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Mastering
What are two important things to remember when
obtaining an inoculum to do a catalase test? (Select the
two that apply)
You should never take samples for this test from a medium
that contains blood.
The presence of agar inhibits the reaction, so you must get
your samples from a broth.
O Samples for this reaction cannot be taken from cultures
older than 72 hours.
You need many cells, so samples must come from a solid
medium, such as a plate or slant.
You need liquid for the reaction, so you must obtain samples
from a broth or use water to dilute them.
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