Table 1.

mcr genes and other resistant genes used in this study

NO.	Genetic types	Source	Gene Role
1	mcr-1	E. coli	Positive control
2	mcr-2	Plasmid	Positive control
3	mcr-3	E. coli	Positive control
4	mcr-4	E. coli	Positive control
5	mcr-5	Plasmid	Positive control
6	blaKPC-2	K. pneumonia	Negative control
7	blaNDM-1	E. coli	Negative control
8	blaCTX-M-9	E. coli	Negative control