A Study To Determine The Efficacy And Safety Of Tigecycline Compared With Imipenem/Cliastatin to Treat Complicated Intra-Abdominal Infection

Inclusion Criteria: * Hospitalized male or female subjects, at least 18 year of age. * Complicated intra-abdominal infection is present at most under two weeks duration. * Minimal clinical criteria at the time of intra-abdominal infection diagnosis or highly suspected intra-abdominal infection. Exclusion Criteria: * Anticipated length of antibiotic therapy less than 5 days or the likelihood that the subject will not complete the course of treatment. * Intra-abdominal infection known to be caused by 1 or more bacterial pathogens not susceptible to both of the study drugs. * Had accepted non-study antibiotics more than 24 hr within 72 hrs before enrollment except for subjects declared prior failures.