Encephalitis

Introduction[edit | edit source]

Encephalitis.jpg

Encephalitis is a very severe infection caused by the inflammation of the brain tissues. When encephalitis occur with meningitis, it is called meningoencephalitis. It is caused either as a direct infection or a sequela of a pre-existing condition. [1]

Causes[edit | edit source]

Encephalitis is caused by any of the following factors; [2]

  • Viral infection, e.g rabies virus, HSV, poliovirus, mealses virus, bunyavirus, reovirus, etc [3]
  • Bacterial infection, e.g mycoplasma, Lyme disease, Bartonella henselae, malaria, etc can result in encephalitis especially in immuno-compromised individuals.
  • Autoimmune disorders
  • Some types are of unknown aetiology

Clinical Presentation[edit | edit source]

An adult infected with the disease typically present with; [4]

  • Headache
  • Confusion
  • Fever
  • Drowsiness
  • Fatigue
  • Seizures or convulsions
  • Tremors
  • Stroke
  • Hallucinations
  • Memory problems

An infant may present with; [5]

  • Irritability
  • Poor appetite
  • Fever

Diagnostic Procedures[edit | edit source]

Encephalitis can be diagnosed using any of the following procedures; [1]

  • Magnetic Resonance Imaging (MRI) to detect the inflammation
  • Electroencephalography (EEG) to monitor the electrical activity of the brain
  • Lumbar puncture (spinal tap)
  • Urine analysis
  • Blood test

Medical Management[edit | edit source]

These may include; [1]

  1. Antiviral medications (for viral infection)
  2. Antibiotics (for bacterial infection)
  3. Steroids
  4. Sedatives
  5. Acetaminophen

Physiotherapy Management / Interventions[edit | edit source]

  1. Exercise therapy
  2. Gait rehabilitation
  3. Manual therapy
  4. Passive motion procedures

Differential Diagnosis[edit | edit source]

  1. Leptospirosis
  2. CNS vasculitis
  3. Meningoencephalitis
  4. Stroke
  5. Meningitis
  6. Subdural empyema
  7. Meningeal carcinomatosis

References[edit | edit source]

  1. 1.0 1.1 1.2 Kennedy PGE. Viral Encephalitis: Causes, Differential Diagnosis, and Management. Journal of Neurology, Neurosurgery & Psychiatry. 2004;75 (suppl 1): i10–i15
  2. Larner AJ. Neuropsychological Neurology: The Neurocognitive Impairments of Neurological Disorders. 2013. Cambridge University Press.
  3. Fisher DL, Defres S, Solomon T.  Measles-induced encephalitis. QJM. 2015; 108 (3): 177–182.
  4. Jmor F, Emsley HC, Fischer M. et al. The incidence of acute encephalitis syndrome in Western industrialised and tropical countries. Journal of Virology.2008; 5 (134): 134.
  5. Armangue T, Petit-Pedrol M, Dalmau J. Autoimmune Encephalitis in Children. Journal of child neurology. 2012; 27 (11): 1460–1469.