The agency said those who tested positive were involved in higher risk activities.

The cases were the first reported in the state.

Queso fresco and cojita cheeses from a California facility proved to be contaminated.

The voluntary double-blinded study will begin in late October.

The two cases involved workers exposed to infected dairy cows.

Cases on three farms marked the first positive tests in the state.

Upon completing a second round of sampling, the FDA again deemed dairy products safe to consume.

The alliance has $100,000 in funds available to address on-farm efforts.

A Cornell University study points to the virus moving from mammal to mammal, including from cows to cats.

The state has seen spillover of the dairy strain into commercial poultry facilities.