Unformatted text preview: patients with asymptomatic bacteriuria (of whom only selected subgroups should be treated) have pyuria as do some patients with noninfectious inflammatory conditions (e.g. allergic interstitial nephritis). 4. Treatment The most common causes of UTI are E. coli (85%), Staphylococcus saprophyticus (5-10%), and other enteric gram-negatives (5-10%). These organisms are nearly always susceptible to quinolones. Nowadays, about 20-30% are resistant to TMP-SMX. For reasons not entirely clear, quinolones and trimethoprim-sulfamethoxazole (TMP-SMX) are more effective than beta-lactams for UTI even if the organisms are susceptible to the beta-lactams. For cystitis, a superficial infection, 3 days of treatment usually suffices. For uncomplicated pyelonephritis (no obstruction or other anatomic problem), 2 weeks suffices....
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- Fall '10
- Anatomy, urinary tract infection, bacteriuria, asymptomatic bacteriuria, true bacteriuria, document true bacteriuria