PreprintCited by 463Antifungal resistance and susceptibilityYeasts and Rust Fungi StudiesFungal and yeast genetics research

Tracing the evolutionary history and global expansion of Candida auris using population genomic analyses

Open access
Chow, Nancy A., Muñoz, José F., Gade, Lalitha, Berkow, Elizabeth, Li, Xiao, Welsh, Rory M., Forsberg, Kaitlin, Lockhart, Shawn R. +17 more·2020·mBio

Preprint — published as 10.1128/mbio.03364-19 · Paper page

Abstract

Candida auris has emerged globally as a multidrug-resistant yeast that can spread via nosocomial transmission. An initial phylogenetic study of isolates from Japan, India, Pakistan, South Africa, and Venezuela revealed four populations (Clades I, II, III, and IV) corresponding to these geographic regions. Since this description, C. auris has been reported in over 30 additional countries. To trace this global emergence, we compared the genomes of 304 C. auris isolates from 19 countries on six continents. We found that four predominant clades persist across wide geographic locations. We observed phylogeographic mixing in most clades; Clade IV, with isolates mainly from South America, demonstrated the strongest phylogeographic substructure. C. auris isolates from two clades with opposite mating types were detected contemporaneously in a single healthcare facility in Kenya. We estimated a Bayesian molecular clock phylogeny and dated the origin of each clade within the last 339 years; outbreak-causing clusters from Clades I, III, and IV originated 34-35 years ago. We observed high rates of antifungal resistance in Clade I, including four isolates resistant to all three major classes of antifungals. Mutations that contribute to resistance varied between the clades, with Y132F in ERG11 as the most widespread mutation associated with azole resistance and S639P in FKS1 for echinocandin resistance. Copy number variants in ERG11 predominantly appeared in Clade III and were associated with fluconazole resistance. These results provide a global context for the phylogeography, population structure, and mechanisms associated with antifungal resistance in C. auris . Importance: In less than a decade, C. auris has emerged in healthcare settings worldwide; this species is capable of colonizing skin and causing outbreaks of invasive candidiasis. In contrast to other Candida species, C. auris is unique in its ability to spread via nosocomial transmission and its high rates of drug resistance. As part of the public health response, whole-genome sequencing has played a major role in characterizing transmission dynamics and detecting new C. auris introductions. Through a global collaboration, we assessed genome evolution of isolates of C. auris from 19 countries. Here, we described estimated timing of the expansion of each C. auris clade and of fluconazole resistance, characterized discrete phylogeographic population structure of each clade, and compared genome data to sensitivity measurements to describe how antifungal resistance mechanisms vary across the population. These efforts are critical for a sustained, robust public health response that effectively utilizes molecular epidemiology.

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Authors
Chow, N. A., Muñoz, J. F., Gade, L., Berkow, E., Li, X., Welsh, R. M., Forsberg, K., Lockhart, S. R., Adam, R., Alanio, A., Alastruey-Izquierdo, A., Althawadi, S., Belén Araúz, A., Ben-Ami, R., Bharat, A., Calvo, B., Desnos-Ollivier, M., Escandón, P., Gardam, D., Gunturu, R., Heath, C. H., Kurzai, O., Martin, R., Litvintseva, A. P., & Cuomo, C. A.
Affiliations
  • Centers for Disease Control and Prevention (US)
  • Broad Institute (US)
  • Aga Khan University Hospital Nairobi (KE)
  • Centre National de la Recherche Scientifique (FR)
  • King Faisal Specialist Hospital & Research Centre (SA)
  • Public Health Agency of Canada (CA)
  • Universidad del Zulia (VE)
  • Instituto Nacional de Salud (CO)
  • Fiona Stanley Hospital (AU)
  • The University of Western Australia (AU)
  • University of Würzburg (DE)
Corresponding author
  • Litvintseva, Anastasia P.
  • Cuomo, Christina A.
Venue
mBio
Publisher
openRxiv
Published
2020-01-07
Volume
11
Issue
2
Pages
e03364-19
ISSN
2150-7511 (ISSN-L)
OpenAlex
W3020256411
Cited by
463
References
57
Citations by year
2026: 76 · 2025: 86 · 2024: 81 · 2023: 80 · 2022: 64 · 2021: 52 · 2020: 24
FWCI
7.21
Type
journal article
Language
en
Open access
Locations
  • mBio (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • UWA Profiles and Research Repository (UWA) (publishedVersion, other-oa)
  • PubMed (publishedVersion)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, cc-by-nc-sa)
  • eCommons - AKU (Aga Khan University) (submittedVersion)
  • HAL (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Greater South Information System
Funders
  • U.S. Department of Health and Human Services (U19-AI110818)
  • Canadian Institute for Advanced Research
  • Broad Institute (U19AI110818)
  • National Institutes of Health
  • Centers for Disease Control and Prevention (U19AI110818)
  • National Institute of Allergy and Infectious Diseases (U19AI110818)
Topics
  • Health Sciences › Medicine › Infectious Diseases › Antifungal resistance and susceptibility
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Yeasts and Rust Fungi Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
Keywords
Candida auris, evolutionary history, international expansion, phylogeography, fluconazole resistance, antifungal resistance, nosocomial transmission, invasive candidiasis, molecular epidemiology, population structure, whole genome sequencing
MeSH terms
Whole Genome Sequencing, Antifungal Agents, Azoles, Candida, Biological Evolution, Genes, Fungal, Genetics, Population, Humans, Mutation, Phylogeny, Fluconazole, Genome, Fungal, Molecular Epidemiology, Drug Resistance, Fungal, Echinocandins, Metagenomics, Candidiasis, Invasive, Phylogeography

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