By Katherine Harmon
(Click here for the original article)
The superbug MRSA (methicillin-resistant Staphylococcus aureus) has provoked fear in doctors and patients alike because it is endowed with genetic characteristics that make it impervious to many antibiotics, and it can be deadly to boot. Less well known, however, is another class of bacteria that also resist antibiotics, but for reasons that have puzzled scientists. These bugs cause stubborn infections in ears and urinary tracts and post-surgical wounds, even though, from their genetic profiles, they should be perfectly good targets for antibiotics.
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