| ten years of global evolution of the human respiratory syncytial virus ba genotype with a 60-nucleotide duplication in the g protein gene. | the emergence of natural isolates of human respiratory syncytial virus group b (hrsv-b) with a 60-nucleotide (nt) duplication in the g protein gene in buenos aires, argentina, in 1999 (a. trento et al., j. gen. virol. 84:3115-3120, 2003) and their dissemination worldwide allowed us to use the duplicated segment as a natural tag to examine in detail the evolution of hrsv during propagation in its natural host. viruses with the duplicated segment were all clustered in a new genotype, named ba (a. ... | 2010 | 20504933 |