PLATE COUNT AGAR
TRYPTONE GLUCOSE YEAST AGAR

Code: CM0325

A medium for the enumeration of viable organisms in food, animal feed and water samples

Description
Plate Count Agar is equivalent to the medium recommended by the APHA^1, PHLS ² and ISO^3,4 for the plate count of micro-organisms in food.
The APHA method consists of the preparation of pour plates using diluted samples, and counting colonies after incubation. Incubation is for 48 hours at 32°C or at 35°C for the Standard Plate Count. For the enumeration of micro-organisms with other temperature requirements, plates may also be incubated for 7-10 days at 5-7°C: for 3-5 days at 20°C; for 2-3 days at 45°C; or for 48 hours at 55°C. See the APHA¹ publication for details.

Samples should be tested following the method described in the appropriate standard.

The quality control of Plate Count Agar includes testing in accordance with ISO 11133:2014⁵.

Storage conditions and Shelf life
Store the dehydrated medium at 10-30°C and use before the expiry date on the label.
Store the prepared plates at 2-8°C.