An update on bacterial brain abscess in immunocompetent patients

Area of Science:

• Neuroscience
• Infectious Diseases
• Microbiology

Background:

• A brain abscess is a focal infection of the brain, often originating from bacterial spread.
• In immunocompetent individuals, bacteria cause over 95% of brain abscesses via contiguous spread or hematogenous dissemination.
• Classic symptoms like headache, fever, and focal neurological deficits are present in only about 20% of patients.

Purpose of the Study:

• To review recent advancements in the diagnosis and management of brain abscesses.

Main Methods:

• A literature search was conducted using Medline and Embase databases.
• Articles published between 2012 and 2016 were included.
• Keywords used were 'brain' and 'abscess'.

Main Results:

• Magnetic resonance imaging (MRI) with contrast is the gold standard for diagnosing brain abscesses.
• Stereotactic aspiration of lesions before antimicrobial therapy is recommended for optimal microbiological documentation.
• Empirical treatment should cover common pathogens including streptococci, staphylococci, anaerobes, and Enterobacteriaceae.
• A 6-week course of a third-generation cephalosporin and metronidazole is effective for community-acquired brain abscesses in immunocompetent patients.

Conclusions:

• Advances in brain imaging, minimally invasive surgery, molecular biology, and antimicrobial agents have significantly improved brain abscess prognosis.
• Optimal management involves timely diagnosis, appropriate surgical intervention, and targeted antimicrobial therapy.
• Continued research in molecular diagnostics and novel antibacterial agents holds promise for further enhancing patient outcomes.