In each case, the infecting organism USES the host body to live and grow, and is often restricted to a particular organ.
每一种情况中，感染生物都用寄主的身体来生存和生长，经常集中于一个特定器官。
It is indicated for the treatment of infection before the infecting organism has been identified or when caused by sensitive bacteria.
在感染的细菌未被确认出来，或由敏感细菌引起感染时，适于用它来治疗。
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