Protection Provided by Surgical Masks and N95 Filtering Facepiece Respirators Against Airborne Bacterial Pollutant in Agricultural Farms
| Autor: | Chieh-Fu Tsai, 蔡杰孚 |
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| Rok vydání: | 2011 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 99 A previous epidemiological study of agriculture workers indicated that farmers have the greatest number of work-related health complaints. Most of the complaints are related to respiratory problems such as coughing, shortness of breath and asthma symptoms. Exposure to grain dusts, mould spores, organic and inorganic dusts, insecticides, bacteria, fungi and bacterial endotoxins, farm workers may result in health risk. Studies indicated that the contamination tends to cause cellular responses which result in or are indirectly associated with lung disease. We conduct a study in different farms to estimate farmers’ exposure to bacterial pollutant in work and provided protection by surgical masks and N95 filtering facepiece respirators against airborne bacterial pollutant in agricultural farms. Our results show that the concentrations of bacteria, Gram-negative bacteria and endotoxin concentration respectively range from 1.8 μm of the geometric mean WPF of bacterial contaminants are greater than 10, while the particle size range 1 -1.8 μm and 0.05), which means the fit test results can not replace the workplace protection factor. Carbon dioxide, temperature, and relative humidity and other environmental factors together with bacteria, Gram-negative bacteria, endotoxin, and the results of microbial viability found no statistically significant correlation (p> 0.05). The results show carbon dioxide, temperature, and relative humidity and other environmental factors will not affect the distribution of bacterial pollutant in farms. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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