48 EERECTS ok 4 ZING reached. The count ais taaintarmed ato proximately 7) perce tof contre) eiaoues fren, the Tth week tothe ene ot the imaitia: sti No further recover. Although both we ceonps followed the -:0ne general tine parrery fresponse, the ower aie group was below toaroot che older throughenrt most of the observatioa period, Ae l2 menth- the granulocyte. diac returned to tae cantre) range. Frm ttrecrn frre peeee CONTROLS «GROUP A-LEUKOCYTES — . sae evident ab G martes QADLATION ” . wy : ee ee ee “ GROUP T eae ee ed _Sukocy tes, Neutrophiles, 3 4 dL The absolute vimproeste count of the olaer age group (Fig tz) aad fatlen py the Sdooiy control Phi to a value approx omiatels group. of percent af ne vase was minted throughout the <tudy. und there was no letin te evidence of an uowir toene diirng the gaa al ar 6 month stiecie. VA 2 ottomths, comibeiete The yaiies fers is younger age group diseva © fell before the ad day toa value voproxcmitely 25 percent of the control, followin @ witea there was a si@niieant upward trend Wet che total ivmphoevte count, there is consestent litference eta een recovery lind tot ocene ret the twoaye grav ps Towever. durinthe tust 4 weeks the difference os accentuated woen eX pressed as perce ot cdecoedse beeause of the rec tively high Iymiehoevre levels in the lawer ye control group. vfter ‘his period the differences expressed as percent’ ore less marke since 4 8 : FLeee — - n 6 - weee TONTROLS GRCUF 2 = ¢ Bo — - .- a arg AGE Su3a “y po. eae / - a Re 0 8 caeae 6 FIGURE 4.2. —-Neret firaup and a greater thes ” wae i katte 5 Me uo. AGE > 491, . . oe ne ee oy uamoeute Pee wort a, ma eng 3 “a, ag eOST + KPOSURF AY boot Beamer PEdR £> —fteamperafive “ineun tute overy a0 rate Se fe ty | aA 68S Pepa 48 56 64 72 85 EXPOSURE DAY oentrophie, verind changes in and liarphoente the total county mm oo ete e than 3 weary old, Croup f ( Rongelap). vas more rapid in the younger age UPON), Vhe cellalar elements chiefly responsible for tee fluctuations in total white blood cell count on be deterrimned by comparing the total white, eurrophile ind iymphocvte counts (Fig. 4.3). Thos seen that the lymphocyte count remained essentiadly constant throughout the period of ads, while the total neutrophile count thaectusted] vita a pattern essentially identical to that the total white blood count (coefficient of Thus the fluetuations in Tt can be seen from cstenthy erenter than the Iymphoeyte count in ¢ ghee ONTROLS GROUP A- AGE 5 —— 5 aT | 3l 42 POST litle d.2 that the neutrophile count was con- , Ww = a4 Wad sounger age groups. Lymphocytes ~ =~ | 6 ‘oral coun sere clue to changes in the neutropare count. Thais was true of both the older GROUP | | 5 arreation of fy —-. ak * anart o eat the ode: age group. In the younger groups, differences ta the neutrophile and Lymphocyte aint were ess marked and frequently the viipaecyte count was greater than the neutrobaile carne Platelets sere first counted 10 days after exposare, af wtuch tune phluelet values of the fomues vere approximiitely 60 percent of the prop oate control group: Fie. 4.4). Follow-