A dose of 0.6ml,2ml and 4ml of the vaccine protected mice, rabbits and pigs respectively against challenge of 1 MLD of toxin of the type culture of C. welchii type A.

• 疫苗0.；6ml、2ml和4ml的剂量可以分别保护小鼠、兔和猪抵抗标准A型魏氏梭状芽孢杆菌毒素1MLD的攻击。