Hemopoietic regeneration in control and recovered heavily irradiated dogs following severe hemorrhage.

By VIcroR PERMAN, DALE K. SORENSEN, EDWARD A. USENIK, VI roR P. BOND AND EUGENE P. CRONKITE R EGENERATION of the bone marrow following single or repeated doses of radiation appears to be complete as evidenced by a return of blood counts to the normal range.”2 In the present studies, dogs given lethal doses of radiation and successfully treated with maintenance therapy one to tWo years previously”4 were stressed by severe bleeding, and the regenerative capacity of hemopoietic tissue as evidenced by the rate of recovery of blood counts was compare(I with control nonirradiated dogs.