The U.S.Food and Drug Administration convention when performing pour or spread plate counts is to count only plates with ________ colonies.
A)1 to 10
B)50 to 100
C)500 or more
D)25 to 250
E)30 to 300

Question

Quizplus · Accepted Answer

The U.S. Food and Drug Administration (FDA) convention for performing pour or spread plate counts is to count plates that have between 25 to 250 colonies, as this range is considered optimal for accurate enumeration without significant overlap or underestimation of colonies.

The USFood and Drug Administration Convention When Performing Pour or Spread