TABLE 2.

MICs of β-lactams for S. enteritidis KF92, its transconjugant, its transformant, E. coli JM101, E. coli HB101, E. coli J53-2 producing BIL-1, E. coli C600 producing MIR-1, and the transformants with pNH5^a

Strain	Plasmid	Bla	MIC (mg/liter)
			AMX	AMC	TIC	MEC	CF	FOX	CTX	MOX	FEP	ATM	IMP
S. enteritidis	pSAL1	DHA-1	≥512	≥512	>256	4	≥1,024	512	≥64	32	2	4	1
E. coli HB101			8	8	4	0.5	8	8	0.12	0.25	0.12	0.06	0.25
E. coli HB101	pSAL1	DHA-1	≥512	≥512	128	0.5	1,024	128	16	1	0.12	1	1
E. coli HB101	pSAL1 + pNH5	DHA-1	≥512	512	64	0.5	1,024	32	8	0.5	0.12	0.12	1
E. coli JM101			8	4	4	0.5	16	4	0.25	0.12	0.12	0.12	0.5
E. coli JM101	pSAL2-ind	DHA-1	≥512	256	≥256	1	≥1,024	256	64	4	0.5	2	1
E. coli J53-2	J62.6	BIL-1	≥512	≥512	128	4	1,024	128	32	2	0.5	ND	1
E. coli J53-2	J62.6 + pNH5	BIL-1	≥512	≥512	128	4	1,024	128	32	2	0.5	ND	1
E. coli C600	pMG231	MIR-1	≥512	≥512	128	4	≥1,024	512	32	8	0.25	ND	1
E. coli C600	pMG231 + pNH5	MIR-1	≥512	≥512	128	4	≥1,024	512	32	8	0.25	ND	1

^aAbbreviations: Bla, β-lactamase; AMX, amoxicillin; AMC, amoxicillin plus clavulanic acid (2 mg/ml); TIC, ticarcillin; MEC, mecillinam; CF, cephalothin; FOX, cefoxitin; CTX, cefotaxime; MOX, moxalactam; FEP, cefepime; ATM, aztreonam; IMP, imipenem; ND, not done.