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Biomonitoring in California Firefighters
Metals and Perfluorinated Chemicals Objective: To assess California firefighters' blood concentrations of selected chemicals and compare with a representative US population. Methods: We report laboratory methods and analytic results for cadmium, lead, mercury, and manganese in whole blood and 12 serum perfluorinated chemicals in a sample of 101 Southern California firefighters. Results: Firefighters' blood metal concentrations were all similar to or lower than the National Health and Nutrition Examination Survey (NHANES) values, except for six participants whose mercury concentrations ...
Neurological outcomes associated with low-level manganese exposure in an inception cohort of asymptomatic welding trainees
Objective: Long-term, high-level exposure to manganese (Mn) is associated with impaired central nervous system (CNS) function. We quantitatively explored relations between low-level Mn exposure and selected neurological outcomes in a longitudinal inception cohort of asymptomatic welder trainees. Methods: Welders with no previous occupational Mn exposure were observed approximately every three months over the course of the five-quarter traineeship. Fifty-six welders were assessed for motor function using the Unified Parkinson Disease Rating Scale motor subsection part 3 (UPDRS3) and Grooved Pegboard...
How Does an Occupational Neurologist Assess Welders and Steelworkers for a Manganese-Induced Movement Disorder?
Part II, will present a synopsis of the evaluation including blood and urine manganese and results from one magnetic resonance image and discuss and analyze the results. Limitations and conclusions will be presented. Part I, from an earlier JOEM issue, focused on the historical background and literature supporting parkinsonism and manganese exposure, both from mining and welding. Differential diagnosis, including radiological assessment and methods were discussed. Source : Rutchik, Jonathan S., Zheng, Wei, Jiang, Yueming, Mo, Xuean, How Does an Occupational Neurologist Assess Welders and Steelworkers...
Levels and predictors of airborne and internal exposure to manganese and iron among welders
We investigated airborne and internal exposure to manganese (Mn) and iron (Fe) among welders. Personal sampling of welding fumes was carried out in 241 welders during a shift. Metals were determined by inductively coupled plasma mass spectrometry. Mn in blood (MnB) was analyzed by graphite furnace atom absorption spectrometry. Determinants of exposure levels were estimated with multiple regression models. Respirable Mn was measured with a median of 62 (inter-quartile range (IQR) 8.4–320) μg/m3 and correlated with Fe (r=0.92, 95% CI 0.90–0.94). Inhalable Mn was measured with similar...
Researchers: Welders May Be at Increased Risk for Brain Damage
New research suggests that workers exposed to welding fumes may be at risk for developing brain damage in an area of the brain also affected in Parkinson's disease. Fumes produced by welding contain manganese, a chemical element that, even at low levels, has been linked to neurologic problems including Parkinson's disease-like symptoms. Source : http://ehstoday.com/health/news/welders-increased-risk-brain-damage-0407/
Welders Exposed to Manganese Above Recommended Levels
Researchers investigating welding fume exposures have found that welders frequently are exposed to manganese at or above the American Conference of Governmental Industrial Hygienists (ACGIH) recommended limit of 0.2 milligrams per cubic meter. Source : http://ehstoday.com/industrial_hygiene/news/welders-exposed-manganese-above-recommended-levels-3151/ Résultats de la recherche : http://www.informaworld.com/smpp/content~db=all?content=10.1080/15459620903454600
Poisoned!
When workers developed the shakes, poor memory and depression working for a South African manganese company, their union knew the job was to blame. The government's compensation body agreed. So why did the company's medics instead suggest the symptoms were caused by alcohol, drugs or Aids? http://www.hazards.org/deadlybusiness/poisoned.htm

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