Vaccination against infectious bronchitis virus: A continuous …
2017年7月1日 · Novel vaccines are needed to combat emerging and variant IBV serotypes. Other factors that can influence the outcome of vaccination, including application method, vaccine combinations, chicken genetics, and immune responses, must be taken into account when developing vaccines.
Avian Infectious Bronchitis in China: Epidemiology, Vaccination, …
In this review, the history and current IB occurrence in China, as well as the development and use of vaccines, are summarized. Based on recent epidemics, reasonable vaccination strategies are recommended, and some inadequate measures commonly used in the field are analyzed.
Avian infectious bronchitis - Wikipedia
At present, IB is more common and far more spread than EDS. The large genetic and phenotypic diversity of IBV have been resulting in common vaccination failures. In addition, new strains of IBV, not present in commercial vaccines, can cause the disease in IB vaccinated flocks.
Vaccine - ScienceDirect
Safety and efficacy of attenuated Eg/1212B vaccine strain against IB GI-23 virulent viruses have been illustrated according to European standards. Avian infectious bronchitis virus (IBV) is responsible for a highly contagious disease that poses a significant threat to the poultry industry due to its high rates of evolution.
Efficacy of commercial polyvalent avian infectious bronchitis vaccines ...
2020年7月24日 · Four polyvalent vaccines, containing 4/91, H120, YX10p90, LDT3-A, and 28/86, were combined to form 8 vaccination strategies, almost all of which could provide more than 70% protection effects against challenge with QX-like strain.
Progress and Challenges toward the Development of Vaccines …
Although live attenuated IB vaccines remarkably induce potent immune response, the potential risk of reversion to virulence, neutralization by the maternal antibodies, and recombination and mutation events are important concern on their usage.
Efficacy of commercial polyvalent avian infectious bronchitis vaccines ...
Four polyvalent vaccines, containing 4/91, H120, YX10p90, LDT3-A, and 28/86, were combined to form 8 vaccination strategies, almost all of which could provide more than 70% protection effects against challenge with QX-like strain.
Factor Influences for Diagnosis and Vaccination of Avian Infectious ...
Vaccination is the most significant method for the prevention and control of IBV in the field. Previous reports demonstrated that live vaccines commonly stimulated both local protection and systemic immunity, but inactivated vaccines provide prolonged immunity after inducing with live-attenuated vaccine [23].
Avian Infectious Bronchitis in China: Epidemiology, Vaccination, …
2021年12月9日 · In this review, the history and current IB occurrence in China, as well as the development and use of vaccines, are summarized. Based on recent epidemics, reasonable vaccination strategies are recommended, and some inadequate measures commonly used in the field are analyzed. You do not currently have access to this content.
Efficacy of H120 and Ma5 avian infectious bronchitis vaccines
In this study, we compare the H120 and Ma5 vaccines' protection against early challenge with the QX strain in commercial chicks. one-day-old commercial chicks were divided into six groups. Groups 1 and 2 were unvaccinated groups.