The popular Vermont cheese maker first began operating in 1824.

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

The federal agency also looked to shine light upon "milk myths."

Direct exposure to dairy cattle likely led to an infection.

FDA recommended not manufacturing or selling raw milk or raw/unpasteurized milk cheese products made with milk from cows showing symptoms.

WCMA executive director John Umhoefer addresses the debate over raw milk sales.