Evidence map›Paper›PMID 35313427›Full record

ArticleThe Indian journal of medical research2022

Development of a RT-LAMP assay for detection of SARS-CoV-2.

Shyam Sundar Nandi, Upendra Pradeep Lambe, Sonali Ankush Sawant, Trupti Gohil, Jagadish Deshpande

Open access · diamondAbstract read
In one paragraph

Article in The Indian journal of medical research, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
0.3field-weighted citation impact, top 51% 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

5 citing papers in PubMed, 4 citations in OpenAlex.

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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

5 authors at 2 institutions in 1 country.

Shyam Sundar NandiICMR-National Institute of Virology, (Mumbai Unit), Haffkine Institute Compound, Mumbai, Maharashtra, India.
Upendra Pradeep LambeICMR-National Institute of Virology, (Mumbai Unit), Haffkine Institute Compound, Mumbai, Maharashtra, India.
Sonali Ankush SawantICMR-National Institute of Virology, (Mumbai Unit), Haffkine Institute Compound, Mumbai, Maharashtra, India.
Trupti GohilICMR-National Institute of Virology, (Mumbai Unit), Haffkine Institute Compound, Mumbai, Maharashtra, India.
Jagadish DeshpandeICMR-National Institute of Virology, (Mumbai Unit), Haffkine Institute Compound, Mumbai, Maharashtra, India.
Haffkine Institute · INICMR-National Institute of Virology · IN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background & objectives: The pandemic of SARS-COV-2 began in Wuhan, China in December 2019 and has caused more than 101 million cases worldwide. Diagnostic technologies possessing sensitivity and specificity equivalent to real-time reverse-transcriptase polymerase chain reaction (rRT-PCR) assays are needed to ramp up testing capacity in most countries. Newer platforms need to be technically less demanding, require minimum equipment and reduce turn-around time for reporting results. The objective of this study was to exploit loop-mediated isothermal amplification (LAMP) for the detection of SARS-CoV-2 and evaluate its performance by comparison with rRT-PCR. Methods: Reverse-transcription LAMP (RT-LAMP) assay primers were designed to detect envelop (E) and nucleocapsid (N) genes of SARS-CoV-2. Positive control RNA was prepared by in vitro transcription of E and N genes clones. RT-LAMP amplification reactions were incubated at 65°C for 30 min. Results were recorded visually. RT-LAMP results were evaluated by comparing the results obtained with a commercial rRT-PCR kit. Results: The RT-LAMP assay for E and N genes was carried out in separate tubes. RT-LAMP detected about 40 copies of SARS-CoV-2 RNA per reaction. A total of 253 throat swabs were tested using the RT-LAMP assay. The overall diagnostic sensitivity and specificity of the LAMP assay were 98.46 and 100 per cent, respectively, as compared to the rRT-PCR. Interpretation & conclusions: SARS-CoV-2 RT-LAMP assay was designed, standardized and evaluated. The assay showed diagnostic sensitivity and specificity equivalent to rRT-PCR assays. The assay will be useful to increase testing capacity for the detection of SARS-CoV-2 in the country.

Indexed as

COVID-19SARS-CoV-2COVID-19 TestingHumansMolecular Diagnostic TechniquesNucleic Acid Amplification TechniquesRNA, ViralSensitivity and SpecificityRNA, ViralCOVID-19isothermal amplificationRT-LAMPSARS-CoV-2visual detection

Identifiers

PMID35313427
PMCPMC9552371
OpenAlexW4220906175

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-SA
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.