Table 2. Colistin MICs in the mcr-1 harboring Enterobacteriaceae.

Strain	Colistin MIC (mg/L)
Escherichia coli USU-ECO-12704	4
Enterobacter aerogenes CRENT-301	32
E. coli CREC-257	4
E. coli ATCC 25922	0.5
E. coli EJ53-RifR	0.5
E. coli EJ53-RifR / pUSU-ECO-12704_4	4
Klebsiella pneumoniae Kpn-RifR	2
K. pneumoniae Kpn-RifR / pUSU-ECO-12704_4	8
Enterobacter cloacae Ecl-RifR	0.5
E. cloacae Ecl-RifR / pUSU-ECO-12704_4	1

Abbreviation: MIC, minimal inhibitory concentration.