Total and viable airborne bacterial load in two different agricultural environments using gas chromatography tandem mass spectrometry and culture: A prototype study

被引:23
作者
Krahmer, M
Fox, K
Fox, A [1 ]
Saraf, A
Larsson, L
机构
[1] Univ S Carolina, Sch Med, Dept Microbiol & Immunol, Columbia, SC 29208 USA
[2] Univ Lund, Dept Med Microbiol, S-22362 Lund, Sweden
来源
AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL | 1998年 / 59卷 / 08期
关键词
airborne bacteria; muramic acid; 3-hydroxy fatty acids;
D O I
10.1080/15428119891010695
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Airborne exposure to bacterial components found in agricultural environments can lead to pulmonary inflammation. Total (viable and nonviable) bacterial load was monitored in a stable and a dairy by a new approach, gas chromatography-tandem mass spectrometry measurement of muramic acid, a component of gram positive and gram negative bacterial peptidoglycan. Also used to assess the gram negative bacterial load were 3-hydroxy fatty acids, markers of bacterial lipopolysaccharide. culture, an established procedure for assessing the viable bacterial portion of airborne dust, served as a basis for comparison. The muramic acid and 3-hydroxy fatty acid concentrations (total C-12:0, C-14:0, and C-16:0) showed a correlation with an R-2 of 0.81. Dust and muramic acid levels also correlated. However, although relative muramic acid levels were lower in the stable than the dairy, colony forming units (CFU) were considerably higher in the stable. The total bacterial load (estimated from muramic acid values) for both the stable and dairy was also higher than would have been predicted from culture. These results suggest that nonculture based approaches and culture provide complementary but independent measurements of airborne biopollution.
引用
收藏
页码:524 / 531
页数:8
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