FIG 2.

Maximum likelihood tree of yellow fever virus. The maximum clade credibility tree inferred using yellow fever virus (YFV) sequences (213 nt) is shown (corresponding to position 9020 to 9232 compared to the nucleotide sequence of YFV-17D, GenBank accession number: X03700). The bootstrap values (1.000 replicates) are represented by circles drawn in scale in the nodes. Sequences generated in this study are highlighted in pink. The clade containing samples from genotype South American I is represented in black. For clarity purposes, some branches representing different genotypes were collapsed and colored as follows: West African II/vaccine strains (purple), West African I (red), East/Central African (yellow), and Angola (blue). The tree was reconstructed using the nucleotide substitution model kimura 2-parameters with 4-categories gamma distribution. The analysis was performed using MEGAX and the tree visualized and edited in FigTree v1.4.4.