Traces of the H5N1 bird flu virus have been detected in pasteurized milk in the United States, where the virus has been spreading widely in cattle. This discovery, announced by the US Food and Drug Administration (FDA), raises concerns about the potential for asymptomatic spread, which could make surveillance and containment efforts more challenging.
The FDA emphasizes that the milk supply remains safe, as the pasteurization process effectively kills harmful microorganisms. However, the presence of viral RNA fragments in the milk, which can be detected by PCR tests, indicates that the virus may have survived the process. While this does not necessarily mean that live virus is present, experts warn that the possibility cannot be ruled out.
The detection of H5N1 in pasteurized milk is the latest development in an outbreak that has already affected 36 dairy herds across eight US states. The virus, which has killed tens of millions of birds worldwide since 2020, has also been responsible for one human case, a dairy worker who developed conjunctivitis after close contact with infected cattle.
Experts emphasize the urgent need for transparency and information sharing from the FDA and US Department of Agriculture. They stress that detailed data and updates on investigations are crucial for maintaining public trust and facilitating a global response to this emerging threat.
The discovery of H5N1 traces in milk highlights the widespread nature of the outbreak and the potential for asymptomatic spread in cattle. Scientists are currently analyzing genetic sequences of the virus to understand its evolution and transmission patterns. This research will be vital for developing effective strategies to control and contain the outbreak.
In addition to the concerns about milk safety, the spread of H5N1 in cattle raises broader implications for food security, the economy, and human and animal health. Experts urge individuals to stay informed about the situation, follow recommended safety precautions, and support efforts to mitigate the impact of this global threat.
