The local jail is frequently sending us swabs from boils that are positive for MRSA. They say that the patients are treated topically. How important is it to report MICs on these wounds? A majority of the time, they are already treated by the time we call them with the "critical result" of MRSA.
Topical infections that are located in a fairly small area need only debridement and/or expulsion of pus. The prisons have opted to treat locally rather then orally. We do not know at this point what the antimicrobial agent(s) is or are in the ointment being used. MIC information in this setting is not necessary and qualitative susceptibility reports are more than enough for the prisons. It may be that even the latter are unnecessary in as much as ointments contain very high concentrations of the agents and may not correlate to outcomes. It is best is to communicate with the clinicians following the patients and see what their approach is...you may be able to drop susceptibility testing altogether except to let them know it is an MRSA.
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