Small Gram-negative coccobacillus.
Normal respiratory flora
Invasive disease sharply declined after Hib conjugate vaccine widely used, especially in children <5yrs old
Most invasive disease is now caused by non-typeable strains
Colonizer of the upper respiratory tract but can cause invasive disease including:
Droplet precautions if presentation is epiglottitis.
Asplenic patients at risk of invasive infection