TABLE 1.

MICs of antimicrobials for Tet(X7)- and Mcr-1.1-producing Escherichia coli strains and transconjugants isolated in this study

Antibiotic	MIC (mg/liter)a for strain:
	A-1-4-1b	A-1-4-1-TC	A-1-8-1b	A-1-8-1-TC	A-1-10-1b	A-1-10-1-TC	A-1-11-3b	A-1-11-3-TC	A-1-22-2b	A-1-22-2-TC	E. coli J53
Ampicillin	>1,024	>256	>1,024	>256	>1,024	>256	>1,024	>256	>1,024	>256	16
Cefotaxime	64	32	0.0625	0.125	256	256	64	128	256	256	0.0625
Doripenem	0.125	<0.125	<0.125	<0.125	<0.125	<0.125	<0.125	<0.125	<0.125	<0.125	≤0.0078
Meropenem	0.5	<0.125	0.5	<0.125	0.5	<0.125	0.25	<0.125	0.5	<0.125	0.0312
Kanamycin	512	<4	1,024	<4	1,024	512	1,024	512	1,024	512	1
Gentamicin	32	16	64	8	64	64	32	64	64	64	<1
Ciprofloxacin	16	<0.03125	16	<0.03125	32	4	32	8	32	0.5	0.0625
Chloramphenicol	128	4	128	4	512	256	256	256	512	256	4
Tetracycline	64	16	64	16	128	64	128	128	128	64	<2
Tigecycline	16	4	16	4	16	8	16	16	8	8	0.125
Colistin	4	4	4	4	8	2	2	2	4	2	0.125
Fosfomycin	2,048	1,024	2,048	1,024	16	4	8	2	4	2	4

^aResistance to the antibiotics is given in boldface. Interpretation was done according to the CLSI guidelines (10) and EUCAST standards. TC, transconjugant.

^bDonor.