First Detection of H5N1 in Minnesotan Dairy Herd

The Minnesota Department of Agriculture (MDA) has announced the detection of H5N1, commonly known as bird flu, in a Stearns County dairy herd. This marks the first instance of such detection since the initiation of the state's milk surveillance plan and also the first in a dairy herd since June 2024.

The virus was found in samples collected through the state's newly launched milk surveillance plan. Consequently, the Board of Animal Health has moved to quarantine the affected herd until further testing shows that it is no longer infected. Dr. Brian Hoefs, the state veterinarian, emphasized a collaborative approach to surveillance and response to mitigate the spread of H5N1.

While the detection raises concerns, MDA assures that the public milk supply remains safe as all commercially sold milk undergoes pasteurization, a process that eliminates bacteria and viruses. Furthermore, dairy farms are obligated to remove milk from sick animals from the supply chain.

Thom Petersen, MDA Commissioner, highlighted the importance of identifying infected herds to prevent the spread of the disease and safeguard both animal and human health. Complementary to these efforts, the Minnesota Department of Health (MDH) is supervising the health of individuals who have close contact with infected animals, providing health recommendations, and preparing measures such as testing, antivirals, and protective equipment as necessary.

MDA has also urged dairy farmers to vigilantly monitor their herds and consult veterinarians if any cows show signs of illness. Although a precautionary measure, state officials confirm that the current risk to the public from bird flu remains low.