Table 1.

Specific strains and plasmids associated with the study.

Strain	Genotype	Source
DH10B	F− mcrA Δ(mrr-hsdRMS-mcrBC) Ф80lacZΔM15 ΔlacX74 recA1 endA1 araD139 Δ(ara leu) 7697 galU galK rpsL nupG λ−	Lucigen
E. coli O157:H7 strain Sakai	stx2A::kan Δstx1A′	Dahan et al. (2004)
E. coli O157:H7 strain TUV93-0	ΔBP933-W ΔCP933-V	Campellone et al. (2004)
E. coli O157:H7 strain TUV93-0 Δ148A	TUV93-0 ΔLEE1-3 (4677931–4686861 as defined for the EDL933 genome)	Campellone et al. (2004)
3/A2	DH10B pBAC3/A2	This study
I12	DH10B pV41 containing agaWEFA and uxaC fragment	This study