Ambient Ammonia Exposures in an Agricultural Community and Pediatric Asthma Morbidity

Epidemiology
Christine LoftusCatherine Karr

Abstract

Large-scale animal feeding operations compromise regional air quality in the rural US through emission of pollutants, such as ammonia gas. Exposure to airborne pollution from animal feeding operations may cause pediatric asthma exacerbations in surrounding communities. To describe spatial and temporal patterns in ambient ammonia concentrations in an agricultural region, and to investigate associations between short-term fluctuations in ammonia and subsequent changes in respiratory health in children with asthma. For 13 months in the Yakima Valley of Washington State, 14 monitors sampled ammonia in outdoor air for 24-hour periods every 6 days. School-age children with asthma (n = 51) were followed for two health outcomes: biweekly reports of asthma symptoms and quick relief medication usage, and daily measurements of forced expiratory volume in 1 second. We assessed associations between each outcome and ammonia using generalized estimating equations. Twenty-four-hour ammonia concentrations varied from 0.2 to 238.1 μg/m during the study period and displayed a strong correlation with proximity to animal feeding operations. The percentage of forced expiratory volume in 1 second was 3.8% lower (95% confidence interval = 0.2, 7.3) pe...Continue Reading

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Citations

Oct 31, 2016·International Journal of Hygiene and Environmental Health·Manuella Lech CantuariaVictoria Blanes-Vidal
Apr 1, 2017·International Journal of Environmental Research and Public Health·Sara G RasmussenBrian S Schwartz
May 10, 2017·Current Allergy and Asthma Reports·Robin Dawson Estrada, Dennis R Ownby
Jun 28, 2017·Respirology : Official Journal of the Asian Pacific Society of Respirology·Lakshmi BalakrishnanJoshua Lawson
May 2, 2018·Occupational and Environmental Medicine·Floor BorléeLidwien A M Smit
May 2, 2019·The International Journal of Occupational and Environmental Medicine·Masoud NeghabSaeed Yousefinejad
May 11, 2017·American Journal of Respiratory and Critical Care Medicine·Floor BorléeLidwien A M Smit
May 19, 2021·Pediatrics·Heather L BrumbergUNKNOWN COUNCIL ON ENVIRONMENTAL HEALTH

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