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Zhang RQ, Li Z, Li GX, Tie YQ, Li XN, Gao Y, Duan QX, Wang L, Zhao L, Fan GH, Bai XD, Wang RH, Chen ZW, Wang JR, Wu Y, Zhao MC, Feng ZS, Wang J, Ma XJ. A highly sensitive one-tube nested quantitative real-time PCR assay for specific detection of Bordetella pertussis using the LNA technique. Int J Infect Dis 2020; 93:224-230. [PMID: 32045697 DOI: 10.1016/j.ijid.2020.01.053] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 01/24/2020] [Accepted: 01/28/2020] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVES Bordetella pertussis is a highly contagious respiratory agent and is the causative pathogen of pertussis, which primarily affects children. Current diagnostic techniques for this pathogen have a variety of limitations including a long culture time, low bacterial load, and lack of specificity. METHODS This article reports the development of a one-tube nested quantitative real-time PCR assay using the locked nucleic acid (LNA) technique (LNA-OTN-q-PCR), targeting the BP485 gene and using a simple inexpensive extraction method. A total of 130 clinical samples from patients with clinically suspected pertussis, collected from the Children's Hospital of Hebei, China, were tested by LNA-OTN-q-PCR assay. RT-PCR and two-step semi-nested PCR assays were performed in parallel for comparison. RESULTS Only strains of B. pertussis were identified as positive, whereas all of the remaining strains were appropriately identified as negative by the LNA-OTN-q-PCR assay. A single copy per reaction can be detected by the LNA-OTN-q-PCR assay. Additionally, the sensitivity of this method was 100 times that of the RT-PCR assay (100 copies per reaction). Sixty-three of the 130 clinical samples were detected positive by LNA-OTN-q-PCR assay; in contrast, RT-PCR was able to detect only 41 positive samples. Following this, all 63 samples were positively identified by two-step semi-nested PCR. Compared with the two-step semi-nested PCR assay, both the specificity and sensitivity of the LNA-OTN-q-PCR assay using purified DNA and crude extract were 100%. CONCLUSIONS This assay was able to detect B. pertussis infection with high sensitivity and specificity. This test shows great potential as a promising technique to detect B. pertussis in both clinical laboratories and public health settings.
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Affiliation(s)
- Rui-Qing Zhang
- Hebei Medical University, Shijiazhuang, 050031, Hebei, China; NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, No. 155, Changbai Street, Changping District, Beijing 102206, China; Hebei General Hospital, Shijiazhuang, 050051, Hebei, China.
| | - Zheng Li
- Hebei General Hospital, Shijiazhuang, 050051, Hebei, China.
| | - Gui-Xia Li
- Children's Hospital of Hebei Province, Shijiazhuang, 050031, Hebei, China.
| | - Yan-Qing Tie
- Hebei General Hospital, Shijiazhuang, 050051, Hebei, China.
| | - Xin-Na Li
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, No. 155, Changbai Street, Changping District, Beijing 102206, China.
| | - Yuan Gao
- Hebei Medical University, Shijiazhuang, 050031, Hebei, China; NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, No. 155, Changbai Street, Changping District, Beijing 102206, China.
| | - Qing-Xia Duan
- Hebei Medical University, Shijiazhuang, 050031, Hebei, China; NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, No. 155, Changbai Street, Changping District, Beijing 102206, China.
| | - Le Wang
- Children's Hospital of Hebei Province, Shijiazhuang, 050031, Hebei, China.
| | - Li Zhao
- Children's Hospital of Hebei Province, Shijiazhuang, 050031, Hebei, China.
| | - Guo-Hao Fan
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, No. 155, Changbai Street, Changping District, Beijing 102206, China.
| | - Xue-Ding Bai
- Tangshan Gongren Hospital, Tangshan, 063000, China.
| | - Rui-Huan Wang
- Hunan Provincial Center for Disease Control and Prevention, Hunan, 410005, China.
| | - Zi-Wei Chen
- The Third Xiangya Hospital of Central South University, Hunan, 410013, China.
| | - Jin-Rong Wang
- Hebei Medical University, Shijiazhuang, 050031, Hebei, China; NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, No. 155, Changbai Street, Changping District, Beijing 102206, China.
| | - Yong Wu
- Health Gene Technologies, Ningbo, 315040, China.
| | - Meng-Chuan Zhao
- Children's Hospital of Hebei Province, Shijiazhuang, 050031, Hebei, China.
| | - Zhi-Shan Feng
- Hebei Medical University, Shijiazhuang, 050031, Hebei, China; Hebei General Hospital, Shijiazhuang, 050051, Hebei, China.
| | - Ji Wang
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, No. 155, Changbai Street, Changping District, Beijing 102206, China.
| | - Xue-Jun Ma
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, No. 155, Changbai Street, Changping District, Beijing 102206, China.
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