FIG.1.

HRSV-B G protein maximum likelihood phylogenetic tree. The nucleotide sequences of the G protein gene of the Belgian isolates (BE) were compared with those from Buenos Aires (BA), District of Columbia (CH), Montevideo (MON), New Mexico (NM), New York (NY), Sweden (SW), and West Virginia (WV). The reference strain SW/8/60 was used as outgroup sequence in the tree. Numbers at internal nodes represent bootstrap percentages, as determined for 1,000 iterations by the neighbor-joining method. Only bootstrap values greater than 75% are shown. The italicized numbers in brackets at the terminal nodes correspond to the number of identical sequences. The genetic clusters obtained in the analysis are indicated by the square brackets and assigned as GB1 to GB13. The predicted G protein lengths are designated in boldface; exceptions are indicated next to the corresponding sequence.