Leptospira spp. Prevalence in Small Mammal Populations in Cotonou, Benin

Figure 2

Phylogenetic tree of isolates from Cotonou and Leptospira reference strains. Phylogenetic tree of partial secY sequences. The evolutionary history was inferred using the neighbor-Joining method [20]. The optimal tree with the sum of branch length = 0.78179174 is shown. The tree is drawn to scale, with branch lengths in the same units as those of the evolutionary distances used to infer the phylogenetic tree. All positions containing alignment gaps and missing data were eliminated only in pairwise sequence comparisons (pairwise deletion option). There were a total of 137 positions in the final dataset. Phylogenetic analyses were conducted in MEGA4 [21]. Codes of strains and infections are as listed in Table 1.