Twenty years ago the
post antibiotic era was predicted for gram positive infections. Five
years or so later CA-MRSA began to overtake HA-MRSA.
The takeover is complete, with the result that today’s MRSA,
though resistant to most beta lactam antibiotics, is sensitive to
several older antimicrobial agents besides vancomycin, in contrast
to the older traditional MRSA (HA-MRSA). In a new development, a goodly number of MSSA infections show susceptibility to plain penicillin.
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