥18	11	R
	9	Erythromycin	≤13	14~22	≥23	12	R
Tetracyclines	10	Doxycycline	≤12	13~15	≥16	9	R
	11	Tetracycline	≤14	15~18	≥19	6	R
Sulfonamides	12	Sulfamethoxazole/ trimethoprim	≤9	10~15	≥16	6	R
	13	Sulfamethoxazole	≤9	10~15	≥16	6	R
Quinolones	14	Ofloxacin	≤12	13~15	≥16	16	S
	15	Ciprofloxacin	≤15	16~20	≥21	15	R
	16	Enrofloxacin	≤15	16~20	≥21	16	I
	17	Norfloxacin	≤12	13~16	≥17	9	R
Amphenicols	18	Florfenicol	≤12	13~17	≥18	14	I
	19	Chloramphenicol	≤12	13~17	≥18	9	R
β-lactam	20	Cefalotin	≤14	15~17	≥18	7	R
	21	Cefazolin	≤14	15~17	≥18	6	R
	22	Cefotaxime	≤14	15~22	≥23	14	R
	23	Cefoperazone	≤15	16~20	≥21	16	I
	24	Cefixime	≤9	10~15	≥16	8	R
	25	Ampicillin	≤9	10~15	≥16	6	R
	26	Amoxicillin	≤13	14~17	≥18	6	R
	27	Piperacillin	≤17	18~20	≥21	6	R
Lincosamides	28	Clindamycin	≤14	15~20	≥21	7	R
	29	Lincomycin	≤9	10~15	≥16	6	R
Glycopeptides	30	Vancomycin	≤9	10~15	≥16	6	R
Polypeptides	31	Bacitracin	≤8	9~12	≥13	6	R
Others	32	Polymyxin B	≤8	8~11	≥12	11	I
	33	Furantoin	≤14	15~16	≥17	17	S
	34	Rifampicin	≤16	17~19	≥20	10	R
	35	Metronidazole	≤9	10~15	≥16	6	R

Notes: R, Resistant; I, Intermediate; S, Susceptible.