Urinary Tract Infection

- Non-pregnant, non-lactating female outpatients between the ages of 18 - 44 years (inclusive)
- Patients with at least two of the following clinical signs and symptoms of an uUTI:
 -- Dysuria
 -- Frequency
 -- Urgency
 -- Suprapubic pain
- Patients with onset of symptoms < 72 hours prior to study entry
- Patients with one positive pre-treatment clean-catch midstream urine culture at enrollment in the study, defined as > 10000 CFU/mL (study drug treatment is permitted prior to the availability of urine culture results)
- Positive leukocyte esterase (LE) (1+ or greater) utilizing a urine dipstick method of analysis
- Patients willing to give written informed consent
- Cultures must be performed on pre-treatment clean-catch midstream urine (MSU) specimens

- Males
- Women who are pregnant, nursing, or not using two medically accepted, effective methods of birth control
- Patients with known or suspected hypersensitivity to quinolones
- Patients unable to take oral medication for any reason
- Patients with an asymptomatic bacteriuria
- Patients with complicated UTI, defined as: a clinical syndrome characterized by the development of systemic and local signs and symptoms of fever (> 38.3°C/101°F orally), chills, malaise, flank pain, back pain, or costovertebral angle (CVA) pain or tenderness
- Symptoms as outlined in the inclusion criteria occurring in the presence of a functional or anatomical abnormality of the urinary tract or in the presence of urinary catheterization
- Patients with symptoms of a UTI within the 4 weeks prior to the present episode
- Patients with the onset of symptoms >72 hours prior to study entry
- Patients with three or more episodes of any UTI in the past 12 months
- Patients with evidence of factors predisposing to the development of UTIs, including calculi, stricture, primary renal disease (e.g. polycystic renal disease), or neurogenic bladder
- Patients who received systemic antimicrobial therapy within 48 hours prior to entry
- Patients with a neutrophil count < 1000/mm3, CD4 < 200/mm3 or other conditions associated with significant depression in host defense; HIV testing is not mandatory
- Patients requiring concomitant systemic antibacterial therapy with agents not specified in this protocol
- Patients with a previous history of tendinopathy associated with fluoroquinolones
- Patients diagnosed with a rapidly fatal underlying disease (death expected within six months)
- Patients requiring concomitant use of theophylline
- Patients previously enrolled in this clinical study
- Patients taking an investigational drug in the last 30 days