Approach to Neurologic Infections.

Area of Science:

• Neurology
• Infectious Diseases
• Diagnostic Medicine

Background:

• Increased use of immunosuppressive therapies has led to a rise in opportunistic neurologic infections.
• Autoimmune encephalitis broadens the differential diagnosis beyond infectious causes.
• Metagenomic next-generation sequencing aids in diagnosing rare neuroinfectious diseases.

Purpose of the Study:

• To provide an overview of the clinical diagnosis of neurologic infections.
• To focus on symptoms, signs, imaging, and laboratory findings.
• To cover major categories of neuroinfectious diseases.

Main Methods:

• Review of clinical approaches to neuroinfectious disease diagnosis.
• Analysis of symptoms, signs, imaging, and laboratory findings.
• Consideration of diagnostic challenges in immunocompromised patients and older adults.

Main Results:

• Neurologic infections can affect any part of the nervous system and present variably.
• Immunocompromised patients and older adults may exhibit atypical presentations.
• Accurate diagnosis relies on thorough evaluation, including neuroimaging and cerebrospinal fluid (CSF) analysis.
• Awareness of microbiological test limitations is crucial to avoid diagnostic errors.

Conclusions:

• A systematic clinical evaluation is essential for diagnosing neuroinfectious diseases.
• Emerging technologies enhance the diagnostic precision for rare and unexpected causes.
• Understanding atypical presentations in specific patient populations is critical.