Table 1. Genetic diversity among mutS alleles in S. enterica SARC clades.

	Mean nucleotide diversity ± SE, %
Clade (n)	II	IIIa	IIIb	IV	V	VI	VII
I (2)	3.00 ± 0.48	7.50 ± 0.87	4.60 ± 0.66	4.50 ± 0.63	11.40 ± 1.25	2.20 ± 0.41	4.20 ± 0.60
II (2)	8.30 ± 0.95	5.50 ± 0.72	5.20 ± 0.66	12.40 ± 1.21	3.10 ± 0.47	5.00 ± 0.66
IIIa (2)	7.10 ± 0.83	7.70 ± 0.89	11.40 ± 1.19	7.10 ± 0.84	7.30 ± 0.85
IIIb (2)	6.10 ± 0.79	12.30 ± 1.25	4.20 ± 0.58	6.00 ± 0.78
IV (2)	12.90 ± 1.28	4.40 ± 0.62	1.90 ± 0.40
V (2)	11.30 ± 1.14	12.60 ± 1.26
VI (2)	4.40 ± 0.62

Mean pairwise mutS sequence variation among the eight subspecies (clades) of the S. enterica SARC collection defined in Fig. 1. The distances shown are Jukes—Cantor-corrected and were calculated by using the program mega 2 (26).