An Arthrobacter gandavensis strain having an activity against Clostridium perfringens selected from the strains AP1 filed with DSMZ on Feb. 19, 2014 under the number DSM 28444, AP2 filed with DSMZ on Feb. 19, 2014 under the number DSM 28445, AP3 filed with DSMZ on Feb. 19, 2014 under the number DSM 28446 or AP4 filed with DSMZ on Feb. 19, 2014 under the number DSM 28447.