Facebook post by University of Helsinki Julkaistu 18.08.2018 klo 08:05 University of Helsinki kirjoitti Facebookissa Contrary to earlier assumptions, the intestines of newborn calves are not sterile but contain DNA from various bacteria. Bacteria or their fragments originating in the dam may be significant to the development of the intestinal immune system. Signs of bacteria already in the bovine fetus helsinki.fi When calving was imminent, the students hurried to the cowshed to collect samples at the moment when the calf came out of the uterus.