The way
SasX functions may providereference for doctors and
researchers to understand how the spread of colonization
and virulence elements through HGT drives an MRSA
epidemic. Teichoic acids, a kind of surface polymer of
Staphylococcus aureus, helped make MRSA able to
colonize the human nose (54). Moreover, MRSA has
some mechanisms resistant to antibacterial peptides
which cause the subsequent innate immune reaction (61).