<unk>  is a gram-negative, aerobic, oxidase-positive diplococcus which may both colonise and cause respiratory tract-associated infection in humans.
Moraxella catarrhalis
Haemophilus influenzae
Streptococcus pneumoniae
Chlamydophila pneumoniae
Mycoplasma pneumonia
Rhodococcus equi
Bacillus anthracis
Rhodococcus