The potency of newly development H5N8 and H9N2 avian influenza vaccines against the isolated strains in laying hens from Egypt during 2019

Faculty Veterinary Medicine Year: 2021
Type of Publication: ZU Hosted Pages:
Authors:
Journal: Saudi Journal of Biological Sciences ُELSEVIR Volume:
Keywords : , potency , newly development H5N8 , H9N2 avian    
Abstract:
Avian influenza (AI) is a respiratory disease complex syndrome recently recorded in vaccinated flocks causing high economic losses. This study aimed to prepare inactivated vaccine from recently isolated field strains [highly pathogenic avian influenza (HPAI) (H5N8) and low pathogenic avian influenza (LPAI) (H9N2)] and compare the efficiency of the two experimental avian influenza vaccines and some commercial avian influenza H5 and H9N2 vaccines in laying hens. The obtained results indicated that the identified experimental vaccines (H5N8 and H9N2) were protected the flocks from AI as compared to commercial H5N1, H5N3, and H9N2 vaccines, which showed a protection level of 80, 70, and 90%, respectively, indicating a high efficacy for the developed vaccines. In addition, it significantly improved the virus shedding, especially when used in booster dose. The experimental vaccines were given high antibody titer higher than commercial vaccine which was reached to 9.3 log2, 9.7log2 for experimental H5N8 vaccine which was significantly higher than and groups 3 and 4 especially at 2nd WPV, while at the 3rd WPV, the significant difference was with group 4 only. The HI titer was 9.3 log2 at 2nd WPV for the experimental H9N2 vaccine that was significantly higher than group 9. In conclusion, the booster dose of the experimental vaccines could elicit strong immunity than single-dose and commercial vaccines
   
     
 
       

Author Related Publications

  • Ahmed Mohamed Alsadek Masoud Hegazyi, "The effect of Ecoli infection on chickens immune response, Hegazy, A.M. and E", لايوجد, 1900 More
  • Ahmed Mohamed Alsadek Masoud Hegazyi, "The picture of immune response in chickens vaccinated with ND vaccines ", لايوجد, 1900 More
  • Ahmed Mohamed Alsadek Masoud Hegazyi, "Studies on the incidence of different types of clostridia in chickens in Egypt. A.El-Ged and A.M. Hegazy. Annuals of Agri. ", لايوجد, 1900 More
  • Ahmed Mohamed Alsadek Masoud Hegazyi, "Bacterial causes of ascites in chickens", لايوجد, 1900 More
  • Ahmed Mohamed Alsadek Masoud Hegazyi, "Viral agents associated with rertarded growth in broiler chickens. AM. Hegaz", لايوجد, 1900 More

Department Related Publications

  • Mohamed TalaatAbdou Mohamed El-Sadony, "Biosynthesis, Optimization and Characterization of Silver Nanoparticles Using a Soil Isolate of Bacillus pseudomycoides MT32 and their Antifungal Activity Against some Pathogenic Fungi", Biosynthesis, Optimization, 2019 More
  • Samir Ahmed Merghani Mahgoub, "Enhancement of drought tolerance in diverse Vicia faba cultivars by inoculation with plant growth-promoting rhizobacteria under newly reclaimed soil conditions", Nature, 2021 More
  • Samir Ahmed Merghani Mahgoub, "Productive performance, fertility and hatchability, blood indices and gut microbial load in laying quails as affected by two types of probiotic bacteria", Elsevier, 2021 More
  • Mohamed TalaatAbdou Mohamed El-Sadony, "Impacts of Supplementing Broiler Diets with Biological Curcumin, Zinc Nanoparticles and Bacillus licheniformis on Growth, Carcass Traits, Blood Indices, Meat Quality and Cecal Microbial Load", MDPI, 2021 More
  • Mohamed TalaatAbdou Mohamed El-Sadony, "Impacts of dietary supplementation of pyocyanin powder on growth performance, carcase traits, blood chemistry, meat quality and gut microbial activity of broilers", Taylor and Francis, 2021 More
Tweet