Results: (1) The cytopathic effect (CPE) was observed in U251 cells at 3 days after HCMV infection. Apoptosis was observed in U251 cells infected with HCMV under electromicroscopy.

• 结果：(1)形态学观察显示HCMV感染U251细胞后出现细胞病变效应(CPE)，电镜观察有部分HCMV感染的U251细胞超微结构呈现凋亡形态学改变。