Haemophilus influenzae
General Susceptibility

General Susceptibility

  • 2nd & 3rd generation cephalosporins
  • Amoxicillin/Clavulanate
  • Fluoroquinolones
  • Clarithromycin
  • Azithromycin
  • Doxycycline

For invasive infections, prefer ceftriaxone as empiric therapy until susceptibilities provided - then use ampicillin.

Variable susceptibility to:

  • Amoxicillin/Ampicillin (via beta-lactamase)
  • TMP/SMX

Resistant to:

  • 1st generation cephalosporins