TABLE 1.

MICs, antimicrobial resistance genes, and plasmid profiles of E. coli strains and their corresponding transconjugants^d

Strain	MIC (μg/ml) ofa:						AMRb gene(s)	Plasmid(s) (kb)	mcr-1 plasmids (kb)	blaCTX-M plasmid (kb)	CIc form
	CLS	AMK	CTX	CIP	CRO	FOS
14	8	4	8	0.12	>16	>512	blaCTX-M-14, fosA3	∼104, ∼230	∼230, IncHI2	∼230	+
TC14	4	0.5	8	0.06	>16	<4	blaCTX-M-14	∼230	∼230, IncHI2	∼230	+
25	8	2	>16	>16	>16	>512	blaCTX-M-55, fosA3	∼33, ∼60, ∼104	∼33, IncX4	∼60	−
TC25	4	1	4	0.015	>16	<4	blaCTX-M-55	∼33, ∼60	∼33, IncX4	∼60	−
149	8	>128	>16	>16	>16	>512	blaCTX-M-55, fosA3	∼33, ∼60, ∼90	∼33, IncX4	∼60	−
TC149	8	0.5	>16	0.015	>16	<4	blaCTX-M-55	∼33, ∼60	∼33, IncX4	∼60	−
163	8	4	>16	>16	>16	>512	blaCTX-M-55, blaCTX-M-65, fosA3	∼60, ∼78, ∼104, ∼138	∼60, IncI2	∼60	−
TC163	8	0.5	>16	0.015	>16	<4	blaCTX-M-55	∼60	∼60, IncI2	∼60	−
199	8	1	>16	0.5	>16	<4	blaCTX-M-14	∼90, ∼120, ∼280	∼280, IncHI2	∼280	+
TC199	8	0.5	>16	0.015	>16	<4	blaCTX-M-14	∼280	∼280, IncHI2	∼280	+
328	4	2	>16	2	>16	>512	blaCTX-M-55, fosA3	∼33, ∼90	∼33, IncX4	∼90	−
TC328	4	0.5	>16	0.0075	>16	<4	blaCTX-M-55	∼33, ∼90	∼33, IncX4	∼90	−
383	8	4	>16	>16	>16	>512	blaCTX-M-55, fosA3	∼33, ∼60, ∼78, ∼138, ∼200	∼33, IncX4	∼60	−
TC383	4	0.5	>16	0.0075	>16	<4	blaCTX-M-55	∼33, ∼60	∼33, IncX4	∼60	−
384	4	>128	>16	>16	>16	>512	blaCTX-M-55, fosA3	∼60, ∼120	∼60, IncI2	∼60	−
TC384	2	0.5	>16	0.0075	>16	<4	blaCTX-M-55	∼60	∼60, IncI2	∼60	−
391	4	2	>16	0.5	>16	<4	blaCTX-M-14	∼33, ∼104, ∼250	∼250, IncHI2	∼250	+
TC391	4	0.5	4	0.015	>16	<4	blaCTX-M-14	∼250	∼250, IncHI2	∼250	+
J53	1	0.03	0.015	0.5	1	<4	−	−	−	−	−

^aCLS, colistin; AMK, amikacin; CTX, cefotaxime; CIP, ciprofloxacin; CRO, ceftriaxone; FOS, fosfomycin.

^bAMR, antimicrobial resistance.

^cCI, circular intermediate.

^d−, negative; +, positive.