The purpose of this study is to compare the clinical cure rate of ceftobiprole medocaril versus a comparator in the treatment of patients with complicated skin and skin structure infections. The study will also characterize the safety and tolerability of treatment with ceftobiprole medocaril in patients with complicated skin and skin structure infections.

Ceftobiprole medocaril is a cephalosporin antibiotic with anti-MRSA (Methicillin-Resistant Staphylococcus Aureus) activity. Ceftobiprole medocaril is not yet approved for the treatment of complicated skin and skin structure infections. This is a randomized, double-blind, multicenter study of ceftobiprole medocaril plus placebo versus a comparator to assess the effectiveness and safety of ceftobiprole medocaril in patients with complicated skin and skin structure infections. The patients will be randomized to ceftobiprole medocaril plus placebo or a comparator. The patients can be treated as in-patient, out-patient, or through a home agency, at the discretion of the investigator. The primary endpoint is the clinical cure rate of ceftobiprole medocaril at the test-of-cure visit. The patients will receive either ceftobiprole medocaril plus placebo or a comparator for 7 to 14 days (unless extended at discretion of medical monitor).

Inclusion Criteria:

• Diagnosis of an infection consistent with complicated skin and skin structure infections.

Exclusion Criteria:

• Known or suspected hypersensitivity to any study medication or other related anti-infective medication
• Any known or suspected condition or concurrent treatment contraindicated by the prescribing information
• Previous enrollment in this study
• Treatment with any investigational drug within 30 days before enrollment