Table 1.

MIC values for meropenem (MEM), cefotaxime (CTX), ceftazidime (CAZ), and resistant genes tested with PCR. MICs indicative of resistance for Enterobacterales, Pseudomonas spp., and Acinetobacter spp. are shown in bold. MICs higher than the meropenem screening breakpoint (ECOFF) are shown in Italics.

Species	MIC Values (Lg/mL)			bla Genes	ampC Genes
	MEM	CAZ	CTX
Enterobacterales
C. freundii	0.016	2	8	TEM-1	CIT
E. agglomerans	0.032	128	512	CTX-M-1, TEM-1
E. coli	4	≤0.5	≤0.5	TEM-1
E. coli	0.016	0.5	0.5	TEM-1
E. coli	0.016	8	4	CTX-M-1, TEM-1
E. coli	0.016	32	512	TEM-1, SHV
E. americana	4	32	16	CTX-M-1, TEM-1
Pseudomonas (no breakpoints for CTX)
P. oryzihabitans	256	256	32	TEM-1
Acinetobacter (no breakpoints for CAZ and CTX)
A. lwoffii	0.016	0.5	8	TEM-1
Species with no breakpoints
A. hydrophila	4	32	64	CTX-M-1, TEM-1
A. hydrophila	4	2	0.5	TEM-1
B. cepacia	4	8	16	TEM-1
B. cepacia	8	16	64	CTX-M-1, TEM-1, SHV
B. cepacia	8	16	64	CTX-M-1, TEM-1
C. indologenes	16	512	256	TEM-1
F. odoratum	16	16	64	TEM-1
S. maltophilia	128	64	256	TEM-1
S. maltophilia	64	32	256	TEM-1	EBC
S. maltophilia	64	8	64	TEM-1	EBC
S. maltophilia	64	64	256	TEM-1	ACC
S. maltophilia	64	64	64	TEM-1	CIT
S. maltophilia	64	128	128	CTX-M-1, TEM-1	CIT
S. maltophilia	64	128	256	TEM-1	CIT
S. maltophilia	32	16	256	TEM-1	CIT
S. maltophilia	32	64	256	CTX-M-1, TEM-1	CIT
S. maltophilia	32	128	256	CTX-M-1, TEM-1	CIT
S. maltophilia	32	64	256	CTX-M-1, TEM-1	CIT
S. maltophilia	128	64	256	TEM-1	CIT
S. maltophilia	128	4	64	TEM-1	CIT
S. maltophilia	16	16	64	TEM-1	CIT
S. maltophilia	16	128	512	TEM-1	CIT
S. maltophilia	8	64	128	TEM-1
S. maltophilia	4	2	16	TEM-1	CIT
S. maltophilia	1	2	128	TEM-1