Table 1.

Strains used in this study

Strain	Main Features	Reference
C227–11	wild type, pAA, AggR, AAF/I, Stx2a, Pic, SigA, SepA	[29]
C227–11::qseC	qseC mutant,inserted with R6K-based suicide vector, Kmr	[42]
C227–11 qseC+	qseC complemented strain with constitutive low-copy pBAD33- Gmr	[42]
DH5α	E. coli supE44 ΔlacU169(ϕ80lacZΔM15) hsdR17	Stratagene
042	EAEC prototype strain, O44:H18 (Stx−) (isolated in diarrheal case in Peru)	[76]