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You are here:Home » Culture Media » Media-Microbiological » Deoxyribonuclease (DNase) Test Agar w/Toludine Blue (Powder)

Deoxyribonuclease (DNase) Test Agar w/Toludine Blue (Powder)


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Assists in differentiation of microorganisms, especially Staphylococcus aureus and Serratia marcesens.
Catalog #D4020-10
DescriptionDNase Test Agar with Toluidine Blue is a complete medium since toluidine blue is incorporated in the formulation. A positive reaction is indicated by a rose-pink zone surrounding the colony in a dark blue background. In general, Gram positive microorganisms are inhibited. This medium is particularly useful for determining DNase activity of the Enterobacteriaceae.
StorageStore the sealed bottle containing the dehydrated medium at 2-8°C. Once opened and recapped, place the container in a low humidity environment at the same storage temperature. Protect it from moisture and light. The dehydrated medium should be discarded if it is not free flowing or if the color has changed from the original light beige color.
Light beige, homogeneous, free flowing powder.
Light amber, clear to slightly turbid.
pH (25°C)
Microbiological Analysis
Klebsiella pneumoniae ATCC 13883-
Serratia marcescens ATCC 8100+
Staphylococcus aureus ATCC 25923Inhibited
Important NoteThis product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.

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