Slow viruses and chronic disease of the central nervous system

Area of Science:

• Virology
• Neurology
• Infectious Diseases

Background:

• Slow infections, known since the 1930s, are increasingly studied.
• These infections are defined by exceptionally long incubation periods.
• They encompass diverse etiological agents and clinical presentations.

Purpose of the Study:

• To categorize and describe the different types of slow infections.
• To highlight the association between slow infections and neurological diseases.
• To explore potential mechanisms underlying these prolonged disease processes.

Main Methods:

• Classification of slow infections into three groups: A, B, and C.
• Review of viral agents and unconventional agents (e.g., prions).
• Discussion of clinical manifestations, particularly neurological syndromes.

Main Results:

• Group A: Associated with Type C RNA viruses.
• Group B: Includes unconventional agents like scrapie and kuru.
• Group C: Involves viruses like measles exhibiting unusual behavior.

Conclusions:

• Slow infections represent a distinct category of diseases with prolonged incubation.
• Neurological manifestations are a common and significant outcome.
• Further research is needed to understand their pathogenic mechanisms.