156例SARS患者血清抗SARS冠状病毒抗体的观测

本研究的目的是观察严重急性呼吸综合征 (severeacuterespiratorysyndrome ,SARS)患者抗SARS 冠状病毒 (SARS CoV)抗体IgG和IgM的产生及抗体效价变化特征 ,探索采集SARS痊愈患者抗血清的时机。应用ELISA方法对随机抽取的 156名SARS患者血清标本进行抗SARS CoV抗体IgG和IgM抗体效价测定。结果表明 ,156名SARS患者于病后 3至 9周期间 ,IgG抗体阳性率为 75.6% ,IgM抗体阳性率为 41.7% ,IgG和IgM抗体均阳性为 41% ,IgG和IgM抗体均阴性为 2 3 .7% ;IgG抗体阳性患者中抗体效价为 18.2 3± 2 4.72 ,IgM抗体阴性患者抗体效价为 2 .18± 1.13 ;IgG和IgM抗体效价与SARS患者的性别、年龄、病程、体温正常天数无显著相关性。结论 :并非所有SARS患者都能产生抗SARS CoV抗体 ,即使产生抗体 ,其效价的个体差异也较大 ,并不能通过性别、年龄、病程及体温正常天数等因素较准确地评估抗体的效价。因此 ,在SARS抗血清采集前 ,应重新进行抗体效价测定 ,遴选具有高效价抗SARS CoV抗体的SARS痊愈患者进行抗血清的采集 ,才能提高所采集的抗血清在临床的治疗效果 ,同时又可为患者抗体输注提供量化指标

Detection of the Anti-SARS-Coronavirus Specific Antibody Levels in 156 SARS Patients

The objective of this study was to explore the development of IgG and IgM against SARS CoV and characteristics of changes of antibody titers in patients with severe acute respiratory syndrome (SARS) and to search the opportunity for collecting specific anti-serum from convalescent patients with SARS. The anti-SARS-coronavirus specific antibody levels in 156 SARS patients were measured with ELISA. The results showed that the total positive rates of IgG and IgM were 75.6% and 41.7% respectively, and the negative rate of both IgG and IgM was 23.7%. The average titers of IgG and IgM antibody in positive samples were 18.23 +/- 24.72 and 2.18 +/- 1.13, respectively. There was no significant correlation between the titers of IgG/IgM and sex, age, course of diseases and duration of body temperature recovery. It was concluded that not all SARS patients could produce the anti-SARS-coronavirus specific antibody. The titers of the anti-body are diversified even if the antibodies have been emerged in them. In order to obtain effective anti-serum, the titers of antibody must be tested just before collection of convalescent serum, and it ensures the therapeutic effect and provides a measurable index for clinical transfusion.