EEMB 50 Non Infectious Diseases
EEMB 50 Non Infectious Diseases
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This 2 page Reader was uploaded by Gabriela Lopez on Friday May 16, 2014. The Reader belongs to a course at University of California Santa Barbara taught by a professor in Fall. Since its upload, it has received 71 views.
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Date Created: 05/16/14
EEMB 50 May 16 2014 Lecture 20 Industrial Diseases Also known as occupational diseases Apt double meaning since it became a metaphor for strikes and other actions from unions Unions did not always play a positive role in health conditions of its workers Bemardino Ramazzini 16331714 was interested in diseases that workers had as a result of their job or occupation He said that occupation was a vital clue in medical evaluation He was the father of occupational medicine The Industrial Revolution brought an explosion of occupational diseases 1 Led workers to do the same task for hours a day for days after days 2 Because of this they had a longer exposure time things that might not be healthy for longer than before An example would be hat makers of the early 1900 s who had high exposure to Mercury components They had a long exposure to the Mercury and this resulted in their Nervous system being affected and causing them to not have control of their movements Many miners also had diseases that were as a result of the exposure to chemicals The unions never did anything about this issue however and so many workers were in danger In 1970 Nixon signed the Occupational Safety and Health Act whose main goal was to ensure that employers provide employees with an environment free of hazards such as exposure to toxic chemicals and unsanitary conditions Pneumoconiosis Miners lung Black lung 1 Resulted after long term exposure and inhalation of coal dust 2 The lungs are damaged when the walls of the alveoli are in amed and the lung stiffens from scarring of the tissue and leads to an inability of the lungs to function 3 It takes decades for it to progress to a very disabling stage 4 Prior to WWII miners still mined by hand but afterwards coal mines became mechanized and led to 2 associated changes 5 Because there was more productivity profits also went up 6 As productivity went up so did the coal dust and increased the exposure and deaths of miners inhaling the dust 7 For decades workers unions did nothing to decrease this exposure because productivity was so high 8 Coal miners themselves had to begin rallying and pressing for legislation 9 The Black Lung Benefits Act regulated levels of dust in the mines that the miners Were exposed to and provided benefits to those miners with black lung who are disabled and gives X ray screenings to test for the health of the Workers 10 The cases of black lung Went down for a time period but then they began to come back 0 Black lung has begun to reappear due to powerful mining equipment which has increased productivity and raising levels of dust 0 Shifts have become longer because more machines are doing the laborious Work and this increases their exposure to dust 0 Profits are more in uential however and regulations are not as efficient as in the l970 s 0 Asbestosis 1 6 7 Asbestos is a natural mineral that forms long thin microscopic fibers that are resistant to fire heat and chemicals and do not conduct electricity it is mined and used in different industries When it is processed it is more dangerous than when it is mined The individual crystal can be very small and fragment into smaller and smaller parts fibers to the point that they remain in the air for a long period and are easily inhaled They reach down deep in your lungs to the alveoli and stay there for many years It causes scarring in your lungs and making it hard to breathe and for Oxygen to get into the blood and your alveoli become damaged There needs to be long term exposure and usually takes decades to develop It can also act as a carcinogen of lung cancer 0 How does inert mineral cause cancer 1 2 There are 3 hypothesis Tangles chromosomes because some crystals are so small they interfere with chromosomes and cause mutations In ammatory response Releases lots of compounds that can cause hyperplasia and increase the number of cells being produced Concentrates other carcinogens and smoking increases these chances
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