<unk>  is a subspecies of<unk>  pneumoniae— a gram-negative, encapsulated, nonmotile,  rod-shaped bacillus (diplobacillus), member of the Enterobacteriaceae family. It is sometimes referred to as the "Frisch bacillus," named for Anton von Frisch who identified the organism in 1882. It is contracted directly by droplets or by contamination of material that is subsequently inhaled.
Klebsiella rhinoscleromatis
Rhodococcus equi
Legionella micdadei
Cardiobacterium hominis
Bartonella henselae
Mycobacterium xenopi
Mycobacterium chelonae
Mycobacterium malmoense