While Performing an Antibody Screen, a Test Reaction Is Observed

question 70

Multiple Choice

While performing an antibody screen, a test reaction is observed that is suspected to be rouleaux. A saline replacement test is done, and the reaction remains. What is the best interpretation?

• A) The original reaction was rouleaux and may be ignored.
• B) The replacement test is invalid and should be repeated.
• C) The original reaction was due to true agglutination.
• D) The antibody screen is negative.

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