在营养琼脂培养基平板上，它们所形成的噬菌斑形状各不相同，噬菌体HPA1所形成的噬菌斑大小中等且透明；
The morphologies of their plaques are different in nutrient agar medium. The plaque's size of HPA1 is medium and transparent.
方法：采用鸡蛋斜面培养基，亚碲酸钾血琼脂平板和肉汤培养基观察其生长特性、测定多种生化反应性、毒力和药物敏感性。
Methods: To observe the cultural characteristics with the medium of inclined plane of egg, AGAR plate with blood and potassium tellurite, and broth.
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