tetano
Editor, Senior Moderator
Environ Int. 2020 Mar 31;139:105668. doi: 10.1016/j.envint.2020.105668. [Epub ahead of print]
The delayed effect of wildfire season particulate matter on subsequent influenza season in a mountain west region of the USA.
Landguth EL[SUP]1[/SUP], Holden ZA[SUP]2[/SUP], Graham J[SUP]3[/SUP], Stark B[SUP]4[/SUP], Mokhtari EB[SUP]5[/SUP], Kaleczyc E[SUP]6[/SUP], Anderson S[SUP]7[/SUP], Urbanski S[SUP]8[/SUP], Jolly M[SUP]9[/SUP], Semmens EO[SUP]10[/SUP], Warren DA[SUP]11[/SUP], Swanson A[SUP]12[/SUP], Stone E[SUP]13[/SUP], Noonan C[SUP]14[/SUP].
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Abstract
Particularly in rural settings, there has been little research regarding the health impacts of fine particulate matter (PM[SUB]2.5[/SUB]) during the wildfire season smoke exposure period on respiratory diseases, such as influenza, and their associated outbreaks months later. We examined the delayed effects of PM[SUB]2.5[/SUB] concentrations for the short-lag (1-4 weeks prior) and the long-lag (during the prior wildfire season months) on the following winter influenza season in Montana, a mountainous state in the western United States. We created gridded maps of surface PM[SUB]2.5[/SUB] for the state of Montana from 2009 to 2018 using spatial regression models fit with station observations and Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol optical thickness data. We used a seasonal quasi-Poisson model with generalized estimating equations to estimate weekly, county-specific, influenza counts for Montana, associated with delayed PM[SUB]2.5[/SUB] concentration periods (short-lag and long-lag effects), adjusted for temperature and seasonal trend. We did not detect an acute, short-lag PM[SUB]2.5[/SUB] effect nor short-lag temperature effect on influenza in Montana. Higher daily average PM[SUB]2.5[/SUB] concentrations during the wildfire season was positively associated with increased influenza in the following winter influenza season (expected 16% or 22% increase in influenza rate per 1 μg/m[SUP]3[/SUP] increase in average daily summer PM[SUB]2.5[/SUB] based on two analyses, p = 0.04 or 0.008). This is one of the first observations of a relationship between PM[SUB]2.5[/SUB] during wildfire season and influenza months later.
Copyright ? 2020 The Authors. Published by Elsevier Ltd.. All rights reserved.
KEYWORDS:
Air pollution; Influenza; MODIS; PM(2.5); Respiratory health; Wildfire Smoke
PMID:32244099DOI:10.1016/j.envint.2020.105668
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The delayed effect of wildfire season particulate matter on subsequent influenza season in a mountain west region of the USA.
Landguth EL[SUP]1[/SUP], Holden ZA[SUP]2[/SUP], Graham J[SUP]3[/SUP], Stark B[SUP]4[/SUP], Mokhtari EB[SUP]5[/SUP], Kaleczyc E[SUP]6[/SUP], Anderson S[SUP]7[/SUP], Urbanski S[SUP]8[/SUP], Jolly M[SUP]9[/SUP], Semmens EO[SUP]10[/SUP], Warren DA[SUP]11[/SUP], Swanson A[SUP]12[/SUP], Stone E[SUP]13[/SUP], Noonan C[SUP]14[/SUP].
Author information
Abstract
Particularly in rural settings, there has been little research regarding the health impacts of fine particulate matter (PM[SUB]2.5[/SUB]) during the wildfire season smoke exposure period on respiratory diseases, such as influenza, and their associated outbreaks months later. We examined the delayed effects of PM[SUB]2.5[/SUB] concentrations for the short-lag (1-4 weeks prior) and the long-lag (during the prior wildfire season months) on the following winter influenza season in Montana, a mountainous state in the western United States. We created gridded maps of surface PM[SUB]2.5[/SUB] for the state of Montana from 2009 to 2018 using spatial regression models fit with station observations and Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol optical thickness data. We used a seasonal quasi-Poisson model with generalized estimating equations to estimate weekly, county-specific, influenza counts for Montana, associated with delayed PM[SUB]2.5[/SUB] concentration periods (short-lag and long-lag effects), adjusted for temperature and seasonal trend. We did not detect an acute, short-lag PM[SUB]2.5[/SUB] effect nor short-lag temperature effect on influenza in Montana. Higher daily average PM[SUB]2.5[/SUB] concentrations during the wildfire season was positively associated with increased influenza in the following winter influenza season (expected 16% or 22% increase in influenza rate per 1 μg/m[SUP]3[/SUP] increase in average daily summer PM[SUB]2.5[/SUB] based on two analyses, p = 0.04 or 0.008). This is one of the first observations of a relationship between PM[SUB]2.5[/SUB] during wildfire season and influenza months later.
Copyright ? 2020 The Authors. Published by Elsevier Ltd.. All rights reserved.
KEYWORDS:
Air pollution; Influenza; MODIS; PM(2.5); Respiratory health; Wildfire Smoke
PMID:32244099DOI:10.1016/j.envint.2020.105668
Free full text