Plate Count Agar

Plate count agar (PCA) is a microbiological growth medium commonly used to assess or to monitor "total" or viable bacterial growth of a sample. PCA is not a selective medium.

The composition of plate count agar may vary, but typically it contains (w/v):

0.5% peptone
0.25% yeast extract
0.1% glucose
1.5% agar
pH adjusted to neutral at 25 C.

Plate count broth does not contain agar.

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