To reduce the morbidity and mortality of candidemia patients through rapid treatment, the development of a simple, rapid molecular diagnostic method that is based on nucleic acid extraction and is superior to conventional methods for detecting Candida in the blood is necessary. We developed a multiplex Candida Pan/internal control (IC) loop-mediated isothermal amplification (LAMP) assay and a simple DNA extraction boiling protocol using Chelex-100 that could extract yeast DNA in blood within 20 min. The Chelex-100/boiling method for DNA extraction showed comparable efficiency to that of the commercial QIAamp UCP Pathogen Mini Kit using Candida albicans qPCR. In addition, the Candida Pan/IC LAMP assay showed superior sensitivity to that of general Candida Pan and species qPCRs against clinical DNA samples extracted with the QIAamp UCP Pathogen Mini Kit and Chelex-100/boiling method. The Candida Pan/IC LAMP assay followed by Chelex-100/boiling-mediated DNA extraction showed high sensitivity (100%) and specificity (100%) against clinical samples infected with Candida. These results suggest that the Candida Pan/IC LAMP assay could be used as a rapid molecular diagnostic test for candidemia.
Bibliographical noteFunding Information:
This study was supported by a grant from the Korea Health Technology R&D Project, through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health and Welfare, Republic of Korea (grant number, HR20C0021), and by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MEST) (No. 2020R1A2C101176511).
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.
- Candida albicans
- Candida spp
- DNA extraction
- Multiplex LAMP
ASJC Scopus subject areas
- Immunology and Allergy
- Molecular Biology
- General Immunology and Microbiology
- Microbiology (medical)
- Infectious Diseases