Current Updates on Molecular Diagnostic Assays Used for Detection of <i>Candida auris</i>: A Systematic Review

<b>Background/Objectives</b>: <i>Candida auris</i> is an emerging multidrug-resistant pathogen with the potential to cause invasive fungal infections and healthcare-associated outbreaks. Currently, there is no systematic review explicitly focusing on the up-to-date molecular...

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Main Authors: River Chun-Wai Wong, Alfred Lok-Hang Lee, Ingrid Yu-Ying Cheung, Viola Chi-Ying Chow, Margaret Ip, Christopher Koon-Chi Lai
Format: Article
Language:English
Published: MDPI AG 2025-01-01
Series:Diagnostics
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Online Access:https://www.mdpi.com/2075-4418/15/2/140
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Summary:<b>Background/Objectives</b>: <i>Candida auris</i> is an emerging multidrug-resistant pathogen with the potential to cause invasive fungal infections and healthcare-associated outbreaks. Currently, there is no systematic review explicitly focusing on the up-to-date molecular diagnostics of this pathogen to cover the entire process, including sample pre-extraction procedures, nucleic acid extraction, and DNA-based detection. Sample pre-treatment and extraction are the prerequisites before molecular testing and have implications on the downstream detection but have not been reviewed elsewhere. This review aims to summarize a comprehensive update in the past 5 years. <b>Methods</b>: A systematic review was conducted to search for articles published in the period between 1 January 2020 and 20 November 2024 from various databases, including PubMed, Google Scholar, and Web of Science. The findings were produced through narrative synthesis, with quantitative analysis conducted where applicable. <b>Results</b>: Starting from 1115 records, 28 studies that met the inclusion criteria were included in the analysis. This review summarized the key updates on three categories, including (i) sample pre-extraction procedures and nucleic acid extraction, including magnetic, bead-beating, mechanical, chemical, thermal, and column-based protocols; (ii) commercial molecular assays; and (iii) laboratory-developed tests (LDTs). For real-time PCR, commercial molecular assays and LDTs showed sensitivity (ranging from 94.9% to 100% and 44% to 100%, respectively) and specificity (ranging from 98.2% to 100% and 92% to 100%, respectively). <b>Conclusions</b>: Here, we describe a useful summary to enlighten readers from clinical microbiology laboratories on the nucleic acid extraction protocols and performance of various molecular diagnostic assays used for the detection of <i>C. auris</i>.
ISSN:2075-4418