Identification of Candida auris by Use of the Updated Vitek 2 Yeast Identification System, Version 8.01: a Multilaboratory Evaluation Study. 2019

Georges Ambaraghassi, and Philippe J Dufresne, and Simon F Dufresne, and Émilie Vallières, and José F Muñoz, and Christina A Cuomo, and Elizabeth L Berkow, and Shawn R Lockhart, and Me-Linh Luong
Division of Microbiology, Department of Laboratory Medicine, Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada.

Candida auris is an emerging multidrug-resistant yeast that has been systematically incorrectly identified by phenotypic methods in clinical microbiology laboratories. The Vitek 2 automated identification system (bioMérieux) recently included C. auris in its database (version 8.01). We evaluated the performance of the Vitek 2 YST ID card to identify C. auris and related species. A panel of 44 isolates of Candida species (C. auris, n = 35; Candida haemulonii, n = 5; Candida duobushaemulonii, n = 4) were tested by three different hospital-based microbiology laboratories. Among 35 isolates of C. auris, Vitek 2 yielded correct identification in an average of 52% of tested samples. Low-discrimination (LD) results with an inability to distinguish between C. auris, C. duobushaemulonii, and Candida famata were obtained in an average of 27% of samples. Incorrect identification results were obtained in an average of 21% of samples, the majority (91%) of which were reported as C. duobushaemulonii and the remaining 9% of which were reported as Candida lusitaniae/C. duobushaemulonii. The proportion of correct identification was not statistically different across different centers (P = 0.78). Stratification by genetic clades demonstrated that 100% (n = 8) of the strains of the South American clade were correctly identified compared to 7% (n = 10) and 0% (n = 4) from the African and East Asian clades, respectively. None of the non-auris Candida strains (n = 9) were incorrectly identified as C. auris Our results show that the Vitek 2 (version 8.01) yeast identification system has a limited ability to correctly identify C. auris These data suggest that an identification result for C. duobushaemulonii should warrant further testing to rule out C. auris The overall performance of the Vitek 2 seems to differ according to C. auris genetic clade, with the South American isolates yielding the most accurate results.

UI MeSH Term Description Entries
D010641 Phenotype The outward appearance of the individual. It is the product of interactions between genes, and between the GENOTYPE and the environment. Phenotypes
D002170 Canada The largest country in North America, comprising 10 provinces and three territories. Its capital is Ottawa.
D002175 Candida A genus of yeast-like mitosporic Saccharomycetales fungi characterized by producing yeast cells, mycelia, pseudomycelia, and blastophores. It is commonly part of the normal flora of the skin, mouth, intestinal tract, and vagina, but can cause a variety of infections, including CANDIDIASIS; ONYCHOMYCOSIS; VULVOVAGINAL CANDIDIASIS; and CANDIDIASIS, ORAL (THRUSH). Candida guilliermondii var. nitratophila,Candida utilis,Cyberlindnera jadinii,Hansenula jadinii,Lindnera jadinii,Monilia,Pichia jadinii,Saccharomyces jadinii,Torula utilis,Torulopsis utilis,Monilias
D002177 Candidiasis Infection with a fungus of the genus CANDIDA. It is usually a superficial infection of the moist areas of the body and is generally caused by CANDIDA ALBICANS. (Dorland, 27th ed) Candida Infection,Moniliasis,Candida Infections,Candidiases,Infection, Candida,Moniliases
D006761 Hospitals Institutions with an organized medical staff which provide medical care to patients. Hospital
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D057205 Automation, Laboratory Controlled operations of analytic or diagnostic processes, or systems by mechanical or electronic devices. Laboratory Automation
D019411 Clinical Laboratory Techniques Techniques used to carry out clinical investigative procedures in the diagnosis and therapy of disease. Clinical Laboratory Test,Clinical Laboratory Testing,Clinical Laboratory Diagnoses,Clinical Laboratory Testings,Clinical Laboratory Tests,Diagnoses and Laboratory Examinations,Diagnosis, Laboratory,Laboratory Diagnosis,Laboratory Examinations and Diagnoses,Laboratory Techniques, Clinical,Clinical Laboratory Technique,Diagnose, Clinical Laboratory,Laboratory Diagnoses,Laboratory Technique, Clinical,Laboratory Test, Clinical,Laboratory Testing, Clinical,Technique, Clinical Laboratory,Test, Clinical Laboratory,Testing, Clinical Laboratory

Related Publications

Georges Ambaraghassi, and Philippe J Dufresne, and Simon F Dufresne, and Émilie Vallières, and José F Muñoz, and Christina A Cuomo, and Elizabeth L Berkow, and Shawn R Lockhart, and Me-Linh Luong
July 2022, New microbes and new infections,
Georges Ambaraghassi, and Philippe J Dufresne, and Simon F Dufresne, and Émilie Vallières, and José F Muñoz, and Christina A Cuomo, and Elizabeth L Berkow, and Shawn R Lockhart, and Me-Linh Luong
September 1990, Journal of clinical microbiology,
Georges Ambaraghassi, and Philippe J Dufresne, and Simon F Dufresne, and Émilie Vallières, and José F Muñoz, and Christina A Cuomo, and Elizabeth L Berkow, and Shawn R Lockhart, and Me-Linh Luong
January 2014, Revista Argentina de microbiologia,
Georges Ambaraghassi, and Philippe J Dufresne, and Simon F Dufresne, and Émilie Vallières, and José F Muñoz, and Christina A Cuomo, and Elizabeth L Berkow, and Shawn R Lockhart, and Me-Linh Luong
November 2008, Journal of clinical microbiology,
Georges Ambaraghassi, and Philippe J Dufresne, and Simon F Dufresne, and Émilie Vallières, and José F Muñoz, and Christina A Cuomo, and Elizabeth L Berkow, and Shawn R Lockhart, and Me-Linh Luong
May 2000, Journal of clinical microbiology,
Georges Ambaraghassi, and Philippe J Dufresne, and Simon F Dufresne, and Émilie Vallières, and José F Muñoz, and Christina A Cuomo, and Elizabeth L Berkow, and Shawn R Lockhart, and Me-Linh Luong
January 1997, Mycoses,
Georges Ambaraghassi, and Philippe J Dufresne, and Simon F Dufresne, and Émilie Vallières, and José F Muñoz, and Christina A Cuomo, and Elizabeth L Berkow, and Shawn R Lockhart, and Me-Linh Luong
April 2007, Journal of clinical microbiology,
Georges Ambaraghassi, and Philippe J Dufresne, and Simon F Dufresne, and Émilie Vallières, and José F Muñoz, and Christina A Cuomo, and Elizabeth L Berkow, and Shawn R Lockhart, and Me-Linh Luong
May 2018, Journal of clinical microbiology,
Georges Ambaraghassi, and Philippe J Dufresne, and Simon F Dufresne, and Émilie Vallières, and José F Muñoz, and Christina A Cuomo, and Elizabeth L Berkow, and Shawn R Lockhart, and Me-Linh Luong
May 1994, Journal of clinical microbiology,
Georges Ambaraghassi, and Philippe J Dufresne, and Simon F Dufresne, and Émilie Vallières, and José F Muñoz, and Christina A Cuomo, and Elizabeth L Berkow, and Shawn R Lockhart, and Me-Linh Luong
December 1994, Journal of clinical microbiology,
Copied contents to your clipboard!