Abstract
Only two cases of hemolytic disease of the newborn caused by anti-Jk^a have been published. The first case, reported in 1951 by Allen, Diamond and Niedziela [1], was thought first to have been due primarily to the anti-Kell that was present also in Mrs. Kidd’s serum. Later, baby Kidd was grouped Kell negative so that now the anti-Jka is considered to have been the cause of its hemolytic disease. The second case was reported in 1956 by Greenwalt, Sasaki and Sneath [3]. In neither of these cases did the baby require exchange transfusion. Other examples of anti-Jk^a have been reported [2, 4-15], wich have been stimulated either by transfusion, pregnancy or by transfusion plus pregnancy. In most cases the anti-Jk^a has been accompanied by other blood group immune antibodies. In a case reported by Hunter, Lewis and Chown [6], anti-Jka appeared in the serum of a woman during her first pregnancy, but the baby was normal at birth. The mother had never been transfused. In the case which we describe the baby developed kernicterus and was given an exchange transfusion.