% . ~ ° : aes oe = . 4 Ss wena? 3 monte ~ ° ‘ . . ” . . . ANIMAL STUDIES . 5.3 . . . . errr Sy x wey ey eres wh: yi sy Re aye The studies on the Rongelap and Uttrik animals included measurement of internal radioactive contamination and radiochemical analysis of excreta and tissues. The acule hematologi cal and pathological effects of the exposure, as well as long term effects on these animals, are being studied. In addition, fertility and hatchabiltty studies as well as radiochemical analysis of eggs laid by hens from Rongelap were performed. These studies have provided information on the extent and nature of the internal contami. nation in the expesed human beings. For example, radioautographs of animal bones prepared by NRDLand Argonne National Laboratory®(Figs. 5.3 and 5,4) indicate the pattern of skel. , etal distribution of fission products, particularly the high concentrations of radioelements in the epiphyseal region of the long bones. Further, information on these animals (which received a much higher external radiation dose than was received by the native group and over ee 10 times the internal deposition) should be of considerable prognostic value for the human p¢ vo 1 aby 4 beings. Autoradiograph of Rongelap Chicken Tibia, 1% x, 21 hr Exposure. Animal Sacrificed ee eaerecone mn . aoe . | 45 Days Post-exposure (Argonne National Laboratory Photo). aeeooe ~* Fig. 5.3 |