Document KJxXNDZqDe1ZGm6pZdo6ZGd6Q

QUESTION AND ANSWER SESSION FOLLOWING DR. SELIKOTT'S rfftffUTATXON in the asbestos products fsctory la which mm s^lsnl far only thros Months wars found to have s slfslflosat Ir-fiM in lung car.csr, were smoking histories obthftMt? (Dr. Sslikoff) . Ths answer is 'y*i" , and those data ara mm hsiaf aaatynl( Out I would ba earned If wa found any lung oancers or any ora than a trivial number among those who did not aaoka cigarettes. Wa have failod to sea any significant ineraaoa in the incidence of lung cancer snong asbestos workers who . do not smoke cigarettes. We have been following 2,06f aoa- snoking insulation workers from January 1967 through 1971 and we have only seen two lung cancers aaoag the*. On the other hand, of 9,590 cigarette smoking insulation workers, we have found 14* lung careers whereas only sosie 30 were expected. Bronchogenic carcinoma ia almost United to ciga rette smoking asbestos workers. This is not true of peritoneal mesothelioma* it is not true of asbestosis* and it is probably# although our data is too ecant yet to bo aura, it is probably not true of pleural nesotballons. Pet of long cancer * there is no question - this will not occur by and largo aosg aebaetoe workers who do not anoke cigarattos. 2 would like to ask Dr. Sslikoff If he thinks ths new standard should include both a total dust count - if there is a new standard - both a total dust count and a per cent fiber count. At least in our experience, we seen to vary independently. A standard set on ono rather than the other could be quite mis leading . * Ray Murphy has asked ate a very aafearrassing question. He asked me to give an opinion where I can't give it even on fiber counts. He now asked me whether I would do it on total counts rather than just fibers. The answer is, "I don't know." But I'm not very impressed (if I can upstage Duncan Hoi a bit who ia going to review this tomorrow morning) - we're not very impid--- : . aL*stos standards wuicta rely upon dust counts being done. May I give you sane date? -Vary depressing data, if you think these are depressing. On June 7, 1972, the asbestos standard came into affect. And it said that every company using asbestos had to do at least one dust count, one dust count, in the next six months. That is, by December C. Me, on December 7, did s survey of insulation workers in ths United States and wc now have some 5,000 odd replies. Each amn was asked about Um auit oounts that he pcrwMlly vton *wy ognuy u wwoiia to Oaitad itatM unUtioa Iadsatry, oulatioo vorkara uv avaa oaa iwt Poe--bor l< 172. Obviously tkaa, counktiinngo htoccAnmk <ji control in deficiencies. 0 It is really one gueetloo in t tbo Turner Ubaatoi thooo and could you difforcocos that you think nay bo chryaotilo aod anosito? A. The .fibers io Turner Brothers, siace.lt was a textile operation, were largely chrysotlle. MU can give you no information con cerning croeidollte because none of the workers studied by ns had any croeidollte exposure. They bad chrysotlle expoours and aany of then had aaosite exposure. Indeed, in the pleats, in the factory --king the levy insulation, this ues almost entirely aaosite. do cur data apply only to aaoslta and to ebryentile and, unfortunately, I can give you no Internetion on the relative hasard of croeidollte. X would suggest, however, that it ere eidolite is aore dangerous than --salts or chryeotile, it is going to be alaost as bed as his nhlusnaslh/lalbei (Langhbor) Q. Dr. selikoff, are you aware of e particular type at asbestos fiber nined in Ontario called loahuBT Fibers which have been found to be relatively inert, by Paul arose and others* A. X presuae that you nean the fibers wined in Quebec, act Ontario. (No, nined in Beadnan Mina in Ontario.) Mo, X do not know those particular fibers atd X would he delighted to know of on asbestos fiber which is cooperatively inert. Q. They clain - and Paul Gross end others have done experimental work - end they have found that this particular fiber which is ehryaoMi* he bean, in experiment.! work, found to be inert. A. well, I would be delighted to see those, indeed I'd be delighted to see those in industrial use. Thank you. Dr. Selikoff. PREVALENCE OF X-RAY EVIDENCE OF ASBESTOS)S IN ASBESTOS TEXTILE WORKERS A