A Case of Hypersensitivity Pneumonitis in a Worker Exposed to Metal Working Fluid

Lee, Sun Wung; Ko, Dong hee; Chin, Ku Won; Park, Dong-Uk; Lee, Jung Tak; Song, Yoon Hee; Lee, Sang Yoon

doi:10.35371/kjoem.2008.20.1.37

Cited by 4 publications

(1 citation statement)

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“…Airborne microbe concentrations were 38-42,500 CFU/m 3 . But, Lee et al [ 10 ] showed that, in a metal pipe cutting factory, the air exposure levels of oil mist, endotoxin, total bacteria, and fungi were TWA (8-hour) 0.531 mg/m 3 , 6.33 EU/m 3 , 100 CFU/m 3 , and 75 CFU/m 3 , respectively.…”

Section: Discussionmentioning

confidence: 99%

Microbial Exposure Assessment in Sawmill, Livestock Feed Industry, and Metal Working Fluids Handling Industry

Park

Lee

2010

Safety and Health at Work

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ObjectivesThe objective of this study is to investigate the distribution patterns and exposure concentrations of bioaerosols in industries suspected to have high levels of bioaerosol exposure.MethodsWe selected 11 plants including 3 livestock feed plants (LF industry), 3 metal working fluids handling plants (MWFs industry), and 5 sawmills and measured total airborne bacteria, fungi, endotoxins, as well as dust. Airborne bacteria and fungi were measured with one stage impactor, six stage cascade impactor, and gelatin filters. Endotoxins were measured with polycarbonate filters.ResultsThe geometric means (GM) of the airborne concentrations of bacteria, fungi, and endotoxins were 1,864, 2,252 CFU/m3, and 31.5 EU/m3, respectively at the sawmills, followed by the LF industry (535, 585 CFU/m3, and 22.0 EU/m3) and MWFs industry (258, 331 CFU/m3, and 8.7 EU/m3). These concentrations by industry type were significantly statistically different (p < 0.01). The ratio of indoor to outdoor concentration was 6.2, 1.9, 3.2, and 3.2 for bacteria, fungi, endotoxins, and dust in the LF industry, 5.0, 0.9, 2.3, and 12.5 in the MWFs industry, and 3.7, 4.1, 3.3, and 9.7 in sawmills. The respiratory fractions of bioaerosols were differentiated by bioaerosol types and industry types: the respiratory fraction of bacteria in the LF industry, MWF industry, and sawmills was 59.4%, 72.0%, and 57.7%, respectively, and that of fungi was 77.3%, 89.5%, and 83.7% in the same order.ConclusionWe found that bioaerosol concentration was the highest in sawmills, followed by LF industry facilities and MWFs industry facilities. The indoor/outdoor ratio of microorganisms was larger than 1 and respiratory fraction of microorganisms was more than 50% of the total microorganism concentrations which might penetrate respiratory tract easily. All these findings suggest that bioaerosol in the surveyed industries should be controlled to prevent worker respiratory diseases.

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Section: Discussionmentioning

confidence: 99%

Microbial Exposure Assessment in Sawmill, Livestock Feed Industry, and Metal Working Fluids Handling Industry

Park

Lee

2010

Safety and Health at Work

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Green manufacturing—performance of a biodegradable cutting fluid

Katna¹,

Singh²,

Agrawal³

et al. 2017

Materials and Manufacturing Processes

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Microbial Assessment in Metal-Working Fluids Handling Industry

Park¹,

Park²,

Park³

2014

Journal of Korean Society of Occupational and Environmental Hyg

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Objectives:The objective of this study is to evaluate microbial exposure hazards in the metal-working fluids(MWF) handling industry. Methods: Air quality parameters(airborne bacteria, fungi, endotoxin and oil mist) and bulk MWF in storage tanks were evaluated at 54 points at nine sites in South Korea. Results: The geometric means(GM) of culturable airborne bacteria, fungi, endotoxin and oil mist concentration were 133 CFU/㎥ (n=376, range 7~6,510 CFU/㎥), 159 CFU/㎥(n=381, range 7~8,469 CFU/㎥), 8.06 EU/㎥(n=103, range 0.34~280.4 EU/㎥) and 0.20 mg/㎥(n=104, range 0.01~2.87 mg/㎥), respectively. The ratio of indoor to outdoor concentration was 2.7 for bacteria, 6.1 for endotoxin, and 4.8 for oil mist. Even though average airborne bacteria concentration did not exceed recommended exposure limits(1,000 CFU/㎥), MWF in the storage tanks was highly contaminated with bacteria(arithmetic mean 2.1×106 CFU/ml) and exceeded recommended bacteria limits( 105 CFU/ml). Conclusions: It is necessary for MWF handling workplaces to conduct periodical biohazard inspection of MWF storage tanks. Additionally, further research may be necessary to establish biological occupational exposure limits.

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A Case of Hypersensitivity Pneumonitis in a Worker Exposed to Metal Working Fluid

Cited by 4 publications

References 0 publications

Microbial Exposure Assessment in Sawmill, Livestock Feed Industry, and Metal Working Fluids Handling Industry

Microbial Exposure Assessment in Sawmill, Livestock Feed Industry, and Metal Working Fluids Handling Industry

Green manufacturing—performance of a biodegradable cutting fluid

Microbial Assessment in Metal-Working Fluids Handling Industry

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