In a significant and unprecedented discovery, bird flu (H5N1) has been detected in a sheep in Yorkshire, England. This marks the first known case of the virus in sheep globally, raising concerns about the spread of avian influenza among mammals. Experts, however, reassure that the risk to human health remains very low.
The discovery came after routine surveillance on a farm where bird flu had previously been detected in captive birds. While the infected sheep was culled, further testing of the flock revealed no additional cases, and biosecurity measures were swiftly put in place.
Biosecurity Measures Enacted to Limit Spread
According to the UK government, strict biosecurity protocols have been immediately implemented to prevent further transmission of the disease.
The single infected sheep, a ewe, showed signs of mastitis, but otherwise, no other clinical symptoms were present. Following the culling of the infected animal, extensive testing of the remaining flock confirmed that no other sheep had contracted the virus.
Christine Middlemiss, the UK’s chief veterinary officer, called for heightened vigilance from livestock owners. She urged them to maintain “scrupulous cleanliness” and report any signs of infection to the Animal and Plant Health Agency. While the risk to livestock remains low, these measures are essential in ensuring the virus does not spread further.
The detection in Yorkshire is particularly notable because it follows a trend of increasing mammal infections worldwide. H5N1 has previously been found in a variety of mammals, including dairy cows in the United States. As the virus spreads across different species, experts are closely monitoring its potential to mutate.
Bird flu : Low Risk to Humans and Continued Monitoring
Despite the detection of bird flu in a sheep, authorities continue to reassure the public that the risk to human health remains minimal.
Dr. Meera Chand, from the UK Health Security Agency (UKHSA), noted that while mammals can become infected with avian influenza, the virus does not easily spread to humans. There have been isolated human cases, but these were typically among individuals with prolonged contact with infected birds.
The UKHSA has closely monitored the situation since the January case of bird flu in a farm worker, which was linked to prolonged exposure to infected poultry.
However, the risk of a pandemic remains low, as there is no evidence of human-to-human transmission of the virus. UK authorities, in collaboration with health agencies, are prepared to respond swiftly if a human case is detected.
