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Aspergillus collected in specific indoor settings: their molecular identification and susceptibility pattern

Daniela Simões1,2, Liliana Aranha Caetano3,4, Cristina Veríssimo1

  • 1Infectious Diseases Department, National Institute of Health Dr. Ricardo Jorge , Lisbon, Portugal.

International Journal of Environmental Health Research
|August 14, 2019
PubMed

Insights

This study identified Aspergillus species in indoor environments and found no azole resistance in Aspergillus fumigatus isolates. Understanding Aspergillus epidemiology aids in better risk assessment for respiratory health.

Area of Science:

  • Mycology
  • Environmental Health
  • Molecular Biology

Background:

  • Exposure to Aspergillus conidia is a risk factor for respiratory symptoms.
  • Azole resistance in Aspergillus fumigatus is a growing concern.
  • Indoor Aspergillus contamination requires epidemiological investigation.

Purpose of the Study:

  • To molecularly identify Aspergillus species from indoor environments.
  • To assess the azole susceptibility of Aspergillus section Fumigati isolates.
  • To understand the molecular epidemiology and antifungal susceptibility of indoor Aspergillus.

Main Methods:

  • Molecular identification of Aspergillus species using standard taxonomic methods.
  • Culture of Aspergillus isolates from diverse indoor settings.
  • Antifungal susceptibility testing of Aspergillus fumigatus against itraconazole, voriconazole, and posaconazole.

Main Results:

  • Aspergillus species from sections Fumigati, Nigri, Versicolores, Terrei, Clavati, and Nidulantes were identified.
  • No azole resistance was observed in any of the tested Aspergillus fumigatus isolates.
  • The study characterized the molecular epidemiology and azole susceptibility of Aspergillus section Fumigati in indoor environments.

Conclusions:

  • Indoor Aspergillus species diversity was confirmed.
  • Current Aspergillus fumigatus isolates in the studied environments remain susceptible to common azoles.
  • Further research into Aspergillus epidemiology is crucial for managing respiratory health risks.
Keywords:
AspergillusIndoor airazole resistanceoccupational exposure

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