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Penicillin And Pimaricin Agar (PPA)
Penicillin and Pimaricin Agar (PPA) is a selective medium for the enumeration of pigmented and non-pigmented psychrotophic Pseudomonas in milk, milk products and in dairy environment samples.
The typical composition responds to that defined in the standard XP ISO/TS 11059.
Available in 20 Petri plates Ø 90 mm.
In compliance with regulatory requirements, a USDA permit (VS 16-3) is mandatory for shipments from Canada to the USA due to the inclusion of peptone, an animal byproduct.
Pancreatic digest of gelatin and Tryptone are the nutrient substrates required for the rapid multiplication of Pseudomonas.
Magnesium chloride and potassium sulfate maintain the osmotic balance of the medium and stimulate the production of pyocyanin (a blue, non-fluorescent pigment soluble in water and in chloroform) of Pseudomonas.
The penicillin G and pimaricin concentrations inhibit most contaminating bacteria contaminants.
