Isolation and Molecular Identification of Ibv Isolates in Different Governorates in Egypt

Ghetas, A. M.; Kutkat, M. A.; Amer, Mohammad H; Awaad, M.

doi:10.21608/jesp.2016.88682

Cited by 2 publications

(2 citation statements)

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“…IBV variants belonged to IBV genotype Ⅰ (GⅠ-23) lineage were the most frequently identified [9]. Despite intensive vaccination program, IBV variants belonging to GⅠ-23 lineage continue to detect frequently from vaccinated chickens in different Egyptian governorates causing significant economic losses [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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

Ghetas,

Bosila,

Rabie

et al. 2025

Egyptian Journal of Veterinary Sciences

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UR 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 of turkey meat.

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Section: Introductionmentioning

confidence: 99%

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

Ghetas,

Bosila,

Rabie

et al. 2025

Egyptian Journal of Veterinary Sciences

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“…The Egyptian variant-1 strain ( Abdel-Moneim et al , 2002 ) and Egyptian variant-2 ( Abdel-Moneim et al , 2012 ) were identified and classified as the GI-23 lineage. The GI-23 is considered the most prevalent lineage in Egypt as a result of its circulating in all flocks of chicken up till now ( Ghetas et al , 2016 ; Abdel-Sabour et al , 2017 ; Moharam et al , 2020 ; Sabra et al , 2020 ).…”

Section: Introductionmentioning

confidence: 99%

The efficacy of simultaneous successive classic and variant infectious bronchitis virus vaccines versus circulating variant II Egyptian field virus

Eid,

Mahmoud,

Hamouda

et al. 2024

Open Vet J

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Background: Being a ubiquitous, highly contagious virus with a continuous mutation and a large number of evolutions worldwide, the infectious bronchitis virus (IBV) continues to wreak problems among Egyptian chickens and generate economic losses. The commonly applied IBV vaccination protocols in broilers include alternatives to classic and/or variant attenuated live virus vaccines. Aim: The current study targeted to assess the protective efficacy of concurrent and successive Ma5 and 4/91 vaccine strain regimens against the field variant II IBV strain (IBV-EGY-ZU/Ck-127/2021) in chickens. Methods: Commercial broiler chickens were vaccinated with Ma5 and 4/91 strains simultaneously at 1 and 14 days of age. The evaluation parameters included clinical protection and humoral and early innate immunity aspects in the renal tissues of vaccinated and infected birds. Results: The vaccine regimen ameliorated the clinical and histopathological lesions against variant II IBV and enhanced body gain as well as it succeeded in preventing tracheal shedding and minimizing cloacal shedding of the field virus. The IL-1β mRNA gene expression was evident as early as 24 hours, with highly significant upregulation at 48 hours post-vaccination and 24 hours post-challenge in vaccinated birds. Remarkable upregulation was observed in OAS expression 48 hours post-challenge in vaccinated and unvaccinated infected birds. The vaccinated birds developed a significant antibody titer of 704.0±111.98 at 28 days of age, with a consistent antibody titer increase after the challenge. Conclusion: Overall, a combination of heterologous protectotype commercial vaccines achieved good protection against the Egyptian variant II IBV strain. This vaccine program could be an effective protocol against the threat posed by IBV viruses circulating in the Egyptian field.

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Isolation and Molecular Identification of Ibv Isolates in Different Governorates in Egypt

Cited by 2 publications

References 0 publications

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

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

The efficacy of simultaneous successive classic and variant infectious bronchitis virus vaccines versus circulating variant II Egyptian field virus

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