| evolutionary dynamics of west nile virus in the united states, 1999-2011: phylogeny, selection pressure and evolutionary time-scale analysis. | west nile virus (wnv), an arbovirus maintained in a bird-mosquito enzootic cycle, can infect other vertebrates including humans. wnv was first reported in the us in 1999 where, to date, three genotypes belonging to wnv lineage i have been described (ny99, wn02, sw/wn03). we report here the wnv sequences obtained from two birds, one mosquito, and 29 selected human samples acquired during the us epidemics from 2006-2011 and our examination of the evolutionary dynamics in the open-reading frame of ... | 2013 | 23738027 |