TABLE 1

Strains used in this study

StrainDescriptionReference or source
JM109K-12 laboratory strain13
EIEC 6.81Enteroinvasive strain E. coli 6.817
ED32ED32 wild-type strain: stx negative, LEE negative, and SE-PAI positive6
ED32 ΔtiaED32 strain (6) in which the gene tia has been inactivated by the partial replacement of the gene with a Km resistance cassetteThis study
ED32 Δtia/pGEM_tiaED32 Δtia strain carrying the plasmid pGEM_tia to complement the tia mutationThis study
ED97ED97 wild-type strain: stx positive, LEE negative, and SE-PAI positive6