Abstract
OBJECTIVE: To examine the incidence of occupational asthma in the seven aluminum smelters of Australia and New Zealand from 1991 to 2006.
METHODS: Incidence and exposure data were collected by survey from the smelters prospectively during the study period.
RESULTS: The incidence of occupational asthma across all smelters combined was highest in 1992 at 9.46/1,000/year, declining to 0.36/1,000/year in 2006; a 96.2% reduction. The incidence of occupational asthma was correlated with geometric mean total fluoride concentration, measured as personal samples from employees undertaking anode changing (r(s) = 0.497, P < 0.001).
CONCLUSIONS: The control of exposures, respiratory protection and pre-placement medical assessments undertaken during the study period seem to have contributed to the substantial decline in occupational asthma incidence.
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Inflammatory responses of rat alveolar macrophages following exposure to fluoride
Inhalation exposure to fluoride compounds has been associated with respiratory failure. We have addressed effects of fluoride on alveolar macrophages and lung responses to intratracheally (i.t.) instilled fluoride in rats. I.t. instillation of fluoride at doses of 200 and 400 microg F/rat caused significant polymorphonuclear leukocyte (PMN) infiltration in the
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Health effects of residential exposure to aluminum plant air pollution
In this study, the authors evaluated the relative risk of residential exposure to air pollution from an aluminum plant. The authors used government-compiled data to compare hospital admissions in 1997 for selected respiratory diseases for 2 communities in Brazil. One community, Ouro Preto, was located near an aluminum plant, and
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Reproductive and developmental toxicity of degradation products of refrigerants in experimental animals
The present paper summarizes the results of animal studies on the reproductive and developmental toxicity of the degradation products of refrigerants, including trifluoroacetic acid (TFA), carbon dioxide (CO(2)), carbon monoxide (CO), carbonyl fluoride (CF), hydrogen fluoride (HF) and formic acid (FA). Excessive CO(2) in the atmosphere is testicular and reproductive
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Mitochondrial respiratory chain damage and mitochondrial fusion disorder are involved in liver dysfunction of fluoride-induced mice.
Highlights Excessive fluoride intake resulted in liver dysfunction. Fluoride increased ROS production and decreased ATP content in the liver tissue. Fluoride damaged the liver tissue ultrastructure. Fluoride induced mitochondrial respiratory chain damaged. Fluoride induced mitochondrial fusion disorder. Our previous study showed that excessive fluoride (F) intake can induce liver dysfunction. The
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Acute symptoms after a community hydrogen fluoride spill
OBJECTIVES: This study was conducted to describe the demographic characteristics, and clinical signs and symptoms of patients who visited a general hospital because of the release of chemically hazardous hydrogen fluoride that occurred on September 27, 2012 in Gumi City, Korea. METHODS: The medical records at 1 general hospital 9 km
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Respiratory Risks from Occupational Fluoride Exposure
Starting in the 1930s, scientists have observed that workers exposed to airborne fluorides suffer from an elevated rate of respiratory disorders. For over 50 years, however, US government and industry scientists made repeated assurances that the allowable level of fluoride dusts and gases in industrial workplaces would not cause any
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Fluoride Enhances Toxicity of Beryllium
Occupational exposure to beryllium is well-documented to put workers' health at risk. The two principal targets of beryllium poisoning are the respiratory system and the skin. Of all beryllium compounds, beryllium fluoride complexes (including beryllium fluoride and beryllium oxyfluoride) appear to be the most toxic. As shown below, studies dating back
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