Fig. 3From: Usefulness of sputum gram stain for etiologic diagnosis in community-acquired pneumonia: a systematic review and meta-analysisSummary area under the receiver operator characteristic curves of sputum Gram stain in community acquired pneumonia. a. Streptococcus pneumoniae, b. Haemophilus influenzae, c. Staphylococcus aureus, d. Gram-negative bacilliBack to article page