Causes of Asbestos poisoning
Asbestos poisoning Causes: Book Excerpts
Related information on causes of Asbestos poisoning:
As with all medical conditions,
there may be many causal factors.
Further relevant information on causes of Asbestos poisoning may be found in:
Causes of Asbestos poisoning: Online Medical Books
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Asbestosis:
Causes and incidence
(Professional Guide to Diseases (Eighth Edition))
Asbestosis results from the inhalation of respirable asbestos fibers (50 microns or more in length and 0.5 microns or less in diameter), which assume a longitudinal orientation in the airway and move in the direction of airflow. The fibers penetrate respiratory bronchioles and alveolar walls. Sources include the mining and milling of asbestos, the construction industry, and the fireproofing and textile industries. Asbestos was also used in the production of paints, plastics, and brake and clutch linings.
Asbestos-related diseases develop in families of asbestos workers as a result of exposure to fibrous dust shaken off workers’clothing at home. Such diseases develop in the general public as a result of exposure to fibrous dust or waste piles from nearby asbestos plants, but exposures for occupants of typical buildings are quite low and not in a range associated with asbestosis.
Inhaled fibers become encased in a brown, proteinlike sheath rich in iron (ferruginous bodies or asbestos bodies), found in sputum and lung tissue. Interstitial fibrosis develops in lower lung zones, causing obliterative changes in lung parenchyma and pleurae. Raised hyaline plaques may form in parietal pleura, diaphragm, and pleura contiguous with the pericardium.
Asbestosis occurs in 4 of every 10,000 people.
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Source: Professional Guide to Diseases (Eighth Edition), 2005
Poisonous snakebites:
Causes and incidence
(Professional Guide to Diseases (Eighth Edition))
Of the approximately 45,000 snakebites that occur in the United States each year, 7,000 to 8,000 are from poisonous snakes, resulting in 5 to 6 deaths. Such bites are most common during summer afternoons in grassy or rocky habitats.
Pit vipers are nocturnal but active snakes that are responsible for 99% of venomous snake bites in the United States. Coral snakes are also nocturnal, but their placidity makes coral snake bites less common than pit viper bites. Coral snakes tend to bite with a chewing motion, and may leave multiple fang marks, small lacerations, and extensive tissue destruction.
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Source: Professional Guide to Diseases (Eighth Edition), 2005
Snakebites, poisonous:
Causes
(Handbook of Diseases)
The only poisonous snakes in the United States are pit vipers (Crotalidae) and coral snakes (Elapidae). Pit vipers include rattlesnakes, water moccasins (cottonmouths), and copperheads. They have a pitted depression between their eyes and nostrils and two fangs, ¾" to 1¼"nbsp;(2 to 3 cm) long. Because fangs may break off or grow behind old ones, some snakes may have one, three, or four fangs.
Because coral snakes are nocturnal and placid, their bites are less common than pit viper bites; pit vipers are also nocturnal but are more active. The fangs of coral snakes are short but have teeth behind them. Coral snakes have distinctive red, black, and yellow bands (yellow bands always border red ones), tend to bite with a chewing motion, and may leave multiple fang marks, small lacerations, and much tissue destruction.
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Source: Handbook of Diseases, 2003
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