Abstract
Neonatal ducks and chickens are exposed to a wholebody X-irradiation ranging from 100R to 3, 000R at a dose-rate of 185R per min. Lethal doses to 50% in 30 days are estimated to be 500R for the ducks, while 800R for the chickens. The ducks appear to be much more radiosensitive than the chickens. Histopathological observations of various organs of the exposed specimens after death reveal remarkable alterations: Particularly lymphoid organs are affected much more in the ducks than in the chickens at lesser doses than 1, 000R.
