Testing of milk replacers for Mycobacterium avium subsp. paratuberculosis by PCR and bacterial culture as a possible source for Johne's disease (paratuberculosis) in calves

The results of the present study underpins that the use of milk replacers for calf rearing might contribute to the reduction of MAP intake by calves in JD positive herds. Additional studies, including more products with a higher diversity, are needed to further elucidate the presence or absence of MAP in milk replacers for calves.