Cited by 109Antifungal resistance and susceptibilityYeasts and Rust Fungi StudiesFungal Infections and Studies

Increasing prevalence, molecular characterization and antifungal drug susceptibility of serial Candida auris isolates in Kuwait

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Khan, Ziauddin, Ahmad, Suhail, Al-Sweih, Noura, Joseph, Leena, Alfouzan, Wadha, Asadzadeh, Mohammad·2018·PLOS ONE

Abstract

Candida auris is an emerging yeast pathogen of global significance. Its multidrug-resistant nature and inadequacies of conventional identification systems pose diagnostic and therapeutic challenges. This study investigated occurrence of C. auris in clinical specimens in Kuwait and its susceptibility to antifungal agents. Clinical yeast strains isolated during 3.5-year period and forming pink-colored colonies on CHROMagar Candida were studied by wet mount examination for microscopic morphology and Vitek 2 yeast identification system. A simple species-specific PCR assay was developed for molecular identification and results were confirmed by PCR-sequencing of rDNA. Antifungal susceptibility testing of one isolate from each patient was determined by Etest. The 280 isolates forming pink-colored colonies on CHROMagar Candida, were identified by Vitek 2 as Candida haemulonii (n = 166), Candida utilis (n = 49), Candida kefyr (n = 45), Candida guilliermondii (n = 9), Candida famata (n = 6) and Candida conglobata (n = 5). Species-specific PCR and PCR-sequencing of rDNA identified 166 C. haemulonii isolates as C. auris (n = 158), C. haemulonii (n = 6) and Candida duobushaemulonii (n = 2). C. auris isolates originated from diverse clinical specimens from 56 patients. Of 56 C. auris isolates tested, all were resistant to fluconazole, 41/56 (73%) and 13/56 (23%) were additionally resistant to voriconazole and amphotericin B, respectively. Eleven (20%) isolates were resistant to fluconazole, voriconazole and amphotericin B. One isolate was resistant to caspofungin and micafungin. Increasing isolation of C. auris in recent years from diverse clinical specimens including bloodstream shows that C. auris is an emerging non-albicans Candida species in Kuwait causing a variety of infections. Inability of conventional identification methods to accurately identify this pathogen and multidrug-resistant nature of many strains calls for a greater understanding of its epidemiology, risk factors for acquiring C. auris infection and management strategies in high-risk patients. This is the first comprehensive study on the emergence of this multidrug-resistant yeast from Kuwait and the Middle East.

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  • The pitavastatin-fluconazole interactions were not sufficient to restore fluconazole activity in several fluconazole-resistant isolates; two C. albicans and four C. auris isolates maintained their resistance profiles to fluconazole.

    “Of note, although pitavastatin was able to demonstrate broad-spectrum synergistic interactions with fluconazole, these interactions were not sufficient to restore the antifungal activity of fluconazole in several fluconazole-resistant isolates. Considering the current resistance breakpoints for azole drugs, two C. albicans and four C. auris isolates maintained their resistance profiles to fluconaz”

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  1. [42]Chowdhary A, Prakash A, Sharma C, Kordalewska M, Kumar A, Sarma S, et al A multicentre study of antifungal susceptibility patterns among 350 Candida auris isolates (2009–17) in India: role of the ERG11 and FKS1 genes in azole and echinocandin resistance. J Antimicrob Chemother 2018 1 9 doi: 10.1093/jac/dkx480 29325167 · DOI · Paper page

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Authors
Khan, Z., Ahmad, S., Al-Sweih, N., Joseph, L., Alfouzan, W., & Asadzadeh, M.
Affiliations
Kuwait University (KW)
Corresponding author
Khan, Ziauddin
Venue
PLOS ONE
Published
2018-04-09
Volume
13
Issue
4
Pages
e0195743
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2796525063
Cited by
109
References
46
Citations by year
2026: 9 · 2025: 5 · 2024: 11 · 2023: 10 · 2022: 11 · 2021: 13 · 2020: 19 · 2019: 22 · 2018: 9
FWCI
11.89
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
Kuwait University Research Sector (MI01/15)
Topics
  • Health Sciences › Medicine › Infectious Diseases › Antifungal resistance and susceptibility
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Yeasts and Rust Fungi Studies
  • Health Sciences › Medicine › Epidemiology › Fungal Infections and Studies
Keywords
Candida auris, Candida haemulonii, Candida duobushaemulonii, non-albicans Candida, antifungal resistance, fluconazole resistance, voriconazole resistance, amphotericin B resistance, caspofungin resistance, micafungin resistance, molecular identification, species-specific PCR, rRNA gene sequencing, clinical isolates, bloodstream infection, emerging fungal pathogens, Kuwait
MeSH terms
Aged, 80 and over, Antifungal Agents, Candida, Candidiasis, Female, Humans, Kuwait, Microbial Sensitivity Tests, Prevalence

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