TABLE 3.

Types of β-lactamases produced and MICs of β-lactams for PABL-producing strains

Species (no. of strains) and strain no.	β-Lactamase type(s)	MIC (μg/ml)a
		PIP	CTX	CAZ	FEP	FOX	CMZ	IPM	MEM
E. coli (17)
A-1	CMY-2	>64	32	64	≤1	>32	>32	≤1	≤0.5
B-1	CMY-2	>64	8	16	≤1	>32	16	≤1	≤0.5
B-2	CMY-2	32	4	16	≤1	16	8	≤1	≤0.5
B-3	CMY-2	>64	32	64	≤1	>32	32	≤1	≤0.5
B-4	CMY-2	>64	16	64	≤1	>32	>32	≤1	≤0.5
B-5	CMY-2	>64	64	64	≤1	>32	>32	≤1	≤0.5
C-2	CMY-2, CTX-M-like	>64	>128	32	>32	>32	16	≤1	≤0.5
C-3	CMY-2	>64	64	>128	4	>32	>32	≤1	≤0.5
C-4	CMY-2	32	8	16	≤1	>32	32	≤1	≤0.5
C-5	CMY-2	>64	16	32	≤1	>32	32	≤1	≤0.5
C-6	CMY-2	>64	16	64	≤1	>32	>32	≤1	≤0.5
D-1	CMY-2	>64	32	32	≤1	>32	>32	≤1	≤0.5
E-1	CMY-2	>64	16	32	≤1	>32	>32	≤1	≤0.5
F-5	CMY-2	32	16	32	≤1	>32	>32	≤1	≤0.5
G-1	CMY-2	>64	8	16	≤1	32	16	≤1	≤0.5
G-2	CMY-2	32	8	16	≤1	32	16	≤1	≤0.5
H-1	CMY-2	32	8	16	≤1	>32	8	≤1	≤0.5
K. pneumoniae (8)
I-1	CMY-8	>64	32	1	≤1	>32	>32	≤1	≤0.5
J-1	CMY-8	>64	64	4	≤1	>32	>32	≤1	≤0.5
F-1	DHA-1	>64	16	64	≤1	>32	>32	≤1	≤0.5
F-2	DHA-1	>64	16	64	≤1	>32	>32	≤1	≤0.5
F-3	DHA-1	>64	8	16	≤1	>32	>32	1	≤0.5
K-1	DHA-1	>64	16	64	≤1	>32	>32	≤1	≤0.5
L-2	DHA-1	>64	8	32	≤1	>32	>32	≤1	≤0.5
H-2	DHA-1, CTX-M-like	>64	>128	64	>32	>32	>32	≤1	≤0.5
K. oxytoca (3)
M-1	MOX-1	>64	32	≤0.5	≤1	>32	>32	≤1	≤0.5
C-1	CMY-2	32	2	4	≤1	16	8	≤1	≤0.5
F-4	CMY-2	>64	32	128	≤1	>32	>32	≤1	≤0.5
P. mirabilis (1), L-1	CMY-2	≤8	4	2	≤1	16	4	≤1	≤0.5
E. coli ATCC 25922		≤8	≤0.5	≤0.5	≤1	≤8	≤0.5	≤1	≤0.5
P. aeruginosa ATCC 27853		≤8	8	2	≤1	>32	>32	≤1	≤0.5

^aAbbreviations: PIP, piperacillin; CTX, cefotaxime; CAZ, ceftazidime; FEP, cefepime; FOX, cefoxitin; CMZ, cefmetazole; IPM, imipenem; MEM, meropenem.