title: Sequence comparison of the VP2 variable region of infectious bursal disease virus isolates from Vietnam.
abstract: The variable region in the VP2 gene of twenty-three infectious bursal disease virus (IBDV) isolates, collected in Vietnam in 1997 and 1998, was amplified as cDNA by using the reverse transcription-polymerase chain reaction and sequenced. Analysis of amino acid substitutions and phylogenetic relationships of the deduced amino acid sequences (residues 206-350) showed that the nineteen Vietnamese vv IBDVs clustered with the European vv IBDVs, Japanese vv IBDVs and Chinese vv strains, and that the four vietnamese virulent strains were closely related to European virulent strain 52/70. These results suggest that Vietnamese vv IBDVs, European vv IBDVs, Japanese vv IBDVs and Chinese vv strains have the same origin.
authors.affiliation: Department of Veterinary Microbiology, Faculty of Agriculture, Gifu University, Japan.
authors.forename: H
authors.initials: H
authors.lastname: To
authors.forename: T
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: N T
authors.initials: NT
authors.lastname: Nguyen
authors.forename: O T
authors.initials: OT
authors.lastname: Nguyen
authors.forename: S V
authors.initials: SV
authors.lastname: Nguyen
authors.forename: S
authors.initials: S
authors.lastname: Agus
authors.forename: H J
authors.initials: HJ
authors.lastname: Kim
authors.forename: H
authors.initials: H
authors.lastname: Fukushi
authors.forename: K
authors.initials: K
authors.lastname: Hirai
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D018175:Birnaviridae Infections / Q000453:epidemiology / Q000662:veterinary* / Q000821:virology; D002645:Chickens; D004196:Disease Outbreaks; D007243:Infectious bursal disease virus / Q000145:classification*; D008969:Molecular Sequence Data; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D011201:Poultry Diseases / Q000453:epidemiology* / Q000821:virology*; D014744:Vietnam / Q000453:epidemiology; D015678:Viral Structural Proteins / Q000737:chemistry*
chemical_list: C082513:VP2 protein, infectious bursal disease virus; D015678:Viral Structural Proteins