Show Pron tylin Pron tylin the magic drug that has startled the medical world by quickly eliminating streptococcus infections in mark mai is now being tested with cows to clear up udder infections with mastitis and encouraging results are being secured dr lowell erf of cincinati cincinnati suggested the idea to his lather father prof oscar erf of ohio state university who is now testing it on more than cows some cows where the mastitis is due to streptococcus infection have later been reported negative farm journal |