Accession Number : AD0684436

Title :   HEMATOLOGICAL RESPONSE IN SHEEP GIVEN PROTRACTED EXPOSURES TO 60CO GAMMA RADIATION,

Corporate Author : NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF

Personal Author(s) : Still,Edwin T. ; Taketa,S. T. ; Ainsworth,Earl J. ; Leong,George F. ; Taylor,James F.

Report Date : 26 MAR 1969

Pagination or Media Count : 23

Abstract : The changes in the total leukocytes in sheep irradiated with cobalt-60 gamma at a rate of 1.9 R/hr have been determined. After 50 R total exposure, maximum depression occurred 24 hours later. After 100 R or 175 R, maximum depression occurred within one hour. Recovery to control values was seen by 8 - 9 days for all three exposure groups. The recovery pattern for the circulating leukocytes was qualitatively the same for each of the three groups. An early lymphopenia was seen in all the groups, with recovery to the normal by 5 - 8 days. The percentage of neutrophils was greatly increased during the first 5 days. The data indicated that total leukocyte counts may not be a reliable means of predicting the exposure an animal sustains under protracted irradiation conditions. (Author)

Descriptors :   (*RADIATION EFFECTS, *HEMATOLOGY), RADIATION DOSAGE, RESPONSE(BIOLOGY), EXPOSURE(PHYSIOLOGY), LEUKOCYTES, MAMMALS, RECOVERY, BLOOD ANALYSIS, MORPHOLOGY(BIOLOGY)

Subject Categories : Radiobiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE