| molecular epidemiology of infectious bursal disease virus in zambia. | nucleotide sequences of the vp2 hypervariable region (vp2-hvr) of 10 infectious bursal disease viruses detected in indigenous and exotic chickens in zambia from 2004 to 2005 were determined. phylogenetic analysis showed that the viruses diverged into two genotypes and belonged to the african very virulent types (vv1 and vv2). in the phylogenetic tree, strains in one genotype clustered in a distinct group and were closely related to some strains isolated in western africa (vv1), with nucleotide s ... | 2013 | 25687581 |