Staphylococcus aureus differs from Staphylococcus epidermidis by
Tube coagulase test: detects free coagulase. Coagulase is an enzyme rather brings about clotting of human or rabbit plasma. It acts as a coagulase reacting factor present in plasma, binding to prothrombin and conveing fibrinogen to fibrin. Staphylococcus aureus is coagulase positive but Staphylococcus epidermidis is coagulase negative. Staphylococcus aureus form golden yellow pigment on nutrient agar. Staphylococcus epidermidis cause endocarditis in drug addicts. Staphylococcus saprophyticus is the common cause of urinary tract infection, paicularly in sexually active young women. Reference: Textbook of Microbiology; Anathanarayan and panicker's; 10th edition; Page no: 207, 208
Is coagulase positive
Forms white colonies
A common cause of UTI
Causes endocarditis in drug addicts
Bacteriology