Analytical sensitivity and clinical performance of a triplex RT-qPCR assay using CDC N1, N2, and RP targets for SARS-CoV-2 diagnosis
Background: Several RT-qPCR kits are available for SARS-CoV-2 diagnosis and some have emergency use authorization from the US Food and Drug Administration. In particular, the nCoV19 CDC kit includes two targets for detecting SARS-CoV-2 (N1 and N2) and an RNaseP (RP) target for RNA extraction quality control, all of which are labeled with FAM, and thus three PCR reactions are required per sample. Methods: We designed a triplex RT-qPCR assay based on nCoV19 primers and probes where N1, N2, and RP are labeled with FAM, HEX, and Cy5, respectively, so only a single PCR reaction is required for each sample for SARS-CoV-2 diagnosis. Results: In total, 172 samples were analyzed in both singleplex and triplex assays, where 86 samples tested SARS-CoV-2 negative with both assays, so the triplex assay specificity was 100%. In addition, 86 samples tested SARS-Co-V 2 positive with the singleplex assay and 84 with the triplex assay, so the sensitivity was 97.7%. The limit of detection for the triplex assay was determined as 1000 copies/mL. Conclusions: This new triplex RT-qPCR assay based on primers and probes from the CDC protocol is highly reliable for SARS-CoV-2 diagnosis, and it could speed up detection and save reagents during the current SARS-CoV-2 testing supplies shortage..
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:102 |
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| Enthalten in: |
International Journal of Infectious Diseases - 102(2021), Seite 14-16 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Byron Freire-Paspuel [VerfasserIn] |
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| Links: |
doi.org [kostenfrei] |
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| Themen: |
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| doi: |
10.1016/j.ijid.2020.10.047 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
DOAJ071945210 |
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| 245 | 1 | 0 | |a Analytical sensitivity and clinical performance of a triplex RT-qPCR assay using CDC N1, N2, and RP targets for SARS-CoV-2 diagnosis |
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| 520 | |a Background: Several RT-qPCR kits are available for SARS-CoV-2 diagnosis and some have emergency use authorization from the US Food and Drug Administration. In particular, the nCoV19 CDC kit includes two targets for detecting SARS-CoV-2 (N1 and N2) and an RNaseP (RP) target for RNA extraction quality control, all of which are labeled with FAM, and thus three PCR reactions are required per sample. Methods: We designed a triplex RT-qPCR assay based on nCoV19 primers and probes where N1, N2, and RP are labeled with FAM, HEX, and Cy5, respectively, so only a single PCR reaction is required for each sample for SARS-CoV-2 diagnosis. Results: In total, 172 samples were analyzed in both singleplex and triplex assays, where 86 samples tested SARS-CoV-2 negative with both assays, so the triplex assay specificity was 100%. In addition, 86 samples tested SARS-Co-V 2 positive with the singleplex assay and 84 with the triplex assay, so the sensitivity was 97.7%. The limit of detection for the triplex assay was determined as 1000 copies/mL. Conclusions: This new triplex RT-qPCR assay based on primers and probes from the CDC protocol is highly reliable for SARS-CoV-2 diagnosis, and it could speed up detection and save reagents during the current SARS-CoV-2 testing supplies shortage. | ||
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