TABLE 3.

MIC of four antibiotics to E2, SE211, and SE211-qnrS.

The source of strains	The name of the strains	MIC (mg/L)
		ENR	AMP	TET	CHL
Donor	E2	128	>256	128	128
Recipient	SE211	0.25	0.5	1	2
NTC	3-9-2	64	>256	128	128
Group 3.03	1–14	64	>256	64	128
	2-29-1	64	> 256	128	128
	2-29-2	128	> 256	128	128
	2-29-3	64	> 256	128	128
Group 10	S.2-23-1	128	> 256	128	128
	S.2-23-2	64	> 256	128	256
	S.2-23-3	128	> 256	128	256
	S.21–24	64	> 256	128	128

ENR, enrofloxacin; AMP, ampicillin; TET, tetracycline; CHL, chloramphenicol; NTC, non-treated control group; Group 3.03, prophylactic dose (3.03 mg/kg b. w.) of ENR; Group 10, clinical recommended dose of ENR (10 mg/kg b. w.).