MRSA=methicillin-resistant Staphylococcus aureus; MSSA=methicillin-sensitive Staphylococcus aureus; VAP=ventilator-associated pneumonia.Reproduced from Vidaur L et al. Ventilator-Associated Pneumonia: Impact of Organisms on Clinical Resolution and Medical Resources Utilization. Chest 2008;133(3):625. With permission from Elsevier.