Pond, MJ; Al-Mufti, J; Madona, P; Crone, MA; Laing, KG; Hale, RS; Muir, D; Randell, P
(2023)
Mpox infection investigation using multiplexed syndromic diagnostics: Evaluation of an AusDiagnostics multiplexed tandem PCR (MT-PCR) syndromic panel.
Journal of Clinical Virology Plus, 3 (2).
p. 100142.
ISSN 2667-0380
https://doi.org/10.1016/j.jcvp.2023.100142
SGUL Authors: Laing, Kenneth
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Abstract
Background Detection of mpox virus during investigation of viral vesicular rash illness is required to identify mpox infection. Objectives This study evaluated the performance of a research-use-only (RUO) AusDiagnostics MT-PCR syndromic assay containing an mpox virus target. Methods The analytical specificity and limit of detection (LoD) of the AusDiagnostics MT-PCR mpox assay was verified using control material. Clinical performance was evaluated using anonymised residual nucleic acids extracted from swab specimens previously tested for mpox virus using a laboratory developed test (LDT). Residual nucleic acids were derived from consecutive sample panels collected during two periods in the 2022 mpox outbreak. Results The AusDiagnostics MT-PCR assay demonstrated an LoD of 35 input copies of mpox virus and correctly detected all relevant members of a specificity panel (n = 34). 175 residual nucleic acids were included in the study with a prevalence of mpox of 40.0% (95%CI 32.7–47.6). The AusDiagnostics MT-PCR mpox assay demonstrated an accuracy of 98.9% (95%CI 93.8–99.9), sensitivity of 94.2% (95%CI 85.2 – 98.1) and specificity of 100% (95%CI 95.6 -100), when compared to the LDT qPCR assay. The AusDiagnostics MT-PCR mpox assay detected additional vesicular rash pathogens in 26.8% samples. Co-detection with other vesicular rash pathogens was described in 12.8% of mpox virus detected samples Conclusions Performance of the RUO AusDiagnostics MT-PCR mpox assay was comparable to an LDT qPCR for the detection of mpox virus in nucleic acids extracted from swab specimens. The RUO AusDiagnostics MT-PCR mpox assay facilitated the simultaneous detection of additional infective etiologies of vesicular rash syndromes.
Item Type: | Article |
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Additional Information: | © 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) |
SGUL Research Institute / Research Centre: | Academic Structure > Infection and Immunity Research Institute (INII) |
Journal or Publication Title: | Journal of Clinical Virology Plus |
ISSN: | 2667-0380 |
Language: | en |
Publisher License: | Creative Commons: Attribution 4.0 |
URI: | https://openaccess.sgul.ac.uk/id/eprint/115268 |
Publisher's version: | https://doi.org/10.1016/j.jcvp.2023.100142 |
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