Gram Positive Cocci IdentificationLaboratory testing algorithm for Streptococcus spp, and Staphylococcus aureus, MRSA, S. epidermidis, S. saprophyticus, and S. lugdunensis Hover over the animation to start / stop rotationGram positive Cocci, Clusters Staphylococci Gram positive Cocci, Chains Streptococci Catalase Test Staphylococcus - - Streptococcus Catalase Positive Staphylococcus aureus Catalase Positive Methicillin-resistant S. aureus (MRSA) Catalase Positive Staphylococcus epidermidis Catalase Positive - Coagulase Negative Staphylococcus saprophyticus Catalasze Positive - Coagulase Negative Staphylococcus lugdunensis |