<3months: Cefotaxime IV (at CNS dose) + metronidazole IV/PO
>3months: Ceftriaxone IV (at CNS dose) + metronidazole IV/PO
If no organism identified IVOST to PO co-amoxiclav and metronidazole to complete 7-10 day course.
Vancomycin IV + Gentamicin IV + Metronidazole IV/PO
May need surgical drainage; discuss with ENT. If cold abscess, then discuss with tertiary centre.
Review treatment following culture result and discuss with microbiology.