Fig. 2From: Usefulness of sputum gram stain for etiologic diagnosis in community-acquired pneumonia: a systematic review and meta-analysisPooled sensitivity and specificity of sputum Gram stain in community-acquired pneumonia. a. Streptococcus pneumoniae, b. Haemophilus influenzae, c. Staphylococcus aureus, d. Gram-negative bacilliBack to article page