Pasteurisation is a process used in food processing to reduce bacterial load. Some farmers that have a known Johne’s disease threat are pasteurising milk before feeding it to young calves. Is it a fool proof way of reducing Johne’s transfer?
AHI say where Johne’s disease is endemic and infection has been confirmed in a herd, pasteurisation of colostrum and milk from test-negative cows may increase the confidence that milk contains minimal Johne’s levels. However, milk from known test positive animals should not be used to feed any calf that will be retained for breeding purposes.