The results of a titration showed 2+ positive reactions at 1:2,1:4,1:8,and 1:16 dilutions;1+ positive reactions at 1:32 and 1:64 dilutions;and a negative reaction at 1:128 dilution.What would be the titer result reported?
A)16
B)32
C)64
D)128

Question

Quizplus · Accepted Answer

The titer is the highest dilution at which a positive reaction is still observed. In this case, the highest dilution with a positive reaction is 1:64, so the titer result reported is 64.

The Results of a Titration Showed 2+ Positive Reactions at 1:2,1:4,1:8,and