Evidence map›Paper›PMID 32519796›Full record

ArticleInfluenza and other respiratory viruses2020

A six-plex droplet digital RT-PCR assay for seasonal influenza virus typing, subtyping, and lineage determination.

Nathaniel K C Leong, Daniel K W Chu, Julie T S Chu, Yat H Tam, Dennis K M Ip, Benjamin J Cowling, Leo L M Poon

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Article in Influenza and other respiratory viruses, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
2.2field-weighted citation impact, top 11% 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

8 citing papers in PubMed, 24 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

7 authors at 1 institution in 1 country.

Nathaniel K C LeongSchool of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
Daniel K W ChuSchool of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
Julie T S ChuSchool of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
Yat H TamSchool of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
Dennis K M IpSchool of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
Benjamin J CowlingSchool of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China.ORCID 0000-0002-6297-7154
Leo L M PoonSchool of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China.ORCID 0000-0002-9101-7953
University of Hong Kong · HK

Funding

NIAID NIH HHS HHSN272201400006C
6 · The paper itself

Abstract

backgroundThere are two influenza A subtypes (H1 and H3) and two influenza B lineages (Victoria and Yamagata) that currently co-circulate in humans. In this study, we report the development of a six-plex droplet digital RT-PCR (ddRT-PCR) assay that can detect HA and M segments of influenza A (H1, H3, and M) and influenza B (Yamagata HA, Victoria HA, and M) viruses in a single reaction mixture. It can simultaneously detect six different nucleic acid targets in a ddRT-PCR platform.

methodsThe six-plex ddRT-PCR used in this study is an amplitude-based multiplex assay. The analytical performance of the assay was evaluated. Correlation with standard qRT-PCR methodology was assessed using 55 clinical samples.

resultsThe assay has a wide dynamic range, and it has good reproducibility within and between runs. The limit of quantification of each target in this assay ranged from 15 copies/reaction for influenza B Victoria M gene to 45 copies/reaction for influenza B Yamagata M gene. In addition, this assay can accurately quantify each of these targets in samples containing viral RNAs from two different viruses that were mixed in a highly skewed ratio. Typing, subtyping, and lineage differentiation data of 55 tested clinical respiratory specimens were found to be identical to those deduced from standard monoplex qRT-PCR assays.

conclusionsThe six-plex ddRT-PCR test was demonstrated to be highly suitable for detecting dual influenza infection cases. This assay is expected to be a useful diagnostic tool for clinical and research use.

Indexed as

Molecular Diagnostic TechniquesPolymerase Chain ReactionHumansInfluenza A virusInfluenza B virusInfluenza, HumanLimit of DetectionReproducibility of ResultsRNA, ViralSeasonsViral ProteinsRNA, ViralViral Proteinsdigital RT-PCRinfluenzaRT-PCR

Identifiers

PMID32519796
PMCPMC7578307
OpenAlexW3033155016

What OpenQuestion holds

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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.