Table 1: E. coli O157:H7 strains.

StrainOriginal sourceMLVA profile*

EDL 933Reference strain10, 8, 11, 3, 5, 6, 13, 23, 7
HT2-15Ground beef9, 8, 70, 70, 5, 8, 4, 11, 7
FB3Feedlot cattle8, 11, 8, 2, 5, 7, 12, 40, 6
FB22Feedlot cattle8, 9, 6, 2, 6, 9, 6, 43, 6
FB81Feedlot cattle8, 9, 6, 2, 6, 10, 6, 25, 6
FC O157Feedlot cattle10, 8, 70, 1, 4, 9, 7, 23, 7
665pGrazing cattle9, 11, 6, 2, 5, 9, 7, 27, 6
Gal26Human6, 70, 12, 3, 3, 8, 3, 70, 9
Mat 167/6Human9, 15, 70, 1, 4, 8, 8, 28, 7

*String order: Vhec2, Vhec4, Vhec7, TR3, TR4, TR7, O157-3, O157-10, and O157-37. The value represents the number of TRs at each locus. Vhec loci are from Lindstedt et al. [22], TR loci from Noller et al. [15], and O157-n loci from Keys et al. [23]. Null alleles were designated as 70.