Background Recommendations for diagnostic testing in hospitalised patients with community-acquired pneumonia remain controversial. The aim of the present study was to evaluate the impact of a therapeutic strategy based on the microbiological results provided by urinary antigen tests for Streptococcus pneumoniae and Legionella pneumophila. Methods For a 2-year period, hospitalised patients with community-acquired pneumonia were randomly assigned to receive either empirical treatment, according to international guidelines, or targeted treatment, on the basis of the results from antigen tests. Outcome parameters, monetary costs and antibiotic exposure levels were compared.

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Pleural fluid IL-8 is an accurate marker for the identification of non-purulent CPPE.