Donham K J, Scallon L J, Popendorf W, Treuhaft M W, Roberts R C
Am Ind Hyg Assoc J. 1986 Jul;47(7):404-10. doi: 10.1080/15298668691389955.
As part of a project to evaluate health hazards for workers in swine confinement buildings, the air in 21 different buildings was sampled with 37 mm cassette filters with and without cyclone preselectors and with cascade impactors. Filter results yielded a mean total aerosol of 6.3 mg/m3, a mean respirable aerosol of 0.5 mg/m3; the geometric mean diameter was 2.9 microns. Cascade impactor measurements revealed a mean total aerosol of 7.6 mg/m3, a respirable aerosol of 2.5 mg/m3 and a mass median diameter of 9.6 microns. The two major constituents in these aerosols were grain particles and dried fecal matter. The grain particles were larger than fecal particles and proportionately more abundant in finishing buildings where 50 kg X 100 kg animals are housed. Therefore the respirable fraction was less in finishing buildings than in farrowing and nursery buildings. Culturing of settled dusts yielded six different mold species, with the highest counts for Verticillium sp. (5 X 10(2) cfu/mg dry dust) grown at 37 degrees C. Thermophilic Actinomycetes and both gram negative and gram positive bacteria were isolated. Azocasein proteinase activity was found in most dust samples analyzed. This dust had a protein content of about 23% and a mean adsorbed ammonia content of 0.4%.
作为一项评估猪舍工人健康危害项目的一部分，使用带有和不带有旋风预分选器的37毫米盒式过滤器以及串联冲击器对21座不同猪舍的空气进行了采样。过滤器检测结果显示，总气溶胶平均浓度为6.3毫克/立方米，可吸入气溶胶平均浓度为0.5毫克/立方米；几何平均直径为2.9微米。串联冲击器测量结果显示，总气溶胶平均浓度为7.6毫克/立方米，可吸入气溶胶浓度为2.5毫克/立方米，质量中值直径为9.6微米。这些气溶胶中的两种主要成分是谷物颗粒和干粪便。谷物颗粒比粪便颗粒大，在饲养50千克至100千克猪的育肥舍中，谷物颗粒按比例更为丰富。因此，育肥舍中的可吸入部分比产仔舍和保育舍中的少。对沉降灰尘进行培养，发现了六种不同的霉菌，其中在37摄氏度下生长的轮枝菌属（5×10² 菌落形成单位/毫克干尘）数量最多。分离出了嗜热放线菌以及革兰氏阴性菌和革兰氏阳性菌。在大多数分析的灰尘样本中发现了偶氮酪蛋白蛋白酶活性。这种灰尘的蛋白质含量约为23%，平均吸附氨含量为0.4%。
