Haemophilus influenzae

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

Variable susceptibility to:

  • Amoxicillin/ampicillin (via beta-lactamase),

  • TMP-SMX

Resistant to first generation cephalosporins.

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