Clostridium welchii was isolated from 84.6% of the bovine samples ( 22/ 26) and 72.7% of the canine samples ( 16/ 22), but none of Bacillus anthracis were found, indicating that C. welchii is the pathogen of the bovine and canine SDS. 从84.6%病牛(22/26)、72.7%病犬(16/22)中检出魏氏梭菌(Clostridiumwelchii),但未检出炭疽杆菌,表明魏氏梭菌是牛、犬SDS的病原体。