Radiobiological aspects of high altitude flight: relative biological effectiveness of fast neutrons in suppressing immune capacity to an infective agent. [Mice]
Technical Report
·
OSTI ID:6503562
The authors investigated the relative biological effectiveness (RBE) of fast neutrons compared with x rays in impeding development of immunity to an infective agent, the intestinal cestode Hymenolepis nana. Mice were irradiated with neutrons or x rays and 2 days later given an immunizing dose of H. nana eggs. After another 2 days, the mice received a challenge dose of the eggs. Challenge egg doses were also given to sham-irradiated unimmunized and immunized controls. All mice were killed 90 to 92 hours after challenge, and the H. nana larvae (cysticercoids) that developed in the intestinal tissue were counted. An increased cysticercoid count in the irradiated mice, as compared with the count in unirradiated immunized controls, reflects suppression of immune capacity by the radiation. The results indicate a neutron RBE of 4 at 50 and 101 rad.
- Research Organization:
- Energy Research and Development Administration, Washington, DC (USA). Div. of Exploratory Research
- OSTI ID:
- 6503562
- Report Number(s):
- AD-A-053204; FAA-AM-78-8
- 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
BARYONS
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
CESTODES
DISEASES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FAST NEUTRONS
FERMIONS
HADRONS
HELMINTHS
HYMENOLEPIS
IMMUNE REACTIONS
IMMUNITY
IMMUNOSUPPRESSION
INFECTIOUS DISEASES
INVERTEBRATES
IONIZING RADIATIONS
IRRADIATION
MAMMALS
MICE
NEUTRONS
NUCLEONS
PARASITES
PLATYHELMINTHS
RADIATION EFFECTS
RADIATIONS
RADIOINDUCTION
RBE
RODENTS
TREMATODES
VERTEBRATES
X RADIATION
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
BARYONS
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
CESTODES
DISEASES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FAST NEUTRONS
FERMIONS
HADRONS
HELMINTHS
HYMENOLEPIS
IMMUNE REACTIONS
IMMUNITY
IMMUNOSUPPRESSION
INFECTIOUS DISEASES
INVERTEBRATES
IONIZING RADIATIONS
IRRADIATION
MAMMALS
MICE
NEUTRONS
NUCLEONS
PARASITES
PLATYHELMINTHS
RADIATION EFFECTS
RADIATIONS
RADIOINDUCTION
RBE
RODENTS
TREMATODES
VERTEBRATES
X RADIATION