Different efficacies of common disinfection methods against candida auris and other candida species

Leiwen Fu1, Tingting Le2, Zhihua Liu3

  • 1Department of Epidemiology, School of Public Health, Southern Medical University, Guangzhou, China.

Abstract

Insights

Effective disinfection against Candida auris involves specific protocols. Washing skin with soap, drying, and applying an ethanol-based gel eradicates C. auris, while UV-C and ozone require extended exposure times for optimal results.

Area of Science:

  • Infectious Diseases
  • Microbiology
  • Hospital Infection Control

Background:

  • Candida auris forms persistent colonies on surfaces and skin, posing a significant hospital infection risk.
  • Limited data exists on effective disinfection strategies for C. auris in healthcare settings and on patients.

Purpose of the Study:

  • To evaluate the efficacy of various disinfectants and methods against Candida auris.
  • To determine optimal disinfection protocols for C. auris on skin and environmental surfaces.

Main Methods:

  • Minimum inhibitory concentrations of disinfectants (including "84" disinfectant, IodineTincture, quaternary ammonium, and 75% ethanol) against Candida species were determined.
  • A pig skin model assessed hand hygiene product efficacy; UV-C and ozone disinfection effects on C. auris were also evaluated.

Main Results:

  • Complete eradication of C. auris on pig skin was achieved with 30s soap wash, drying, and 15s ethanol-based gel application.
  • UV-C efficacy against C. auris on bed sheets decreased significantly at 1m distance.
  • Ozone effectively eradicated C. auris on bed sheets at 300 mg/m³ for 40 min, though C. auris showed higher ozone resistance.

Conclusions:

  • Extended disinfection times for UV-C and ozone are recommended.
  • Emphasize skin disinfection using soap, drying, and ethanol-based gel for C. auris removal.

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