Early effects of whole body irradiation on cholinesterase activity in guinea-pigs' blood, with special regard to radiation sickness.

Male guinea-pigs suffered a loss of cholinesterase activity in plasma amounting to about 30% during the first two days after whole-body roentgen irradiation with 400 r. No changes in the activity of acetylcholinesterase in erythrocytes to be ascribed to the irradiation could be demonstrated during the first two days. A routine method for determination of the cholinesterase activities has been tested but is found less suitable as a diagnostic tool for the early recognition of the effects of irradiation.

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