Table 3. Antibiotic susceptibility of E. coli WT and derivative strains.

Strain	CHL	CIP	TET	NM	GNT	AMP
E. coli WT	4	1	2	8	16	4
E. coli Δhfq	2*	0.25	0.25	2	8	2
E. coli WT/phfq	16	8	32	32	128	64
E. coli WT/phfq+MtvR	2	0.25	0.5	2	1	0.5
E. coli WT/pMLBAD	4	1	2	8	16	4
E. coli WT/MtvR	1	0.125	0.125	4	8	2
E. coli Δhfq/pMLBAD	64*	≤0.125	0.125	1	8	2
E. coli Δhfq/phfq	>512*	1	2	8	16	4
E. coli Δhfq/MtvR	8*	≤0.125	≤0.125	0.5	0.125	1
E. coli Δhfq/phfq+MtvR	64*	0.125	0.125	4	8	2

CHL, chloramphenicol; CIP, ciprofloxacin; TET, tetracycline; NM, tobramycin; GNT, gentamycin; AMP, ampicillin. Numbers with asterisks represent strains that have a chromosomal chloramphenicol resistance cassette.