Performance evaluation of six coronavirus nucleic acid detection reagents and matching analysis with nucleic acid extraction reagents

Objective: To select nucleic acid extraction reagents and amplification reagents by comparing the minimum detection limit, amplification efficiency, specificity, accuracy, and matching analysis with 6 nucleic acid extraction reagents of 6 novel coronavirus (2019-nCoV) nucleic acid detection reagents and provide scientific basis for clinical diagnosis and treatment. Methods: The national-standard material of 2019-nCoV nuclear acids was diluted as ths six fradient concentrations. Then, the diluted samples were analyzed by using the six kinds of agents/kits, Guangzhou Daan (DA), Beijing Jinhao (JH), Wuhan Mingde (MD), Sichuan Mike (MK), Jiangsu Shuoshi (SS) and Shanghai Zhijiang (ZJ). The minimum detection limit, amplification efficiency, accuracy, specificity and other properties of these kits were examined. The positive control levels 1, 2 (low and medium concentration) were extracted by using the six nucleic acid extraction reagents (numbered a-f) with six 2019-nCoV detective kits to detect target genes of 2019-nCoV genome, and compared between different nucleic acid extraction reagents and different nucleic acid detection reagents. Match between the different nucleic acid extraction reagents detection reagents, using two-way analysis of variance. Results: The minimum detection limit of Nucleocapsid (N) gene of DA, JH, MD, SS reagent was 7.0×102 copies/ml.The minimum detection limit of open reading frame 1ab (ORF1ab) gene of JH, MD, SS, MK reagent was 9.39 ×102 copies/ml.The minimum detection limit of envelope (E) gene of MK, ZJ reagent was 5.03×102 copies/ml. SS reagent N gene amplification efficiency was 89%, ORF1ab gene amplification efficiency was 90%, was the highest among six reagents.a, b, c, d extraction reagents and 6 nucleic acid detection reagents match well, But a extraction reagent was more suitable for use with SS,MK and ZJ reagents (P<0.05), d extraction reagent was more suitable for MD,SS,DA,JH and MK nucleic acid detection reagents(P<0.05);e extraction reagent was more suitable for SS nucleic acid detection reagents(P<0.05), f extraction reagent was most suitable for DA, JH Nucleic acid detection reagents (P<0.05);e and f reagents were not suitable for use with MK and ZJ. Conclusion: The 6 detection reagents have good performance, and the appropriate extraction reagents and detection reagents should be used in conjunction with the actual conditions of the laboratory.