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Health effects of low-level irradiation during development: experimental design and prenatal and early neonatal mortality in beagles exposed to /sup 60/Co gamma rays

Journal Article · · Radiat. Res.; (United States)
DOI:https://doi.org/10.2307/3577056· OSTI ID:7184448
; ;
As part of a long-term study of the effects of irradiation during development, prenatal and early neonatal mortality were evaluated for beagles exposed in utero at 8 days postcoitus (dpc), 28 dpc, 55 dpc, or 2 days postpartum. Mean doses used were 0,0.16, or 0.83 Gy. A decrease in whelping rates was observed for female breeders irradiated at 8 dpc. There was a significant decrease in litter sizes from female breeders irradiated at 8 and 28 dpc. Both of these findings are indicative of increased embryonic mortality. There was a significant decrease in the percentage of females born after exposures given at 28 dpc, indicating a differential radiosensitivity by sex. A significant increase in early neonatal mortality up to 14 days of age was observed for beagles exposed 8 or 28 dpc, again with an excess mortality in females.
Research Organization:
Colorado State Univ., Fort Collins (USA)
OSTI ID:
7184448
Journal Information:
Radiat. Res.; (United States), Journal Name: Radiat. Res.; (United States) Vol. 115:1; ISSN RAREA
Country of Publication:
United States
Language:
English

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Related Subjects

560152* -- Radiation Effects on Animals-- Animals
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
BEAGLES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COBALT 60
COBALT ISOTOPES
DOGS
DOSES
ELECTROMAGNETIC RADIATION
EMBRYOS
GAMMA RADIATION
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZING RADIATIONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LITTER SIZE
MAMMALS
MINUTES LIVING RADIOISOTOPES
MORTALITY
NEONATES
NUCLEI
ODD-ODD NUCLEI
PREGNANCY
PRENATAL EXPOSURE
RADIATION DOSES
RADIATIONS
RADIOISOTOPES
RADIOSENSITIVITY
SEX DEPENDENCE
VERTEBRATES
YEARS LIVING RADIOISOTOPES