Nosocomial Pneumonia With Suspected Or Proven Methicillin-Resistant Staphylococcus Aureus (MRSA)

Inclusion Criteria: * Hospitalized male and female subjects with clinically documented nosocomial pneumonia proven to be due to methicillin-resistant staphylococcus aureus. * Chest X-ray at baseline/screen or within 48 hours of treatment consistent with the diagnosis of pneumonia. * Suitable sputum specimen defined as having less than 10 squamous epithelial cells and greater or equal 25 leukocytes or have a culture taken by an invasive technique within 24 hours of study entry. Exclusion Criteria: * Subjects who were treated with a previous antibiotic with MRSA activity (other than linezolid or vancomycin) for more than 48 hours, unless documented to be a treatment failure (72 hours of treatment and not responding). * Subjects with severe neutropenia (\<500 cells/mm3) * Subjects with hypersensitivity to oxazolidinones or vancomycin.