Analysis of the Sequence of Variable Region in vp2 of Infectiousbursal disease virus Isolated from Diferent Bird Species
Abstract: Abstract:According to the published cDNA sequences of Infectious bursal disease virus(IBDV),a pairof primers to variable region in VP2 were designed for cDNA synthesis and PCR amplification of fourIBDV isolated from different bird species,CH,DU,GE and SP.The nucleotide sequences determinedhave been compared to each other.Th e four isolates are closely related,the homology of the four iso—lates being 97% at the nucleotied level and 98% at the amino acid leve1.Th eir two hydrophilic regionsand one heptapeptide were identical at the amino acid leve1. Th e results revealed that the ducks,geeseand sparrows naturally infected with IBDV not only could become the carriers or reservoirs in transmis—sion but may take certain effect on the variation of IBDV.