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 sharply declined after Hib conjugate vaccine widely used, especially in children <5yrs old who were the main victims.

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

  • Others

Additional Information

Generally Standard Precautions

Droplet precautions until 24 hours after effective therapy if presentation is meningitis, epiglottitis, invasive bacteremia, septic arthritis, osteomyelitis, pericarditis, cellulitis, or pneumonia in an infant or child