58 WESCTOLOGA udwseYATIONS fall te reach « lew Uf sappeenimately 68 percent of contre! levels at the end of the ath week. The veiue then returned to approximately the centrol level at the start of the 7th week, fol- lowing which a second depression was noted. The platelet counts were at a level of 80 percent of the control value at the time of the last ob- The cosinephile count in the older age in- dividuals, (rroup L, rose from very low levels observed on day 3 to values approximating 35 percent of control during the second week, where it remained from the 4d to the 5th week (Fig. 4.7). The counts then decreased servation during the 8th post-exposure week. 4.35 Momecyws aad Eosinophiles, All Groups From Table 4.2 it is seen that the men» mono- cyte count for Group I rose abruptly from an early value below control levels to a well-defined peak on day 12, following whichit fluctuated at values below the control level for the duration of the obeervation period. * A similar time trend was noted in Groups IT and HT. Table 4.7.--Group Il Ailinginae Meas Blood Couass at Time of Maximum Depression = — —-—- Age Leas Thaa 5 we ‘womc. | Phatetets | Cam No 6 8 44 | from (Average | (Average Dey , . — ete 5 from Day Bt 9750 8, 350 4,570 . 215 185 180 ‘‘eutro = Lympho- pete (Avernar Ww Sl ww Sh from Day . from Dey 3,470 ° 5. 600 3,520 4, 350 2,350 2,070 Age 6 to 15 48 53 Sl 6, 220 6, 170 4, 700 210 240 240 2,970 3,700 2,320 3, 150 2, 500 2, 150 Age Greater Than 15 ee 1 16 28 29 at 6.170 | 4,670 6, 270 6, 750 5, 650 175 195 115 115 145 3,570 2,200 3720 4,100 2,050 2, 2, 2, 2, 2, 370 270 270 7@0 450) 41 43 45 20 51 54 5, 120 6, 150 5. 650 7, 0S) 7,750 12, 40 110 215 180 95 We 106 3. 050 2, 270 4,700 2, 000 $170 01, 470 4470 2. #00 4,620 2.9350 ae ee 70 5, 070 185 400 1. TSO | e . a =os#& eos? OO Or 8 oo re = Frovan 4.7.—erial ensinophile counts om thoeor less then end greeter then $5 yrare of age of (iroup I (Rongeiap). (p>0.01) and remained at a value approxi- mately 15 percent of control throughout the remainder of the study. The time trend of re- sponse was similar in the younger age individuals, however chanyes in the younger age group were relatively greater if considered in terms of the control values. Similar trends in eosinophile count were not evident in other exPosture proups. It ix possible that the rise in) eosinophiles represents that reported by Minot and Spurling (11) as occurring “——- twoto three weeks after short wavelength irradiation”. 4.36 Hematocrit, All Groups The hematocrit values for all exposed groups are shown in Table 4.5. When hematocrits were tira clone on the 2d day, meen values for (groupe DP and EP] were below thoer of the control population. A significant trend in values after this Cane could not be detected statudically.

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