Exposure to airborne endotoxin in Italian greenhouses: environmental analyses

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  • GIOFFRÈ Angela
    INAIL Research – Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italy
  • MARRAMAO Antonella
    INAIL Research – Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italy
  • GESU Ignazio DI
    INAIL Research – Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italy
  • SAMELE Pasquale
    INAIL Research – Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italy
  • PABA Emilia
    INAIL Research – Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italy
  • MARCELLONI Anna Maria
    INAIL Research – Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italy
  • CHIOMINTO Alessandra
    INAIL Research – Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italy
  • IAVICOLI Sergio
    INAIL Research – Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italy

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<p>The peculiar characteristics of the greenhouses as confined spaces, microclimate and poor air exchange with the outside environment, encourage the development of a large number of biological agents. Endotoxin, is probably a major causative agent of occupational health problems. The objective of this study was to measure the concentrations of airborne endotoxin in greenhouses with different cultures. The influence of microclimate was studied in correlation with endotoxin levels and type of cultured vegetables. The data indicate that workers employed greenhouses are exposed to low levels of inhalable endotoxins; endotoxin concentrations do not correlate with the temperature and relative humidity values. A strong correlation between the leaf size and endotoxin concentration was observed. The mean concentration of endotoxins in the air of greenhouses is relatively low, however, there could be peaks of exposure during harvesting and eradication of broadleaf plants.</p>

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