Recent approaches for control of E. coli and respiratory complex in Middle East
| Autor: | Mohamed Abdrabou, Hussein M. Galal, Azza M. Tawfek, Ihab M. Moussa, Ayman Elbehiry, Jwaher Haji Alhaaji, Ashgan M. Hessain, Saleh A. Kabli, Waleed K. Alwarhi |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
animal structures 040301 veterinary sciences Virulence Infectious bronchitis virus Biology medicine.disease_cause Newcastle disease Article Virus Infectious bursal disease Serology 0403 veterinary science 03 medical and health sciences medicine lcsh:QH301-705.5 Viral Vaccine 04 agricultural and veterinary sciences medicine.disease biology.organism_classification Virology Influenza A virus subtype H5N1 030104 developmental biology lcsh:Biology (General) embryonic structures General Agricultural and Biological Sciences |
| Zdroj: | Saudi Journal of Biological Sciences, Vol 25, Iss 7, Pp 1302-1307 (2018) |
| ISSN: | 1319-562X |
| DOI: | 10.1016/j.sjbs.2018.04.004 |
| Popis: | This study was conducted on 100 one-day-old broiler chicks to evaluate the effect of Poulvac E. coli vaccine in reduction of clinical signs and complications after concurrent infectious bronchitis virus (variant 02) and virulent E. coli O78 challenges. The birds were evaluated for clinical signs, mortality for 7 days post-infection, PM lesion score, average body weight and serological evaluation. Re-isolation and RT-PCR for the challenging infectious bronchitis virus (IBV) variant 02 were conducted thereafter. The results showed that the Poulvac E. coli at one-day old chicks in the presence of co-infection with virulent E. coli and IBV variant 02 provides better body weight gain at 35 days than the other groups. The challenge with IBV variant 02 alone in non-vaccinated birds doesn’t give any mortality; this indicated that the severity of IBV variant 02 increased by the presence of co-infection with Avian Pathogenic E. coli (APEc). The mortality percentage associated with both E. coli and IBV variant 02 infections in the none vaccinated group by Poulvac E. coli was 25% while this percentage was 10% of the vaccinated group. The Poulvac E. coli is not negatively affecting the immune response against different concurrent viral vaccines like Infectious bursal disease (IBD), and moreover, it improves the immune response against some others like Newcastle disease virus (NDV), Avian Influenza (AI) H5 and IBV. Keywords: Collibacillosis, Poulvac E. coli vaccine, IBV variant 02 |
| Databáze: | OpenAIRE |
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