Fig. 2.

Phylogenetic analysis of partial F gene sequences from Cambodian and reference HMPV strains. Phylogeny was constructed using the neighbour-joining method with 1000 bootstrap replicates. Only bootstrap values  > 70% are 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. Cambodian strains are indicated by ‘Cam’ followed by the year of collection. Cambodian strains isolated from Takeo province are indicated by ●; strains collected in Kampong Cham province by ▴. Lineages are indicated. An avian metapneumovirus (AMPV) strain was used as an outgroup.