Document yr1vZdxeq9kkb9NE276Gr7Zdn

FILE NAME: CertainTeed (CERT) DATE: I960 Aug3 DOC#: CERT056 DOCUMENT DESCRIPTION: Unpublished Notes on Papers at 13th International Congress on Occupational Health - Horowitz #3 0 /LoW rtf'- # .ft Notes on Papers at 13th International Congress _________ on Occupational Health_______________ August 3, 1960 1. Bronchitis is often associated with Pneumoconisis (& Silicosis). 2. There is no consistant relationship between .-.ilicosis exposure and bron chitis-only with heavier ;,;v.al.ai and vary ni0h du^t expo. u .e i., there such a relationship. 3. Dr. Nugene P. Pendergrass, University of Pennsylvania - in Philadelphia (is considered lo be one of the top wen in X-ray interpretations) He 6aid that there is much over-interpretation or X-rays by medical men who may make a diagnosis of pneumoconiosis upon knowledge of patients exposure to dust, although such a condition may not exist. Note: See attached chart for example of such mistaken diagnosis from X-ray charts. h. A study of workers exposed to quartz du,,t in Sweden revealed that the asL.anpi.ion, that removal from dusty enviornment prevents progress ion of ^ stage silicosis, is incorrect. Suspension from work with a high silicosis risk should take place before pulmonary lesions become roentgenologically visible. 5. The relation between asbestos and lung cancer has not been firmly es tablished. Lung cancer related to industry require, much study. 6. Asbestosis has occurred in people outside of mines and plant;.. ( fore Air Pollution Control is important. There 7. Chronic pulmonary disease (nontuberculoua, nonmalignant) is highest in dusty trades. People with allergy (asthma and emphysema) should not take dusty jobs. 8. Nonoccupational Asbestosis: Pleural calcification has sometimes been observed in patients ex posed to such duGts as asbestos, tale, and mica. Unusual cases of as bestosis in which calcification was the main finding have been reported from Germany. About 100 cases of pleural calcification were found in patients with no history of pleural disease and no occupational exposure to dust. They were found among inhabitants around 2 asbestos mines, Hal ;salmi and faakklla (Union of South Africa?) the largest producers of anthOphyllitic asbestos in the world. This belongs to the anphibole asbestos group sod differs froa the commoner serpent inf type. It is possible that even very small amounts of asbestos will cause calcification. Castleman.CERT001369 rI- & dotes on Papers at 13th Interuatiuur.l (".(mgret. s _____________ on Occupational Health_______ _____ 9. The ooidative (chemically active) properties of quartz in the develop ment of silicosis are probably more inportant than previously considered. All types of asbestos (chrysotile, crosydolite, mnosite) nined or pro cessed in South Africa can produce asbestosis. Asbestosis has lean found in people not subjected to industrial exposures, who were born in the area of the nines, or those who transported it 'ltd even 3 nurses who were never 1 near the mines. Union of South Africa will send a team to the U.S. to learn of asbestos problems here 10. Iron Coated Carbon Particles in the Human Lung: In pathological studies of the lung many pseuooasbestos bodies have been found. This is true 6f coal miners (anthracite) from Pennsylvania and city duellers in Met: York when coal was the major fuel used. Iron deposits around this carbon or other pseudoasbestos it does around aBbestos in the lungs. This could result diagnosis during pathological study of lung tissue. The however, is transparent and the carbon is black. bodies just as in a wrong asbestos body, This kind of peeudoasbestos body does cot show up on X-ray picture. 11. One study concluded that it could not be established that there is no silica in lungs of coal miners because all coal lias silica associated with it. Note: Thera was a graat deal of interest in Asbestosis from the floor during most discussion periods. LD.l/jl Leon D. Horowitz Castleman.CERT001370