Actinomyces causing a brain abscess.

Area of Science:

• Infectious Diseases
• Neurology
• Microbiology

Background:

• Actinomycosis is a chronic granulomatous infection caused by *Actinomyces israelii*.
• It typically presents with oral-cervicofacial, chest wall, gastrointestinal, or genital tract manifestations.
• The disease can be indolent and easily misdiagnosed as malignancy, necessitating a high index of suspicion.

Observation:

• This case report details a rare instance of actinomycosis leading to a brain abscess.
• The patient's presentation and diagnostic journey highlight the challenges in identifying this infection outside its common sites.
• Cerebral involvement underscores the potential severity and systemic impact of *Actinomyces israelii*.

Findings:

• Actinomycosis can manifest as a brain abscess, a severe central nervous system complication.
• Diagnosis requires a high index of suspicion, especially when symptoms deviate from typical presentations.
• Prompt identification and intervention are critical for favorable outcomes in complex actinomycosis cases.

Implications:

• This case expands the known spectrum of actinomycosis presentations.
• It emphasizes the importance of considering infectious etiologies, including actinomycosis, in unexplained neurological deficits.
• Neuroimaging and microbiological confirmation are vital for diagnosing and managing brain abscesses caused by *Actinomyces*.