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KMID : 0371019970300040752
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Journal of Preventive Medicine and Public Health
1997 Volume.30 No. 4 p.752 ~ p.763
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Respiratory symptoms of workers exposed to the fume containing manganese
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Yu Sun-Hee
Kim Doo-Hee
Lim Hyun-Sul
Kim Ji-Yong
Choi Byung-Soon
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Abstract
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To evaluate the effect of manganese on the respiratory system, we investigated the respiratory symptoms of 63 male workers exposed to fume containing manganese (Mn), iron (Fe), and silica (Si), and compared them with those of 66 mole workers not exposed to the fume in a manganese alloy smelting factory.
The prevalence ratios of the seven respiratory symptoms were not different between two groups. The presence of any respiratory symptom was not related with the age, duration of employment, smoking status of workers, and exposureto fume. In furnace workers, it was not related with the airborne Mn, Fe, and Si concentration in the total or respirable fume. Airborne Mn concentrations of all 4 furnaces, in the respirable fume were below 1 mg/m3. There were two suspicious cases of pneumoconiosis among furnace workers and one definite case(1 /2) among casting workers who were not exposed to fume.
The above results suggest that the exposure to the low airborne Mn concentration is not related with respiratory symptoms and pneumoconiosis. However, it is necessary to study the respiratory effects of Mn using the symptom questionnaire with consideration of the severity and persistence of symptoms and the time interval from exposure.
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KEYWORD
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Respiratory symptoms, Fume, Manganese, Iron, Silica
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