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‘Breathing Fire’: Impact of Prolonged Bushfire Smoke Exposure in People with Severe Asthma

Authors :
Gibson, Tesfalidet Beyene
Erin S. Harvey
Joseph Van Buskirk
Vanessa M. McDonald
Megan E. Jensen
Jay C. Horvat
Geoffrey G. Morgan
Graeme R. Zosky
Edward Jegasothy
Ivan Hanigan
Vanessa E. Murphy
Elizabeth G. Holliday
Anne E. Vertigan
Matthew Peters
Claude S. Farah
Christine R. Jenkins
Constance H. Katelaris
John Harrington
David Langton
Philip Bardin
Gregory P. Katsoulotos
John W. Upham
Jimmy Chien
Jeffrey J. Bowden
Janet Rimmer
Rose Bell
Peter G.
Source :
International Journal of Environmental Research and Public Health; Volume 19; Issue 12; Pages: 7419
Publication Year :
2022
Publisher :
Multidisciplinary Digital Publishing Institute, 2022.

Abstract

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.

Details

Language :
English
ISSN :
16604601
Database :
OpenAIRE
Journal :
International Journal of Environmental Research and Public Health; Volume 19; Issue 12; Pages: 7419
Accession number :
edsair.multidiscipl..95572ed0ca9e08451a31d1d5957cd681
Full Text :
https://doi.org/10.3390/ijerph19127419