A case of a non-hemolytic transfusion reaction with pulmonary infiltration secondary to leukocyte antibodies is described, and previously reported cases are reviewed. This type of reaction can be diagnosed at the bedside when a patient develops fever, hypotension and dyspnea within a few hours following transfusion of whole blood or a plasma product. The roentgenogram of the chest shows pulmonary infiltrates with a normal cardiac silhouette constituting non-cardiac pulmonary edema. To provide laboratory confirmation of this reaction, it is essential to search for leukocyte antibodies by both leukoagglutinin and cytotoxic technics, as well as to determine HL-A phenotypes of both donor and recipient. As the plasma products involved usually come from multiparous women, donor parity should be a routine question in the donor interview in transfusion services. To prevent this reaction, which may prove fatal, blood donated by women who have two or more children should be used for packed cells only.

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