TY - JOUR
T1 - ‘Breathing Fire’
T2 - Impact of Prolonged Bushfire Smoke Exposure in People with Severe Asthma
AU - Beyene, Tesfalidet
AU - Harvey, Erin S.
AU - Van Buskirk, Joseph
AU - McDonald, Vanessa M.
AU - Jensen, Megan E.
AU - Horvat, Jay C.
AU - Morgan, Geoffrey G.
AU - Zosky, Graeme R.
AU - Jegasothy, Edward
AU - Hanigan, Ivan
AU - Murphy, Vanessa E.
AU - Holliday, Elizabeth G.
AU - Vertigan, Anne E.
AU - Peters, Matthew
AU - Farah, Claude S.
AU - Jenkins, Christine R.
AU - Katelaris, Constance H.
AU - Harrington, John
AU - Langton, David
AU - Bardin, Philip
AU - Katsoulotos, Gregory P.
AU - Upham, John W.
AU - Chien, Jimmy
AU - Bowden, Jeffrey J.
AU - Rimmer, Janet
AU - Bell, Rose
AU - Gibson, Peter G.
PY - 2022/6/16
Y1 - 2022/6/16
N2 - 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 East-ern/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 bush-fire 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 32.5μg/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.
AB - 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 East-ern/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 bush-fire 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 32.5μg/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.
KW - bushfire smoke
KW - particulate matter
KW - severe asthma
KW - wildfire smoke
UR - http://www.scopus.com/inward/record.url?scp=85132038294&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/ARC/LP0882048
UR - http://purl.org/au-research/grants/NHMRC/490057
U2 - 10.3390/ijerph19127419
DO - 10.3390/ijerph19127419
M3 - Article
C2 - 35742668
AN - SCOPUS:85132038294
SN - 1661-7827
VL - 19
JO - International Journal of Environmental Research and Public Health
JF - International Journal of Environmental Research and Public Health
IS - 12
M1 - 7419
ER -
