<unk>  (formerly called Pfeiffer's bacillus or Bacillus<unk>  is a Gram-negative, coccobacillary, facultatively anaerobic capnophilic pathogenic bacterium of the family Pasteurellaceae. H.<unk>  was first described in 1892 by Richard Pfeiffer during an<unk> pandemic. He incorrectly described<unk>  as the causative microbe, which retains "influenza" in its name. The bacterium was argued by some to be the cause of<unk> as bacterial<unk>  H.<unk>  is responsible for a wide range of localized and invasive infections, but<unk> is caused by viruses. This species was the first free-living organism to have its entire genome sequenced.
Haemophilus influenzae
Bordetella pertussis
Streptococcus bovis
Neisseria meningitidis
Bacillus anthracis
Rhodococcus equi
Bordetella bronchiseptica
Streptococcus pyogenes