Bird Flu Pandemic: Understanding the Risks and Preparing for a Possible Incursion in Australia

Strategic Insights -

As the world grapples with a devastating bird flu pandemic, a particular strain of highly pathogenic avian influenza (HPAI) virus called H5N1 clade 2.3.4.4b is spreading globally, affecting wild birds and poultry on every continent except Australia. Meanwhile, three separate strains of bird flu - H7N3, H7N9, and H7N8 - have been detected in Australia, prompting concerns about the risk of a possible incursion of H5N1. Dr. Frank Wong, a senior research scientist at the Australian Centre for Disease Preparedness (ACDP), sheds light on the current situation and the efforts being made to contain and prevent the spread of the virus.

Key Takeaways:

  • The H5N1 clade 2.3.4.4b strain has spread globally, affecting millions of wild birds and domestic poultry, and has even killed wild birds and marine mammals in Antarctica.
  • Australia has experienced outbreaks of low pathogenic avian influenza (LPAI) in the past, but not H5N1; however, three separate strains of bird flu (H7N3, H7N9, and H7N8) have been detected in the country.
  • The risk of H5N1 reaching Australia is relatively low due to the country's geographical location outside of migratory bird flyways, but the risk has increased due to the virus's ability to infect additional species of wild birds.
  • CSIRO's Australian Centre for Disease Preparedness (ACDP) is playing a crucial role in testing, determining virus strains, and providing advice to authorities to support response efforts.
  • The ACDP conducts research to characterize the virus, assist with surveillance efforts, and provide diagnostic capabilities and response advice.
  • The H5N1 strain has picked up the ability to infect a wider variety of bird species and has mixed with local bird flu strains, allowing it to adapt to new environments and infect many new bird species.

Statistics:

  • The H5N1 clade 2.3.4.4b strain has spread to every continent except Australia, affecting millions of wild birds and domestic poultry.
  • There have been previous outbreaks of HPAI in Australia in 2012, 2013, and 2020.
  • The HPAI outbreaks in Australia's current outbreaks are caused by H7N3, H7N9, and H7N8 strains.
  • The H5N1 strain has infected wild birds and marine mammals, including sea lions, elephant seals, and cats, as well as farmed minks and dairy cows in Europe and the USA.

Sources:

  • Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia.
  • Dr. Frank Wong, senior research scientist at the Australian Centre for Disease Preparedness (ACDP).
  • World Organisation for Animal Health (WOAH).
  • CSIRO's Australian Centre for Disease Preparedness (ACDP).