Evidence map›Paper›PMID 34867841›Full record

ArticleFrontiers in microbiology2021

Optimization and Clinical Validation of Colorimetric Reverse Transcription Loop-Mediated Isothermal Amplification, a Fast, Highly Sensitive and Specific COVID-19 Molecular Diagnostic Tool That Is Robust to Detect SARS-CoV-2 Variants of Concern.

Pedro A Alves, Ellen G de Oliveira, Ana Paula M Franco-Luiz, Letícia T Almeida, Amanda B Gonçalves, Iara A Borges, Flávia de S Rocha, Raissa P Rocha, Matheus F Bezerra, Pâmella Miranda and 6 more

Open access · goldAbstract read
In one paragraph

Article in Frontiers in microbiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
3.0field-weighted citation impact, top 8% 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

20 citing papers in PubMed, 1 synthesis or guideline pooled it, 39 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Biology methods & protocols · 2026
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  14. Recent advances in point of care testing for COVID-19 detection.Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie · 2022
    Review
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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

16 authors at 3 institutions in 1 country.

Pedro A AlvesInstituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil.
Ellen G de OliveiraInstituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil.
Ana Paula M Franco-LuizInstituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil.
Letícia T AlmeidaInstituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil.
Amanda B GonçalvesInstituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil.
Iara A BorgesInstituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil.
Flávia de S RochaInstituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil.
Raissa P RochaCentro de Tecnologia em Vacinas, UFMG/Fiocruz, Belo Horizonte, Brazil.
Matheus F BezerraDepartamento de Microbiologia, Instituto Aggeu Magalhães, Fundação Oswaldo Cruz, Recife, Brazil.
Pâmella MirandaDepartamento de Física, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
Flávio D CapanemaNúcleo de Inovação Tecnológica, Fundação Hospitalar do Estado de Minas Gerais, Belo Horizonte, Brazil.
Henrique R MartinsVisuri Equipamentos e Serviços, Belo Horizonte, Brazil.
Gerald WeberDepartamento de Física, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
Santuza M R TeixeiraCentro de Tecnologia em Vacinas, UFMG/Fiocruz, Belo Horizonte, Brazil.
Gabriel Luz WallauDepartamento de Entomologia e Núcleo de Bioinformática, Instituto Aggeu Magalhães, Fundação Oswaldo Cruz, Recife, Brazil.
Rubens L do Monte-NetoInstituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil.
Fundação Oswaldo Cruz · BRUniversidade Federal de Minas Gerais · BRFundação Hospitalar do Estado de Minas Gerais · BR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The coronavirus disease 2019 (COVID-19) pandemic unfolded due to the widespread severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission reinforced the urgent need for affordable molecular diagnostic alternative methods for massive testing screening. We present the clinical validation of a pH-dependent colorimetric reverse transcription loop-mediated isothermal amplification (RT-LAMP) for SARS-CoV-2 detection. The method revealed a limit of detection of 19.3 ± 2.7 viral genomic copies/μL when using RNA extracted samples obtained from nasopharyngeal swabs collected in guanidine-containing viral transport medium. Typical RT-LAMP reactions were performed at 65°C for 30 min. When compared to reverse transcriptase-quantitative polymerase chain reaction (RT-qPCR), up to cycle-threshold (Ct) value 32, RT-LAMP presented 98% [95% confidence interval (CI) = 95.3-99.5%] sensitivity and 100% (95% CI = 94.5-100%) specificity for SARS-CoV-2 RNA detection targeting

Indexed as

COVID-19diagnostic testmolecular testrespiratory virusRT-LAMPSARS-CoV-2

Identifiers

PMID34867841
PMCPMC8637279
OpenAlexW3216623653

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.