Avian Infectious Bronchitis in China: Epidemiology, Vaccination, and Control

2021 ◽  
Vol 65 (4) ◽  
Author(s):  
Xiaorong Zhang ◽  
Mengjiao Guo ◽  
Jia Zhao ◽  
Yantao Wu
Keyword(s):  
Infectious Bronchitis ◽  
And Control

scholarly journals Genetic and Pathogenic Characterization of QX(GI-19)-Recombinant Infectious Bronchitis Viruses in South Korea

Viruses ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 1163
Author(s):  
So-Youn Youn ◽  
Ji-Youn Lee ◽  
You-Chan Bae ◽  
Yong-Kuk Kwon ◽  
Hye-Ryoung Kim
Keyword(s):  
Phylogenetic Analysis ◽  
Disease Prevention ◽  
South Korea ◽  
Prevention And Control ◽  
Genetic Recombination ◽  
Detection Methods ◽  
Infectious Bronchitis ◽  
Reference Sequences ◽  
And Control

Infectious bronchitis viruses (IBVs) are evolving continuously via genetic drift and genetic recombination, making disease prevention and control difficult. In this study, we undertook genetic and pathogenic characterization of recombinant IBVs isolated from chickens in South Korea between 2003 and 2019. Phylogenetic analysis showed that 46 IBV isolates belonged to GI-19, which includes nephropathogenic IBVs. Ten isolates formed a new cluster, the genomic sequences of which were different from those of reference sequences. Recombination events in the S1 gene were identified, with putative parental strains identified as QX-like, KM91-like, and GI-15. Recombination detection methods identified three patterns (rGI-19-I, rGI-19-II, and rGI-19-III). To better understand the pathogenicity of recombinant IBVs, we compared the pathogenicity of GI-19 with that of the rGI-19s. The results suggest that rGI-19s may be more likely to cause trachea infections than GI-19, whereas rGI-19s were less pathogenic in the kidney. Additionally, the pathogenicity of rGI-19s varied according to the genotype of the major parent. These results indicate that genetic recombination between heterologous strains belonging to different genotypes has occurred, resulting in the emergence of new recombinant IBVs in South Korea.

scholarly journals Infectious Bronchitis Virus Evolution, Diagnosis and Control

2020 ◽  
Vol 7 (2) ◽  
pp. 79 ◽  
Author(s):  
Matteo Legnardi ◽  
Claudia Maria Tucciarone ◽  
Giovanni Franzo ◽  
Mattia Cecchinato
Keyword(s):  
Infectious Bronchitis Virus ◽  
Immune Escape ◽  
Control Strategies ◽  
Rapid Evolution ◽  
Emerging Diseases ◽  
Economic Losses ◽  
Recombination Rates ◽  
Infectious Bronchitis ◽  
Advantages And Disadvantages ◽  
And Control

RNA viruses are characterized by high mutation and recombination rates, which allow a rapid adaptation to new environments. Most of the emerging diseases and host jumps are therefore sustained by these viruses. Rapid evolution may also hinder the understanding of molecular epidemiology, affect the sensitivity of diagnostic assays, limit the vaccine efficacy and favor episodes of immune escape, thus significantly complicating the control of even well-known pathogens. The history of infectious bronchitis virus (IBV) fits well with the above-mentioned scenario. Despite being known since the 1930s, it still represents one of the main causes of disease and economic losses for the poultry industry. A plethora of strategies have been developed and applied over time, with variable success, to limit its impact. However, they have rarely been evaluated objectively and on an adequate scale. Therefore, the actual advantages and disadvantages of IBV detection and control strategies, as well as their implementation, still largely depend on individual sensibility. The present manuscript aims to review the main features of IBV biology and evolution, focusing on their relevance and potential applications in terms of diagnosis and control.

scholarly journals Predicted UV-C Sensitivity of Human and Non-human Vertebrate (+) ssRNA Viruses

2021 ◽  
Author(s):  
Brahmaiah Pendyala ◽  
Ankit Patras
Keyword(s):  
Animal Health ◽  
Control Measures ◽  
Infection Prevention And Control ◽  
Infectious Bronchitis ◽  
Ssrna Virus ◽  
Pathogenic Viruses ◽  
Predicted Values ◽  
Prevention And Control Measures ◽  
And Control ◽  
Uv C

Epidemic and pandemic infectious diseases caused by RNA viruses constitute a significant hazard to human and animal health. Disinfection is an essential aspect of infection prevention and control measures. In this study, we estimated UV-C sensitivity of 83 human and veterinary pathogenic (+) ssRNA viruses by developed pyrimidine dinucleotide frequency-based genomic model. The data showed that the avian infectious bronchitis virus (genus: γ-coronavirus) with an estimated D90 value of 17.8 J/m2 was highly UV sensitive, whereas Salivirus NG-J1 (genus: salivirus) with a D90 value of 346.4 J/m2 was highly UV resistant. Overall, the trend of UV-C sensitivity of (+) ssRNA virus families followed as Coronaviridae < Flaviviridae < Togadoviridae < Arteriviridae, Matonaviridae, Astroviridae < Caciviridae < Picornaviridae < Nodaviridae < Herpeviridae. The results revealed that the enveloped viral families (Coronaviridae, Flaviviridae, Togadoviridae Arteriviridae, and Matonaviridae) are more UV-C sensitive than other non-enveloped families. Further validation of the model estimated UV sensitivity with literature available experimental data showed good agreement of predicted values. The estimates presented here could make it possible to reasonably predict UV-C disinfection efficiency of human and veterinary pathogenic viruses, which need specific biosafety requirements and/or difficult to cultivate in lab conditions.

scholarly journals Infectious bronchitis virus variants: a review of the history, current situation and control measures

2011 ◽  
Vol 40 (3) ◽  
pp. 223-235 ◽  
Author(s):  
J. J. (Sjaak) de Wit ◽  
Jane K. A. Cook ◽  
Harold M. J. F. van der Heijden
Keyword(s):  
Infectious Bronchitis Virus ◽  
Current Situation ◽  
Control Measures ◽  
Infectious Bronchitis ◽  
And Control

scholarly journals Infectious Bronchitis: A Moving Target for Commercial Poultry Industry

2021 ◽  
Vol 9 (3) ◽  
pp. 86-94
Keyword(s):  
Review Paper ◽  
High Rate ◽  
Economic Losses ◽  
Upper Respiratory Tract ◽  
Poultry Industry ◽  
Chicken Flock ◽  
Infectious Bronchitis ◽  
Commercial Poultry ◽  
Upper Respiratory ◽  
And Control

The poultry industry is one of the most efficient and flourishing sectors of agriculture that not only provides cheaper protein (eggs, meat) but also contributes heavily to the country's economy. There are several challenges faced by the poultry industry worldwide. Among all these challenges, disease management has been a major problem. Infectious bronchitis viruses (IBVs) are RNA-based viruses having high recombination and mutation rates. IBVs are gamma coronaviruses affecting the upper respiratory tract of chickens. Due to the high rate of mutation and recombination, IBVs are very difficult to properly diagnose and control. Some serotype IBVs are extremely resistant, causing high economic losses in the form of excessive use of antibiotics after the eruption of secondary pathogens and mortality, but some serotype IBVs are limited to morbidity losses only. There are some control methods for IBVs and practicing effective vaccination and biosecurity measures is highly recommended. Exposure of IBVs to chicken flock postulates gateway to secondary pathogens, which also pass on to coming generations. This review paper provides updated research tools and methods to diagnose and control IBVs.

scholarly journals The Diagnosis and Control of Infectious Bronchitis Variant Infections

1986 ◽  
pp. 103-121 ◽  
Author(s):  
F. G. Davelaar ◽  
B. Kouwenhoven ◽  
A. G. Burger
Keyword(s):  
Infectious Bronchitis ◽  
And Control

scholarly journals Avian infectious bronchitis and its management in Nepal: a review

2021 ◽  
Vol 4 (2) ◽  
pp. 211-226
Author(s):  
Chandrakala Rana ◽  
Birat Bhattarai ◽  
Khil Bahadur Rana Magar ◽  
Yuvraj Panth
Keyword(s):  
Infectious Bronchitis Virus ◽  
Egg Production ◽  
Specific Treatment ◽  
Economic Importance ◽  
Indirect Contact ◽  
Infectious Bronchitis ◽  
Inactivated Vaccines ◽  
And Control ◽  
Production Losses

Avian infectious bronchitis (IB) is a highly contagious disease of poultry with high economic importance. Caused by avian infectious bronchitis virus (IBV), it is transmitted by direct and indirect contact through aerosol or fecal means. Although IB is considered as respiratory disease, various strains of IBV affect the renal as well as the reproductive system. The economic importance of disease is due to lower egg production, poor hatchability of eggs, and decreased quality of the egg, weight loss, growth retardation, and high condemnation rates in meat-type birds. Although the prevalence of IB is lower in Nepal (>1%), it is ranked second as a disease which claims most livestock unit in the world. There is no specific treatment for IB but live and inactivated vaccines are available for the prevention and control of the virus. The lack of research in the infectious bronchitis virus can cause production losses in poultry sector due to the evolution of resistant virus strain in our country. This review discusses the aspects of avian infectious bronchitis prevalence in Nepal.

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