Mengelle C, Mansuy JM, Da Silva I, Guerin JL, Izopet J. Evaluation of a polymerase chain reaction-electrospray ionization time-of-flight mass spectrometry for the detection and subtyping of influenza viruses in respiratory specimens.
J Clin Virol 2013;
57:222-6. [PMID:
23557709 PMCID:
PMC7108247 DOI:
10.1016/j.jcv.2013.03.004]
[Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Revised: 02/27/2013] [Accepted: 03/06/2013] [Indexed: 11/29/2022]
Abstract
Background
PCR coupled to electrospray ionization mass spectrometry technology (PCR/ESI-TOF-MS) (PLEX-ID system, Abbott Ibis Biosciences) was developed to characterize microbial pathogens.
Objectives
To evaluate the performance of the PLEX-ID flu detection™ kit for detecting Influenza viruses by comparison with the multiplex RespiFinder® Kit (PathoFinder).
Study design
Acute-phase respiratory samples (n = 293) were analysed for this purpose. A subpopulation of influenza type A positive samples, identified with the RespiFinder® kit (n = 64), were subtyped with the RealTime ready Inf A/H1N1 Detection Set® (Roche Molecular Diagnostics) and results were compared to the PLEX-ID Flu Detection™ kit.
Results
274 samples gave concordant results (93.5%, p < 0.0001): 65 influenza A-positive, 18 influenza B-positive and 191 negative samples. Of these, 7 samples were PLEX-ID positive/RespiFinder® negative (5 influenza A and 2 influenza B) and 12 were PLEX-ID positive/RespiFinder® negative (10 influenza A and 2 influenza B). PLEX-ID showed one sample as an influenza A and B co-infection while the RespiFinder® assay showed it to be influenza A-positive. The sensitivity, specificity, positive and negative predictive values of the PLEX-ID™ system were 87.4%, 96.5%, 92.2% and 94.1% respectively. Thirteen of 19 discordant samples available for retesting were investigated further with the Anyplex™II RV16 Detection kit (Seegene): seven were RespiFinder® concordant, while six were PLEX-ID™ concordant. Subtyping of 61/64 influenza A samples was concordant (95.3%): 55 were H1N1pdm09 and six were non-H1N1pdm09. Three samples gave negative PLEX-ID™ results (one H1N1pdm09 and two non-H1N1pdm09).
Conclusions
PCR/ESI-TOF-MS technology showed good diagnostic performances to detect and subtype influenza viruses.
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