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Updated: Jul 16, 2026
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Induction and Clinical Scoring of Chronic-Relapsing Experimental Autoimmune Encephalomyelitis
Published on: July 4, 2007
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[Western equine encephalitis: Brainstem involvement and clinical manifestations]
María Luz Campassi1, Mario Cuitiño1, Fermín Dorregaray1
1Clínica La Pequeña Familia, Junín, Buenos Aires, Argentina.
Medicina
|December 12, 2024
Summary
Western equine encephalitis, a mosquito-borne viral illness, can cause severe neurological issues including respiratory failure. This case highlights the importance of recognizing its rare but serious complications.
Area of Science:
- Neuroscience
- Infectious Diseases
- Public Health
Background:
- Western equine encephalitis (WEE) is a zoonotic arboviral disease transmitted by mosquitoes.
- While most human cases are asymptomatic, severe presentations can include encephalitis and meningitis.
- Neurological sequelae, such as cognitive deficits and respiratory center injury, affect approximately 30% of patients.
Observation:
- A 66-year-old male presented with fever and malaise, rapidly progressing to encephalopathy.
- Cerebrospinal fluid analysis revealed a predominantly mononuclear inflammatory profile.
- Brain MRI demonstrated hyperintensity in the brainstem on FLAIR and T2 sequences.
Findings:
- The patient developed severe respiratory acidosis requiring mechanical ventilation.
- Neurological improvement was noted, but persistent alveolar hypoventilation complicated ventilator weaning.
- Magnetic resonance imaging findings correlated with brainstem involvement.
Implications:
- This case underscores the potential for severe neurological and respiratory complications from Western equine encephalitis.
- Early recognition and supportive care, including mechanical ventilation, are critical for managing severe cases.
- The findings emphasize the utility of MRI in diagnosing and evaluating brainstem involvement in WEE.
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