通过观察细胞病变效应，用噻唑蓝(MTT)比色法检测细胞存活率，以确定该药物治疗指数。

By means of observing cytopathic effect and adopting MTT colorimetric assay for cell survival rate, their therapeutic index was calculated.

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方法：通过观察药物毒性、病毒引起的细胞病变效应、MTT法检测细胞活性，判断药物毒性及药物抗病毒效应。

Methods: The toxic and antiviral effect was evaluated by observing toxic effect, cytopathic effect (CPE) and MTT colorimetric assay for vital cell rate.

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