Health effects of natural dust: role of trace elements and compounds

Our plain-English summary of Health effects of natural dust: role of trace elements and compounds, by A.G. Cook, P. Weinstein, J.A. Centeno (Biological Trace Element Research, 2005).

The study

• Authors: A.G. Cook, P. Weinstein, J.A. Centeno
• Journal: Biological Trace Element Research
• Published: 2005;103(1):1-15
• Type of article: Review
• Cited by: 46 articles, as counted by NIH iCite
• Read it: PubMed · Publisher

Abstract

This article reviews the health effects of trace elements carried in natural dusts of geologic or geochemical origin. The sources of these dusts are diverse, including volcanoes, dust storms, long-range transport of desert dust, and displacement through natural processes such as landslides and earthquakes. The primary focus is dust exposures affecting communities rather than occupational groups (which have been comprehensively explored in other publications). The principal elements and compounds reviewed are trace metals (including As, Hg, Cd, and Fe), radioactive elements, fluoride, silicates, natural asbestiform compounds, and alkali salts. The pathways by which such agents affect human populations are explored, including carriage through water, air, soil, and the food chain. The mechanisms of biotoxicity and the acute and chronic consequences on health associated with these elements are described. The discussion explores problems inferring risk and disease causation from natural dust exposures using standard epidemiological indicators, particularly for chronic outcomes, and will argue for the importance of the ecological perspective in assessing pathogenesis. The authors stress the global scale of the problem, which remains underevaluated and underreported in terms of health implications.

In plain English

This article was a review, not a new study. The authors reviewed published work on the health effects of trace elements and compounds carried in natural dusts from volcanoes, dust storms, desert dust and landslides. It focused on exposures affecting communities rather than workers. Topics included trace metals, radioactive elements, fluoride, silicates, natural asbestiform compounds and alkali salts. On asbestos-like minerals, the review cited other researchers' reports. One reported that in regions of Turkey, erionite dust was linked to elevated mesothelioma rates, and in one village incidence was 10,000 times greater than expected. Others linked anthophyllite and tremolite in soils to pleural plaques in nearby agricultural communities, and fibrous sepiolite in soil to pleural calcification in Bulgaria. One identified 2–4% tremolite in children's playpen sand in the United States. Another associated mesothelioma with volcanic dust containing fluoro-edenite in Sicily. The authors noted that risks from naturally occurring asbestiform dusts had been less thoroughly investigated, and that linking natural dust to disease in communities is much harder than in workplaces. They stressed that the problem is global and underevaluated.

We wrote this plain-English summary from the full article with the help of AI, and a second AI model checked each sentence against the article. It is not the authors' wording; the abstract and the article are their own account.

What the study did and found

• Design: narrative review of published literature
• Who was studied: communities exposed to natural dusts of geologic origin worldwide, rather than occupational groups; no new population was studied
• Exposure: trace elements and compounds in natural dusts: trace metals and metalloids, radioactive elements, fluoride, silicates, natural asbestiform compounds (including erionite, tremolite, anthophyllite, sepiolite, fluoro-edenite) and alkali salts
• Main results:
  • The review cited a study from the Cappadocian region of Turkey (reference 25) in which erionite dust exposure was linked to elevated mesothelioma rates. In one village, incidence rates were 10,000 times greater than expected.
  • The review cited reports that fibrous minerals, including anthophyllite and tremolite, identified in soils of central Europe, Finland, Turkey and Canada had been linked to pleural plaques in neighboring agricultural communities.
  • The review cited a report of 2–4% tremolite content in children's playpen sand in the United States.
  • The review cited a report linking fibrous sepiolite from soil to pleural calcification in Bulgarian populations.
  • The review cited an article that drew an association between mesothelioma and volcanic dust containing fluoro-edenite, a fibrous amphibole chemically similar to tremolite, in a region of Sicily.
• The authors' conclusion: The authors stressed the global scale of health problems from natural dusts, which they described as underevaluated and underreported. They argued for cooperation among geologists, climatologists and medical specialists, and for a global perspective.
• Limitations the authors state:
  • The authors stated that the risks from asbestiform compounds in naturally occurring dusts had not been as thoroughly investigated or described as commercial asbestos.
  • The authors stated that linking the effects of natural dust to exposed communities on a large scale is much more challenging than in occupational settings.

Topics

Medical terms in this study, explained in our Lexicon: Silicate, Asbestiform, Causation.

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