The prevalence of MRSA in perianal abscesses has not been described previously and is higher in our group of patients than would be expected. MRSA-positive patients cannot be identified by risk factors alone. Antibiotic resistance spectra of MRSA vary from that of enteric bacteria typically seen in perianal abscesses. Therefore, it may be beneficial to culture all perianal abscesses with extensive induration and erythema or minimal purulence.
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