Haemophilus influenzae
General Susceptibility

General Susceptibility

  • Second & third generation cephalosporins
  • Amoxicillin-clavulanate
  • Fluoroquinolones
  • Clarithromycin/azithromycin
  • Doxycycline

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

Variable susceptibility to:

  • Amoxicillin/ampicillin (via beta-lactamase),
  • TMP-SMX

Resistant to first generation cephalosporins.