[Basic aspects of Staphylococcus aureus and MRSA--typing and extracellular toxins and proteins].

Many kinds of staphylococcal typing systems have been developed and tested for epidemiology of Staphylococcus aureus. Coagulase typing and phage typing are more useful and important for this epidemiology. The methods of coagulase typing and phage typing were discussed in this paper. A large number of toxins and proteins of Staphylococcus aureus have been released in the field of infectious environment. Some of these toxins and proteins, working as causative agents of staphylococcal infection, are of interest and discussed here. MRSA shows the same mechanisms of infection as methicillin sensitive Staphylococcus aureus.