Recovery of blood group antibodies from erythrocyte powder.

I N A PREVIOUS PAPER,’ experiments on the application of erythrocyte powder in serologic laboratories were described. It was shown that erythrocyte powder may be successfully used for (1) absorption of useless and disturbing antibodies from test sera, (2) complement fixation test with strong group antibodies, and (3) preparation of “pure” antibodies by elution from the sensitized powder. The aim of the present investigation is to determine whether normal autoantibodies could be recovered from unsensitized erythrocyte powder and to examine some of the properties of anti-A, anti-B and anti-Rh antibodies recovered from the sensitized powder.