密切接触严重急性呼吸综合征患者的医务人员血清抗体检测和分析

目的　研究与严重急性呼吸综合征 (SARS)患者密切接触的医务人员的血清抗新型冠状病毒抗体水平。方法　采用酶联免疫吸附测定 (ELISA)法检测与SARS患者有密切接触的医务人员 ( 64名 )、健康对照者 ( 4 97名 )、社区获得性肺炎患者 ( 119例 )及SARS康复者 ( 4 6例 )血清特异性IgG抗体滴度。抗体滴度用吸光度 (A)的常用对数值 (lg)表示。结果　SARS康复者血清特异性IgG抗体滴度为 0 0 7± 0 13 ,显著地高于其他 3组。医护人员组IgG抗体滴度为 -1 18± 0 2 0 ,显著地高于社区获得性肺炎组及健康对照组。在健康对照组中 ,2 0 0 3年 5月在北京取血样 ( 163份 )的血清IgG抗体滴度为 -1 61± 0 13 ,显著地高于SARS发病以前的 2 0 0 1年的北京血样 ( 180份 )抗体滴度 -1 76±0 2 5和 2 0 0 3年 5月非疫区的山东血样 ( 154份 )的抗体滴度 -1 95± 0 44。在社区获得性肺炎 ( 119例 )中 ,细菌性肺炎 ( 90例 )的抗体滴度为 -1 99± 0 3 1,与传统非典型肺炎抗体滴度 -2 0 5± 0 2 3比较差异无显著性。结论　与SARS患者密切接触者血清特异性抗体水平升高 ,其意义有待于进一步研究

The quantitative detection of anti-coronavirus antibody titer in medical personnel closely contacted with severe acute respiratory syndrome patients

OBJECTIVE: To study the serum anti-coronavirus antibody titer in medical personnel who had closely contacted with severe acute respiratory syndrome (SARS) patients. METHODS: The serum anti-coronavirus IgG antibody titer in medical personnel who had closely contacted with SARS patients, healthy individuals, patients with community acquired pneumonia and patients recovered from SARS was detected by using an enzyme-linked immunosorbent assay (ELISA) method. The antibody titer was expressed as the value of absorbency (A) with common logarithm conversion. RESULTS: The serum anti-coronavirus IgG antibody titer in patients recovered from SARS was 0.07 +/- 0.13, which was significantly higher as compared with those in other groups. The antibody titer in medical personnel was -1.18 +/- 0.20, which was also significantly higher as compared with those in community acquired pneumonia patients and healthy persons. In the healthy persons, the antibody titer of serum samples obtained from Beijing in May, 2003 was -1.61 +/- 0.13, which was significantly higher than that of samples obtained from Beijing in 2001 when SARS was not found -1.76 +/- 0.25 and that of samples from Shandong province where SARS was not found in May, 2003 -1.95 +/- 0.44. There was no significant difference in the antibody titer between patients of bacterial pneumonia and patients of atypical pneumonia, which was -1.99 +/- 0.31 and -2.05 +/- 0.23 respectively. CONCLUSION: Close contact with SARS patients can cause the serum anti-coronavirus antibody titer to increase significantly in medical personnel, a phenomenon deserves further study.