Silicosis is not a new disease; the impact of silica dust on respiratory function was observed by Hippocrates in 430 B.C. and in the 16th century by Agricol. In 1713, Rammazini described silicotic nodules in post-mortems of stone cutters presenting with respiratory symptoms. In the mid-late 1800s,... the introduction of mechanized tools in the mining sector rapidly increased levels of silica exposure, resulting in an increase in cases and our understanding of silicosis.
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Asbestosis is a process of diffuse interstitial fibrosis of the lung due to exposure to asbestos dust. Asbestos is the name given to a group of naturally occurring minerals that are resistant to heat and corrosion; these include mineral fibers such as chrysotile, amosite, and crocidolite, among oth...ers. Chrysotile is by far the most common type of asbestos fiber produced in the world, and it accounts for virtually all commercial use of asbestos in the United States.
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Aerosol pollutants are known to raise the risk of development of non-communicable respiratory diseases (NCRDs) such as asthma, chronic bronchitis, chronic obstructive pulmonary disease, and allergic rhinitis. Sub-Saharan Africa’s rapid pace of urbanization, economic expansion, and population growt...h raise concerns of increasing incidence of NCRDs. This research characterizes the state of research on pollution and NCRDs in the 46 countries of Sub-Saharan Africa (SSA). This research systematically reviewed the literature on studies of asthma; chronic bronchitis; allergic rhinitis; and air pollutants such as particulate matter, ozone, NOx, and sulfuric oxide.
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Asbestos, the most frequent cause of occupational cancer, continues to be consumed ona massive scale, with millions of people exposed on a daily basis. This review explains why we havefailed in curtailing the silent epidemic of asbestos-related disease and why the numbers of asbestosvictims are like...ly to remain high. Emerging and developed countries have to be reminded that asbestosexposure has yet to become a problem of the past. The worldwide spread of asbestos, followed by thesurge of asbestos-related cancers, resembles the lung cancer epidemic caused by smoking andstimulated by manufacturers.
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South Africa has possibly the highest incidence of malignant mesothelioma anywhere, thanks to more than a century of mining asbestos in the Northern Cape, North- West, Limpopo and Mpumulanga provinces. There are three types of asbestos and all were mined in South Africa; the most carcinogenic is cro...cidolite, of which production peaked in 1977. The last asbestos mine closed only in 2002, and massive environmental contamination from unrehabilitated mines and mine dumps will ensure ongoing exposure well into the future.
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This American Thoracic Society Statement was prepared by a Committee of the Scientific Assembly on Environmental and Occupational Health at the request of the American Lung Association Occupational Health Expert Advisory Group to emphasize the continuing importance of silicosis as a major lung disea...se worldwide and the need for increasing efforts in prevention. Emphasis is placed on public health issues of silicosis rather than on important current research in pathologic mechanisms.
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This report highlights the increasing public health
burden of road traffic injuries and fatalities in
the Region. Road traffic deaths are becoming a
significant problem in Africa, rising at a faster rate
than in any other region. Fatalities increased by
nearly one fifth in the decade from 2010 ...to 2021,
with almost one quarter of a million people killed
on Africa’s roads within that decade
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