vp2 protein is the major host protective immunogen of infectious bursal disease virus (ibdv) of chickens. plants are now gaining widespread acceptance as a general platform for the large scale production of recombinant proteins including vaccine, antibodies and pharmaceuticals. in present study vp2 gene of an iranian isolate of ibdv was cloned under strong plant expression promoter camv35s and ...

The double-spurred francolin Francolinus bicalcaratus has been identified as a good candidate for future domestication due to the universal acceptability of its meat and its adaptability to anthropogenically altered environments. Therefore, in investigating the diseases to which they are susceptible, serum samples from 56 francolins in a major live-bird market (LBM) in Ibadan, southwestern Nige...

This study was designed to investigate the effects of a probiotic plus an immunomodulatory product on the growth performance, immune response and net economic returns of broiler chicks vaccinated against Infectious bursal diseases virus (IBDV). A flock of 350 day-old chicks were equally and randomly distributed in seven groups, each comprising 50 birds. A mixture of microorganisms (1Probiotic) ...

Investigation to know the hemorrhagic and clotting mechanisms in very virulent (vv) infectious bursal disease virus (IBDV) infection of Malaysian isolate was carried out in chicks. One-hundred-ten, 32-dayold Specific-pathogen-free chicks were divided into IBD and control groups, each consisting 55 chicks. The IBD group was inoculated orally with 0.1 mL/chick of inoculums containing vvIBDV isola...

Chickens susceptible to infectious bursal disease (IBD) became viremic for only a transient period when inoculated with two different strains of infectious bursal disease virus (IBDV). The virus was not isolated from tissues beyond 10 days postinoculation. There was no apparent spread of IBDV to susceptible contact chickens placed with infected groups 16, 30, 42, and 52 days postinoculation. At...

Infectious bursal disease virus (IBDV) is a birnavirus causing immunosuppressive disease in chickens. Emergence of the very virulent form of IBDV (vvIBDV) in the late 1980s dramatically changed the epidemiology of the disease. In this study, we investigated the phylogenetic origins of its genome segments and estimated the time of emergence of their most recent common ancestors. Moreover, with r...

In order to overcome the limitations of conventional vaccines for infectious bursal disease virus (IBDV), we constructed recombinant dual expression system baculoviruses with VP2 and VP2/4/3, the main protective antigens of IBDV. We compared the immune effects of the baculoviruses in avian cells and detected their control effects on chickens with infectious bursal disease. We used Western blot ...

Reverse genetics was used to study the effect of particular amino acids of infectious bursal disease virus (IBDV) on virulence. Using site-directed mutagenesis, altering of two amino acids in VP2 (Q253H, A284T) and VP3 (H783Q, V862M, I921V) in the segment A of a Chinese very virulent IBDV field strain Harbin-1, 4 virus mutants including H253/284, H783/862, H862/921, H921/783 were rescued. To ev...