The Effect of Infectious Bronchitis Virus Vaccine on Pathogenicity of Aavian Pathogenic E. coli in Broiler Chickens
Ghetas, A., Bosila, M., Rabie, N., Abdelbaki, M. (2025). The Effect of Infectious Bronchitis Virus Vaccine on Pathogenicity of Aavian Pathogenic E. coli in Broiler Chickens. EKB Journal Management System, 56(5), 1053-1060. doi: 10.21608/ejvs.2024.278543.1952
Aly Mohamed Ghetas; Mohamed Bosila; Nagwa Saad Rabie; Mohamed Mahmoud Abdelbaki. "The Effect of Infectious Bronchitis Virus Vaccine on Pathogenicity of Aavian Pathogenic E. coli in Broiler Chickens". EKB Journal Management System, 56, 5, 2025, 1053-1060. doi: 10.21608/ejvs.2024.278543.1952
Ghetas, A., Bosila, M., Rabie, N., Abdelbaki, M. (2025). 'The Effect of Infectious Bronchitis Virus Vaccine on Pathogenicity of Aavian Pathogenic E. coli in Broiler Chickens', EKB Journal Management System, 56(5), pp. 1053-1060. doi: 10.21608/ejvs.2024.278543.1952
Ghetas, A., Bosila, M., Rabie, N., Abdelbaki, M. The Effect of Infectious Bronchitis Virus Vaccine on Pathogenicity of Aavian Pathogenic E. coli in Broiler Chickens. EKB Journal Management System, 2025; 56(5): 1053-1060. doi: 10.21608/ejvs.2024.278543.1952

The Effect of Infectious Bronchitis Virus Vaccine on Pathogenicity of Aavian Pathogenic E. coli in Broiler Chickens

Egyptian Journal of Veterinary Sciences
Volume 56, Issue 5, May 2025, Page 1053-1060  XML PDF (1.17 MB)
Document Type: Original Article
DOI: 10.21608/ejvs.2024.278543.1952
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Authors
Aly Mohamed Ghetas1; Mohamed Bosila2; Nagwa Saad Rabieorcid 3; Mohamed Mahmoud Abdelbaki email orcid 4
1Poultry diseases dept., Veterinary research institute, National research centre, Egypt.
2Dept of Poultry. Diseases, Vet. Res. Division, National Research centre
3National Research Centre ,Cairo
4Poultry diseases dept., Veterinary research institute, National research centre, Egypt
Abstract
Our study was conducted to describe the pathogenicity of avian pathogenic E. coli (APEC) O78 in infectious bronchitis (IB) virus (IBV) vaccinated broiler chickens. Broiler chickens vaccinated at 1 day old and 14 days old with H120 and IB var2 vaccines respectively were challenged with APEC O78 strain 4 days later. This group was compared with vaccinated/unchallenged, unvaccinated/challenged, and unvaccinated/unchallenged broiler chicken groups. Clinical signs, postmortem findings, body weight, body-weight uniformity, pathological findings, and bacterial count from different tissues which measured 3 and 7 days post challenge (DPC) were used as an evaluation parameters. In our study, IBV live attenuated vaccines (IBV H120 and IB var2) followed by APEC O78 challenge improved colibacillosis clinical signs, pathological findings, and bacterial count in chicken tissues 3 DPC than 7 DPC comparing to unvaccinated/challenged group. However, body-weight uniformity was negatively affected 10 DPC in vaccinated/challenged group comparing to other chicken groups. From an applied perspective, prevention of APEC infection is required to avoid the adverse effect on body-weight uniformity after vaccination with IBV live attenuated vaccines.
Keywords
Avian pathogenic E. coli; Colibacillosis; IBV; Vaccines; Broilers
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