OS-21-1994 12:17 later. 5162e2%314 BNL-MED, DEPT. P.Q15 It 49 possible however that the intensely alkaline nature of fhe caleiun oxide when dissolved in perspiration might have contributed to the tial symptoms. About 2/3rds of the Fongelap group were nauseated during th and 1/10th vomited ard hed diarrhea. first two days One person in the Aflinginae grpup vas nauseated. No one in the 2ongerik or Ttirik group had gastrointestinal symptoms. CLINICAL CRSERVATIONS AND LEVROCYTE COUNTS Between Aho 33rd and the 43rd post cxposure day 10% of the individuals fron Rongelap nad an nbsoluto eranulecyte level of 1,000 per cuble millimeter or less, The lowest count during this veriod was 700 per cubic millimeter. ring this jnterval tho advisability ef prophyinctic administration of antibiotics was seriously considerel., However prorhylactic administration of antibiotics was fint instituted Tor +ha following reasons: 1) A2) intivédwels vere uber continuous malleal observat!pn sa that infection if it develoned wadd have been discovered in its eirller MUN TES « a ) Premature adainistration of entibsfotics aight have obgcuread medical amiications for treatment, ani might also hava led to the developmert + a of drug resis tant,organismy in individuals with lowered resistance to infection, 3) There vag no accurate knawladge of the number of gramifocytes required Yo man to rrevent infection with this type of granulocytoponia. The observed situation vas not strictly comparable to agranuldeytosis with mn aplastic marrow as sean following known lethsl doses of radiati In the latter instant, sranulocytes fall rapidly vith practically none in the cigenlation and no evidence of granulocyte regeneration when infection occurs. In anf present group of individuals exposed to radiation, most counts reached approximefely 1/4 the normal value, but the fall to that level was er:idual snd the presence of bmnature granulocytes in the poriphernl blood during the neriod of cranulocytopeniB of some new granulocyte production, was indicative The few individuals that recdived antiblotics had conditions that would have been treated with antibiotios in tHe absence of any

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