. 2003 May;41(5):1912–1918. doi: 10.1128/JCM.41.5.1912-1918.2003

TABLE 5.

ESBL-producing isolates and interpretive susceptibility results of cephalosporins and aztreonam reported by participating laboratories^a

Strain	Characteristic(s)^b	Cefotaxime				Ceftriaxone				Ceftazidime				Cefepime				Aztreonam
		Ref MIC	No. of laboratories reporting a result of:			Ref MIC	No. of laboratories reporting a result of:			Ref MIC	No. of laboratories reporting a result of:			Ref MIC	No. of laboratories reporting a result of:			Ref MIC	No. of laboratories reporting a result of:
		Ref MIC	S	I	R	Ref MIC	S	I	R	Ref MIC	S	I	R	Ref MIC	S	I	R	Ref MIC	S	I	R
E. coli RYC5H/99	TEM-27 + TEM-1	0.5	16	3	31	0.5	8	4	16	>512	0	0	50	1	14	4	32	256	1	4	42
E. coli RYC97056888	CTX-M-9 + TEM-1	8	3	2	45	16	0	4	22	0.5	23	1	26	4	13	6	31	1	20	2	26
K. pneumoniae LB3	SHV-5 + OprK35⁻	8	5	4	41	4	2	6	19	128	0	2	48	1	11	5	34	128	1	0	46
K. pneumoniae LB4	SHV-5 + OmpK35⁻/36⁻	128	1	2	47	64	0	2	25	>512	1	0	49	32	4	3	43	512	1	0	45
E. cloacae RYC97095983 I	AmpC + CTX-M-10	64	1	7	41	64	0	2	26	2	24	7	18	16	17	9	23	8	11	13	22
E. cloacae RYC97095983 SDM	AmpC ↑ + CTX-M-10	256	1	0	48	256	0	0	27	64	1	0	48	32	6	5	38	64	1	0	45

Ref, reference; S, susceptible; I, intermediate; R, resistant. MICs are given in micrograms per milliliter.

↑, hyperproduction.