This is a Phase 4, prospective, open-label, non-comparative, multicenter study to characterize the usage of doripenem in selected hospitals in the Asia Pacific region. Doripenem belongs to the carbapenem class which is a broad-spectrum antibiotic given to treat patients with serious infections, such as pneumonia and complicated intra-abdominal infections. Physicians in the selected hospital or hospital unit will refer potential patients to the study team. Patients will include men and women 18 years of age and older, hospitalized either in the Intensive Care Unit (ICU) or ward, with a diagnosis of pneumonia, complicated intra-abdominal infections and complicated urinary tract infections. The study has 3 phases: a pretreatment phase with a 1-day screening/baseline visit, a treatment phase of 5 to 14 days, and a post-treatment phase consisting of an end-of-treatment (EOT)/early withdrawal visit to be conducted within 24 hours after the last dose of antimicrobial therapy, a test of cure (TOC) visit 7 to 14 days after EOT, a Day 28 visit, and a post-discharge visit 28 days after discharge from the hospital. Usage of Doripenem in terms of approved indications, mode of usage, duration of antibiotic therapy, and patient characteristics will be assessed. Safety will be assessed through monitoring for adverse events, serial physical examinations, and the collection of conventional laboratory data (chemistry panel, complete blood count with differential). Being a prospective study, patient data will be gathered as the patients are enrolled, starting with their present condition and following them until duration of the study. The study will not compare Doripenem with other antibiotics for the primary endpoint. One vial (500mg) of doripenem intravenously (by injection) every 8 hours for 5 to 14 days