Gram + organisms *Colony color refers to growth on nutrient agar at room temperature. White, cream, yellow, and 'yellowish' are very difficult to distinguish from one another and should not be used to ID bacteria. However, gold and rose are very distinctive and therefore can and should be used to confirm identification! REVISED FEB. 2018 Organism Bacillus subtilis + Bacillus cereus Staphylococcus aureus Gram Shape Staphylococcus epidermidis + Bac Cream Bac + Coc Colony color + Coc Cream Yellow- ish Cream/ white Mannitol Maltose Acid Acid Acid Fermentation Galactose Acid Acid Lactose Glucose Acid Acid Acid Acid Acid Acid Gelat- Cata- inase lase + + + +/- Amy- lase + ' Urease + Methyl red + + + Nitrate reduc- tase + +

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Wound infections

A wound is damaged or breaks in the surface of the skin. The wound is divided into two types, they are acute wound that includes minor cuts, laceration, bites, etc, and chronic wounds that can become slow to heal including ulcers on the legs and feet. Redness, pain, and swelling are signs of a wound.