Cattle from dairy herds in Idaho, Kansas, Michigan, New Mexico and Texas have either exhibited symptoms associated with highly pathogenic avian influenza (HPAI) or received presumptive positive test results, according to the US Department of Agriculture’s National Veterinary Services Laboratories (NVSL). The agency also confirmed the strain identified in Michigan is similar to the strain confirmed in Texas and Kansas that may have been introduced by wild birds.
Dairy cattle infected with HPAI suffer a loss of production, but the USDA said milk loss resulting from symptomatic cattle to date is too limited to have an impact on supply. Infected cattle also have recovered after isolation with no associated mortality reported.
There continues to be no concerns about the safety of the commercial milk supply and there is not a risk to consumer health, according to the USDA. The Food and Drug Administration, however, recommended dairy processors should not manufacture or sell raw milk or raw/unpasteurized milk cheese products made with milk from cows showing symptoms of illness. The FDA also said it is not aware of any milk or food product from symptomatic cows entering the consumer market.
