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Aerobiologia

, Volume 33, Issue 1, pp 127–135 | Cite as

Next-generation sequencing revealed dominant fungal populations in collected dust from selected public school classrooms in Metro Manila

  • Marilen P. Balolong
  • Leslie Michelle M. Dalmacio
  • Mark Lester V. Magabo
  • Diane Nicole L. Sy
  • Arnold V. HallareEmail author
Original Paper

Abstract

Fungal contaminants inside classrooms may increase the chance of health-related problems for school children and teachers, reducing their learning and productivity. Recent initiatives have utilized next-generation sequencing (NGS) technology in order to understand dust ecology and were used to significantly correlate some genera with health-related conditions. To our knowledge, this paper is the first report, describing the fungal community profile of collected dust using 454 pyrosequencing of the ITS region of the 18S rRNA gene from public school classrooms in Metro Manila, Philippines. Culture-dependent technique was done by gravimetric sampling on Sabouraud Dextrose Agar (SDA) to note the importance of existing viable spores present in the rooms. Composite samples of settled dust from each classroom were collected and pooled to represent one sample per school. The fungal ITS rRNA genes amplified from genomic DNA with barcoded primers were sent for pyrosequencing on a 454 GS FLX titanium platform, and sequences were analyzed using the ITScan pipeline. Fungal sequences from the collected dust samples clustered in 108 operational taxonomic units (OTUs), most of which occur as singleton. The number of OTUs that correspond to fungal species varied from 16 to 29 per sample. Rarefaction curves indicated that sampling coverage was partial and that the remaining fraction of the species diversity remains to be discovered. Genera that were detected by both NGS and by cultivation on SDA include Alternaria, Aspergillus, Cladosporium and Penicillium.

Keywords

Dust Fungi Public school classroom Pyrosequencing ITS 

Notes

Acknowledgments

The authors would like to thank the University of the Philippines for funding this investigation through its Enhanced Creative and Writing Research Grant (UP-ECWRG). We are also thankful to the school heads of the different public schools for granting us permission to obtain dust samples from their classrooms, which were utilized in the present study.

Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interests.

Supplementary material

10453_2016_9455_MOESM1_ESM.pdf (143 kb)
Supplementary material 1 (PDF 143 kb)

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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • Marilen P. Balolong
    • 1
    • 2
  • Leslie Michelle M. Dalmacio
    • 3
  • Mark Lester V. Magabo
    • 1
  • Diane Nicole L. Sy
    • 1
  • Arnold V. Hallare
    • 1
    Email author
  1. 1.Department of Biology, College of Arts and SciencesUniversity of the Philippines ManilaManilaPhilippines
  2. 2.Laboratory of Industrial Microbiology and Biotechnology, School of Bio-Resources ScienceDankook UniversityYonginRepublic of Korea
  3. 3.Department of Biochemistry and Molecular Biology, College of MedicineUniversity of the Philippines ManilaManilaPhilippines

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