Table 1.

Shiga toxin-producing Escherichia coli reference strains used in this study.

Strain	Other strain designations	Serotype	Source	Location	Provider or referencea
RM1697	Feedlot strain 42	O157:H7	Cattle	United States	Kimura et al. (2000)
RM2016	3323-61; DEC 9a	O26:H11	Human	United States	ECRC (Reid et al., 1999)
RM2028	C142-54; DEC 6b	O111:H12	Human	Germany	ECRC (Reid et al., 1999)
RM2048	A9619-c2; DEC 11c	O45:H2	Human	United States	ECRC (Reid et al., 1999)
RM2084	EDL-933; DEC 4f	O157:H7	Meat	United States	ECRC (Reid et al., 1999)
RM3642	CPK175	O121:NM	Human	Canada	CPKDRC
RM3655	CPK117	O113:H21	Human	Canada	CPKDRC
RM6011	WI_06BC005150	O157:H7	Human	United States	Tim Monson (Cooley et al., 2007)
RM6765	ATCC 23982; H515b	O103:H8	Human	Denmark	ATCC (Ørskov et al., 1977)
RM7006	B2F1; TW01393	O91:H21	Human	Canada	The STEC Center (Ito et al., 1990)
RM7007	T4/97; TW09358	O128:H2	Pigeon	Germany	The STEC Center (Schmidt et al., 2000)
RM7519	F260-H2	O113:H21	Cattle	United States	Laboratory collection
RM12761	EH1605	O145:H28	Ice cream	Belgium	Buvens et al. (2011)
RM13368	3024-94	O104:H21	Human	United States	CDC (1995), Dean-Nystrom et al. (2003)

^aContact information of strain providers: ECRC, E. coli Reference Center, College of Agricultural Sciences, The Pennsylvania State University, University Park, PA, USA; CPKDRC, Canadian Pediatric Kidney Disease Research Centre, Ottawa, Ontario, Canada; Tim Monson, Wisconsin State Laboratory of Hygiene, Madison, WI, USA; ATCC, American Type Culture Collection, Manassas, VA, USA; The STEC Center, National Food Safety and Toxicology Center, Michigan State University, East Lansing, MI, USA.