DNAse Positive Organisms

Submitted by amh10 on 16 September, 2009 - 20:19
  • Some strains of Staphylococcus intermedius are DNase-positive.
  • Some strains of MRSA are DNase-negative.
  • The subspecies of Staphylococci schleiferi are DNase positive and produce heat stable nucleases.
  • Some coagulase-negative staphylococci such as Staphylococcus epidermis give weak reactions.
  • This test should always be used in conjunction with another test for confirmation of identification of Staphylococcal isolates.
  • Also Serratia marcesens, Moraxella spp.

AMH.

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