TABLE 1.

Distribution of MICs of 17 antimicrobial agents for tetracycline-resistant isolates

Antimicrobial agent	No. of isolates for which the MIC (μg/ml) was:																						MIC (μg/ml)		Percenta
	≤0.003	≤0.0075	0.0075	≤0.015	0.015	≤0.03	0.03	0.06	0.12	≤0.25	0.25	0.5	1	2	4	>4	8	16	>16	32	64	128	50%	90%	S	I	R
Tetracycline																	14	48		109	69	2	32	64			100.0
Doxycycline												1	7	40	133		55	6					4	8	19.9	54.9	25.2
Minocycline												3	23	33	89		71	23					4	8	24.4	36.8	38.8
Tigecycline	2		37		123		73	7															0.015	0.03	100.0
Penicillin G		67			86		21	5	11		5	5	6	18	14		4						0.015	2	74.0	11.1	14.9
Cefotaxime		69			94		23	5	6		3		27	10	3		2						0.015	1	93.8	4.1	2.1
Meropenem				173			1	17	5		14	30	2										≤0.015	0.5	86.8	12.8	0.4
Vancomycin					3		5	12	54		140	28											0.25	0.5	100.0
Teicoplanin		3			26		145	67	1														0.03	0.06	100.0
Erythromycin										175		3	1	3	3			1	56				≤0.25	>16	72.4	1.2	26.4
Clindamycin						154		24	5		2				1	56							≤0.03	>4	76.9		23.1
Telithromycin				220			3	1	5		3	3	3	3	1								≤0.015	≤0.015	98.8	0.8	0.4
Chloramphenicol									2		1	7	23	59	55		21	69		5			4	16	70.7		39.2
Linezolid											5	79	147	11									1	1	100.0
Rifampin						221		15	2		1			1	1	1							≤0.03	≤0.03	98.8	0.4	0.8
Levofloxacin				2							2	73	161	2	1		1						1	1	98.8	0.4	0.4
Trimethoprim-sulfamethoxazole							1	3	2		39	27	39	37	32		41	16	5				2	8	30.2	31.4	38.4

^aS, susceptible; I, intermediate; R, resistant.