Timsit, J F Effect of previous antimicrobial therapy on the accuracy of the main procedures used to diagnose nosocomial pneumonia in patients who are using ventilation. [electronic resource] - Chest Oct 1995 - 1036-40 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0012-3692 Standard No.: 10.1378/chest.108.4.1036 doi Subjects--Topical Terms: AgedAnti-Bacterial Agents--therapeutic useBacteria--drug effectsBronchoalveolar Lavage Fluid--cytologyBronchoscopyCross Infection--diagnosisDrug Resistance, MicrobialDrug Therapy, Combination--therapeutic useFiber Optic TechnologyHumansMiddle AgedPneumonia, Bacterial--diagnosisProspective StudiesRespiration, ArtificialSensitivity and Specificity