37 6 T T T 2 oS Rac x10 5r 7 4b T T : . . ® ° a? | e ee e T / e x T RONGELAP UNEXPOSED !959 ea RONGELAP UNEXPOSED 1959 T . ° e* * 6 e* e e ° e e os %e e 4 e e af ; + 3 e 1 ! 10 2 20 30 6 4 Ld IO 20 } 30 i a0 ! L 50 690 L 70 | T —— 24 - 4 r 0:5 YEARS POST EXPOSURE @ = UNEXPOSED POPULATION J 80 * gh 22+ 20 T 7 Tt ; — MEAN OF 53 NORMAL AMERICANS AGE > 15 «--= MEAN OF 17 MARSHALLESE AGE > 15 tod dle. 1. -d4,-—4 PERCENT CUMULATIVE T PERCENT DIFFERENTIAL OF RED CELLS BETWEEN THRESHOLDS %e TOTAL COUNT 100 i 70 plotted against age at 5 years post exposure, 1959. Solid line represents mean values for comparison female popujation. 264+ T t 60 Figure 43. Individual red blood counts of exposed females 890 Figure 42. Individual red blood counts of exposed males plotted against age at 5 years post exposure, 1959. Solid line represents mean values for comparison male population. " oT 1 50 AGE (YR) AGE ( YR) To ! 40 ! 1 as | 49 4. 53 s7 13 20 23 30 35 40 45 30 55 THRESHOLD 60 65 70 75 80 RBC «10° Figure 44. Cumulative distribution curve, Rongelap red blood counts, 1959. erythropoetic depression compared with the unexposed levels, but not as distinct as indicated by erythrocyte counts in 1959. It would appear from these findings that some bone marrow damage persists at 5 years post exposure. The Rongelap people generally havea slight anemic tendency(very slightly microcytic) com- pared with Americans. The cause is unknown. Apparently it is not due to iron deficiency, since serum iron levels are generally normal. It may possibly be based on anothertypeof nutritional Figure 45. Price-Jonessizing of red ceils showing mean of 17 Marshallese curves (from both exposed and compari- son groups) compared with mean curve of 53 Americans. deficiency. The serum proteins and serum vitamin B,, levels, however, tended to the high. The continued high level of eosinophils is unexplained. It was not believed that the types of intestinal parasites noted on a previous survey could accountforit. Hematological Leukemia Survey Differential counts showed no increase in immature leukocytes that would cause one to suspect leukemiain either the 1959 or 1960 survey. Alkaline