Size Distributions of Bioaerosols in an Egg Production Facility and Its Vicinity

作者：Hu Di; Wang Li Lingjuan^*; Simmons Otto D; Classen John J; O**orne Jason A

来源：Environmental Engineering Science, 2016, 33(4): 215-223.

DOI：10.1089/ees.2015.0220

• size distribution
• animal feeding operation
• bacteria
• bioaerosol
• fungi

Air emissions from animal feeding operations may cause elevated concentrations of bioaerosols in surrounding areas, posing adverse health effects to the people working on or living near the farm. Concentrations of nonselective airborne bacteria and fungi in various size ranges were measured by the Andersen six-stage viable samplers in an egg production house and at four ambient stations surrounding the farm in winter, spring, and summer. It was discovered that in-house bacterial particle size distributions (PSDs) were different among seasons. Under higher temperature and lower relative humidity conditions, more bacteria were associated with the small size ranges. Seasonal variations of in-house fungal PSDs were not significant. On average, 60-80% of in-house bacteria were in respirable size range (<= 4.7 mu m), whereas 60-70% of in-house fungi were in respirable size range. Bacterial PSDs at ambient locations were different among stations in winter but not in spring and summer. There were significant differences in fungal PSDs among ambient stations in three seasons. On average, 50-80% of ambient bacteria were in respirable size range, and 60-90% of ambient fungi were in respirable range.

• 出版日期2016-4-1