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30787 Millipore

Deoxyribonuclease Test Agar

for microbiology



Related Categories A - M, All Food Control Media (alphabetical), All Solid Media/Agars, Biochemical Identification Media by Test, Biochemical Identification Media, A to Z,
grade   for microbiology
shelf life   limited shelf life, expiry date on the label
composition   agar, 15 g/L
  deoxyribonucleic acid, 2 g/L
  sodium chloride, 5 g/L
  tryptose, 20 g/L
final pH   7.3±0.2 (37 °C)
Featured Industry   Clinical Testing
Food and Beverages
suitability   nonselective and differential for Serratia
  nonselective and differential for Staphylococcus
  nonselective and differential for Streptococcus


General description

Deoxyribonuclease Test Agar is recommended for the detection of deoxyribonuclease activity of bacteria and fungi, and especially for identification of pathogenic Staphylococci.
Bacteria are streaked on to the surface of the agar medium and incubated. The growth on the surface of the agar is then flooded with 1N hydrochloric acid. Polymerised DNA precipitates in the presence of 1N HCl and makes the medium opaque. If the organisms produce DNase enzymes, in sufficient quantity to hydrolyse the DNA, then clear zones are seen around the colonies.

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis

Protocols & Articles


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Peer-Reviewed Papers


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