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The Infectious Diseases Society of America treatment guidelines for uncomplicated urinary tract infections (UTIs) in women position trimethoprim-sulfamethoxazole (TMP-SMX) as the first-line treatment but caution against its empirical use if local Escherichia coli resistance rates are ≥20%. Recently, this threshold has been reached in some areas. Additionally, increased use of quinolones has led to escalating resistance to these agents. A new study from Duke University sheds light on E. coli resistance rates in young women.
Records of 167 college women presenting to a student health clinic between 2005 and 2007 with symptoms of UTI and cultures positive for E. coli were retrospectively reviewed. Antibiotic susceptibilities of the women’s isol…