Useful Molecular Tools for Facing Next Pandemic Events: Effective Sample Preparation and Improved RT-PCR for Highly Sensitive Detection of SARS-CoV-2 in Wastewater Environment

Overview

Journal Int J Hyg Environ Health

Specialties Environmental Health
Public Health

Date 2022 Aug 8

PMID 35939897

Authors

Magdalena Ruskova

Maria Buckova

Adam Achs

Andrea Puskarova

Jer-Horng Wu

Tomas Kuchta

Zdeno Subr

Domenico Pangallo

Affiliations

Soon will be listed here.

Abstract

Viral pandemics can be inevitable in the next future. Considering SARS-CoV-2 pandemics as an example, there seems to be a need to develop a surveillance system able to monitor the presence of potential pathogenic agents. The sewage and wastewater environments demonstrated to be suitable targets for such kind of analysis. In addition, it is important to have reliable molecular diagnostic tools and also to develop a robust detection strategy. In this study, an effective sample preparation procedure was selected from four options and combined with a newly developed improved RT-PCR. First, a model viral system was constructed, containing a fragment of the SARS-CoV-2 gene encoding for the Spike protein. The encapsidated S RNA mimic (ESRM) was based on the plum pox virus (PPV) genome with the inserted targeted gene fragment. ESRM was used for seeding wastewater samples in order to evaluate the viral recovery of four different viral RNA concentration/extraction methods. The efficiency of individual approaches was assessed by the use of a quantitative reverse transcription PCR (qRT-PCR) and by a one-step single-tube nested quantitative reverse transcription PCR (OSN-qRT-PCR). For the detection of viruses in wastewater samples with low viral loads, OSN-qRT-PCR assay produced the most satisfactory results and the highest sensitivity.

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