Taxonomy
Family: Pasteurellaceae

Natural habitats
H. haemolyticus is a human commensal bacterium that colonizes the nasopharynx.

Clinical significance They are closely related to the human patogen H. influenzae but has rarely been reported to cause invasive disease. They may cause disease more as a oppertunistic pathogen

Taxonomy
Family: Flavobacteriaceae, genus: C. canimorsus, C. cynodegmi

Natural habitats
It is a commensal bacteria in the normal gingival flora of canine and feline species.
Transmission may occur through bites, licks or even close proximity with animals.

Clinical significance
A wound infection (dog bite) with these bacteria may cause serious local problems.

Moreover, there is a high probability of a running fulminant sepsis, in wich multi-organ failure (MOF) may occur.

Taxonomy
Family: Pasteurellaceae, formerly: Pasteurella ureae
Genus: Actinobacillus ureae and A. hominis

Natural habitats
A. ureae is usually a commensal in the human respiratory tract, particularly in patients with lower respiratory tract disease.

Clinical significance
They may be involved in the pathogenesis of sinusitis, bronchopneumonia, meningitis, and other infections in immunocompromised patients.

Cases are rare.