ACID dx? Los Alamos Conference on Livestock losses Damare to the skin of animals from radioactive fall-out has been recognized in horses during the last series of tests at the Hevada Provine Grounds and in cattle curing the Spring of 1952 teats. In both cases the animals were located within a few miles from tho site of detonation and in areas of relatively heavy fall-out. About the first of June, there wae reported incidents of sheep, originally grazing in Nevada, showing lesions and also about 11,00 ewea and 2900 lambs had died within the preceding few months. ‘The question was raised as to the possibility of radiation damage causing or contributing to the leciscns or deaths. The seme lesions were noted on sheep in areas of littis or no fall-out with approximately the same incidence ag in areas of relatively heavy fall-out. The genorel amounts of fall-out in the areas uncer question have been determined. fTheee quantities of radiation dosage exe not know to be sufficient to produce the lesions soted. Evidence has been gleaned from mleroseopic examinations and comparisons of tissues both from th: sheep in fall-out areas and some sheep on which akin beta curna were produced experimentally. All of these deta present a preponderance of evidence to support the conclusion that the lesions were not produced by radinactive fall-out. However, due to som anomalies in the evidence, 1t is recomended that studies be continued in order to determine the causative agent ani to explain its isolated occurrence. in considering radiation damage te the internal organs, the aost critical is the thyroid, due to the upteke of radioactive iodine fron the fall-out metérial, The emunt of hichest radiation dosage to the thyroid has been calculated to be far below the quantity necessary to produce detectable injury. eeB.Sadonen HM. Ae Holmes Arthur H, Wolff ¥. F, Lushbaugh R. Be Thompaett F. He Melvin US DOE ARCHIVES 326 U.S. ATOMIC ENERGY COMMISSION | RG! f . ion BEST COPY AV, AILABLE * i DOE Lkste, (eK (pe) Box Folder ee 33657 eZ/ ~ 13 -/1b MEDICINE, HEALTH & SAFETY DOS ARCHIVES