Dynamic of Mutational Events in Variable Number Tandem Repeats of Escherichia coli O157:H7

Table 1

E. coli O157:H7 strains.

Strain	Original source	MLVA profile*
EDL 933	Reference strain	10, 8, 11, 3, 5, 6, 13, 23, 7
HT2-15	Ground beef	9, 8, 70, 70, 5, 8, 4, 11, 7
FB3	Feedlot cattle	8, 11, 8, 2, 5, 7, 12, 40, 6
FB22	Feedlot cattle	8, 9, 6, 2, 6, 9, 6, 43, 6
FB81	Feedlot cattle	8, 9, 6, 2, 6, 10, 6, 25, 6
FC O157	Feedlot cattle	10, 8, 70, 1, 4, 9, 7, 23, 7
665p	Grazing cattle	9, 11, 6, 2, 5, 9, 7, 27, 6
Gal26	Human	6, 70, 12, 3, 3, 8, 3, 70, 9
Mat 167/6	Human	9, 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.