What happened to Jessalyn? Which blood type(s) could Jessalyn receive, why?

Question

Case Study

Jessalyn regularly goes in for blood transfusions. Jessalyn's blood type is A-. Normally her blood transfusions go well and her nurse, Traci, does a great job of double checking the blood type she is receiving. This time Traci is out of town and she gets a nurse who was able to skate through school doing the bare minimum and doesn't really care that much about his job. He doesn't double check the blood type for her transfusion and . . .The blood type was incorrect.

Answer 1

This nurse needed to make sure the Donor's blood type, antibodies, and antigens must be just the same as the receiver's.

The receiver Jessalyn is A-, which means the donor must have had blood type A with anti-B antibodies and with no RH factor (explained by the minus sign) to prevent blood incompatibility because it can be fatal.