A 58-year-old patient in the ICU develops fever, cough, and breathlessness 5 days after being on mechanical ventilation. Chest X-ray shows bilateral infiltrates. MRSA is isolated from the tracheal aspirate culture with a vancomycin MIC of 1.5 $\mu$g/mL, and the platelet count is 40,000/cmm. What is the most appropriate antibiotic choice for this patient?