Patient description: A 45-year-old woman was referred to the emergency department with abdominal pain lasting about 4 days accompanied by nausea and 2 episodes of vomiting. The pain is localized to the epigastric region and radiates to the right upper quadrant. The pain is worsening after eating fatty food. The patient experienced similar pain twice in the past year. Her past medical history is remarkable for hypercholesterolemia and two C/sections. She has 2 children, and she is menopausal. She doesn't smoke, drink alcohol, or use illicit drugs. She is mildly febrile. Her BP is 150/85, HR 115, RR 15, T 38.2, SpO2 98% on RA. On palpation, she experiences epigastric tenderness and tenderness in the right upper quadrant without rebound. Bowel sounds are normal. Laboratory analysis is remarkable for elevated ESR and leukocytosis with a left shift. The ultrasound revealed several gallstones and biliary sludge. The largest gallstone is 0.7cm. Surgery consultation recommends elective cholecystectomy.

Clinical trial eligibility criteria: eligible ages (years): 18.0-999.0,  Infection Hospitalized men or women >/=18 years of age Expected duration of treatment with intravenous antibiotics anticipated to be >/= 5 full days but not exceeding 14 days Ability to provide documented and signed written informed consent Confirmed or suspected intra abdominal infection defined as follows For a confirmed intra abdominal infection, a surgical procedure (laparotomy or laparoscopy) must have been performed within 24 hours prior to enrollment and reveal at least one of the following Gross peritoneal inflammation with purulent exudates (i.e. peritonitis) Intra abdominal abscess Macroscopic intestinal perforation with localized or diffuse peritonitis Subjects enrolled on the basis of a suspected intra abdominal infection must have Radiological evidence [abdominal plain films, computed tomography (CT), magnetic resonance imaging (MRI) or ultrasound] of gastrointestinal perforation or intra-abdominal abscess and the following signs and symptoms  Known hypersensitivity to quinolones, and/or to carbapenems and/or to any other type of beta lactam antibiotic drugs (e.g. penicillins or cephalosporins), or any of the excipients Women who are pregnant or lactating or in whom pregnancy cannot be excluded History of tendon disease/disorder related to quinolone treatment Known congenital or documented acquired QT prolongation; uncorrected hypokalemia; clinically relevant bradycardia; clinically relevant heart failure with reduced left ventricular ejection fraction; previous history of symptomatic arrhythmias Concomitant use of any of the following drugs, reported to increase the QT interval: antiarrhythmics class IA (e.g. quinidine, hydroquinidine, disopyramide) or antiarrhythmics class III (e.g., amiodarone, sotalol, dofetilide, ibutilide), neuroleptics (e.g. phenothiazines, pimozide, sertindole, haloperidol, sultopride), tricyclic antidepressive agents, certain antimicrobials (sparfloxacin, erythromycin IV, pentamidine, antimalarials, particularly halofantrine), certain antihistaminics (terfenadine, astemizole, mizolastine), and others (cisapride, vincamine IV, bepridil, diphemanil) Known severe end stage liver disease Creatinine clearance </= 30 mL/min/1.73 m2 Systemic antibacterial therapy administered for more than 24 hours within 7 days of enrollment Need for systemic antibacterial therapy with agents other than those described in the study protocol Indwelling peritoneal catheter