Problem: A 62-year-old man with a history of smoking and heavy alcohol use develops fever, cough, diarrhea, and confusion after staying in a hotel with central air-conditioning. Labs show hyponatremia (Na+ 124 mEq/L). Sputum Gram stain shows many neutrophils but no bacteria. Which organism is the most likely cause? Need Assignment Help? a. Mycoplasma pneumoniae b. Streptococcus pneumoniae c. Haemophilus influenzae d. Legionella pneumophila