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2022-01-20Zeitschriftenartikel
RNA reference materials with defined viral RNA loads of SARS-CoV-2—A useful tool towards a better PCR assay harmonization
dc.contributor.authorVierbaum, Laura
dc.contributor.authorWojtalewicz, Nathalie
dc.contributor.authorGrunert, Hans-Peter
dc.contributor.authorLindig, Vanessa
dc.contributor.authorDuehring, Ulf
dc.contributor.authorDrosten, Christian
dc.contributor.authorCorman, Victor
dc.contributor.authorNiemeyer, Daniela
dc.contributor.authorCiesek, Sandra
dc.contributor.authorRabenau, Holger F.
dc.contributor.authorBerger, Annemarie
dc.contributor.authorObermeier, Martin
dc.contributor.authorNitsche, Andreas
dc.contributor.authorMichel, Janine
dc.contributor.authorMielke, Martin
dc.contributor.authorHuggett, Jim
dc.contributor.authorO’Sullivan, Denise
dc.contributor.authorBusby, Eloise
dc.contributor.authorCowen, Simon
dc.contributor.authorVallone, Peter M.
dc.contributor.authorCleveland, Megan H.
dc.contributor.authorFalak, Samreen
dc.contributor.authorKummrow, Andreas
dc.contributor.authorKeller, Thomas
dc.contributor.authorSchellenberg, Ingo
dc.contributor.authorZeichhardt, Heinz
dc.contributor.authorKammel, Martin
dc.date.accessioned2022-03-17T08:14:08Z
dc.date.available2022-03-17T08:14:08Z
dc.date.issued2022-01-20none
dc.identifier.other10.1371/journal.pone.0262656
dc.identifier.urihttp://edoc.rki.de/176904/9512
dc.description.abstractSARS-CoV-2, the cause of COVID-19, requires reliable diagnostic methods to track the circulation of this virus. Following the development of RT-qPCR methods to meet this diagnostic need in January 2020, it became clear from interlaboratory studies that the reported Ct values obtained for the different laboratories showed high variability. Despite this the Ct values were explored as a quantitative cut off to aid clinical decisions based on viral load. Consequently, there was a need to introduce standards to support estimation of SARS-CoV-2 viral load in diagnostic specimens. In a collaborative study, INSTAND established two reference materials (RMs) containing heat-inactivated SARS-CoV-2 with SARS-CoV-2 RNA loads of ~107 copies/mL (RM 1) and ~106 copies/mL (RM 2), respectively. Quantification was performed by RT-qPCR using synthetic SARS-CoV-2 RNA standards and digital PCR. Between November 2020 and February 2021, German laboratories were invited to use the two RMs to anchor their Ct values measured in routine diagnostic specimens, with the Ct values of the two RMs. A total of 305 laboratories in Germany were supplied with RM 1 and RM 2. The laboratories were requested to report their measured Ct values together with details on the PCR method they used to INSTAND. This resultant 1,109 data sets were differentiated by test system and targeted gene region. Our findings demonstrate that an indispensable prerequisite for linking Ct values to SARS-CoV-2 viral loads is that they are treated as being unique to an individual laboratory. For this reason, clinical guidance based on viral loads should not cite Ct values. The RMs described were a suitable tool to determine the specific laboratory Ct for a given viral load. Furthermore, as Ct values can also vary between runs when using the same instrument, such RMs could be used as run controls to ensure reproducibility of the quantitative measurements.eng
dc.language.isoengnone
dc.publisherRobert Koch-Institut
dc.rights(CC BY 3.0 DE) Namensnennung 3.0 Deutschlandger
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/de/
dc.subject.ddc610 Medizin und Gesundheitnone
dc.titleRNA reference materials with defined viral RNA loads of SARS-CoV-2—A useful tool towards a better PCR assay harmonizationnone
dc.typearticle
dc.identifier.urnurn:nbn:de:0257-176904/9512-0
dc.type.versionpublishedVersionnone
local.edoc.container-titlePLOS ONEnone
local.edoc.container-issn1932-6203none
local.edoc.type-nameZeitschriftenartikel
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
local.edoc.container-urlhttps://journals.plos.org/plosone/article?id=10.1371/journal.pone.0262656#referencesnone
local.edoc.container-publisher-namePublic Library of Sciencenone
local.edoc.container-volume17none
local.edoc.container-issue1none
local.edoc.container-year2022none
dc.description.versionPeer Reviewednone

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