A blood sample from a 90-year-old man was submitted to the blood bank for a type and screen before surgery.The forward type demonstrates as a group A,whereas the reverse type appears to be group AB.What is the most likely cause of the discrepancy?
A) Contaminated reagent antisera
B) Rouleaux formation
C) That the patient has autoantibodies
D) That patient has low-titer isoagglutinins

Question

Quizplus · Accepted Answer

In patients who are older,the level of ABO isoagglutinins can be below detectable levels.

A Blood Sample from a 90-Year-Old Man Was Submitted to the Blood