Medicine Gram staining of the sputum of the patients with pneumonia is diagnostic with all these pathogens, EXCEPT: A S. pneumoniae B S. aureus C Gram-negative bacteria D Coxiella burnetii 💡 Explanation Gram staining of the sputum of the patients with pneumonia is diagnostic with all these pathogens, EXCEPT: ✓ Correct Answer: D. Coxiella burnetii