On a serial dilution with the following tubes set up,1:2,1:4,1:8,1:16,1:32,and 1:64,there is no visible agglutination in the 1:64 tube.What is the titer of the antibody?

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Quizplus · Accepted Answer

The titer of the antibody is the highest dilution at which agglutination is still visible. Since there is no agglutination at 1:64, the last visible agglutination would have occurred at the previous dilution, which is 1:32. Therefore, the titer is 32.

On a Serial Dilution with the Following Tubes Set Up,1:2,1:4,1:8,1:16,1:32,and