TABLE 1.

Bacterial strains used in this study

Bacteria	Strain	No. of strains	Source	Genotypea	Antibiotic susceptibility	Reference(s) or source
Donor strains
E. coli K-12 strain C600	LysφA9Cm	1	Laboratory lysogen	Δstx2::cat	Cmr Nals Tcs	29
E. coli K-12 strain C600	Lys933WCm	1	Laboratory lysogen	Δstx2::cat	Cmr Nals Tcs	29
E. coli K-12 strain DH5α	LysφA557Cm	1	Laboratory lysogen	Δstx2::cat	Cmr Nals Tcs	29
E. coli K-12 strain DH5α	LysφVTB55Cm	1	Laboratory lysogen	Δstx2::cat	Cmr Nals Tcs	29
E. coli K-12 strain DH5α	LysφA312Cm	1	Laboratory lysogen	Δstx2::cat	Cmr Nals Tcs	29
E. coli K-12 strain DH5α	LysφA549Cm	1	Laboratory lysogen	Δstx2::cat	Cmr Nals Tcs	29
E. coli K-12 strain DH5α	LysφA534Cm	1	Laboratory lysogen	Δstx2::cat	Cmr Nals Tcs	29
E. coli K-12 strain C600	C600φ3538	1	Laboratory lysogen	Δstx2::cat	Cmr Nals Tcs	28
Recipient strains
E. coli	O157:H7	35	Cattle and environment	stx1−, stx2+, and variable (+ or −) for eae and EHEC hly	Tcr Cms	14, 22
E. coli	Non-O157:H7	18	Cattle, sheep, and food	stx1−, stx2+, and variable (+ or −) for eae and EHEC hly	Tcr Cms	14, 22
E. coli	Non-O157:H7	4	Human	stx1−, stx2−, eae−, EHEC hly−	Tcr Cms	This study
Klebsiella pneumoniae	CF55	1	Environment		Tcr Cms	This study
Shigella flexneri		2	Human		Tcr Cms	25
Shigella sonnei		2	Human		Tcr Cms	25
E. coli K-12	C600Nal	1	Laboratory		Nalr Cms	This study
E. coli K-12	WG5	1	ATCC 700078		Nalr Cms	4

^aEHEC, enterohemorrhagic Escherichia coli.