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A study of dust generated during silo opening and its physiologic effects on workers.
May-JJ; Pratt-DS; Stallones-L; Morey-PR; Olenchock-SA; Deep-IW; Bennett-GA
Principles of health and safety in agriculture. Dosman JA, Cockcroft DW, eds., Boca Raton, FL: CRC Press, Inc., 1989 Oct; :76-79
A study was conducted on dust levels generated during silo uncapping. Dust levels in five silos in New York were measured on the days of uncapping as were the levels of dust exposure of farmers during this activity. The mean silo dust levels were widely variable with the highest level of 129mg/m3 seen at the base of one silo. The respirable dust levels were also variable with the highest level, 24mg/m3, being associated with the silo that had the highest measured dust level. The airborne concentrations of all types of organisms studied, including mesophilic and thermophilic fungi and thermophilic bacteria, were extremely high with levels of thermophilic bacteria exceeding 4 billion/cubic meter. Zygomycetes were the predominant fungal species present. Endotoxin levels were highest in the silo with the highest dust level and a mycotoxin was found in one silo containing corn silage. The white blood cell counts of workers after opening of the silos were found to be significantly increased compared with preopening counts.
Organic-dusts; Agricultural-workers; Grain-dusts; Dust-analysis; Respirable-dust; Occupational-exposure; Toxic-effects
Book or book chapter
Principles of health and safety in agriculture
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Content source: National Institute for Occupational Safety and Health Education and Information Division