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Experimental Production of Totally Anaemic Newts

Abstract

ADMINISTRATION of phenylhydrazine to birds and mammals causes severe haemolytic anaemia almost simultaneously accompanied by a compensatory erythropoietic response in the bone marrow. Although this procedure has often been used to obtain large samples of immature erythroid cells, no comparison has been made between the erythropoietic response stimulated by phenylhydrazine treatment and normal red blood cell (RBC) formation. Our intention was to make the comparison in the newt, Triturus viridescens, but although phenylhydrazine produced haemolysis and severe anaemia shortly after injection, there was no immediate erythropoietic response. Instead all erythrocytes were rapidly destroyed. The complete lack of erythrocytes persisted for approximately 2 weeks before any signs of RBC formation were observed. During this time, anaemic animals survived without great difficulty.

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GRASSO, J., SHEPHARD, D. Experimental Production of Totally Anaemic Newts. Nature 218, 1274–1276 (1968). https://doi.org/10.1038/2181274a0

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