| genetic variability of human metapneumovirus isolated from chilean children, 2003-2004. | human metapneumovirus (hmpv) is a significant cause of acute lower respiratory tract infection in all age groups, particularly in children. two genetic groups and four subgroups of hmpv have been described. they co-circulate during an epidemic in variable proportions. the aims were to characterize the genotypes of hmpv recovered from children hospitalized for acute lower respiratory tract infection and to establish the molecular epidemiology of strains circulating in santiago of chile during a 2 ... | 2009 | 19107972 |