Davidson I, Gray A K, Hebert C N, Lesslie I W
Bull World Health Organ. 1978;56(4):641-8.
The Central Veterinary Laboratory, Weybridge, England was requested by the WHO Expert Committee on Biological Standardization to obtain suitable materials for international standards for Clostridium welchii (C. perfringens) beta and epsilon toxoids and to arrange collaborative assays. Preparations were obtained and dispensed as freeze-dried toxoids in ampoules. The toxoids were assayed by nine laboratories in eight countries. On the basis of the results obtained, the materials have been established as the International Reference Preparations of Clostridium welchii (C. perfringens) Beta and Epsilon Toxoids.
世界卫生组织生物标准化专家委员会要求英国韦布里奇的中央兽医实验室获取用于产气荚膜梭菌β和ε类毒素国际标准的合适材料，并安排协作检测。已获取相关制剂并以冻干类毒素形式分装于安瓿瓶中。八个国家的九个实验室对这些类毒素进行了检测。根据所获结果，这些材料已被确立为产气荚膜梭菌β和ε类毒素的国际参考制剂。
