Table 1.

Summary of gene sequence heterogeneity between various clinical isolate groups

Isolate group	n	Total number of SNP’sa	Total number of NSS’sb
U.S.A	28	21	7
French	32	17	5
Japan	30	21	9
Combined	90	59	12

^aSNP: single nucleotide polymorphisms

^bNSS: nonsynonymous single nucleotide polymorphisms.