Two additional examples of non-transfusion-stimulated anti-Kell.

We have recently encountered two additional examples of non-red cell-stimulated naturally occurring anti-Kelly antibodies in ther sera of two apparently healthy male blood donors. Neither of these donors was previously transfuse. Both antibodies were initially detected using a low ionic medium. Additionally, these two antibodies decreased in reactivity within a seven month period of time. Further documentation of these unusual cases may assist in the understanding of the Kell blood group system.