Staph aureus Mannitol from Current Topics in Clinical Microbiology, presented by MediaLab

Post Traumatic Wound Infection: Laboratory Identification

Staph aureus Mannitol

The ability to grow in 6.5% NaCl and to produce acid from mannitol was once considered sufficient to identify S. aureus.
Although other Staphylococcus species have these characteristics, mannitol salt agar, as shown here, can still be used for epidemiologic studies in suspected cases of S. aureus outbreaks.
As shown in the photograph, the presence of colonies indicates the ability to grow on 6.5% NaCl; and, the yellow pigment of the colonies indicates acid production from mannitol.

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