Lansing, Michigan – A highly contagious strain of bird flu that was initially detected in dairy cows in Texas and Kansas earlier this week has now spread to additional herds, reaching a total of five affected states. This development has raised concerns about the potential spread of the virus from cow to cow. The virus has been confirmed in Michigan, with presumptive positive tests also reported in Idaho and New Mexico, according to federal officials on Friday.
The presence of the highly pathogenic avian influenza, known as HPAI, was confirmed in a Michigan dairy herd that recently received cows from Texas. This information was disclosed in a statement released by the USDA on Friday. The virus strain found in Michigan is similar to the strain discovered in Texas and Kansas, indicating a possible introduction through wild birds, as stated by the USDA.
Officials are closely monitoring the situation, advising veterinarians and producers to implement strict biosecurity measures, conduct testing on animals that need to be relocated, minimize animal movements, and isolate sick cattle. There is ongoing investigation by the USDA, FDA, and CDC into the illness affecting dairy cows, which has resulted in decreased milk production, loss of appetite, and other symptoms.
In Idaho, avian flu was detected at a dairy cattle farm in Cassia County, following the importation of livestock from another state where HPAI was identified in cows. State veterinarian Scott Leibsle highlighted the role of cow-to-cow transmission in the disease’s progression, emphasizing the need for further understanding in this area.
While most infected animals have recovered after isolation and minimal cattle deaths have been reported, some dairy producers in Idaho may opt to send affected animals to slaughter as beef animals. The USDA has clarified that there is no concern regarding the safety of the commercial milk supply, as products undergo pasteurization before entering the market.
Health officials stress the importance of avoiding raw or unpasteurized milk due to potential health risks associated with consuming dairy products from cows showing symptoms of illness or infection with avian influenza. The FDA recommends against the manufacture or sale of raw milk or unpasteurized cheese products made from animals exposed to the virus.