[Hemolytic transfusion incident caused by a Kidd-antibody, anti-Jka]

A severe haemolytic transfusion reaction due to anti-Jka, is described. The antibody was not detected in the cross-match test in saline and 22% bovine serum albumin after incubation at 4, 20 and 37 degrees C. This observation shows that the indirect antiglobulin test (= indirect Coombs reaction), which is able to reveal such antibodies, should be routinely performed in all cases with a history of transfusion and/or pregnancy.