Document J3aRwxEywp9q3bJRX7a9mm0re

INDUSTRIAL HEALTH NEWS LITERATURE ABSTRACTS MEDICAL ' ENGINEERING CHEMICAL TOXICOLOGICAL ' LEGAL * - - dd*ioo *nd Ctad JANUARY, 1950 j- (VoL 14, No. I) r <e INDUSTRIAL HYGIENE FOUNDATION 4400 nrra avznue -> Pittsburgh u, pa. 'tXfrH'lL/r ^ icXrtiit HT ~Ht-- / SC r*\ Mexican descent. The excluded vhites frcn Grout A ccrprioe Grout 3. Grout C contains only negroes. The roentger.ographic findings for S.9S2 students shoved e-'idence of reinfection tuberculosis in or O.1* per cent. The highest rate, 0.52 per cent, va3 found in Group 3. The rate in Group A vas slightly higher than in Group C. A total of d,l;2 industrial vorhers shoved evidence of reinfection tuberculosis in 73 tersons, or 2.5 ter cent. The coztarative rates of incidence for the three grouts vere the sane as for the student groups, though ruch higher. Srphasis va3 placed on the sccio- eccncnic status and 'its relationship to the prevalence of tuberculosis ancrg those in Group 3. Other abnornaiities of the chest vers found in 0.52 ter cent of the students, vith hone Ir.volvenent as the or inary finding. Of the industrial vcrhers exanined, cardiovascular abnornaiities prevailed C .95 ter cent of the nontuherculous . - - Condensed frca Authors' ; lunaary 5o Asbestcsis; Analysis of Forty Uecrcusied Cases. IT.M. Lynch, and Lis. Chest 1-, p. oTl Upco). The authors retort an analysis of 10 cases in vhich asbestcsis vas at necropsy. Cases are divided into ninor, nediun, and advanced -'-9- advance of the disease py-1 the p-rcninence of ascestcsia. bodies shoving a direct relation to the duration of exposure. In 1 of H cases of advanced grade, pulncnary- tuberculcsis vas the prinary cause cf death. Only in cases of recent exposure vas recent fibrosis found, this providing support for Gardner's belief that fibrosis does not progress indefinitely after cessation, cf exposure. Presence of asbestosis bodies is not invariable in erperinentally produced asbestosis, but is nore typical of hunan asbestosis. Lung danage occurs before the fornaticn of asbestcsis bodies, vhich nay represent an attenpt by the tissues to segregate the particles; they persist in the lung indefinitely, Pleural fibrosis is an outstanding, though not invariable, feature of asbestosis: the reason for this is not clear as the particles dc not reach the tleura. The occurrence in asbestosis cf noduler _fibrcsis of silicotic type, vhich ring And others have produced experinen- taily, vas coniimed in 3 cases. Caroinona of the lung occurred in three out of -0 cases--an incidence of 7.5 ter cent, vhich i3 seven tines greater than general incidence--ail in cases of nediun--or advanced grade--asbea- tosis. This figure is in accordance vith the exterience* of other vcrhers, and calls for further study. Tuberculosis occurred in 3 lx cases, but it is suggested that this incidence i3 not significant; this is not quite con vincing. Gardner stated that experirentai asbestosis dees not predispose to tuberculosis. (Unfortunately the occupational histories of these cases are net comiete). -- Brit. J. Ir.d. lied 57 Ant ih lot.anlr.es in the Treatneat of the Ccmcn Cold. A Preliminary Penort. J.W. Middleton and jTa. Rider . Pis . o: ^hest. 67S-6o^ Tlec . 19^9 ). (l) Sixty-three cases of the ccncon cold vere treated vith art ihistanines and 29 vith placebos as a control .(2) There appeared to be a definite