Evidence map›Paper›PMID 33468686›Full record

ArticlemBio2021

Genome Sequencing of Sewage Detects Regionally Prevalent SARS-CoV-2 Variants.

Alexander Crits-Christoph, Rose S Kantor, Matthew R Olm, Oscar N Whitney, Basem Al-Shayeb, Yue Clare Lou, Avi Flamholz, Lauren C Kennedy, Hannah Greenwald, Adrian Hinkle and 9 more

Open access · goldAbstract read
In one paragraph

Article in mBio, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 212 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
212citing papers in PubMed, 1 pooled it
22.1field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

212 citing papers in PubMed, 1 synthesis or guideline pooled it, 373 citations in OpenAlex.

  1. Pooled it
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  6. Rapid evolution reveals long-range spread of SARS-CoV-2.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  20. Dynamics of SARS-CoV-2 variants in southwest Ohio municipal wastewater.Environmental science : water research & technology · 2025
    Article

152 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

19 authors at 5 institutions in 1 country.

Alexander Crits-ChristophDepartment of Plant and Microbial Biology, University of California, Berkeley, California, USA.
Rose S KantorDepartment of Civil and Environmental Engineering, University of California, Berkeley, California, USA.
Matthew R OlmDepartment of Microbiology and Immunology, Stanford University, Stanford, California, USA.
Oscar N WhitneyDepartment of Molecular and Cell Biology, University of California, Berkeley, California, USA.
Basem Al-ShayebDepartment of Plant and Microbial Biology, University of California, Berkeley, California, USA.
Yue Clare LouDepartment of Plant and Microbial Biology, University of California, Berkeley, California, USA.
Avi FlamholzDepartment of Molecular and Cell Biology, University of California, Berkeley, California, USA.
Lauren C KennedyDepartment of Civil and Environmental Engineering, University of California, Berkeley, California, USA.
Hannah GreenwaldDepartment of Civil and Environmental Engineering, University of California, Berkeley, California, USA.
Adrian HinkleDepartment of Civil and Environmental Engineering, University of California, Berkeley, California, USA.
Jonathan HetzelIllumina, San Diego, California, USA.
Sara SpitzerIllumina, San Diego, California, USA.
Jeffery KobleIllumina, San Diego, California, USA.
Asako TanIllumina, San Diego, California, USA.
Fred HydeIllumina, Madison, Wisconsin, USA.
Gary SchrothIllumina, San Diego, California, USA.
Scott KuerstenIllumina, Madison, Wisconsin, USA.
Jillian F BanfieldInnovative Genomics Institute, Berkeley, California, USA.
Kara L NelsonInnovative Genomics Institute, Berkeley, California, USA karanelson@berkeley.edu.
Illumina (United States) · USUniversity of California, Berkeley · USInnovative Genomics Institute · USLawrence Berkeley National Laboratory · USStanford University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Viral genome sequencing has guided our understanding of the spread and extent of genetic diversity of SARS-CoV-2 during the COVID-19 pandemic. SARS-CoV-2 viral genomes are usually sequenced from nasopharyngeal swabs of individual patients to track viral spread. Recently, RT-qPCR of municipal wastewater has been used to quantify the abundance of SARS-CoV-2 in several regions globally. However, metatranscriptomic sequencing of wastewater can be used to profile the viral genetic diversity across infected communities. Here, we sequenced RNA directly from sewage collected by municipal utility districts in the San Francisco Bay Area to generate complete and nearly complete SARS-CoV-2 genomes. The major consensus SARS-CoV-2 genotypes detected in the sewage were identical to clinical genomes from the region. Using a pipeline for single nucleotide variant calling in a metagenomic context, we characterized minor SARS-CoV-2 alleles in the wastewater and detected viral genotypes which were also found within clinical genomes throughout California. Observed wastewater variants were more similar to local California patient-derived genotypes than they were to those from other regions within the United States or globally. Additional variants detected in wastewater have only been identified in genomes from patients sampled outside California, indicating that wastewater sequencing can provide evidence for recent introductions of viral lineages before they are detected by local clinical sequencing. These results demonstrate that epidemiological surveillance through wastewater sequencing can aid in tracking exact viral strains in an epidemic context.

Indexed as

Base SequenceCaliforniaCOVID-19Environmental MicrobiologyGenome, ViralGenotypeHumansMetagenomeMetagenomicsPolymorphism, Single NucleotideReal-Time Polymerase Chain ReactionRNA, ViralSARS-CoV-2SewageTranscriptomeRNA, ViralSewagecoronavirusenvironmental microbiologygenomicsmetagenomics

Identifiers

PMID33468686
PMCPMC7845645
OpenAlexW3124259713

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.