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Investigation of the antigenic evolution of field isolates using the reverse genetics system of infectious bursal disease virus (IBDV)
被引:30
作者:
Durairaj, Vijay
[1
]
Sellers, Holly S.
[1
]
Linnemann, Erich G.
[1
]
Icard, Alan H.
[1
]
Mundt, Egbert
[1
]
机构:
[1] Univ Georgia, Coll Vet Med, Poultry Diagnost & Res Ctr, Athens, GA 30602 USA
关键词:
AMINO-ACIDS;
NUCLEOTIDE-SEQUENCES;
DIFFERENT STRAINS;
ESCHERICHIA-COLI;
GENOMIC SEGMENT;
MOLECULAR-BASIS;
SEROTYPES;
VP2;
GENE;
RNA;
DIFFERENTIATION;
D O I:
10.1007/s00705-011-1040-x
中图分类号:
Q93 [微生物学];
学科分类号:
071005 ;
100705 ;
摘要:
The antigenic profiles of over 300 infectious bursal disease virus (IBDV) isolates were analyzed using a panel of monoclonal antibodies in a reverse genetics system. In addition, the sequences of a large portion of the neutralizing-antibody-inducing VP2 of IBDV were determined. Phylogenetic analysis of nucleotide and amino acid sequences in combination with the antigenic profiles obtained using the monoclonal antibody panel, revealed a lack of correlation between antigenicity and isolate's placement within the phylogenetic tree. In-depth analysis of amino acid exchanges revealed that changes within a certain region of the VP2 molecule resulted in differences in the antigenicity of the virus. This comprehensive analysis of VP2 sequences indicated a high selective pressure in the field that was likely due to vaccination programs, which increase the rate of evolution of the virus.
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页码:1717 / 1728
页数:12
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