An MSA plate with Micrococcus sp. (1), Staphylococcus epidermidis (2) and S. aureus colonies (3). Mannitol salt agar or MSA is a commonly used selective and differential growth medium in microbiology.

Jan 5, 2022 · Mannitol Salt Agar (MSA) is used as a selective and differential medium for the isolation and identification of Staphylococcus aureus from clinical and non-clinical specimens.

Mannitol salt agar (MSA) is a selective, differential, and indicator medium used to isolate and identify Staphylococcus aureus from the clinical specimen. As its name suggests, mannitol salt agar (MSA) contains 1% mannitol (sugar), 7.5% salt, and agar as a solidifying agent.

In our study, a total of 14 isolates of Staphylococcus haemolyticus and 13 isolates of S. xylosus utilized mannitol, producing yellow colonies on MSA, with a positive predictive value of 28.5% and 26.5%, respectively.

Use of mannitol salts agar is useful for differentiation of species of Staphylococcus and Micrococcus. Mannitol fermentation by pathogenic staphylococci, such as Staphylococcus aureus, is indicated by the media changing to yellow, whereas Staphylococcus epidermidis, a non-pathogenic species of staphylococci, does not produce a yellow color.

Mar 7, 2022 · A mannitol salt agar test is used to isolate and identify the presence of Staphylococcus aureus in a clinical specimen, which makes it both a selective, differential, and indicator medium.

Mannitol Salt Agar (MSA) can be used to presumptively isolate and identify Staphylococci from human samples. Refer to the compositions of MSA and MacConkey agar below.

Bile Esculin Agar is a medium used to isolate and identify enterococci. This medium contains bile salts, which makes it selective for the bile tolerant enterococci, and esculin, which is an organic compound that some of the enterococci are able to chemically break down to …

Aug 13, 2010 · The sensitivity and specificity of the tube coagulase test (human plasma) was markedly improved when Mannitol salt agar and DNase were introduced as a tri-combination test for routine identification of Staphylococcus aureus (100% specificity and 75% sensitivity).

Mannitol salt agar (MSA) is both a selective and differential medium used in the isolation of staphylococci. It contains 7.5% sodium chloride and thus selects for those bacteria which can tolerate high salt concentrations.