Analysis of 8 274 cases of new coronavirus nucleic acid detection and co-infection in Wuhan

Ming Wang; Qing WU; Wanzhou XU; Bin Qiao; Jingwei Wang; Hongyun Zheng; Shupeng Jiang; Junchi Mei; Zegang WU; Yayun Deng; Fangyuan Zhou; Wei WU; Yan Zhang; Zhihua Lyu; Jingtao Huang; Xiaoqian Guo; Zhen Chen; Lina Feng; Zunen Xia; Di LI; Tiangang Liu; Pingan Zhang; Yongqing Tong; Zhiliang XU; Yan LI

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Analysis of 8 274 cases of new coronavirus nucleic acid detection and co-infection in Wuhan

VernacularTitle: 武汉地区8 274例受检者新型冠状病毒核酸检测及合并感染结果分析
Author: Ming WANG ¹ ; Qing WU ¹ ; Wanzhou XU ¹ ; Bin QIAO ¹ ; Jingwei WANG ¹ ; Hongyun ZHENG ¹ ; Shupeng JIANG ¹ ; Junchi MEI ¹ ; Zegang WU ¹ ; Yayun DENG ¹ ; Fangyuan ZHOU ¹ ; Wei WU ¹ ; Yan ZHANG ¹ ; Zhihua LYU ¹ ; Jingtao HUANG ¹ ; Xiaoqian GUO ¹ ; Zhen CHEN ¹ ; Lina FENG ¹ ; Zunen XIA ¹ ; Di LI ¹ ; Tiangang LIU ² ; Pingan ZHANG ¹ ; Yongqing TONG ¹ ; Zhiliang XU ³ ; Yan LI ¹
Author Information

1. Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan 430060, China
2. Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan 430072, China
3. Department of Paediatrics, Renmin Hospital of Wuhan University, Wuhan 430060, China
Publication Type:Journal Article
Keywords: Coronavirus; Severe acute respiratory syndrome; Reverse transcriptase polymerase chain Reaction; Virus diseases; Clinical laboratory techniques
From: Chinese Journal of Laboratory Medicine 2020;43(0):E016-E016
CountryChina
Language:Chinese
Abstract: Objective:To investigate the positive rate for 2019-nCoV tests and co-infections in Wuhan district.
Methods:A total of 8 274 cases in Wuhan were enrolled in this cross-sectional study during January 20 to February 9, 2020, and were tested for 2019-nCoV using fluorescence quantitative PCR. Both respiratory tract samples (nasopharynx, oropharynx, sputum and alveolar lavage fluid) and non-respiratory tract samples (urine, feces, anal swabs, blood and conjunctival sac swabs) were collected. If both orf1ab and N genes are positive, they are classified as nucleic acid test positive group; if both orf1ab and N genes are negative, they are classified as negative group; if single gene target is positive, they are classified as suspicious group. Individuals were divided into male group and female group according to sex. At the same time, 316 patients were tested for 13 respiratory pathogens by multiplex PCR.
Results:Among the 8 274 subjects, 2 745 (33.2%) were 2019-nCoV infected; 5 277 (63.8%) subjects showed negative results in the 2019-nCoV nucleic acid test; and 252 cases (3.05%) was not definitive (inconclusive result). The age of cases with COVID-19 patients and inconclusive cases was significantly higher than that of cases without 2019-nCoV infection (40 vs 56, t=27.569, P<0.001; 52 vs 56, t=6.774, P<0.001). The positive rate of 13 respiratory pathogens multiple tests was significantly lower in 104 subjects who were positive for 2019-nCoV compared with those in subjects who were negative for 2019-nCoV test (5.77% vs 18.39%, χ²=24.105, P=0.003). Four types of respiratory tract samples and five types of non-respiratory tract samples were found to be positive for 2019-nCoV nucleic acid test.
Conclusion:The 2019-nCoV nucleic acid positive rate in male is higher than in female. Co-infections should be pay close attention in COVID-19 patients. 2019-nCoV nucleic acid can be detected in non-respiratory tract samples.