A, septicemia occurs with transfusion of blood contaminated with microorganisms. Signs include chills, fever, vomiting, diarrhea, hypotension, and development of shock. Hyerkalemia causes weakness, paresthesia, abdominal cramps, diarrhea, and dysrythmias. Circulatory overload causes cough, dyspnea, chest pain, wheezing, tachycardia, and hypertension. Delayed transfusion reaction can occer days or weeks after transfuison. Signs include fever, mild jaundice, and a decrease hematocrit level.