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O40-3Effects of working conditions on airway inflammation in compost workers
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O40-3Effects of working conditions on airway inflammation in compost workers
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Journal Article
O40-3Effects of working conditions on airway inflammation in compost workers
2016
Overview
Rationale and objectivesCompost workers have more airway irritation symptoms and increased inflammation markers than non-exposed workers. We studied which activities and processed wastes are involved.Methods90 compost workers were followed-up for 18 months with a medical examination every 6 months. At each visit, two questionnaires on the preceding six-months, regarding the tasks of a typical work-week and respiratory health and irritation symptoms, were administered. Fractional exhaled nitric oxide (NOe) measures, spirometry and a methacholine challenge test (MCT) were performed. Skin prick-tests for common aeroallergens were performed on the first visit, and immunoglobulin (Ig) E and G specific to airborne microorganisms commonly observed in composting plants were quantified on two visits. ResultsSixty-one subjects (68%) worked in 20 green waste (GW) plants and 29 (32%) in 15 sewage sludge (SS) plants. Thirteen workers (14%) were drivers or mechanics considered as having low exposure. Thirty-seven workers were atopic (42%) and 12 (13%) had ever-asthma. Workers in plants processing the highest quantities of waste had more upper (OR = 7.5, IC95%=[1.3; 42.7]) and lower (OR = 1.05, IC95%=[1.0; 1.1]) airway irritation symptoms and digestive symptoms (OR = 1.23, IC95%=[1.0; 1.5]), and more frequently altered FVC (OR = 1.3, IC95%=[1,1; 1,5]) and FEV1 (OR = 1.2, IC95%=[1.0; 1.4]). Mixing materials (OR = 1.04, IC95%=[1.0; 1.1]) and handling compost (OR = 1.13, IC95%=[1.0; 1; 2]) were tasks associated with more asthma-like symptoms. Cleaning activities were associated with a higher MCT dose-response slope ( beta = -0.010, IC95%=[-0.019; -0.001]). Workers in GW plants had a higher risk of having an increased NOe than workers in SS plants (OR = 45.8, IC95%=[2.6; 808.2]). Less exposed workers had a lower level of IgE specific to actinomycetes (exp( beta )=1.17, IC95%=[1.04; 1.32]). ConclusionThis is the first time the characteristics of the plants, tasks performed and types of waste processed have been linked to markers of airway inflammation and symptoms in compost workers.
