cytes and platelets and by possible residual ctfeets on hemopoiesis indicated by a Lag in recovery of blood elements ta the levels of the anes posed population. The development of a fatal case af leu. a 11 1 e e came into use (Coulter counter and General Sei ence Tacma-Count MIR So oand APR 4 instru. ments). ReGculoevte and bone marrow examina Hons have been done on several occasions bystan: dard procedures, * . Oe 21 Ww he Tel Vane 2s Meo *Mr. NL McDaniel at SUNY at Stas Hook dias thone the caf ferential counts fae the past several years. Pedr Wl Maloney amd Mig fb. Pullin at Pharvard Merlical Se lved dadthe aikaline phisaphatase stacmeng of seutregohals in penpierad blood ster ars. dh WS. Muabere, Inainue foe Gamer Research, Phila. delphia, did the stiches foe Australis aatigens, Pr Derren Fo a me eet Pe re remem ee ne ees mene ‘ > . 1 . . . N Woohoo oS dR dt TH Mt Vears Vite alter expemare . i 1 , - * Kongelip peeple from the tine eb exposure dieeugh AF . : i Vrs pel OA posure, SLin represen mead Vales al coi, preaerese ben poe opaunlastaa ny, 1 ' . i ! DL ae meem ee 7 oe = yKoe foe 5. : : Bin = = 2: " 7 oon J Pty<tye De ee CL ee he es ‘ ' 4 ‘ voter Vhavs ‘ ecr * hy wet Uk and eld Pe ee| | Ss Ma tee rT otwk,’ tee ee Cd Cs ror 2 wots oe eB bt It LU AD Veun Vine atler eaypsmure : 7 Figure th. Mean by urphocs te countsad Rengelap people ftom time of oxpesare Uhroagh 20 vers pam expenuie, Star noprescntcai values al coiiparisen population, United States. These studies are further discussed in tater sections, where reles ant. lur the entire 20 years. Figure 1 shows the cu- in7 uy Figure 102 Mean neutrophil and white cell comaut of Plasma and red cell samples have been brought back for special studies in laboratories in’ the vroup over the 20-vear perkal Data are listed in Table 12 for the past 3 vears, and in Appendix 6 ; Neutiayp aia _ analvsis for Australiaantigens}," studies of red cell and plasma volume, chranosaiie asalysis, ote. group are compared with those of the unex pascal 5 Vien 3s : alkaline phosphatase staining of neutrophils," * combined (Rongelap and Ailnunae) exposed es Wee ea be oe Se ea ete Lee tions over the vears have iacluded tests fur lou. kena (ie., special scanning of blood smears lor imitature forms, basaphil counts in 400 ectls, la Figures 10 to $2 the meas blood counts of the br ; to A bumber of special hematolagical examina: 2. Recovery of Hemapoiesis re + Jae 1. Procedures done under a microscope unl clectranie means bp aetna * yh er ‘be Sesee, Bey ow t th kena may alse be evidence of residual ctloct Uniil 1972 yearly measurements were made of peripheral blood elements, iae tuding WBC, dillerential white counts, RUC and hematocrit and/or hemoglobin, and platelet counts. Since a case of leukemia was found in 1972, such measurements have been made twice a vear. The counts were hr & Paruhin view a aa i Te : ¢ Pi Leeper temp prota ; Since Llood-forming cells are among the most radiosensitive cells in the body, hematological examinations have been empbusized in both exposed and unesposed populations. Evidence of such wusitivity in the exposed Rongelap people was provided by the early acute depression ofteuko- 4 Leuk view and ocutepdb x 4 C. HEMATOLOGICAL FINDINGS Wiper cecn cw tees pew te ees b “ . + = . x Ue =" ape c AWAY, Atty Fetnales * oo ee ‘~* pee a Vv a To ™. Miasles (ute 7 10} . ae at * Mb-dd bee ee OR ZE MW wth be bad bh ke ee Fa Pe, Lk wo Dass Figure Mar Vs 42 14 fone ow ous It 1H Vearn ‘Vine alter exjemure 12, Mean platelet count of Ronuchip people fran linueateq sore through 20 years post expesure. Steps re1* Recent ita Couns of aes posed comparison popu tions, ‘ : ) .