13 exposed males of the sameage(see Table 6). How- with the lymphocytes, the platelet counts-are the highest yet attained since exposure. However, the ever, the other blood elements in this group of males do not appear lower than in the unexposed group. A general anemic tendency in the Marshallese (combined exposed and unexposed groups) is borne out bythefinding that 78% of the females have hematocrits of 36% or less and 54%of the males have hematocrits of 38% or lower. unexposed group also showed an increase in mean platelet count compared with last vear; but the exposed group levels arestill significantly below the unexposed (males, <10, —16%; >10, -11%; and females, all ages, —9%). This is also borne out by the following findings: (1) 22% of the exposed group havelevels below 250,000 compared with only 7% in the unexposed people; (2) the scattergrams (Figures 13 and 14) show more counts below than above the unexposed mean curve in Counts in the Ailingnae group. From Table 4 it can be seen that the counts in the 18 people of this group averaged nearly the same for the various blood elements as did the counts in the more heavily exposed group. Lymphocyte levels and both sexes; and (3) the accumulative percentage distribution curve (Figure 15) is displaced to the left of the unexposed curve.” however. These same differences were noted at crit levels showslittle difference between the exposed and the unexposed groups. and neither peripheral blood counts. lower levels were found platelet levels in the males wereslightly lower, the time of the 3-year survey. Erythropoietic function as evidenced by hemato- Individual counts. group showssignificant changesince last year. In reviewing the individual in more exposed individuals than in the unex- The exposed males >15 years of age continue to showslightly lower hematocrit values than do un- posed group. Those showing generally lower counts in the two groupsarelisted in Table 7. "Fable 4 Ailingnae Group and Control Mean Blood Counts by Day and by Age WBC (x10 *) Lad fr ed ae) mo C1 3 7 10 12 15 18 22 26 30 33 39 43 47 31 34 6-mo survey l-yr survey 2-vr survey 3-vr survey 4-vr survey Mayuro controls Rita controls, 2 yr Rongelap controls, 3 yr Rongelap controls, + vr Lymphocytes (x10°4) Platelets (x10*) Monocytes (x10 7) Male Male Female Total <5 “>5 <5 “5 <5 “>5 <10 S10 allages group 6.0 5.5 6.3 6.3 7.1 -68 8.9 84 9.6 77° 7.5 6.9 7.30 8.4 4.6 7.7 1i.1 11.0 12.1 115 13.2, 14.1 98 11.2 7.0 6.8 7.3 7.6 70 7.8 8.7 70 86 78 6.2 6.5 6.7 6.3 63 6.5 78 9.1 70 75 9.7 38.9 69 80 3.0 — 4.2 18 2.3 29 5.3 48 5.3 3.3 29 2.7 3.5 3.8 2.8 4.8 42 49 55 286 4.8 7.0 40 40 5.0 — 4.2 47 45 5.0 53.4 4.4 6.2 5.2 4.2 3.6 3.8 3.6 3.5 3.9 4.7 5.1 3.9 3.7 48 4.4 3.4 3.6 28 — 19 3.1 4.20 3.5 2.7 3.2 3.7. 3.5 +7 3.9 3.40 4.0 3.2 27 65 4.8 5.6 7.0 740 5.6 47° 6.2 22 — 22 2.2 22 2.4 2.9 2.2 2.0 2.2 #19 2.7 2.7 2.2 25 2.2 53.6 3.2 2.6 3.3 4.1 3.6 2.9 3.7 — — 22.5 — 29.0 27.5 23.5 20.0 19.5 24.0 26.5 28.0 27.0 32.0 37.0 25,2 38.7 51.2 40.8 33.2 41.2 35.5 32.6 38.8 — — 22.6 — 20.2 21.7 17.0 13.8 12.8 15.8 20.8 19.6 20.0 18.2 19.8 19.2 21.4 17.4 22.4 24.7 25.8 24.2 26.9 30.7 — — 20.9 — 24.6 24.9 22.9 17.4 18.2 22.7 27.0 25.3 26.1 25.0 23.8 23.9 28.3 26.4 31.2 33.6 36.5 31.2 30.0 34.0 — — 21.5 — 23.9 24.3 21.3 16.7 16.8 17.6 25.2 24.0 24.5 23.9 24.2 22.7 27.5 26.7 — — 33.4 29.5 — — aw! Postexposure day Neutrophils (X10 ") <5 >5 0.8 1.6 _= 3.8 2.1 3.4 3.8 3.7 2.6 2.3 15 15 2.4 2.3 2.4 hs ee 2.8 2.2 1too47 06 1.4 2.2 9 27 28 15 1.9 1looLA4 100 1.1 3.6 1.4 3.0 0.7 2.2 11 2.0 2.0 b4 15 14 07 2.3 1.1 Eosinophils (x107) <5 “>5 05 O04 — 2.6 1.6 44 26 2.3 14 3.2 2.3 5.8 24 0.6 1.6 +1 2.0 6.0 1.9 2.7 1.6 28 0.6 1.5 07 2.2 1.0 18 08 13 2.2 1.7 22 9.6 64 3.3 3.7 12.6 4.2 95 47 12.8 6.6 6.2 4.0 7.0 45