Abstract
To find out whether exposure to sulphur dioxide during infancy is related to the prevalence of bronchial hyper-responsiveness (BHR), we studied schoolchildren (aged 7-13 years) from two areas of Norway–a valley containing a sulphur-dioxide-emitting aluminium smelter and a similar but non-industrialised valley. Bronchial responsiveness was assessed in 529 of the 620 participants. The median exposures to sulphur dioxide and fluoride were 37.1 micrograms/m3 and 4.4 micrograms/m3 at ages 0-12 months and 37.9 micrograms/m3 and 4.4 micrograms/m3 at 13-36 months. The risk of BHR increased with exposure to sulphur dioxide and fluoride at these ages; the odds ratio for a 10 micrograms/m3 increase in sulphur dioxide exposure at 0-12 months was 1.62 (95% CI 1.11-2.35) and that for a 1 microgram/m3 increase in fluoride exposure was 1.35 (1.07-1.70) at 0-12 months and 1.38 (1.05-1.82) at 13-36 months. Exposure to these low concentrations of airway irritants during early childhood is associated with an increased prevalence of BHR in schoolchildren.
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Allergy to fluoride
Six children and one adult exhibited various allergic reactions after the use of toothpaste and vitamin preparations containing fluoride. The following conditions were encountered: Urticaria, exfoliative dermatitis, atopic dermatitis, stomatitis, gastro-intestinal and respiratory allergy.
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Increased CD3 positive cells in bronchoalveolar lavage fluid after hydrogen fluoride inhalation
OBJECTIVES: This study examined whether experimental hydrogen fluoride exposure for 1 hour induces an inflammatory response in the lower respiratory tract that is detectable in bronchoalveolar lavage fluid. METHODS: Nineteen healthy, nonsmoking men were exposed for 1 hour to constant low (<0.6 mg/m3), intermediate (0.7-2.4 mg/m3), or high (2.5-5.2 mg/m3) concentrations
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Subchronic neurotoxicity in rats of the structural fumigant, sulfuryl fluoride
Inhalation exposure of male and female Fischer 344 rats to sulfuryl fluoride [Vikane (Dow Chemical Company) gas fumigant] at 300 ppm for 6 hr/day, 5 days week, for 13 weeks caused diminished weight gain, dental fluorosis, a slight decrease in grooming, decreased flicker fusion threshold, slowing of flash, auditory and
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The effect of antioxidative vitamins A and E and coenzyme Q on the morphological picture of the lungs and pancreata of rats intoxicated with sodium fluoride
Fluorides, when taken in amounts exceeding the standard therapeutic dosage, are regarded as toxic substances. Recent studies show that fluorides may affect the oxidoreductive processes of cells. The aim of the following study is to investigate the effect of antioxidative vitamins A and E and coenzyme Q on the morphological
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Fluoride in Drinking Water: A Scientific Review of EPA’s Standards.
Excerpts: Summary Under the Safe Drinking Water Act, the U.S. Environmental Protection Agency (EPA) is required to establish exposure standards for contaminants in public drinking-water systems that might cause any adverse effects on human health. These standards include the maximum contaminant level goal (MCLG), the maximum contaminant level (MCL), and the secondary
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Fluoride & the Immune System - Summation from the US National Research Council (2006)
“There is no question that fluoride can affect the cells involved in providing immune responses. The question is what proportion, if any, of the population consuming drinking water containing fluoride at 4.0 mg/L on a regular basis will have their immune systems compromised? Not a single epidemiologic study has investigated whether fluoride in the drinking water at 4 mg/L is associated with changes in immune function. Nor has any study examined whether a person with an immunodeficiency disease can tolerate fluoride ingestion from drinking water.”
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Does Fluoride Ingestion Affect Developing Immune System Cells?
Considerations, supported by some published experimental evidence, suggest that fluoride released during the resorption of high-fluoride bone may produce detrimental effects not only on bone cells but on developing cells of the immune system.
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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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Is the Ingestion of Fluoride an Immunosuppressive Practice?
This paper records several observations which suggest that habitual ingestion of small doses of fluoride, even as small as the 1 mg/L contained in fluoridated water, may decrease the function of the immune system.
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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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