Journal of Environmental Health Sciences (한국환경보건학회지)

Korean Society of Environmental Health (한국환경보건학회)
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Concentrations of Airborne Microorganisms and Endotoxins in Duck Houses

오리 사육장의 공기 중 부유 미생물 및 내독소 노출 농도

  • Lee, Yun-Keun (Wonjin Institute of Occupational and Environmental Health) ;
  • Kim, Won (Wonjin Institute of Occupational and Environmental Health) ;
  • Kim, Hyo-Cher (National Academy of Agricultural Science, RDA) ;
  • Park, Dong-Uk (Department of Environmental Health, Korea National Open University)
  • 이윤근 (노동환경건강연구소) ;
  • 김원 (노동환경건강연구소) ;
  • 김효철 (국립농업과학원) ;
  • 박동욱 (한국방송통신대학교 환경보건학과)
  • Received : 2010.04.15
  • Accepted : 2010.06.19
  • Published : 2010.06.30
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Abstract

The aim of this study was to determine the concentrations of air-borne microorganisms (bacteria, fungi, gram negative bacteria (GNB), endotoxins, and respirable suspended particles (RSPs), and their correlation with environmental parameters (temperature, humidity, and carbon dioxide levels) in duck houses. The mean concentrations of bacteria, fungi, and GNB were very high (> $10^6\;CFU/m^3$), and endotoxin levels exceeded $10^3\;EU/m^3$. Among the various work stages, in the task of receiving ducks, bacteria were $6.2{\times}10^6;CFU/m^3$, and GNB were $5.4{\times}10^6\;CFU/m^3$, while RSPs levels were $397.6\;{\mu}g/m^3$ and endotoxin levels were $47.2{\times}10^3\;EU/m^3$ in the task of dividing the ducks, and fungi were $4.9{\times}10^6\;CFU/m^3$ in the task of shipping the ducks. The concentrations of RSPs and endotoxins were significantly higher in tasks involving greater movement of ducks in the house, relative to tasks involving little movement of ducks (p<0.05). Further, with progression in growth of the ducks, the concentrations of bacteria, GNB, endotoxins, and RSPs were significantly increased. There was significant correlation between levels of GNB with bacteria (r=0.75) and fungi (r=0.86), endotoxins with RSPs (r=0.75), bacteria with fungi (r=0.39), and carbon dioxide with RSPs (r=0.38), bacteria (r=0.33), and endotoxins (r=0.31). These results suggest considerable respiratory hazard for farmers in these environments.

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References

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