Eastern equine encephalitis virus: Pathogenesis, immune response, and clinical manifestations

Area of Science:

• Virology
• Immunology
• Epidemiology

Background:

• Eastern equine encephalitis virus (EEEV), an Alphavirus, is transmitted by Culiseta melanura mosquitoes, primarily cycling between avian hosts.
• Human and equine infections are rare but exhibit high mortality and severe neurological sequelae.
• Climate change is implicated in the expanding geographical range of EEEV.

Purpose of the Study:

• To comprehensively analyze EEEV, covering transmission, pathogenesis, host immune response, and long-term sequelae in survivors.
• To elucidate EEEV's immune evasion mechanisms contributing to severe clinical outcomes.
• To identify knowledge gaps and emphasize the need for novel interventions.

Main Methods:

• Literature review and synthesis of existing research on EEEV.
• Analysis of transmission dynamics and epidemiological data.
• Examination of pathogenesis and host immune responses.

Main Results:

• EEEV causes severe neurological disease, including encephalitis, fever, convulsions, and coma.
• Survivors frequently experience chronic cognitive, motor, and psychosocial deficits.
• EEEV employs sophisticated immune evasion strategies, complicating disease management.

Conclusions:

• EEEV presents a significant and expanding public health risk, exacerbated by climate change.
• Further research into molecular mechanisms of immune evasion and long-term neurological impacts is crucial.
• Development of targeted vaccines and therapeutics is urgently needed to combat EEEV.