Alteration of amino acids in VP2 of very virulent infectious bursal disease virus results in tissue culture adaptation and attenuation in chickens
نویسندگان
چکیده
منابع مشابه
Sequence analysis of the VP1 gene in three very virulent Iranian infectious bursal disease virus strains
Infectious bursal disease (IBD) is a highly contagious disease of chickens caused by the infectious bursal disease virus (IBDV). This study was conducted to characterize three IBDV strains from Iran. A reverse transcriptase-polymerase chain reaction (RT-PCR) procedure was used to amplify a 715-bp fragment of the VP1 gene from IBDV strains. Amplified VP1 fragments of the three Iranian IBDV strai...
متن کاملTissue culture infectivity of different strains of infectious bursal disease virus is determined by distinct amino acids in VP2.
Two types of strains of serotype I of infectious bursal disease virus (IBDV) have been described, on the basis of their ability (IBDV-TC) or inability (IBDV-BU) to infect chicken embryonic cells in culture. However, both types infect B lymphocytes in the bursa of Fabricius of young chickens. To determine the molecular basis for tissue culture infectivity, virus recombinants with chimeric segmen...
متن کاملVery Virulent Infectious Bursal Disease Virus
The primary feature of vvIBDV is the ability to induce high mortality. Mortality ranges from 5% – 25% in broilers and 30% – 70% in layers. Surviving birds are severely affected with a high condemnation rate. vvIBDV induces clinical signs similar to Gumboro disease, which is induced by classical virulent strains of IBDV, except that the disease is more pronounced and acute in individual birds an...
متن کاملCloning and Expression of VP2 Gene of Infectious Bursal Disease Virus in Eukaryotic Cells
Infectious bursal disease (IBD) is an economically important viral disease of chickens with worldwide distribution which suppresses the immune system of young chickens. VP2 is the major host-protective protein of infectious bursal disease virus (IBDV). The encoding region of VP2 protein was PCR amplified from a plasmid containing a cDNA fragment of large genomic segment of IBDV, strain D78. Thi...
متن کاملCloning and secretory expression of VP2 gene of infectious bursal disease virus in eukaryotic cells
VP2 gene coding region of a vaccinal strain (D78) of infectious bursal disease virus (IBDV) was clonedin a eukaryotic expression vector, pSec Tag2A. The gene was placed downstream of Ig κ chain leadersequence, under the control of human cytomegalovirus (hCMV) immediate early enhancer and promoter. Theconstruct pSec Tag2A-VP2 was transfected in COS-7 cell line and the expression and secretion of...
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ژورنال
عنوان ژورنال: Journal of General Virology
سال: 2002
ISSN: 0022-1317,1465-2099
DOI: 10.1099/0022-1317-83-1-121