Accor ding to their interactions, 10 bacterial strains were classified into 6 suscepti ble groups and 20 phage strains were classified into 7 different lysogenic types .

• 根据它们相互的亲和关系，可把10个细条病菌菌株划分为6个组，把20个噬菌体划分为7个溶菌型；