ABO Discrepancies

Question 1

Front Type
A- 4+ B- 4+
=AB

Back Type
A- 2+ B- 0
=B

Answer 1

22% of group A are in a subgroup A2 and produce anti-A1

Conclusion: type A2B individual that produces anti-A1

Question 2

Front Type
A- 0 B- 0
=O

Back Type
A- 0 B- 0
=AB

Answer 2

immunocompromised- elderly or newborn

Conclusion: type O but immunocompromised- no antibodies

Question 3

Front Type
A- 4+ B- 4+
=AB

Back Type
A- 2+ B- 2+
=O

Answer 3

weak reactions on reverse type- cold agglutinins

Conclusion: type AB but cold agglutinins
*warming the serum before repeating my eliminate discrepancy

Question 4

Front Type
A- 4+/0 B- 4+/0
=MIXED FIELD- AB & O

Back Type
A- 0 B- 0
=AB

Answer 4

MF reaction= two different populations of cells

Conclusion: type AB, but has received O units

Question 5

Front Type
A- 4+ B- 2+
= AB

Back Type
A- 0 B- 4+
=A

Answer 5

weak B reaction in reverse type

acquired B, “GI” involvement: gram negative bacteria chops off piece of terminal sugar that defines A antigen

Conclusion: type A, but has “acquired” B type due to a GI problem