TABLE 3.

MICs for transconjugants and characterization of plasmids carrying oqxAB^a

Strain	Donor		Plasmid			MIC (μg/ml)b
	Origin	MLST	Size (kb)	RFLP pattern	Replicon	OLA	MEQ	NAL	NOR	CIP	ENR	CHL	FFC	SXT	TET	AMP	GEN	STR
E. coli C600						8	4	2	0.03	0.008	0.016	4	2	0.5	1	4	0.5	>512
W281-T	F1 sow	ST921	ND	ND	ND	128	64	16	0.125	0.06	0.06	128	16	16	2	>128	0.5	>512
W191-T	F1 sullage	ST172	115	I	FII	256	128	16	0.125	0.06	0.125	128	16	16	64	>128	1	>512
W322-T	F1 worker	ND	43	II	UT	512	256	64	0.25	0.06	0.125	64	16	4	1	>128	0.125	>512
W245-T	F1 boar	ST920	58	III	UT	512	128	16	0.125	0.06	0.06	64	16	8	1	>128	0.25	>512
G262-T	F2 soil	ST922	100	IV	FII	256	128	16	0.25	0.06	0.125	128	16	16	32	8	0.5	>512
G062-T	F2 piglet	ND	57	V	FII	256	128	32	0.125	0.06	0.125	32	16	8	4	>128	0.5	>512
G375-T	F2 worker	ND	53	VI	UT	256	256	64	0.25	0.06	0.125	32	16	8	4	16	0.25	>512
X1B1-T	F3 weaner	ST134	ND	ND	ND	256	64	16	0.125	0.06	0.125	128	16	16	32	16	0.5	>512
XT11-T	F3 soil	ST928	115	VII	FIVC	256	128	16	0.25	0.06	0.06	128	16	16	64	>128	0.5	>512
SW8-T	F4 pond water	ST926	115	VII	FII	512	256	64	0.5	0.06	0.125	128	16	16	1	>128	32	>512
ST2-Tc	F4 soil	ST925	81	VIII	UT	512	128	256	4	2	2	32	4	16	2	4	0.25	>512
SP8-T	F4 pig	ND	91	IX	UT	256	256	32	0.125	0.06	0.06	64	16	8	2	>128	0.25	>512
D83-T	F5 chicken	ND	ND	ND	ND	256	128	8	0.125	0.03	0.06	32	8	8	4	16	0.25	>512
E. coli DH5α/ pMD18-T::oqxAB						128	64	32	0.25	0.125	0.125	64	16	8	4	>128	0.125	2
E. coli DH5α						8	4	2	0.03	0.008	0.016	4	4	0.5	2	>128	0.5	4

^aND, not determined; UT, untypeable; F1 to F5, farm 1 to farm 5, respectively.

^bOLA, olaquindox; MEQ, mequindox; NAL, nalidixic acid; NOR, norfloxacin; CIP, ciprofloxacin; ENR, enrofloxacin; CHL, chloramphenicol; FFC, florfenicol; SXT, trimethoprim-sulfamethoxazole; TET, tetracycline; AMP, ampicillin; GEN, gentamicin; STR, streptomycin.

^cST2-T contained oqxAB, qnrB6, and aac(6′)-Ib-cr.