A new strain of bird flu, designated D1.1, has been detected in U.S. dairy cows for the first time, according to an announcement made by the U.S. Department of Agriculture (USDA) on Wednesday.
Previously, all cases of bird flu in U.S. dairy herds were associated with a different strain known as B3.13.
The emergence of D1.1 in cattle, specifically identified in dairy cows in Nevada, marks a significant spillover event since this strain has primarily been found in wild birds and poultry.
The detection was made as part of the USDA’s national milk testing program, which began in early December.
In their statement, the USDA’s Animal and Plant Health Inspection Service (APHIS) confirmed their collaboration with the Nevada Department of Agriculture to carry out additional investigations and testing on farms. […]
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