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              Open Access  
Copyright: The authors. This article is an open access 
article licensed under the terms of the Creative Commons Attribution License 
(http://creativecommons.org/licenses/by/2.0) which permits unrestricted use, 
distribution and reproduction in any medium, provided the work is properly 
cited. 
 
              
              
              Research 
(Published 
online : 14-07-2013)18.
Evaluation of live gumboro vaccine prepared from 
local variant strain for control of infectious bursal disease in Egypt -
Susan S. El-Mahdy, Manal, A. Afify and A. M. Helal
 
Vet World. 2013; 6(9):
  674-680 
                
              doi: 
              10.14202/vetworld.2013.674-680 
                
  
  
    
                        
 
              Abstract 
 Aim: 
              The present study was designed to evaluate live Gumboro (IBD) 
              vaccine prepared from local variant isolated strain (Egy-IBD Var 
              2009 Vp2 gene-, partial cds submitted in gen bank at accession no. 
              : JN 118617) for controlling IBD problem in Egypt. 
              Material and Methods: Local isolated variant strain was 
              adapted on Baby Grivet Monkey kidney cell line -70(BGM-70) used 
              for preparation of tissue culture (T.C) live vaccine. T.C IBDV had 
              a titer of (10)7.5
              TCID50/ml ((10)4.5
              TCID50 per dose) after five passages in BGM-70 cell 
              culture. Evaluation of prepared vaccine was done in vitro by 
              measuring ELISA, and in vivo by protection % against very virulent 
              or variant field IBD isolated strains. Result:
              Evaluation revealed that the prepared vaccine was safe; 
              sterile; pure; non-immunosuppressive; and efficient. The Geometric 
              Mean Titer (GMT) of ELISA for the prepared vaccine was 8271 and 
              more than 10000 in compared with different commercial IBD 
              vaccines; while protection percentage gave 96-100%; 92-96% and 
              96-98% in groups vaccinated with commercial (intermediate; 
              intermediate plus and classical) IBD vaccines; respectively in 
              compared to 96-100% in group vaccinated with local prepared 
              vaccine when challenged with very virulent or variant IBD isolated 
              strains. 
              Conclusion: We can use live T.C. IBD vaccine prepared from 
              local variant isolated virus strain as method for control IBD 
              disease in Egypt. 
              Keywords: Local variant infectious bursal disease virus (IBDV), 
              live vaccine, tissue culture 
 
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