Hematological Effects on Heavily Irradiated Japanese Fisherrra Oocytes of the fishermen , Stable cells of _/y — S 0.14 (1 10) and morphological abnormalities of spermatozoa were also observed. cells °4 (516) —_— 1.20 (6,10) 2.11 (9 12) Indica- tions of recovery were observed in some cases alter about one sveer. but mostly\ ‘ first signs of regeneration did not show earlier than about 2 years after cxposure, with following production of children, unstable n TI (i )* 0.14 (1-10) 0. 46 (3,13) 0.45 (5 15) 0.56 (6 i6) SUMMARY The hematological changes of Japanese fishermen exposed to fallout in 1954 were reported with other findings. Generally speaking, it is difficult to estimate correctly the exposed radiation dose soon after the accident. Therefore, treatment of heavily irradiated persons should be decided by the daily appraisal of clinical and laboratory findings. From this point, hematological changes are an important information G. 67 (4 10) 0.74 (6 12) to decide the therapy which should be given to heavily irradiated subjects. As to the Japanese fishermen, it seems to be very important as well as necessary to detect the significance of subtle changes such as they are still er of cases esamined, observed in hematological and cytogenetical examinations. vere observed (Table 2) . REFERENCES smarkably higher than Auano, S. (1953): Genshi Bakudan Saigai Chosa Hokokushu. H, 914. Gakujutsu Shinko Kai, Tokvo. tat stable abnormal ities ition ...67 per cent se 29 per cent one eo 1...4 per cent to the Ph! ch romo- SOE EE rte HOEBBO y ‘Ups according to the -alues of neutro phils mean values ofsta ble * extent of the ini tial onded to the esti mat- e observed in 5 Cases. -alities. While stable otypes of their own, Nihon AnpDrREWws, G.A., SITTERSON, B.W., KretcHuMar, A.L. and Breuckr, M. (1961): Diagnosis and Treatment of Acute Radiation Injury, 27, World Health Organization, Geneva. Cronkite, E.P., Boxp, V.P. and Dunnam, C.H. (ed.) (1956): Some Effects of lonizing Radiation on Human Beings. U.S. Government Printing Office, Washington, D.C. Guskova, A. K. and Baisocorov, G.D. (1956): Proceedings of the International Conference on Peaceful Uses of Atomic Energy, 11, 35, United Nations, New York. HasTeR.ik, R.J. and Marinewu, L, D. (1956): Proceedings of the International Conference on Peaceful Uses of Atomic Energy, 11, 25, United Nations, New York. HemPeLman, L.H., Lisco, H. and Horrmax, J.G. (1952): Annals of Internal Medicine, 36 279. TsHrHARa, T. and Kussarori, T. (1965): Acta Haematologica Japonica, 28, 291. IsmuHaRa, T. and KuMatorr, T. (1967): Human Radiation Cytogenetics, 144, North Holland Publishing Co., Amsterdam. -aryotypes, Isunarna, T. and Kuxtatoni, T. (1969): Japan Journal of Genetics, 44, Suppl. 1, 242. JamMetT, H.P. (1961): Diagnosis and Treatment of Acute Radiation Injury, 83, World Health Organization, Geneva. ularities with he ma- Kikucut, T., Waxtsaka, G., Akaci, H. and Goto, H. (1954): Bulletin of the In- ‘Mum numbers we re Kimura, K., Minami, E., Honpa, M. et al. (1956): Research in the Effects and Influences of the Nuclear Bomb Test Explosions, I. 497, Japan Society for the Promotion of Science, Tokyo. z0a is described fo r nya Se eeeeepanewete owering of mobility stitute for Chemical Research, 4, Kyoto University, Kyoto. { i