A third example of the blood group antibody anti-k.

Levine, Wigod, Backer, and Ponder (1949) and Levine, Kuhmichel, and Wigod (1952) have described two examples of an antibody, " antiCellano," which reacts with all blood samples except those from individuals belonging to the rare genotype KK. The first example was found in a woman whose infant had mild haemolytic disease of the newborn; the second was found in a patient who had received several transfusions. The first serum agglutinated red cells suspended in saline, reacting most strongly at 370 C.; the second serum gave weak agglutination in saline but gave distinct reactions when the indirect Coombs test was used. The present note records the detection of a third example of anti-k.