Safety and Efficacy Study to Compare IV CXA 101/Tazobactam and Metronidazole With Meropenem in Complicated Intraabdominal Infections

Inclusion Criteria

• Male or female, from 18 to 90 years of age, inclusive
• One of the following diagnoses (in which there is evidence of intraperitoneal infection) including:(a) Cholecystitis (including gangrenous cholecystitis) with rupture, perforation, or progression of the infection beyond the gallbladder wall;(b)Diverticular disease with perforation or abscess; (c) Appendiceal perforation or periappendiceal abscess; (d) Acute gastric or duodenal perforation, only if operated on >24 hours after perforation occurs; (e) Traumatic perforation of the intestine, only if operated on > 12 hours after perforation occurs; (f) Peritonitis due to perforated viscus, postoperative or spread from other focus of infection (but not spontaneous [primary] bacterial peritonitis or peritonitis associated with cirrhosis and chronic ascites).Subjects with inflammatory bowel disease or ischemic bowel disease are eligible provided there is bowel perforation; or (g) Intraabdominal abscess (including liver and spleen).
• Subject requires surgical intervention (e.g. laparotomy, laparoscopic surgery, or percutaneous draining of an abscess) within 24 hours of (before or after) the first dose of study drug
• If subject is to be enrolled preoperatively, the subject must have radiographic evidence of bowel perforation or intraabdominal abscess
• Subjects who failed prior antibacterial treatment for the current cIAI can be enrolled but must: (a) have a positive culture (from an intraabdominal site) and (b) require surgical intervention. Such subjects can be enrolled before the results of the culture are known; however, if the culture is negative, study drug administration must be discontinued.
• Willing and able to comply with all study procedures and restrictions
• Willing and able to provide written informed consent

Exclusion Criteria

• Women who are pregnant, nursing, or - if of child bearing potential - not using a medically accepted, effective method of birth control (e.g. condom, oral contraceptive, indwelling intrauterine device, or sexual abstinence)
• Diagnosis of abdominal wall abscess; small bowel obstruction or ischemic bowel disease without perforation; traumatic bowel perforation with surgery within 12 hours; perforation of gastroduodenal ulcer with surgery within 24 hours (these are considered situations of peritoneal soiling before infection has become established); another intraabdominal process in which the primary etiology is not likely to be infectious.
• Simple cholecystitis, gangrenous cholecystitis without rupture, simple appendicitis, acute suppurative cholangitis, infected, necrotizing pancreatitis, or pancreatic abscess
• cIAI managed by staged abdominal repair (STAR), open abdomen technique or any situation where infection source control is not likely to be achieved
• Known prior to randomization to have an IAI or postoperative infection caused by pathogen(s) resistant to meropenem
• Considered unlikely to survive the 4- to 5-week study period
• Any rapidly-progressing disease or immediately life-threatening illness (including acute hepatic failure, respiratory failure and septic shock)
• The need for concomitant systemic antibacterial agents (other than vancomycin or linezolid) in addition to study drug(s)
• Moderate or severe impairment of renal function (estimated CrCl 4 x ULN; (b)Total bilirubin >2 x ULN, unrelated to cholecystitis (c) Alkaline phosphatase >4 x ULN. Subjects with a value >4 x ULN and 40 mg prednisone or equivalent per day for greater than 2 weeks).
• History of hypersensitivity reactions to cephalosporins, carbapenems, penicillins, ß-lactamase inhibitors, metronidazole, or nitroimidazole derivatives. Subjects with a history of mild skin rash, not documented to be caused by previous ß-lactam use, may be enrolled.
• Any condition or circumstance that, in the opinion of the Investigator, would compromise the safety of the subject or the quality of study data
• Clinically significant abnormality in baseli