| Autor: |
Xiaohui Zou, Kang Chang, Yeming Wang, Mengxue Li, Wang Zhang, Chunlei Wang, Binghuai Lu, Zhujia Xiong, Jiajing Han, Yulin Zhang, Jiankang Zhao, Bin Cao |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
International Journal of Infectious Diseases, Vol 80, Iss , Pp 92-97 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
1201-9712 |
| DOI: |
10.1016/j.ijid.2018.12.014 |
| Popis: |
Background: The Xpert Xpress Flu/RSV assay is released by FDA for rapid detection of influenza A (FluA), influenza B (FluB), and respiratory syncytial virus (RSV). This study aimed to evaluate its clinical performance in comparison to that of the RT-PCR assay cleared by China FDA (CFDA-PCR). Methods: Nasopharyngeal specimens were collected from patients and tested by the two assays side by side. Discordant results were tested with a laboratory-developed real-time PCR for resolution. Viral load in the sample was quantified with a droplet digital PCR. Results: A total of 658 specimens were involved and gave 94.7%–99.1% agreement between the two assays. The Xpert assay showed higher sensitivity for FluA (100% vs. 89.8%) and FluB detection (100% vs. 95.3%), and also higher accuracy (98.9% vs. 95.7%) for FluA than the CDFA-PCR. The positive and negative predictive values (NPV) for the three viruses ranged from 90.5% to 100% in the two assays, with higher NPV for FluA and FluB in Xpert assay. Moreover, the Xpert Ct values showed a linear correlation with virus titer in specimens tested. Conclusion: Overall, the Xpert assay is a reliable and sensitive tool for the detection of FluA, FluB and RSV in our clinical settings. Keywords: Xpert Xpress Flu/RSV, RT-PCR, Digital PCR, Sensitivity |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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