[Elution of sensitized erythrocytes with chloroquine]

The results of erythrocyte elutions sensitized either in vitro or in vivo with a 15% solution of Chloroquine indicate that at a low degree of sensitization it is possible in more than half of the tested cases to release incomplete antibodies from the red cell surface without causing damage of the group receptors. This makes it possible to assess the phenotypes of the majority of erythrocyte characteristics, although some may be weakened by elution.