Match the Cause of a False-Negative Agglutination Reaction with the Appropriate

Multiple Choice

Match the cause of a false-negative agglutination reaction with the appropriate corrective measure.
-Postzone phenomenon

A) Dilute patient's serum and retest.
B) Wash cells according to directions; use positive and negative quality control (QC) steps.
C) Repeat blood specimen should be collected a week or more later.
D) Calibrate centrifuge to proper speed and time.