To the Editor: The emergence of antibiotic resistance duringtreatment for pneumococcal infection is exceedingly rare.1 Toour knowledge, there is no previous report of a geneticallycharacterized, antibiotic-resistant pneumococcal mutant emergingduring therapy and serving as the cause of treatment failure.
A previously healthy 28-year-old man presented with a five-dayhistory of cough and dyspnea. He had hypotension, hypothermia,and rales in the right upper lung. His white-cell count was14,000 per cubic millimeter (28 percent bands). Chest roentgenographyshowed infiltrates in the right middle and upper lobe. The sputumcontained abundant gram-positive diplococci, and culture yieldedStreptococcus pneumoniae;. . . [Full Text of this Article]
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