Table 1.

MICs (mg/L) of ATM and ATM-AVI against strains used in this study.

Strain	ATM	ATM-AVI
WCHEC96200	>1,024	16
BL21	0.015	0.015
BL21:pET-28	0.015	0.015
BL21::CTX-M-14	64	0.015
BL21::CTX-M-15	128	0.03
BL21::CTX-M-199	128	0.03
035125△pCMY42	2	1
035125△pCMY42::pET-28	2	1
035125△pCMY42::CTX-M-14	64	4
035125△pCMY42::CTX-M-15	128	16
035125△pCMY42::CTX-M-199	128	16

MICs that have reached or exceeded the resistant breakpoints are highlighted in bold.