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| Application of 2019 Novel Coronavirus (2019-nCoV) specific antibody detection for suspected cases screening |
| GAO Hui-xia1, LI Ya-nan1, LIU Yu-zhen1, HUANG Ying1, XU Yi1, ZHANG Zhi1, GUO Yun1, LU Jian-hua1, LI Li2, WANG Yu-ling3, JIANG Ping2, DAI Er-hei1 |
1. Department of Laboratory Medicine, Fifth Hospital of Shijiazhuang, Hebei Medical University, Shijiazhuang 050021, China;
2. Department of internal medicine, Fifth Hospital of Shijiazhuang, Hebei Medical University, Shijiazhuang 050021, China;
3. Department of Tuberculosis, Fifth Hospital of Shijiazhuang, Hebei Medical University, Shijiazhuang 050021, China |
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Abstract Comparing the accuracy of antibody detection reagents which based on different principles by the diagnosis of suspected cases of new crown, propose an efficient screening plan for suspected cases, and further provide a scientific basis for establishing a clinical screening path for high-risk populations. For 76 suspected cases of COVID-19 that were transferred to designated hospitals for isolation and observation due to the initial IgM antibody test, nasopharyngeal swab nucleic acid tests, serum trace virus neutralizing antibodies and three commercially available antibody test reagents with different principles were tested, combined with lung CT and the examination and clinical symptoms or other information, comprehensively judge the diagnosis or exclusion of the new crown, and compare the three kinds of serological antibody detection reagents with the clinical judgment results to compare the detection rates of the three detection methods. Through comprehensive judgment, 3 suspected cases are confirmed cases, and 73 suspected cases are excluded cases. Compared with the clinical diagnosis/exclusion results, among the three serological antibody detection methods, the chemiluminescence total antibody kit detect positive for all the 9 serums collected from the 3 confirmed cases in different time points, the detection specificity is 97.26% for 73 excluded cases, it’s significantly higher than that of the chemiluminescence method IgM/IgG and the colloidal gold method IgM/IgG Separate testing (the specificity is 73.97% on the first day of admission). The chemiluminescence method for the detection of total antibodies to the 2019-nCoV has high sensitivity and high specificity, and can be used for preliminary screening of antibody detection in suspected cases. For the screening of target populations, the 2019-nCoV nucleic acid test should be performed first. If the nucleic acid test is negative, the screening path with the detection of serum total antibodies as the main indicator should be adopted.
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Received: 19 April 2021
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Corresponding Authors:
Jiang Ping,Email:jp918170@163.com; Dai Er-hei,Email:daieh2008@126.com
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2021, Vol. 37 
