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Year : 2018  |  Volume : 20  |  Issue : 1  |  Page : 19-21

Comparative evaluation of sensititre yeast one panel against broth microdilution method for testing Candida auris and Candida haemulonii susceptibility: A pilot study

Department of Microbiology, Sri Ramachandra Medical College and Research Centre, Chennai, Tamil Nadu, India

Correspondence Address:
Dr. Anupma Jyoti Kindo
Department of Microbiology, Sri Ramachandra Medical College and Research Centre, Porur, Chennai - 600 116, Tamil Nadu
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jacm.jacm_22_17

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BACKGROUND: Candidal infection due to non-Candida albicans is on the rise and implicated to cause significant morbidity and mortality. Although empirical treatment can be provided, the sensitivity pattern varies drastically in different species of Candida. The conventional broth microdilution method for antifungal susceptibility is labour intensive. Data on antifungal susceptibility testing (AFST) by colorimetric yeast one sensititre method are available for many Candida species but not for Candida auris and Candida haemulonii. AIM: The utility of colorimetric yeast one plate was compared to conventional broth microdilution method (CLSI M27-A3 guidelines) for five isolates each of C. haemulonii and C. auris along with CLSI quality control strain Candida krusei ATCC 6258. MATERIALS AND METHODS: A total of 10 isolates of C. auris/haemulonii, confirmed by sugar assimilation and DNA sequencing were chosen. AFST was performed by conventional broth microdilution and colorimetric yeast one sensititre plates. STATISTICAL ANALYSIS: The analysis was performed by Carl Pearson's correlation coefficient. RESULTS: All isolates showed high MIC (>64 μg/mL) for Fluconazole by both methods. Strains of C. auris were found to have high MIC (>64 μg/mL) for Amphotericin B by conventional method. The degree of agreement between the two methods was 100%, 96.83% and 90.03% for Fluconazole, Posaconazole and Itraconazole, respectively, for the 10 isolates. The degree of agreement was 100%, 95.70% and 93.83% and 100%, 97.97% and 86.24% for Fluconazole, Posaconazole and Itraconazole for C. auris and C. haemulonii, respectively. CONCLUSION: AFST by colorimetric yeast one plate is less time-consuming, easy to perform and interpret, however further studies with a large number of isolates are required to test Echinocandins and Amphotericin B.

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