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Normal good hygiene is the key. In the hospital environment we have the “universal precautions” philosophy to protect against spread of bacteria, but in the home environment, not practical. If there is no reoccurring issues, I would focus on seat belts, bike helmets, etc. as more important safety issues….if a second member of the family gets MRSA, then it deserves deeper evaluation. If there is a culture to be done, besides that of a drained abscess, it would be from the nose, where MRSA can reside. If the nasal culture is positive, treatment is started to eradicate this carrier state.