Haemophilus influenzae


Standard Precautions
Standard Precautions

General Information

Pathogen information

Small Gram-negative bacillus, encapsulated or not (non=non-typeable)


Normal respiratory flora.

Invasive disease has sharply declined since Hib conjugate vaccine widely used.

Most invasive disease is now caused by non-typable strains.

Associated syndromes

Colonizer of the upper respiratory tract

May cause invasive disease including:

  • Meningitis

  • Pneumonia/empyema

  • Bacteremia

  • Epiglottitis

  • MSK infection

Additional Information

Droplet precautions if presentation is epiglottitis.

Invasive disease is notifiable - call Public Health ASAP.