Flaviviruses-Induced Neurological Sequelae

Area of Science:

• Neurovirology
• Infectious Diseases

Background:

• Flaviviruses are RNA viruses transmitted by mosquitoes or ticks.
• Neurotropic flaviviruses, including West Nile virus (WNV), Japanese encephalitis virus (JEV), tick-borne encephalitis virus (TBEV), and Zika virus (ZIKV), cause significant neurological diseases.
• Acute infections range from mild symptoms to fatal encephalitis, with 20-50% of survivors experiencing long-term cognitive impairment.

Purpose of the Study:

• To review the clinical diseases caused by major neurotropic flaviviruses in humans.
• To discuss recent findings from animal models of flavivirus infections.
• To provide insights into the mechanisms underlying flavivirus-induced neurological diseases.

Main Methods:

• Literature review of clinical cases and human studies.
• Analysis of recent research findings in animal models.
• Synthesis of current understanding of disease pathogenesis.

Main Results:

• Flavivirus infections manifest in diverse neurological syndromes during acute phases.
• Long-term cognitive deficits are a common sequela in a significant proportion of recovered patients.
• Animal models offer valuable insights into viral entry, spread, and host response in the central nervous system.

Conclusions:

• Neurotropic flaviviruses pose a substantial threat, causing both acute neurological damage and persistent cognitive dysfunction.
• Understanding the mechanisms of flavivirus neuroinvasion and pathogenesis is crucial for developing effective treatments and preventative strategies.
• Further research, particularly utilizing animal models, is essential to elucidate these complex disease processes.