Full text: Available Index: LILACS (Americas) Main subject: Pneumonia, Ventilator-Associated / Intensive Care Units Type of study: Diagnostic study / Etiology study / Prevalence study / Prognostic study Limits: Humans Language: Portuguese Journal: J. bras. pneumol Journal subject: Pulmonary Disease (Specialty) Year: 2006 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade de São Paulo/BR