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Thursday, 13 July 2017

Effects of Nigella sativa on immune responses and pathogenesis of avian influenza (H9N2) virus in turkeys

Journal of Applied Poultry ResearchVolume 25, Issue 1, 6 November 2015, Pages 95-103

(Article)

  • aDepartment of Pathobiology, University of Arid Agriculture, Rawalpindi, Pakistan
  • bNational Veterinary School, Toulouse, France
  • cFriedrich-Loeffler-Institute of Epidemiology, Berlin, Germany

Abstract View references (38)

The main objective of this study was to determine the effects of various levels of dietary Nigella sativa seeds on immune-responsiveness and pathogenesis of H9N2 avian influenza virus (AIV) in Turkeys. The experiment was performed on 80 unvaccinated Turkey poults, divided into four groups of 20 birds each. Group A was kept as a non-infected, non-treated negative control; group B was inoculated intranasally with H9N2 AIV (106 EID50) at 4 wk of age; groups C and D were fed on diets containing 1% and 3% Nigella sativa seeds, respectively, from d 1 through the entire experiment period and inoculated intranasally with H9N2 AIV (106 EID50) at the wk 4 of age. Infected birds showed clinical signs of differing severity, with the most prominent disease signs appearing in birds of the H9N2 group. All infected birds showed positive results for virus shedding; however, the pattern of virus shedding was different, with birds of group B showing more pronounced virus secretion than the birds in the groups C and D, which were fed different levels of N. sativa. Moreover, significantly higher antibody titer against H9N2 AIV in group D birds show the immunomodulatory nature of N. sativa. Similarly, increased IFN-γ mRNA expression suggest antiviral behavior of N. sativa, leading to suppressed pathogenesis of H9N2 viruses in N. sativa-fed birds.This study showed that dietary supplementation with N. sativa seed at the level of 3% would enhance immune responsiveness and suppress pathogenicity of influenza viruses in Turkeys. © 2016 2015 Poultry Science Association Inc.

Author keywords

  • avian influenza
  •  
  • H9N2
  •  
  • Nigella sativa
  •  
  • Turkey
  • ISSN: 10566171
  • Source Type: Journal
  • Original language: English
  • DOI: 10.3382/japr/pfv070
  • Document Type: Article
  • Publisher: Oxford University Press

  Umar, S.; Department of Pathobiology, University of Arid Agriculture, Rawalpindi, Pakistan; email:s.umar@envt.fr 
© Copyright 2016 Elsevier B.V., All rights reserved.