Publication: PCR-Based diagnosis of neoscytalidium dimidiatum infection using internal transcribed spacer 1 region of ribosomal DNA primers
Issued Date
2018-01-01
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22288082
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2-s2.0-85051582208
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Mahidol University
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SCOPUS
Bibliographic Citation
Siriraj Medical Journal. Vol.70, No.1 (2018), 28-35
Suggested Citation
Charussri Leeyaphan, Koichi Makimura, Chiaki Yamanishi, Sumanas Bunyaratavej, Carren Hau, Yayoi Tada, Wichit Suthammarak, Supannee Kaewsutthi, Sutasinee Phaitoonwattanakij, Shinichi Watanabe PCR-Based diagnosis of neoscytalidium dimidiatum infection using internal transcribed spacer 1 region of ribosomal DNA primers. Siriraj Medical Journal. Vol.70, No.1 (2018), 28-35. doi:10.14456/smj.2018.6 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/47148
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Title
PCR-Based diagnosis of neoscytalidium dimidiatum infection using internal transcribed spacer 1 region of ribosomal DNA primers
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Abstract
© 2018, Faculty of Medicine Siriraj Hospital, Mahidol University. Objective: To develop N. dimidiatum-specific single PCR-based identification with DNA sequences of nuclear ribosomal internal transcribed spacer (ITS) 1 region primers to facilitate the rapid and accurate detection of N. dimidiatum. Methods: N. dimidiatum-specific PCR primers were designed based on the sequence of the internal transcribed spacer 1 region, which is located between 18S and 5.8S nuclear rDNA. Fungal DNA extracted from common causative species for superficial fungal infection including: 2 strains of N. dimidiatum, 9 species of dermatophyte (DMP) and 25 species of non-dermatophyte (NDM) colonies grown on culture plates were used for PCR analysis. Also, 30 clinical specimens collected from 30 patients clinically diagnosed with fungal nail and feet infection who attended Dermatology clinic Siriraj Hospital during October 2015 to November 2015 were used for PCR assay. Results: Using N. dimidiatum-specific PCR primers, the PCR product was amplified from two standard strains of N. dimidiatum, and there was no amplification from other DMP or NDM species. Regarding sensitivity as lower limit of detection, this PCR method was able to detect 10 pg of N. dimidiatum DNA with ethidium bromide staining and could detect N. dimidiatum in clinical samples. Conclusion: This newly developed N. dimidiatum-specific PCR identification system is rapid, sensitive, and specific. This diagnostic method will facilitate early and accurate diagnosis and accelerate appropriate treatment in patients with N. dimidiatum infection.