
One by one, drug-resistant microbes have weakened or destroyed the efficacy of established antimicrobials. The appearance of a strain of urinary tract infection-associated Escherichia coli that is resistant to ciprofloxacin (Cipro, Proquin) is not necessarily a surprise, but it is a significant concern, according to Anthony J. Schaeffer, MD, chairman of the department of urology, Northwestern School of Medicine, Chicago.