检验医学 ›› 2021, Vol. 36 ›› Issue (8): 805-808.DOI: 10.3969/j.issn.1673-8640.2021.08.005

• 临床应用研究∙论著 • 上一篇    下一篇

不同灭活条件对常见呼吸道病原体核酸检测结果的影响

王博文1, 曾晓华2, 彭凯歌1, 刘畅1, 武莹超1, 黄英眉1, 马盼盼1, 拉姆次仁1, 李国凯1, 杨莉1   

  1. 1.西藏军区疾病预防控制中心,西藏 拉萨 850000
    2.西藏军区总医院感染科,西藏 拉萨 850000
  • 收稿日期:2020-05-01 出版日期:2021-08-30 发布日期:2021-08-30
  • 作者简介:王博文,男,1992年生,硕士,医师,主要从事流行病学和呼吸道传染病研究。

Influence of different inactivating conditions on nucleic acid determination for respiratory pathogens

WANG Bowen1, ZENG Xiaohua2, PENG Kaige1, LIU Chang1, WU Yingchao1, HUANG Yingmei1, MA Panpan1, Lamuciren 1, LI Guokai1, YANG Li1   

  1. 1. Center for Disease Control and Prevention of Tibet Military Region,Lhasa 850000,Tibet,China
    2. Department of Infectious Diseases,General Hospital of Tibet Military Region,Lhasa 850000,Tibet,China
  • Received:2020-05-01 Online:2021-08-30 Published:2021-08-30

摘要:

目的 探讨不同灭活条件对各种常见呼吸道病原体核酸检测结果的影响。方法 收集2020年1月—2021年3月西藏军区总医院腺病毒、支原体、甲型流感病毒或乙型流感病毒核酸检测阳性病例鼻拭子和咽拭子样本12份,设置灭活温度梯度和时间梯度,分别于56、66、76和86 ℃处理30 min,于56 ℃分别处理30、60、120、240、480和960 min,比较不同条件灭活处理和未灭活处理样本实时荧光定量聚合酶链反应(qPCR)检测结果。结果 对于腺病毒和支原体,56 ℃和66 ℃灭活处理30 min与未灭活处理样本的循环阈值(Ct)差异无统计学意义(P>0.05);76 ℃和86 ℃灭活处理30 min会使样本Ct值明显上升(P<0.05);56 ℃灭活30、60、120和240 min均不会造成样本Ct值的变化(P>0.05);56 ℃灭活480和960 min,会导致样本Ct值发生显著变化(P<0.05)。对于甲型流感病毒和乙型流感病毒,56 ℃灭活30 min与未灭活处理样本Ct值差异无统计学意义(P>0.05);66、76和86 ℃灭活30 min会使样本Ct值明显上升(P<0.05);56 ℃灭活30、60和120 min不会造成样本Ct值的变化(P>0.05);56 ℃灭活240、480 和960 min会导致样本Ct值发生显著变化(P<0.05)。结论 56 ℃灭活120 min以内不会改变病毒病原体qPCR检测结果。严重急性呼吸综合征冠状病毒2(SARS-CoV-2)的灭活处理不会对常见呼吸道病原体检测结果造成影响。

关键词: 呼吸道病原体, 灭活, 温度, 时间, 实时荧光定量聚合酶链反应

Abstract:

Objective To investigate the influence of different inactivating conditions on nucleic acid determination for respiratory pathogens. Methods A total of 12 patients who were positive of adenovirus,Mycoplasma,influenza A virus or influenza B virus in nasopharyngeal swabs were enrolled. Different inactivating temperatures and times were designed as follows:the samples were inactivated for 30 min in 56,66,76 and 86 ℃,as well as they were inactivated in 56 ℃ for 30,60,120,240,480 and 960 min. The real-time fluorescence quantitative polymerase chain reaction(qPCR) results were compared between the groups before and after inactivation. Results For adenovirus and Mycoplasma,no statistical significance was found in cycling threshold(Ct) values among the groups that were inactivated for 30 min in 56 and 66 ℃ and non-inactivation(P>0.05). An increase was determined in the groups that were inactivated for 30 min in 76 and 86 ℃(P<0.05). Inactivation in 56 ℃ for 30,60,120 and 240 min did not result in changes in Ct values of samples(P>0.05). Inactivation in 56 ℃ for 480 and 960 min would reduce the Ct values of samples(P<0.05). For influenza A virus and influenza B virus,no statistical significance was found in Ct values between the groups that were inactivated for 30 min in 56 ℃ and non-inactivation(P>0.05). An increase was determined in the groups that were inactivated for 30 min in 66,76 and 86 ℃(P<0.05). Inactivation in 56 ℃ for 30,60 and 120 min did not result in changes in Ct values of samples(P>0.05). Inactivation in 56 ℃ for 240,480 and 960 min would reduce the Ct values of samples(P<0.05). Conclusions The samples inactivated in 56 ℃ no more than 120 min would not influence the Ct values in qPCR. Inactivation for severe acute respiratory syndrome coronavirus 2(SARS-CoV-2) does not have effect on nucleic acid determination in other respiratory pathogens.

Key words: Respiratory pathogen, Inactivation, Temperature, Time, Real-time fluorescence quantitative polymerase chain reaction

中图分类号: