University of Tasmania
Browse

'Breathing Fire': impact of prolonged bushfire smoke exposure in people with severe asthma

Download (1020.87 kB)
journal contribution
posted on 2023-05-21, 14:29 authored by Beyene, T, Harvey, ES, Van Buskirk, J, McDonald, VM, Jensen, ME, Horvat, JC, Morgan, GG, Graeme ZoskyGraeme Zosky, Jegasothy, E, Hanigan, I, Murphy, VE, Holliday, EG, Vertigan, AE, Peters, M, Farah, CS, Jenkins, CR, Katelaris, CH, Harrington, J, Langton, D, Bardin, P, Katsoulotos, GP, Upham, JW, Chien, J, Bowden, JJ, Rimmer, Janet, Bell, R, Gibson, PG
Wildfires are increasing and cause health effects. The immediate and ongoing health impacts of prolonged wildfire smoke exposure in severe asthma are unknown. This longitudinal study examined the experiences and health impacts of prolonged wildfire (bushfire) smoke exposure in adults with severe asthma during the 2019/2020 Australian bushfire period. Participants from Eastern/Southern Australia who had previously enrolled in an asthma registry completed a questionnaire survey regarding symptoms, asthma attacks, quality of life and smoke exposure mitigation during the bushfires and in the months following exposure. Daily individualized exposure to bushfire particulate matter (PM2.5) was estimated by geolocation and validated modelling. Respondents (n = 240) had a median age of 63 years, 60% were female and 92% had severe asthma. They experienced prolonged intense PM2.5 exposure (mean PM2.5 32.5 μg/m3 on 55 bushfire days). Most (83%) of the participants experienced symptoms during the bushfire period, including: breathlessness (57%); wheeze/whistling chest (53%); and cough (50%). A total of 44% required oral corticosteroid treatment for an asthma attack and 65% reported reduced capacity to participate in usual activities. About half of the participants received information/advice regarding asthma management (45%) and smoke exposure minimization strategies (52%). Most of the participants stayed indoors (88%) and kept the windows/doors shut when inside (93%), but this did not clearly mitigate the symptoms. Following the bushfire period, 65% of the participants reported persistent asthma symptoms. Monoclonal antibody use for asthma was associated with a reduced risk of persistent symptoms. Intense and prolonged PM2.5 exposure during the 2019/2020 bushfires was associated with acute and persistent symptoms among people with severe asthma. There are opportunities to improve the exposure mitigation strategies and communicate these to people with severe asthma.

History

Publication title

International Journal of Environmental Research and Public Health

Volume

19

Issue

12

Article number

7419

Number

7419

Pagination

1-15

ISSN

1660-4601

Department/School

Menzies Institute for Medical Research

Publisher

MDPI

Place of publication

Basel

Rights statement

© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/), which permits use, sharing, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Repository Status

  • Open

Socio-economic Objectives

Prevention of human diseases and conditions

Usage metrics

    University Of Tasmania

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC