When would you consider transitioning to oral antibiotics in a patient with a bacterial brain abscess that has been drained?

All recommendations for the treatment of a bacterial brain abscess are the result of expert opinion and retrospective reports. There are no controlled trials. Given that caveat, the suggested duration of treatment of a bacterial brain abscess is 6 – 8 weeks. In some circumstances, treatment can be s...

It really depends on source control, the presence of a foreign body, the organism, and the antibiotic pharmacokinetics.

Assuming it is a highly susceptible organism with an oral agent with good penetration, I would de-escalate as soon as we have source control with very little residual collection.