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Issatchenkia orientalis Kudrjanzev (ATCC® 6258)

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Alternate State: Candida krusei (Castellani) Berkhout  /  Strain Designations: [ATCC 749, CBS 573, CCRC 20514, IFO 1064, IFO 1395, JCM 1609, NBRC 1395, NRRL Y-413, NRRL Y-7179]  /  Product Format: freeze-dried

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Deposited As Candida krusei (Castellani) Berkhout
Verified By Whole-genome Sequencing
Classification Fungi, Ascomycota, Saccharomycotina, Saccharomycetes, Saccharomycetidae, Saccharomycetales, Saccharomycetaceae, Issatchenkia
Strain Designations [ATCC 749, CBS 573, CCRC 20514, IFO 1064, IFO 1395, JCM 1609, NBRC 1395, NRRL Y-413, NRRL Y-7179]
Alternate State Candida krusei (Castellani) Berkhout
Assay of itraconzaole
Assay of ketoconazole
Quality control
Quality control strain
Sterility testing
Susceptibility disc testing
Susceptibility testing
Quality control strain for API products
Antifungal susceptibility testing RefGhannoum MA, et al. Interlaboratory study of quality control isolates for a broth microdilution method (modified CLSI M38-A) for testing susceptibilities of dermatophytes to antifungals. J. Clin. Microbiol. 44: 4353-4356, 2006. RefEspinel-Ingroff A, et al. Quality control and reference guidelines for CLSI broth microdilution susceptibility method (M38-A document) for amphotericin B, itraconazole, posaconazole, and voriconazole. J. Clin. Microbiol. 43: 5243-5246, 2005.
Biosafety Level 1

Biosafety classification is based on U.S. Public Health Service Guidelines, it is the responsibility of the customer to ensure that their facilities comply with biosafety regulations for their own country.

Product Format freeze-dried
Storage Conditions Frozen: -80°C or colder
Freeze-Dried: 2°C to 8°C
Live Culture: See Propagation Section
Type Strain yes (type strain of Candida krusei)
Preceptrol® yes
Comments Esterase activity
RAPD profiles
This organism is a CLSI control strain for antimicrobial susceptibility testing.
The current name of Candida krusei and Issatchenkia orientalis is Pichia kudriavzevii Boidin et al.
Medium ATCC® Medium 200: YM agar or YM broth
ATCC® Medium 28: Emmons' modification of Sabouraud's agar
ATCC® Medium 1245: YEPD
Growth Conditions
Temperature: 25°C to 30°C
Atmosphere: Typical aerobic
Sequenced Data
18S ribosomal RNA gene, partial sequence; internal transcribed spacer 1, 5.8S ribosomal RNA gene, and internal transcribed spacer 2, complete sequence; and 26S ribosomal RNA gene, partial sequence


D1D2 region of the 26S ribosomal RNA gene


Name of Depositor A Castellani
Sputum of patient with bronchomycosis, Sri Lanka
Cross References

Nucleotide (GenBank) : AX109706 Sequence 439 from Patent WO0123604.

Nucleotide (GenBank) : M60305 C. krusei small subunit ribosomal RNA.

Nucleotide (GenBank) : S75391 cytochrome P-450 lanosterol-alpha-demethylase [Issatchenkia

Nucleotide (GenBank) : AF250036 Issatchenkia orientalis strain ATCC 6258 ABC transporter Abc1p

Nucleotide (GenBank) : AF250037 Issatchenkia orientalis strain ATCC 6258 ABC transporter Abc2p

Nucleotide (GenBank) : KC601852 ITS including 5.8S rRNA gene

Nucleotide (GenBank) : KC601854 D1/D2 region of 28S rRNA gene


Rudek W. Esterase activity in Candida species. J Clin Microbiol 8: 756-759, 1978. PubMed: 370150

Zeng S, et al. Random amplified polymorphic DNA analysis of culture collection strains of Candida species. J Med Vet Mycol 34: 293-297, 1996. PubMed: 8873891

Castellani AJ. Note on the importance of hyphomycetes and other fungi in tropical pathology. Br. Med. J. 2: 1208-1212, 1912.

Brenner DJ, et al. Multisite reproducibility of colorimetric broth microdilution method for antifungal susceptibility testing of yeast isolates. J Clin Microbiol 32: 1625-1628, 1994. PubMed: 7929747

Pfaller MA, et al. Selection of candidate quality control isolates and tentative quality control ranges for in vitro susceptibility testing of yeast isolates by National Committee for Clinical Laboratory Standards proposed standard methods. J Clin Microbiol 32: 1650-1653, 1994. PubMed: 7929752

Espinel-Ingroff A, et al. Comparison of two alternative microdilution procedures with the National Committee for Clinical Laboratory Standards reference macrodilution method M27-P for in vitro testing of fluconazole-resistant and -susceptible isolates of Candida albicans. J Clin Microbiol 33: 3154-3158, 1995. PubMed: 8586692

Rex JH, et al. Quality control guidelines for National Committee for Clinical Laboratory Standards--recommended broth macrodilution testing of ketoconazole and itraconazole. J. Clin. Microbiol. 34: 816-817, 1996. PubMed: 8815089

Davey KG, et al. Comparative evaluation of FUNGITEST and broth microdilution methods for antifungal drug susceptibility testing of Candida species and Cryptococcus neoformans. J Clin Microbiol 36: 926-930, 1998. PubMed: 9542910

Sensititre™ YeastOne. Thermo Scientific™ Sensititre™ Systems, Trek Diagnostic Systems.

Quality Control MIC Limits for Broth Microdilution Informational Supplement. Wayne, PA. Clinical and Laboratory Standards Institute; CLSI M27-S3.

Method for Antifungal Disk Diffusion Susceptibility Testing of Yeast; Approved Guideline. Wayne, PA. Clinical and Laboratory Standards Institute; CLSI M44-A2.

Supplemental assay method for testing growth promoting qualities of fluid thioglycollate medium and soybean-casein digest medium using Bacillus Subtilis spores and Candida krusei as the indicator organisms. :US Department of Agriculture;USDA, Center for Veterinary Biologics STSAM0900.01, 1999

Supplemental assay method for testing growth-promoting qualities of brain heart infusion agar using Bacillus subtilis spores and Candida krusei as indicator organisms. :US Department of Agriculture;USDA, Center for Veterinary Biologics STSAM0902.01, 1999

Supplemental assay method for testing for preservative interference with sterility tests. :US Department of Agriculture;USDA, Center for Veterinary Biologics STSAM0903.01, 1999

Medical microbiology--Susceptibility testing of microbial pathogens to antimicrobial agents -- Part 84: Microdilution; Special requirements for testing of fungi against antifungal agents. Berlin, Germany:Deutsches Institut fur Normung;DIN DIN 58940-84: 2002, 2002

VITEK 2 Antifungal AST Card. bioMerieux.

Reference Method for Broth Dilution Antifungal Susceptibility Testing of Filamentous Fungi: Approved Standard - 2nd Edition. Wayne, PA. Clinical and Laboratory Standards Institute; CLSI M38-A2.

VITEK 2 AST-YS QC Set. bioMerieux.

Ghannoum MA, et al. Interlaboratory study of quality control isolates for a broth microdilution method (modified CLSI M38-A) for testing susceptibilities of dermatophytes to antifungals. J. Clin. Microbiol. 44: 4353-4356, 2006.

Tsui CK, et al. Re-examining the phylogeny of clinically relevant Candida species and allied genera based on multigene analyses. FEMS Yeast Res. 8: 651-659, 2008. PubMed: 18248416

Borman AM, et al. Candida nivariensis, an emerging pathogenic fungus with multidrug resistance to antifungal agents. J. Clin. Microbiol. 46: 933-938, 2008. PubMed: 18199788

Kahn JN, et al. Acquired echinocandin resistance in a Candida krusei isolate due to modification of glucan synthase. Antimicrob. Agents Chemother. 51: 1876-1878, 2007. PubMed: 17325225

Innings A, et al. Multiplex real-time PCR targeting the RNase P RNA gene for detection and identification of Candida species in blood. J Clin Microbiol 45: 874-880, 2007. PubMed: 17215340

Park S, et al. Specific substitutions in the echinocandin target Fks1p account for reduced susceptibility of rare laboratory and clinical Candida sp. isolates. Antimicrob. Agents Chemother. 49: 3264-3273, 2005. PubMed: 16048935

type strain of Candida krusei

Notice: Necessary PermitsPermits

These permits may be required for shipping this product:

  • Customers located in the state of Hawaii will need to contact the Hawaii Department of Agriculture to determine if an Import Permit is required. A copy of the permit or documentation that a permit is not required must be sent to ATCC in advance of shipment.
Basic Documentation
Other Documentation
  1. Accessing genome sequencing data

    Date Updated: 9/30/2019

  2. Criteria for reference quality genomes

    Date Updated: 9/30/2019