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. 2016 Dec 1;12(6):1286-1292.
doi: 10.5114/aoms.2016.62914. Epub 2016 Oct 24.

A diagnostic one-step real-time reverse transcription polymerase chain reaction method for accurate detection of influenza virus type A

Mohammad Amin Behzadi  1 , Mazyar Ziyaeyan  2 , Abdolvahab Alborzi  2
Affiliations

A diagnostic one-step real-time reverse transcription polymerase chain reaction method for accurate detection of influenza virus type A

Mohammad Amin Behzadi et al. Arch Med Sci. .

Abstract

Introduction: Influenza A is known as a public health concern worldwide. In this study, a novel one-step real-time reverse transcription polymerase chain reaction (rtRT-PCR) assay was designed and optimized for the detection of influenza A viruses.

Material and methods: The primers and probe were designed based on the analysis of 90 matrix nucleotide sequence data of influenza type A subtypes from the GenBank database of the National Center for Biotechnology Information (NCBI). The influenza virus A/Tehran/5652/2010 (H1N1 pdm09) was used as a reference. The rtRT-PCR assay was optimized, compared with that of the World Health Organization (WHO), and its analytical sensitivity, specificity and reproducibility were evaluated. In total, 64 nasopharyngeal swabs from patients with influenza-like illness (ILI) and 41 samples without ILI symptoms were tested for the virus, using conventional cell culture, direct immunofluorescence antibody (DFA) methods, and one-step rtRT-PCR with the designed primer set and probe and the WHO's.

Results: The optimized assay results were similar to the WHO's. The optimized assay results were similar to WHO's, with non-significant differences for 10-103 copies of viral RNA/reaction (p > 0.05). It detected 10 copies of viral RNA/reaction with high reproducibility and no cross reactivity with other respiratory viruses. A specific cytopathic effect was observed in 6/64 (9.37%) of the ILI group using conventional culture and DFA staining methods; however, it was not seen in non-ILI. Also, the results of our assay and the WHO's were similar to those of viral isolation and DFA staining.

Conclusions: Given the high specificity, sensitivity and reproducibility of this novel assay, it can serve as a reliable diagnostic tool for the detection of influenza A viruses in clinical specimens and lab experiments.

Keywords: detection; influenza A virus; one-step real-time polymerase chain reaction.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Amplification plot and standard curve of the one-step rtRT-PCR assay for the detection of 10-fold dilutions of the recombinant plasmid containing the target M gene
See this image and copyright information in PMC

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