Why is MRSA difficult to treat

MRSA infections are more difficult to treat than ordinary staph infections. This is because the strains of staph known as MRSA do not respond well to many common antibiotics used to kill bacteria. ... Given enough time, bacteria can change so that these antibiotics no longer work well.

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Quindlen uses the context of American diversity to help readers rethink the concept of American identity and understand that she supports the idea of unity among Americans of all cultures.

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