Table 3  Population differentiation as measured by Fst
American (15)0
African (5)0.0750
European (11)0.087−0.0210
Asian (7)0.0090.020.0350
Unknown origin (9)0.044−0.010.0510.0220
  • The sequence data from the 40 compound haplotypes were used to estimate pairwise Fst measures of population differentiation using the Arlequin package. Haplotypes (e.g. haplotypes 16 and 18) containing strains of different origins were considered as being of unknown origin. The numbers of strains in the respective populations are indicated in parentheses. Haplotypes containing strains of different known origins were assigned multiply to different populations and thus the sum of the numbers in brackets exceeds 40.