We evaluated the Roche LightCycler Staphylococcus M(GRADE) kits to differentiate between Staphylococcus aureus and coagulase-negative staphylococci in blood cultures growing clusters of gram-positive cocci. Testing 100 bottles (36 containing S. aureus), the assay was 100% sensitive and 98.44% specific for S. aureus and 100% sensitive and specific for coagulase-negative staphylococci.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1317217PMC
http://dx.doi.org/10.1128/JCM.43.12.6144-6146.2005DOI Listing

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