Most likely pneumonia bug in old man with headache, confusion, diarrhea, and abdominal pain? Treatment?
a) Streptococcus pneumoniae; Azithromycin + Ceftriaxone or cefotaxime
b) Haemophilus influenzae; Ciprofloxacin + Ampicillin + Gentamicin
c) Legionella pneumophila; Levofloxacin or azithromycin
d) Mycoplasma pneumoniae; Doxycycline + Ceftriaxone or cefotaxime