Open Access
CC BY-NC-ND 4.0 · J Lab Physicians 2021; 13(03): 245-251
DOI: 10.1055/s-0041-1731111
Original Article

Strain Typing of Trichosporon asahii Clinical Isolates by Random Amplification of Polymorphic DNA (RAPD) Analysis

Thayanidhi Premamalini
1   Department of Microbiology, Sri Ramachandra Medical College & Research Institute, SRIHER, Porur, Chennai, Tamil Nadu, India
,
Vijayaraman Rajyoganandh
2   Department of Microbiology, Vels Institute of Science, Technology and Advanced Studies, Vels Institute, Chennai, Tamil Nadu, India
,
Ramaraj Vijayakumar
1   Department of Microbiology, Sri Ramachandra Medical College & Research Institute, SRIHER, Porur, Chennai, Tamil Nadu, India
,
Hemanth Veena
1   Department of Microbiology, Sri Ramachandra Medical College & Research Institute, SRIHER, Porur, Chennai, Tamil Nadu, India
,
Anupma Jyoti Kindo
1   Department of Microbiology, Sri Ramachandra Medical College & Research Institute, SRIHER, Porur, Chennai, Tamil Nadu, India
,
Rungmei SK Marak
3   Department of Microbiology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
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Abstract

Objective The aim of this study was to identify and isolate Trichosporon asahii (T. asahii) from clinical samples and to assess the genetic relatedness of the most frequently isolated strains of T. asahii using random amplification of polymorphic DNA (RAPD) primers GAC-1 and M13.

Methods All the clinical samples that grew Trichosporon species, identified and confirmed by polymerase chain reaction (PCR) using Trichosporon genus-specific primers, were considered for the study. Confirmation of the species T. asahii was carried out by T. asahii-specific PCR. Fingerprinting of the most frequently isolated T. asahii isolates was carried out by RAPD using random primers GAC-1 and M13.

Results Among the 72 clinical isolates of Trichosporon sp. confirmed by Trichosporon-specific PCR, 65 were found to be T. asahii as identified by T. asahii-specific PCR. Fingerprinting of the 65 isolates confirmed as T. asahii using GAC-1 RAPD primer yielded 11 different patterns, whereas that of M13 primer produced only 5 patterns. The pattern I was found to be the most predominant type (29.2%) followed by pattern III (16.9%) by GAC-1 primer.

Conclusions This study being the first of its kind in India on strain typing of T. asahii isolates by adopting RAPD analysis throws light on genetic diversity among the T. asahii isolates from clinical samples. Fingerprinting by RAPD primer GAC-1 identified more heterogeneity among the T. asahii isolates than M13.



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Artikel online veröffentlicht:
02. Juli 2021

© 2021. The Indian Association of Laboratory Physicians. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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