Liver Abscess

Usual Organisms

Escherichia coli, Klebsiella spp., Streptococcus anginosus group, Enterococcus spp., other viridans Streptococci, Bacteroides spp.


Consult interventional radiology or general surgery for drainage. Request aerobic and anaerobic cultures, as well as histopathology

Obtain blood cultures

If patient is from or has travelled to a region with high endemicity, send aspirate for parasite examination and test Entamoeba serology. Infectious Disease Consultation recommended.

Duration of Therapy

Depends on adequacy and timing of drainage

Empiric Therapy Pending Further Workup for Bacterial Liver Abscess


Metronidazole oral absorption ~ 100%


Reassess Therapy on Day 3