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INTRODUCTION: Efficient detection of SARS-CoV-2 will continue to be an invaluable tool for pandemic control. Current instructions specify that the collection swab should be transported within its collection media to the laboratory. Developing a process whereby this swab is removed before transport to the lab would allow for improved automation and decreased manual manipulation of samples. METHODS: A proof of principle approach was taken by eluting viral particles from flocked swabs into collection buffer with and without a mucus background. Paired swab-free and swab-containing samples were transported to the laboratory and evaluated for SARS-CoV-2 (n = 28) or RNaseP (n = 6). SARS-CoV-2 amplification was performed using the Hologic Panther Fusion Aptima and RT-PCR assays. RESULTS: SARS-CoV-2 was detected in all proof of principle samples with Ct values indicative of dilution. The rare exception was for a few samples where the dilution pushed the viral load below the LOD. Paired samples were 100% concordant for SARS-CoV-2 and RNaseP detection. CONCLUSION: Discarding the swab after inoculating the transport buffer is an appropriate pre-analytical modification. Adopting this approach can save up to 1 minute/sample. For labs processing more than 500 samples/day this equates to one full time equivalent shift/day.
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document_parses/pdf_json/df5dd098c7f0e6c995313f8cbc7cb1b414d4858c.json
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Swab-free transport as an optimized pre-analytical workflow for SARS-COV-2 amplification
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