Impact on Air Quality and Workers’ Health of Alternative Housing Systems for Laying Hens Abstract Every day, egg producers whose barns are equipped with conventional housing systems are exposed to substantial quantities of bioaerosols that are harmful to their respiratory health. Since 2017, the Code of Practice for the Care and Handling of Pullets and Laying Hens has obliged Canadian egg producers to replace traditional cages with alternative housing systems to promote well-being and natural behaviours in laying hens. The presence of litter, the hens’ increased freedom of movement and the management of manure and flocks associated with alternative housing could have an impact on air quality and bioburden (suspended particles such as bioaerosols).A new study funded by the IRSST plans to assess air quality and characterize bioaerosols in barns with conventional and alternative housing systems. The research team will measure respiratory function, the presence of inflammatory blood markers and the prevalence of allergies in egg producers, as well as the diversity of bacteria in their nasopharyngeal flora. The effectiveness of dust and gas reduction methods for air quality and the presence of bioaerosols in a commercial aviary will also be analyzed and measured.This study will describe egg producers’ exposure to dust and bioaerosols and their health, as a function of housing systems at egg farms. The team will be able to recommend strategies to improve air quality in aviary systems and enriched cages, an emerging workplace in Quebec. Other Project(s) You May be Interested in Bioaerosol exposure in wastewater treatment plants: molecular approach applications and viral riskExploratory evaluation of occupational exposure to chemicals and organic contaminants in biomethanation plants for putrescible organic matterUse of molecular tools for studying fungal diversity in aerosolsReducing worker exposure to gases, odours, dust and human pathogenic agents in pig farm buildings Additional Information Type: Project Number: 2018-0068 Status: Ongoing Research Field: Chemical and Biological Hazard Prevention Team: Caroline Duchaine (Centre de recherche Institut universitaire de cardiologie et de pneumologie de Québec)Stéphane Godbout (Institut de recherche et de développement en agroenvironnement)