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Staphylococcus aureus
Mannitol
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The page below is a sample from the LabCE course
Case Studies in Clinical Microbiology
. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.
Learn more about Case Studies in Clinical Microbiology (online CE course)
Staphylococcus 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 image, 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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