Bacteria culture: mannitol fermentation r Biochemical reactions for example, staphylococcus aureus is capable of using sugar mannitol(甘露醇) as a food source and will produce acidic byproducts of Staphylococcus aureus, Staphylococcus epidermidis, fermentation that wi‖l Streptococcus pneumoniae and Streptococcus pyogenes on mannitol salt agar plates(containing lower the ph of the 7.5% NaCl, mannitol and phenol red) mediaBacteria culture: mannitol fermentation Biochemical reactions: for example, Staphylococcus aureus is capable of using sugar mannitol (甘露醇) as a food source and will produce acidic byproducts of fermentation that will lower the pH of the media. Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus pneumoniae and Streptococcus pyogenes on mannitol salt agar plates (containing 7.5% NaCl, mannitol and phenol red)