TABLE 1.

Strains used in this study

Strain	Description	Reference or source
B171-8	Wild-type EPEC 0111:NM; carries the 80-kb EAF plasmid	18
B171-8ΔAcm	B171-8 EAF plasmid mutant with an in-frame deletion of the bfpA gene	3
B171-8ΔB	B171-8 EAF plasmid mutant with base pair substitutions in the bfpB sequence resulting in translational stop codons at amino acids 40, 41, and 43	45
B171-8ΔB2	B171-8 EAF plasmid mutant with an in-frame deletion of the bfpB gene	Ramer, unpublished
B171-8ΔG	B171-8 EAF plasmid mutant with an in-frame deletion of the bfpG gene	Ramer, unpublished