Which of the following tests is used to detect the presence of weak or low-titer antibodies in a patient's serum?

A Indirect antiglobulin test (IAT) ✓
B Direct antiglobulin test (DAT)
C Enzyme-linked immunosorbent assay (ELISA)
D Flow cytometry

Explanation

The indirect antiglobulin test (IAT) is used to detect the presence of weak or low-titer antibodies in a patient's serum, which can help identify potential transfusion-related complications.

Source

Clinical and Laboratory Standards Institute (CLSI) guidelines
Hematology Hematology: Blood Grouping and Crossmatching Hematology: Blood Grouping and Crossmatching Medium MEDICAL Confidence: high