Susceptibility profile of echinocandins, azoles and amphotericin B against yeast phase of Talaromyces marneffei isolated from HIV-infected patients in Guangdong, China

  • H.-L. Lei
  • L.-H. Li
  • W.-S. Chen
  • W.-N. Song
  • Y. He
  • F.-Y. Hu
  • X.-J. Chen
  • W.-P. Cai
  • X.-P. Tang
Original Article
  • 66 Downloads

Abstract

Talaromyces marneffei (T. marneffei) can cause talaromycosis, a fatal systemic mycosis, in patients with AIDS. With the increasing number of talaromycosis cases in Guangdong, China, we aimed to investigate the susceptibility of 189 T. marneffei clinical strains to eight antifungal agents, including three echinocandins (anidulafungin, micafungin, and caspofungin), four azoles (posaconazole, itraconazole, voriconazole, and fluconazole), and amphotericin B, with determining minimal inhibition concentrations (MIC) by Sensititre YeastOne™ YO10 assay in the yeast phase. The MICs of anidulafungin, micafungin, caspofungin, posaconazole, itraconazole, voriconazole, fluconazole, and amphotericin B were 2 to > 8 μg/ml, >8 μg/ml, 2 to > 8 μg/ml, ≤ 0.008 to 0.06 μg/ml, ≤ 0.015 to 0.03 μg/ml, ≤ 0.008 to 0.06 μg/ml, 1 to 32 μg/ml, and ≤ 0.12 to 1 μg/ml, respectively. The MICs of all echinocandins were very high, while the MICs of posaconazole, itraconazole, and voriconazole, as well as amphotericin B were comparatively low. Notably, fluconazole was found to have a higher MIC than other azoles, and exhibited particularly weak activity against some isolates with MICs over 8 μg/ml. Our data in vitro support the use of amphotericin B, itraconazole, voriconazole, and posaconazole in management of talaromycosis and suggest potential resistance to fluconazole.

Keywords

Antifungal susceptibility Talaromyces marneffei HIV positive Echinocandin Azole Sensititre YeastOne 

Notes

Acknowledgements

We thank Thomas Fitzpatrick (University of Washington School of Medicine) for the language organization and editing.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical statement and informed consent

This study was approved by the institutional review board of Guangzhou Eighth People’s Hospital, which contained only sub-cultured clinical T. marneffei isolates and all patient information were anonymised. Informed consent was not required in this work.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • H.-L. Lei
    • 1
  • L.-H. Li
    • 2
  • W.-S. Chen
    • 3
  • W.-N. Song
    • 3
  • Y. He
    • 4
  • F.-Y. Hu
    • 1
  • X.-J. Chen
    • 2
  • W.-P. Cai
    • 2
  • X.-P. Tang
    • 1
  1. 1.Research Institute of Infectious Diseases, Guangzhou Eighth People’s HospitalGuangzhou Medical UniversityGuangzhouPeople’s Republic of China
  2. 2.Department of Infectious Diseases, Guangzhou Eighth People’s HospitalGuangzhou Medical UniversityGuangzhouPeople’s Republic of China
  3. 3.Department of Clinical Laboratory, Guangzhou Eighth People’s HospitalGuangzhou Medical UniversityGuangzhouPeople’s Republic of China
  4. 4.Department of Medical UltrasonicsGuangzhou First People’s HospitalGuangzhouPeople’s Republic of China

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