MINNEAPOLIS (AP) -- The detection of a highly pathogenic strain of bird flu at a
Tennessee chicken farm has Midwest poultry farmers tightening procedures in an
attempt to prevent an outbreak like the one in 2015 that required the
destruction of millions of birds and cost at least $3 billion.

Milder forms of bird flu have also been found in Wisconsin and at another farm
in Tennessee, though no further cases have been reported in the U.S. so far.

The U.S. Department of Agriculture announced Sunday that a highly pathogenic
form of bird flu was confirmed at a Tennessee chicken farm that supplies Tyson
Foods. Officials quickly moved to kill the entire flock to prevent the virus
from spreading.

Producers have stepped up biosecurity in response.