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Pertussis-associated encephalitis/encephalopathy with marked demyelination in an unimmunized child

Ayako Hiraiwa-Sofue1, Yoshinori Ito, Harushi Mori

  • 1Department of Pediatrics, Hiraiwa Hospital, Japan.

Journal of the Neurological Sciences
|July 17, 2012
PubMed

Insights

Pertussis can cause severe encephalitis. This case highlights unique MRI findings and elevated myelin basic protein in cerebrospinal fluid, suggesting immune-mediated damage in pertussis-associated encephalitis.

Area of Science:

  • Neurology
  • Infectious Diseases
  • Immunology

Background:

  • Pertussis (whooping cough) is a contagious respiratory illness.
  • Encephalitis/encephalopathy is a rare but severe neurological complication of pertussis.
  • This case involves an unvaccinated 7-year-old boy with pertussis-induced encephalitis.

Observation:

  • The patient presented with generalized seizures 18 days after pertussis onset.
  • MRI revealed significant demyelination without cytotoxic edema.
  • Cerebrospinal fluid (CSF) showed elevated myelin basic protein (MBP) levels.

Findings:

  • This is the first report detailing precise MRI findings in pertussis-associated encephalitis.
  • CSF analysis confirmed elevated MBP, correlating with MRI observations.
  • Elevated CSF levels of Interleukin-6 and -10 suggest an inflammatory response.
  • No direct bacterial invasion of the central nervous system was detected.

Implications:

  • Findings suggest indirect immune-mediated mechanisms contribute to pertussis-associated encephalitis pathogenesis.
  • This case provides novel insights into the neuroimaging and biochemical markers of this rare complication.
  • Understanding the pathogenesis is crucial for potential therapeutic strategies.

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