Phylogenetic tree (unrooted) of nucleotide sequences based on a 374-nt sequence (position 47–421 nt) of the F gene.
Phylogenetic relationships of MG group strains with previously published sequences in Genbank. The evolutionary history was inferred using the Neighbor-Joining method . All results are based on the pairwise analysis. Analyses were conducted using the Kimura 2-parameter method in MEGA4 ,  with 1,000 bootstraps . The isolates from Madagascar that were subjected to analysis in this work are in bold and red. Genotype or lineage groupings are indicated on the right.