When a medium needs to be quality controlled because it was prepared in-house or because it is complex, all the following rules must be followed except:
A)only media not specified in Clinical and Laboratory Standards Institute (CLSI) guidelines should be tested.
B)the medium should be tested for sterility and pH.
C)the organism selected for quality control testing should represent most fastidious organisms for which the medium is designed.
D)testing techniques should be different for primary plating media than for biochemical or subculturing media.

Question

Quizplus · Accepted Answer

All in-house media must be tested for pH, sterility, and positive and negative reacting organisms-that is, if a medium should inhibit a specific organism or group of organisms, it should be tested with those organisms to ensure it "works." CLSI guidelines give specific guidance as to what type of quality control testing should be performed on media prepared in-house.

When a Medium Needs to Be Quality Controlled Because It