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Spectra MRSA medium plated with methicillin-resistant Staphylococcus aureus. The ability of Spectra MRSA to identify methicillin-resistant S. aureus based on the color of the colony, in which colonies of methicillin-resistant S. aureus appear denim blue, is shown. For the purposes of the study, nasal swab specimens were plated directly onto Spectra MRSA and a gold standard medium (SBA or MSA), and the plates were observed for growth at 24 and 48 h.
