Understanding animal health threats from emerging H5 high pathogenicity avian influenza viruses
Lead Research Organisation:
The Pirbright Institute
Department Name: Avian Influenza
Abstract
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Technical Summary
The UK poultry industry is experiencing severe socio-economic damage and threats from high pathogenicity avian influenza viruses (HPAIVs) H5Nx of clade 2.3.4.4. These viruses pose zoonotic infections risks. The rapid evolution of these viruses is modulating their biological behaviour (epidemiology, host-range, transmission, and pathogenesis) in different avian species. To determine potential risks and improve controls against these emerging and re-emerging viruses requires a comprehensive knowledge base about the nature of prevailing viruses, and an integrated cross-disciplinary approach to studying virus ecology and epidemiology based on understanding virus/host interactions, and the genetic determinants of virulence, transmissibility and antigenicity in wild birds/poultry.
This project will investigate how contemporary H5Nx HPAIVs acquire adaptive changes to increase fitness within domestic and wild avian populations. We will define viral and host factors that potentially contribute to increased transmissibility, persistence, and pathogenicity in wild birds and those that enhance their potential to disseminate and manifest disease in poultry. Evolutionary changes drive virological, immunological and zoonotic infection potential of these viruses therefore, our understanding of environmental and molecular correlates required or associated with successful evolution, immune escape, dissemination and maintenance of HPAIVs via migratory populations of wild birds will be developed. Furthermore, we will define molecular markers for successful interspecies transmission and fitness in poultry with severe clinical outcomes. The will provide insights for assessing threats from new and emerging strains, enabling national and international agencies to design and execute contingencies as part of risk mitigation and disease control. This will provide vital information when considering how to invest scarce resources for surveillance design aimed at early warning of the threat.
This project will investigate how contemporary H5Nx HPAIVs acquire adaptive changes to increase fitness within domestic and wild avian populations. We will define viral and host factors that potentially contribute to increased transmissibility, persistence, and pathogenicity in wild birds and those that enhance their potential to disseminate and manifest disease in poultry. Evolutionary changes drive virological, immunological and zoonotic infection potential of these viruses therefore, our understanding of environmental and molecular correlates required or associated with successful evolution, immune escape, dissemination and maintenance of HPAIVs via migratory populations of wild birds will be developed. Furthermore, we will define molecular markers for successful interspecies transmission and fitness in poultry with severe clinical outcomes. The will provide insights for assessing threats from new and emerging strains, enabling national and international agencies to design and execute contingencies as part of risk mitigation and disease control. This will provide vital information when considering how to invest scarce resources for surveillance design aimed at early warning of the threat.
Publications
Chang P
(2023)
Risk assessment of the newly emerged H7N9 avian influenza viruses.
in Emerging microbes & infections
Chang P
(2023)
Characterization of the haemagglutinin properties of the H5N1 avian influenza virus that caused human infections in Cambodia
in Emerging Microbes & Infections
| Description | 1: Analysed the role of antigenic factors in the emergence of novel H5N1 high pathogenicity avian influenza viruses (HPAIVs). The results demonstrated that the novel H5N1 HPAIVs infecting wild birds and poultry in the UK and UK are antigenically distinct and carry relatively high antigenic homology with the HPAIVs H5NX viruses of clade 2.3.4.4B but not with other HPAIVs H5NX viruses belonging to clade 2.3.4.4A, or C-H). For example, the H5N6 HPAIVs viruses that are infecting poultry in China and Vietnam are antigenically different from the H5N1 infecting poultry in the UK. Thus, the vaccines being used in China against H5N6 (clade 2.3.4.4H) will not protect poultry from the HPAIVs H5N1 viruses infecting poultry in the UK and Europe. 2: Defined viral factors that contribute to pathogenicity and disease emergence. Because HPAIVs H5N1 virus currently circulating in wild birds and poultry also pose risk to cause zoonotic infections. Thus, we examined the potential risk of these viruses to humans. Our results showed that the current (2012-2023) viruses infecting wild birds and poultry in the UK and Europe have no binding affinity for human-like cell receptors. Thus, possess very little or no risk of zoonotic transmission from infected birds to humans. |
| Exploitation Route | Initial data from this project will pave the way for the establishment of a more comprehensive research programme developing disease control tools that allow reducing the impact of these viruses on poultry and humans. |
| Sectors | Agriculture, Food and Drink,Education,Healthcare,Manufacturing, including Industrial Biotechology,Pharmaceuticals and Medical Biotechnology |
| Description | The fining of this project has been used for: 1: Establishment of risk assessments e.g. potential threats from these viruses to wild birds, poultry, and mammalian species including humans. 2. Development and evaluation of vaccines for poultry. |
| First Year Of Impact | 2022 |
| Sector | Agriculture, Food and Drink,Creative Economy,Education,Healthcare,Manufacturing, including Industrial Biotechology,Pharmaceuticals and Medical Biotechnology |
| Impact Types | Cultural,Societal,Economic,Policy & public services |
| Description | Evaluate the potential of AstraZeneca's sialic acid tag technology for treating influenza viruses with Fc molecules |
| Organisation | Liverpool School of Tropical Medicine |
| Department | Parasite Immunology Liverpool |
| Country | United Kingdom |
| Sector | Public |
| PI Contribution | Established partnership to investigate the antiviral properties of novel antiviral ( fragment-crystallisable (Fc) molecules) compounds that potentially block influenza virus infection. These compounds will be used to test their antiviral activity against avian influenza and Newcastle Disease virus that are causing sever economic looses to the poultry industry. |
| Collaborator Contribution | The Partners have developed these antiviral compounds and showed that these compounds bids to specific cell surface receptors that are required by the virus to bind to and enter into the cell to cause infection. |
| Impact | Project is just started |
| Start Year | 2022 |
| Description | PARTNERSHIP: Nanoparticle Vaccines Against Emerging Poultry Infections |
| Organisation | University of Wisconsin-Madison |
| Department | Department of Pathobiological Sciences |
| Country | United States |
| Sector | Academic/University |
| PI Contribution | We established a joint project with School of Veterinary Medicine, University of Wisconsin, Madison, USA. My team will contribute in the development of Novel Target antigen delivery vaccines that selectively delivers antigens to the chicken immune cells and induces faster and stronger immune responses in vaccinated chickens. |
| Collaborator Contribution | The partner developed a novel DNA nano-vaccine platform. This partnership will merge both technologies to enhance both the potency and delivery systems for poultry vaccines. |
| Impact | The partnership submitted a joint research grant proposal to USDA-NIFA-AFRI (Program A1181 Agricultural Biosecurity) entitled "Partnership: Nanoparticle Vaccines Against Emerging Poultry Infections". This grant proposal has been approved by the funders. |
| Start Year | 2022 |
| Description | Understanding animal health threats from emerging H5 high pathogenicity avian influenza viruses |
| Organisation | Animal and Plant Health Agency |
| Country | United Kingdom |
| Sector | Public |
| PI Contribution | This is a collaborative research project funded by the UKRI-BBSRC to understand how the high pathogenicity Avian Influenza virus (H5N1) persisting in different species of wild birds and transmits from wild birds to farmed poultry, the gaps in biosecurity that allow the virus to penetrate premises, and how this could be addressed. My team contributing by by generating research reagents (such as viruses generated using reverse genetic technique) that allows the identification of molecular markers in the virus genes responsible for virus virulence, transmission and/or antigenic change. The data generated helped the partners to utilise the viruses and reagents for testing their biological behaviors ( such as infectivity and transmission parameters) via animal infection studies. The outcome of this collaborative work will provide insights for assessing threats from new and emerging strains, enabling national and international agencies to design and execute contingencies as part of risk mitigation and disease control. This will provide vital information when considering how to invest scarce resources for surveillance design aimed at early warning of the threat. |
| Collaborator Contribution | The collaboration enhance both the capacity of my team by providing field data ( such as sequences of viruses isolated from the field) and reagents such as post-infection antiserum containing antibodies specific to the field virus. This allowed the investigation of field virus antigenic profiles that can be used for selection of candidate vaccine seeds for the production of effective vaccines. |
| Impact | The data generated provided a risk assessment of contemporary H5Nx HPAIVs that are acquiring adaptive changes to increase fitness within domestic and wild avian populations. This partnership identified viral and host factors that potentially contribute to increased transmissibility, persistence, and pathogenicity in wild birds and those that enhance their potential to disseminate and manifest disease in poultry. We identified genetic changes that drive the virological, immunological, and zoonotic infection potential of these H5N1 viruses. The data generated allowed us an establishment of current and future risks from these viruses to both animals and humans if they continue to remain prevalent in wild bird populations. |
| Start Year | 2022 |
| Description | Avian flu: our food chain is in crisis. |
| Form Of Engagement Activity | A press release, press conference or response to a media enquiry/interview |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Media (as a channel to the public) |
| Results and Impact | The New paper "Telegraph" correspondent Sarah Newey (GLOBAL HEALTH SECURITY CORRESPONDENT) Interviewed Professor munir Iqbal regarding the impacts and threats of current wave if high pathogenicity avian influenza virus causing disease widespread losses to poultry production, mortality of wild birds and mammalian species (otters, foxes, minks sealions), The discussion focus on the impacts of avian influenza infections on the livelihood of farming comunities and threat of zoonotic infection to wider public. |
| Year(s) Of Engagement Activity | 2023 |
| URL | https://www.telegraph.co.uk/global-health/science-and-disease/what-bird-flu-pandemic-killedmillions-... |
| Description | Bird flu: What is it and what's behind the outbreak? ( BBC New) |
| Form Of Engagement Activity | A broadcast e.g. TV/radio/film/podcast (other than news/press) |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Media (as a channel to the public) |
| Results and Impact | Discussion with BBC News Editors (Helen Briggs & Jeremy Howell). As the The world is going through its worst-ever outbreak of bird flu which led the deaths of hundreds of thousands of wild birds and millions of domestic ones. It is also being found in mammals, so what are the threats from this virus to economy, food security, animal welfare and public health. |
| Year(s) Of Engagement Activity | 2023 |
| URL | https://www.bbc.co.uk/news/science-environment-63464065 |
| Description | Controlling and monitoring Avian Influenza in poultry |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Industry/Business |
| Results and Impact | Engagement with veterinarian and farmers involved in poultry production. The discussion focused was new strategies (vaccines and diagnostics) for reducing the the impacts of high pathogenicity of avian influenza viruses. |
| Year(s) Of Engagement Activity | 2023 |
| Description | Could Bird Flu become a pandemic? (Aljazeera TV) |
| Form Of Engagement Activity | A broadcast e.g. TV/radio/film/podcast (other than news/press) |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Media (as a channel to the public) |
| Results and Impact | The discussion ( Inside Story) has been impacts of high pathogenicity avian influenza on poultry and whether bird flu become a pandemic?. The inside story was presented by Al Jazeera English corresponded "Mohammed Jamjoom" the discussion focus remains as the world is experiencing its largest recorded outbreak of bird flu, populations of poultry and wild birds are becoming infected. So what are threats of these viruses on food supplies, economy and public health. |
| Year(s) Of Engagement Activity | 2023 |
| URL | https://www.youtube.com/watch?v=spp2Cg-jqoc |
| Description | Developing novel multivalent vaccines for poultry viral diseases |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | National |
| Primary Audience | Postgraduate students |
| Results and Impact | A talk entitled "Developing novel multivalent vaccines for poultry viral diseases" was presented to post-graduate students from Univerity of Oxford. |
| Year(s) Of Engagement Activity | 2022 |
| Description | Improving Breadth and Duration of Immunity of Poultry Vaccines: Targeted Delivery of Antigens to Chicken Antigen Presenting Cells. |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | Regional |
| Primary Audience | Postgraduate students |
| Results and Impact | Talk entitled "Improving Breadth and Duration of Immunity of Poultry Vaccines: Targeted Delivery of Antigens to Chicken Antigen Presenting Cells" presented by Professor Iqbal at 2022 Yangzhou International Conference on Agriculture and Agri-Product Safety - Germplasm Innovation and Agri-Product Safety on 30th November 2022. |
| Year(s) Of Engagement Activity | 2022 |
| Description | Improving Potency of Poultry Vaccines |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | Regional |
| Primary Audience | Postgraduate students |
| Results and Impact | A talk entitled "Improving Potency of Poultry Vaccines" presented by Munir Iqbal to post graduate students at meeting "The 2022 International Animal Husbandry High-Quality Development Conference" on On 19th November 2022 hosted by Shandong Vocational Animal Science and Veterinary College. More than 300 post graduate and university staff from Shandong Vocational Animal Science and Veterinary College attended the meeting and discussed the advanced in the strategies to reduce the impacts of avian influenza viruses. |
| Year(s) Of Engagement Activity | 2022 |
| Description | Improving Potency of Poultry Vaccines |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Postgraduate students |
| Results and Impact | Research outcomes were presented by Munir iqbal at the 2022 International Animal Husbandry: High quality development of animal health and animal husbandry- Virtual Scientific Conference, on 19-Nov-2022, hosted by Shandong Vocational Animal Science and Veterinary College. |
| Year(s) Of Engagement Activity | 2022 |
| Description | New rapid protection bird flu vaccine |
| Form Of Engagement Activity | A magazine, newsletter or online publication |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Media (as a channel to the public) |
| Results and Impact | Article published in the magazine "Poultry World) by Freelance journalist Natalie Berkhout describing the development of a new methods have been developed to enhance the immune response that vaccines produce and reduce the amount of virus that birds shed into the environment. One technique involves tagging flu virus proteins with a marker that makes them easier for antigen-presenting cells (APCs) to capture. These immune cells can efficiently process the tagged proteins, resulting in a robust and long-lasting antiviral response in chickens. |
| Year(s) Of Engagement Activity | 2022 |
| URL | https://www.poultryworld.net/health-nutrition/health/new-rapid-protection-bird-flu-vaccine/ |
| Description | Targeted Antigen Delivery Vaccines: Next Generation Vaccines for Poultry |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | National |
| Primary Audience | Policymakers/politicians |
| Results and Impact | A talk entitled "Targeted Antigen Delivery Vaccines: Next Generation Vaccines for Poultry" presented to the Executive Chair of the Biotechnology and Biological Sciences Research Council. The discussion aim was the advances approaches that can increases the strength and breath of vaccine immunity in animals and humans. |
| Year(s) Of Engagement Activity | 2022 |
| Description | Time for rethink on farming poultry as experts warn bird flu has slipped 'through our fingers (Sky News) |
| Form Of Engagement Activity | A broadcast e.g. TV/radio/film/podcast (other than news/press) |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Media (as a channel to the public) |
| Results and Impact | Discussion with Sky New UK corresponded Tom Clarke (Science and technology editor @aTomClarke) on continued avian influenza viruses are becoming endemic in bird populations in Europe and North America with some areas seeing a 600% increase in infection over the past few months in September -November 2022. In the UK, every day now, two or three new premises have been testing positive for bird flu. If they do, their flocks are culled and over 50 million birds culled in Europe this year and a similar number in North America. There is a need for an improved disease control strategies against these viruses. just culling of infected and at risk will not reduce viruses prevalence and spread, because virus in circulating in wild birds. |
| Year(s) Of Engagement Activity | 2022 |
| URL | https://news.sky.com/story/time-for-rethink-on-farming-poultry-as-experts-warn-bird-flu-has-slipped-... |
| Description | Why wet markets will never close - despite the global threat to human health (The Telegraph) |
| Form Of Engagement Activity | A press release, press conference or response to a media enquiry/interview |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Media (as a channel to the public) |
| Results and Impact | This discussion was due to current enormous global spread of bird flu and widespread poultry outbreak has generated unprecedented opportunities for the virus to jump to humans and potentially even mutate to better spread between people. Since the Live bird markets have been identified as key factors in the spread, persistence and evolution of avian influenza viruses,. Therefore, there is an increased risk to public at the live birds markets and how these risks can be reduced to increase food safety, security and public health. |
| Year(s) Of Engagement Activity | 2023 |
| URL | https://www.telegraph.co.uk/global-health/science-and-disease/why-wet-markets-will-never-close-despi... |