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Dishwashers as an Extreme Environment of Potentially Pathogenic Yeast Species

Kamila Kulesza1, Anna Biedunkiewicz1, Karolina Nowacka1

  • 1Department of Microbiology and Mycology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1A, 10-719 Olsztyn, Poland.

Pathogens (Basel, Switzerland)
|April 30, 2021
PubMed

Insights

Dishwashers can harbor diverse yeast species, posing potential risks. This study identified six yeast species, with rubber seals being the most common site for microbial growth.

Area of Science:

  • Microbiology
  • Environmental Science
  • Home Appliances

Background:

  • Dishwashers create unique microenvironments.
  • Understanding microbial communities in dishwashers is crucial for hygiene and user safety.

Purpose of the Study:

  • To compare yeast species diversity in dishwashers.
  • To assess potential health risks associated with yeast colonization.

Main Methods:

  • Yeast isolation from ten dishwashers and tap water.
  • Mycological analyses including standard diagnostic procedures.
  • Molecular identification using D1/D2 gene region sequencing.

Main Results:

  • Microfungi detected in 70% of appliances.
  • Rubber seals, detergent dispensers, and drains were highly colonized.
  • Six yeast species identified: Candida parapsilosis, Clavispora lusitaniae, Dipodascus capitatus, Exophiala dermatitidis, Meyerozyma guilliermondii, and Rhodotorula mucilaginosa.

Conclusions:

  • Dishwashers serve as a sufficient ecological niche for microfungi.
  • Specific sites like rubber seals are primary reservoirs for yeast growth.
  • Findings highlight the need for improved dishwasher hygiene.
Keywords:
dishwashersfungimicrofungipotential pathogens

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