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首页> 外文期刊>Environmental Science & Technology >Size, Composition, and Source Profiles of Inhalable Bioaerosols from Colorado Dairies
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Size, Composition, and Source Profiles of Inhalable Bioaerosols from Colorado Dairies

机译：来自科罗拉多州乳业的可吸入生物气溶胶的大小，组成和来源特征

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摘要

Particulate matter emissions from agricultural livestock operations contain both chemical and biological constituents that represent a potential human health hazard. The size and composition of these dusts, however, have not been well described. We evaluated the full size distribution (from 0 to 100 µm in aerodynamic diameter) and chemical/biological composition of inhalable dusts inside several Colorado dairy parlors. Four aerodynamic size fractions (<3, 3—10, 10—30, and >30 µm) were collected and analyzed using a combination of physiochemical techniques to understand the structure of bacterial communities and chemical constituents. Airborne particulate mass followed a bimodal size distribution (one mode at 3 µm and a second above 30 µm), which also correlated with the relative concentrations of the following microbiological markers: bacterial endotoxin, 3-hydroxy fatty acids, and muramic acid. Sequencing of the 16S- rRNA components of this aerosol revealed a microbiome derived predominantly from animal sources. Bacterial genera included Staphlyococcus, Pseudomonas, and Streptococcus, all of which have proinflammatory and pathogenic capacity. Our results suggest that the size distribution of bioaerosols emitted by dairy operations extends well above 10 µm in diameter and contains a diverse mixture of potentially hazardous constituents and opportunistic pathogens. These findings should inform the development of more effective emissions control strategies.
机译：农牧业经营活动产生的颗粒物排放物含有化学和生物成分，对人类健康构成潜在危害。但是，这些粉尘的大小和组成尚未得到很好的描述。我们评估了科罗拉多州几家乳品店内可吸入灰尘的全尺寸分布（空气动力学直径从0到100 µm）和化学/生物成分。收集了四个空气动力学尺寸分数（<3、3-10、10-30和> 30 µm），并结合物理化学技术进行了分析，以了解细菌群落和化学成分的结构。空气中颗粒物的质量遵循双峰大小分布（一种模式为3 µm，另一种模式为30 µm以上），还与以下微生物标志物的相对浓度相关：细菌内毒素，3-羟基脂肪酸和山mic酸。对该气溶胶的16S-rRNA成分进行测序后，发现了一个主要来自动物来源的微生物组。细菌属包括葡萄球菌，假单胞菌和链球菌，它们均具有促炎和致病能力。我们的结果表明，乳业运营所散发的生物气溶胶的粒径分布远远超过直径10 µm，并且包含潜在危险成分和机会病原体的多种混合物。这些发现应有助于制定更有效的排放控制策略。

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  • 来源
    《Environmental Science & Technology》 |2017年第11期|6430-6440|共11页
  • 作者

    Joshua W. Schaeffer; Stephen Reynolds; Sheryl Magzamen; Amanda VanDyke; Neil R. Gottel; Jack A. Gilbert; Sarah M. Owens; Jarrad T. Hampton-Marcell; John Volckens;

  • 作者单位

    Department of Environmental and Radiological Health Sciences, Fort Collins, Colorado 80523, United States,High Plains Intermountain Center for Agricultural Health and Safety, and Fort Collins, Colorado 80523, United States;

    Department of Environmental and Radiological Health Sciences, Fort Collins, Colorado 80523, United States,High Plains Intermountain Center for Agricultural Health and Safety, and Fort Collins, Colorado 80523, United States;

    Department of Environmental and Radiological Health Sciences, Fort Collins, Colorado 80523, United States;

    Department of Environmental and Radiological Health Sciences, Fort Collins, Colorado 80523, United States,High Plains Intermountain Center for Agricultural Health and Safety, and Fort Collins, Colorado 80523, United States;

    The Microbiome Center, Biosciences Division, Argonne National Laboratory, Lemont, Illinois 60439, United States,The Microbiome Center, Department of Surgery, University of Chicago, Chicago, Illinois 60637, United States;

    The Microbiome Center, Biosciences Division, Argonne National Laboratory, Lemont, Illinois 60439, United States,The Microbiome Center, Department of Surgery, University of Chicago, Chicago, Illinois 60637, United States;

    The Microbiome Center, Biosciences Division, Argonne National Laboratory, Lemont, Illinois 60439, United States;

    The Microbiome Center, Biosciences Division, Argonne National Laboratory, Lemont, Illinois 60439, United States,Department of Biological Sciences, University of Illinois at Chicago, Chicago, Illinois 60607, United States;

    Department of Environmental and Radiological Health Sciences, Fort Collins, Colorado 80523, United States,High Plains Intermountain Center for Agricultural Health and Safety, and Fort Collins, Colorado 80523, United States,Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado 80523, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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