目的 实验室确认静注巨细胞病毒人免疫球蛋白（pH4）（human cytomegalovirus immunoglobulin for intravenous injection，CMV-IVIG）抑制巨细胞病毒（cytomegalovirus，CMV）感染的有效性。方法 分别通过免疫荧光染色和细胞病变实验测定CMV-IVIG抑制CMV的即早基因1表达和致细胞病变能力，确认CMV-IVIG有效性。结果 即早基因1表达量与病变细胞数量随着制品稀释倍数的增加而增加；27倍稀释的CMV-IVIG可抑制90.77%~95.85%的CMV感染力；103倍稀释的CMV-IVIG可抑制>90%的细胞病变。结论 CMV-IVIG中的中和抗体能特异性中和CMV，阻止CMV感染细胞，且具有良好的量效关系。

objective  To confirm the efficacy of human cytomegalovirus immunoglobulin for intravenous injection (CMV-IVIG) against cytomegalovirus (CMV) in laboratory. Methods  The effectiveness of CMV-IVIG was confirmed by measuring the ability to inhibit the expression of immediate early gene (IE) 1 of CMV and cytopathic changes using immunofluorescence and cytopathic effect tests, respectively. Results  The expression of IE1 and the number of diseased cells increased with the increase of dilution ratio, with 27 times diluted CMV-IVIG inhibiting 90.77%-95.85% CMV infection and 103 times diluted CMV-IVIG inhibiting >90% cytopathic effect. Conclusion  The CMV specific neutralizing antibody in CMV-IVIG can neutralize CMV and stop the cell infection with good dose-response relationship.