• Bird Flu update for 02-18-2025

  • Feb 18 2025
  • Length: 3 mins
  • Podcast

Bird Flu update for 02-18-2025

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  • Summary

  • As of the last 48 hours, the bird flu situation in the US and globally continues to evolve with significant developments.

    In the United States, the bird flu outbreak remains widespread, affecting both wild birds and domestic poultry. As of February 14, 2025, the CDC has reported that 159,307,978 poultry have been affected, and 51 jurisdictions have detected bird flu in wild birds, with 11,966 wild birds identified as of February 11, 2025[1].

    Recently, a rare strain of the bird flu, H5N9, was detected on a duck farm in California, marking the first confirmed case of H5N9 in poultry in the US. This discovery, along with the more common H5N1 strain found on the same farm, has prompted comprehensive epidemiological investigations and enhanced surveillance[2].

    Another concerning development is the detection of a new strain, D1.1, in dairy cows for the first time. This strain, previously limited to wild birds and poultry, has now been found in cattle in several states, including Nevada, where it caused a human case in a dairy farm worker. The D1.1 strain is associated with more severe disease in humans, as seen in cases in British Columbia and Louisiana[3].

    The CDC has emphasized that the risk to the general public remains low, and there is currently no evidence of human-to-human transmission. However, experts are concerned about the potential for mutations that could facilitate human-to-human transmission, especially as the virus continues to circulate among animals and humans. Enhanced surveillance and testing, including for asymptomatic workers, have been recommended to monitor the situation closely[3].

    As of late January 2025, about 67 human cases of bird flu have been reported in the US, resulting in one death. The virus has been documented in birds in every state and in dairy cows in 16 states. Public health officials and infectious disease experts stress the importance of continued monitoring and updated guidance to mitigate the public health threat[4].

    Globally, while there are no recent updates within the last 48 hours, the ongoing spread of bird flu in various regions underscores the need for continuous vigilance. The virus's ability to adapt and potentially mutate raises concerns about its future impact on human health.

    In summary, the bird flu situation in the US is marked by widespread outbreaks in poultry and wild birds, the emergence of new strains, and concerns about potential mutations. While the current public health risk is considered low, ongoing surveillance and public health measures are crucial to managing this evolving situation.
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