Response of the Bat (Myotis lucifugus) to X-Irradiation

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Abstract
Survival, blood, and histological studies were made in the bat Myotis lucifugus maintained in the laboratory at 23[degree]C and exposed to X-rays (500 to 50,000 r). Nonirradiated starving bats survived much longer early (November) than later (February and March) in hibernation. In November experiments dosages as low as 500 r significantly shortened the life span of starving bats, but in February and March, exposure to 500 to 20,000 r were followed by survival times similar to those of simultaneously starved controls. Leukocytes were depressed by as little as 500 r, but the erythrocytes remained unchanged even after 20,000 r. Typical irradiation effects were found in bone marrow, spleen, lymph node, and duodenum after dosages as low as 500 r. These findings are compared with those of other irradiated mammals and frogs in an effort to establish the radiosensitivity of the bat.

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