The complement fixation test uses red blood cells as the target for complement activation. Test serum containing antibodies is combined with a known amount of antigen in a tube, and then the RBCs and antibodies against the RBCs are added. A positive
result for the complement fixation test would be
A) a line of precipitate near the bottom of the tube.
B) a cloudy solution in the tube.
C) loss of color in the tube.
D) a fluorescent precipitate.
E) a solution that is clear due to precipitation of RBCs.
B
Bloom's Taxonomy: Application
Section: Serologic Tests That Use Antigens and Corresponding Antibodies
Learning Outcome: 17.9, 17.16
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