In order to test if the pipeline would perform reliably under industry conditions we also used it with so-called production data from the
amedes analytical company. The sequencing was performed as follows:
45 mL of raw wastewater was centrifuged for 10 min with 10,000 x g at 4 °C. Subsequently, the supernatant was prefiltered using Filtropur S 0.45 μm filter units (Sarstedt, Darmstadt, Germany), further transferred to 100 kDa cutoff Amicon Ultra-15 units (PLHK Ultracel-PL Membran, 100 kDa Centrifugation units; Merck Sigma Aldrich Chemie GmbH, Taufkirchen, Germany) and processed according to the manufacturer's manual.
Automated RNA isolation was accomplished using a
Qia-Cube HT Extractor using the
QIAamp 96 DNA QIAcube HT Kit according to the manufacturer's protocol (Qiagen, Hildesheim, Germany).
Library preparation for NGS sequencing was performed following the complete Illumina SARS-CoV-2 sequencing workflow (Illumina
COVIDSeq Test, Illumina, San Diego, USA) including RNA-to-cDNA conversion and SARS-CoV-2 targeted PCR using the ARTIC V3 primer set. The generated libraries were analyzed using NextSeq 550 and 550Dx sequencers with
NextSeq 500/550 High Output Kits (v2.5; Illumina #20024906) generating 2 × 37 bp paired-end output.
Schumann V.F., de Castro Cuadrat R.R., Wyler E., Wurmus R., Deter A., Quedenau C., Dohmen J., Faxel M., Borodina T., Blume A., Freimuth J., Meixner M., Grau J.H., Liere K., Hackenbeck T., Zietzschmann F., Gnirss R., Böckelmann U., Uyar B., Franke V., Barke N., Altmüller J., Rajewsky N., Landthaler M, & Akalin A. (2022). SARS-CoV-2 infection dynamics revealed by wastewater sequencing analysis and deconvolution. The Science of the Total Environment, 853, 158931.