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。

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

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 ...

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

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) ...

A new strain of bird flu has been detected in US dairy cattle, raising concerns about its potential transmission and impact ...

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

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

The new H5N1 version, known as D1.1, was found in dairy cattle in Nevada and is different than the B3.13 type that has spread ...

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 ...

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