美国农业部说，对来自内华达州的牛奶进行的基因组测序发现了与之前不同的毒株，被称为D1.1基因型，这是在奶牛中首次发现该毒株。据农业部说，在这之前，自3月末以来报告的所有957例奶牛感染禽流感病例都是由另一个毒株--B3.13基因群造成的。

A second type of bird flu has been found in U.S. dairy cows for the first time, the U.S. Department of Agriculture (USDA) ...

The U.S. Department of Agriculture has detected a bird flu strain in dairy cattle that previously had not been seen in cows, ...

A variant of the H5N1 bird flu has now infected dairy cattle in Nevada, according to reports from the United States ...

Dairy cows in Nevada have been infected with a new strain of bird flu, marking the second strain detected in herds since ...

U.S. dairy cattle tested positive for a strain of bird flu that previously had not been seen in cows, the U.S. Department of ...

The detection indicates that distinct forms of the virus known as Type A H5N1 have spilled over from wild birds into cattle ...

At least four cattle herds in Nevada have tested positive for a strain of H5N1 bird flu never before seen in cows, state ...

A more dangerous strain of H5N1 bird flu has been detected in cattle for the first time, the US Department of Agriculture ...

Six dairy herds in Nevada have tested positive for a newer strain of the H5N1 bird flu virus that’s been associated with ...

A version of the avian influenza virus different from the one rampaging through herds since last spring has been detected in ...

A new type of bird flu has been detected in dairy cattle in Nevada, according to the USDA. The strain is different from the ...