IS<i>Sau2</i>-positive <i>S</i>. <i>aureus</i> strains and isolates evaluated in this study.

“Number of ISSau2”: the copy number of ISSau2 in the according strain or isolate. “Number of ISSau2 sequence type”: the number of ISSau2 sequence type in one S. aureus strain or isolate. “MRSA”: Methicillin-resistant Staphylococcus aureus. “HA-MRSA”: Healthcare-Associated Methicillin Resistant Staphylococcus aureus. “CA-MRSA”: Community-associated methicillin-resistant Staphylococcus aureus. “LA-MRSA”: Livestock-associated methicillin-resistant Staphylococcus aureus. “MSSA”: Methicillin Susceptible Staphylococcus aureus. ISSau2-positive S. aureus strains and isolates evaluated in this study.