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Influenza B-related meningoencephalitis in adults

Chen Han Yong1,2, Wilson Vallat1, Graham Norton1

  • 1Lyell McEwin Hospital, Elizabeth Vale, South Australia, Australia.

BMJ Case Reports
|June 23, 2018
PubMed

Insights

This case report details an elderly man with influenza B who developed meningoencephalitis, a brain inflammation. Early diagnosis via PCR and CSF analysis is crucial for supportive care in this rare neurological complication.

Area of Science:

  • Neurology
  • Infectious Diseases
  • Virology

Background:

  • Influenza B virus is a common respiratory pathogen.
  • Neurological complications of influenza, while rare, can be severe.
  • Meningoencephalitis presents a significant diagnostic and therapeutic challenge.

Observation:

  • An 85-year-old male presented with acute confusion and new-onset seizure.
  • Symptoms followed a one-week history of respiratory prodrome.
  • Cerebrospinal fluid (CSF) analysis and nasopharyngeal PCR confirmed Influenza B infection.

Findings:

  • The patient was diagnosed with influenza B-related meningoencephalitis.
  • Neurological symptoms were temporally linked to the respiratory illness.
  • No other causative agent for the meningoencephalitis was identified.

Implications:

  • This case highlights the potential for severe neurological sequelae from Influenza B.
  • Diagnostic confirmation relies on CSF profiling and PCR testing.
  • Further research is needed to clarify the role of vaccination in preventing such neurological complications.
Keywords:
infection (neurology)influenzaneurology

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