What causes a reaccurring mrsa staph infection? how can you prevent it?

Not known for sure: Some people get recurrent MRSA infections. Certain people carry MRSA on their skin , nails, and/or in their noses. (colonized), considered to be MRSA "carriers" and may be more likely to get infections. There is not enough data to recommend specific treatments that get rid of colonized mrsa. Some prescribe topical, intranasal, or systemic antimicrobial agents to patients with recurrent mrsa.

Colonization: Many people who have MRSA infections are colonized with this bacteria in the nares and in areas of the skin especially in the axillae, groins and perianal areas. Colonization can be transient or prolonged. In many cases colonization can be eradicated by topical treatment ie. Mupirocin ointment and hibiclens soap sometimes combined with oral antibiotics such as Minocycline or septra (sulfamethoxazole and trimethoprim).