A patient has a hemolytic transfusion reaction to red cells that were transfused 8 days ago.  What is the MOST likely cause of the reaction?

What is the first step in the initial blood bank investigation of a suspected transfusion reaction?

Which genotype is associated with an individual who is heterozygous for big C?          

What is the deferral period following collection of a double red cell unit by apheresis?

The genotype for a given adult is: Hh, BO, sese, Lele.  Which of the following depicts this person’s red cell phenotype.

Match each blood group system with the appropriate description

Liquid red blood cells must be stored under controlled conditions that maintain the temperature at:

A female who is blood group type A (her mother is blood group type O) gives birth to baby boy who is blood group type B.  The baby’s father’s genotype can be any of the following EXCEPT?

During a donor interview for apheresis platelet donation, the donor informs the interviewer that they have been taking aspirin daily for the past two years until discontinuing the medication one week ago.  What is the most appropriate course of action to take at the present time?

Most frequently, the autoantibody in a warm autoimmune hemolytic anemia (WAIHA) shows specificity for: