Impetigo comes from a bacterium known as staphylococcus aureus. This includes streptococcus species, and staphylococcus aureus. Staphylococcus aureus bacteria is the most common cause of boils. The most common bacterial skin infections are usually with Staphylococcus and Streptococcus. This enzyme is the extracellular nuclease of Staphylococcus aureus. However, it is ineffective against methicillin-resistant Staphylococcus aureus (MRSA). The bacteria most commonly involved are streptococci and "Staphylococcus aureus". Infections resulting in bacteremia from "Staphylococcus aureus" require removal of the catheter and antibiotics. Commonly involved aerobic pathogens include "Streptococcus, Staphylococcus" and "Haemophilus". Infection is usually caused by "Staphylococcus aureus". The cause of a stye is usually a bacterial infection by "Staphylococcus aureus". The wound developed a "Staphylococcus aureus" infection. Microorganisms like "Staphylococcus epidermidis" colonize the skin surface. It is not active against methicillin-resistant "Staphylococcus aureus". "Bordetella pertussis", "Staphylococcus" and "Streptococcus" bacteria.