University of Leicester
Browse

Positive sputum fungal culture, fungal sensitisation and airway microbial diversity in asthmatic children

Download (53.11 kB)
journal contribution
posted on 2025-02-03, 11:19 authored by Paul J Seear, Kathryn G. Welsh, Jack Satchwell, Deepa PatelDeepa Patel, Catherine H. Pashley, Andrew J. Wardlaw, Erol GaillardErol Gaillard

Sensitisation to thermotolerant fungi such as Aspergillus fumigatus and Candida albicans which can colonise the airways is associated with poor lung function in children with asthma. Dysbiosis of bacteria and fungi in the airway microbiome has been reported between health and asthma but has yet to be characterised for fungal sensitised asthmatic children. We investigated if microbial diversity of the airways is altered in fungal sensitised school-age asthmatic children. Sputum samples from children with asthma who were fungal sensitised (n=22) and non-fungal sensitised (n=17) along with children without asthma (n=15), aged 5-16 years were profiled by traditional microbiological culture, modified fungal culture, bacterial 16S and fungal ITS2 next generation sequencing. Microbiota were compared between groups using alpha/beta diversity and differential abundance analysis. Bacterial alpha diversity was significantly lower in asthma compared to disease controls and in stable compared to acute asthma. Fungal alpha and beta diversity did not change between asthma states and disease controls, but alpha diversity was significantly lower in asthma samples from patients with positive A. fumigatus culture. Children sensitised to fungi had similar microbial diversity compared to non-sensitised children. However, in children not sensitised to fungi, those with a positive airway fungal culture had significantly lower fungal alpha diversity and bacterial beta differences compared to children with negative fungal culture. Fungal sensitisation did not alter bacterial or fungal microbiota in the airways of asthmatic children. However, positive airway fungal culture was associated with significant changes in microbial diversity, particularly in non-fungal sensitised children with asthma.

History

Author affiliation

College of Life Sciences Respiratory Sciences

Version

  • AM (Accepted Manuscript)

Published in

Medical Mycology

Publisher

Oxford University Press (OUP)

issn

1369-3786

eissn

1460-2709

Copyright date

2025

Available date

2025-02-03

Language

en

Deposited by

Dr Erol Gaillard

Deposit date

2025-01-23

Usage metrics

    University of Leicester Publications

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC