WASHINGTON — The federal government will provide livestock farms as much as $28,000 apiece to bolster protective measures and testing for the avian flu virus spreading among dairy cows, officials said Friday.

The Agriculture Department also allotted $98 million to aid states restricting the interstate movement of affected cattle, and health officials announced they would put an additional $101 million toward expanded surveillance, tests, treatments, and vaccines for the virus, which has now spread to at least 40 farms in nine states, with one confirmed human transmission.