Staphylococcus tends to be a very nasty infection causing bacteria and are well known for forming strains that are resistant to antibiotics. MRSA (Methicilin Resistant Staphylococcus) and other such stash infection though are actually well known for having one major weakness.... Washing your hands.
Washing your hands is the single, most important thing you can do to protect not only against these types of infections, but a vast number of viral and bacterial agents.