Table 1.

Summary of strains used in this study.

Name	Source	Mechanism of resistance to COL	MIC of COL	BAI Microdilution assay (mg/L)			Conclusion effect	EDTA Microdilution assay (mg/L)			Conclusion effect	BAI and EDTA Microdilution assay (mg/L)		Conclusion effect
				MIC of BAI	MIC of 1⁄2 BAI + COL	MIC fold change		MIC of EDTA	MIC of 1⁄2 EDTA + COL	MIC fold change		MIC of 1⁄2 BAI + 1⁄2 EDTA	MIC fold change
JS	–	–	1/2	2500	1/2	1	–	125	1/32	16	–	1/256	128	–
SR01	chicken	Table S1	32	2500	4	8	None	125	2	16	Reverse	1/8	256	Reverse
SR02	chicken	Table S1	4	2500	1/4	16	Reverse	250	1/8	32	Reverse	1/256	1024	Reverse
SR03	chicken	Table S1	32	2500	8	4	None	250	1	32	Reverse	1/16	512	Reverse
SR04	chicken	Table S1	32	2500	2	16	Reverse	125	1/2	64	Reverse	1/32	1024	Reverse
SR05	chicken	Table S1	4	2500	1	4	Reverse	125	1/4	16	Reverse	1/32	128	Reverse
SR06	chicken	Unknown	16	2500	1/2	32	Reverse	125	4	4	None	1/32	512	Reverse
SR07	chicken	Unknown	16	2500	2	8	Reverse	125	2	8	Reverse	1/8	128	Reverse
SR08	chicken	Unknown	8	2500	1	8	Reverse	125	1	8	Reverse	1/32	256	Reverse
SR09	chicken	Table S1	32	2500	2	16	Reverse	125	2	16	Reverse	1/128	4096	Reverse
SR10	chicken	Table S1	32	2500	1	32	Reverse	125	1	32	Reverse	1/512	16384	Reverse
SR11	chicken	Unknown	32	2500	8	4	None	125	4	8	None	1/4	128	Reverse
SR12	chicken	Unknown	64	2500	4	16	None	125	4	16	None	1/8	512	Reverse
SR13	chicken	mcr-1	16	2500	2	8	Reverse	125	1	16	Reverse	1/16	256	Reverse
SR14	chicken	mcr-1	32	2500	4	8	None	125	2	16	Reverse	1/8	256	Reverse
SR15	human	mcr-1	64	2500	1	64	Reverse	125	4	16	None	1/4	256	Reverse
SR16	human	Unknown	32	2500	4	8	None	125	1/2	64	Reverse	1/64	2048	Reverse
SF01	human	–	1	2500	1/4	4	–	500	1/128	128	–	1/1024	1024	–
SF02	human	–	1/2	2500	1/4	2	–	250	1/2	1	–	1/8192	4096	–
SF03	chicken	–	1/8	2500	1/32	4	–	125	1/128	16	–	1/2048	256	–
SF04	chicken	–	1	2500	1/4	4	–	250	1/4	4	–	1/256	256	–

Note: The “−” means that the strain is sensitive to colistin; BAI, baicalin. COL, colistin.