Meningoencephalitis: Difference between revisions

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'''Original Editor '''- [[User:User: Kehinde Fatola|Kehinde Fatola]] <br>  '''Top Contributors''' - {{Special:Contributors/{{FULLPAGENAME}}}}</div>
'''Original Editor '''- [[User:User: Kehinde Fatola|Kehinde Fatola]] <br>  '''Top Contributors''' - {{Special:Contributors/{{FULLPAGENAME}}}}</div>


== Introduction ==
== Clinically Relevant Anatomy ==
Meningoencephalitis is a very serious neurological condition resembling both [[meningitis]] and [[encephalitis]] - inflammation of the the meninges (covering of the CNS) and inflammation of the brain tissues respectively. <ref>Orgogozo JM, Gilman S, Dartigues JF, et al. Subacute meningoencephalitis in a subset of patients with AD after Aß42 immunization. Journal of Neurology. 2003; 61 (1): 46–54.</ref>
[[Meninges]] are 3 thin layers that cover and protect the brain and spinal cord. They are the dura matter, arachnoid matter and pia matter. These meninges provide a support system for blood vessels, nerves, lymphatics and the cerebrospinal fluid that surrounds your central nervous system<ref>Greenberg RW, Lane EL, Cinnamon J, Farmer P, Hyman RA. The cranial meninges: anatomic considerations. InSeminars in Ultrasound, CT and MRI 1994 Dec 1 (Vol. 15, No. 6, pp. 454-465). WB Saunders.</ref>. Meningoencephalitis is a neurological condition resembling both [[meningitis|meningitis,]] which is the inflammation of the [[meninges]], and [[encephalitis]], which is the inflammation of the brain tissue<ref>Sapra H, Singhal V. Managing meningoencephalitis in indian icu. Indian Journal of Critical Care Medicine: Peer-reviewed, Official Publication of Indian Society of Critical Care Medicine. 2019 Jun;23(Suppl 2):S124.</ref>.


Meningoencephalitis is usually a result of direct embolization to meningeal vessels, with subsequent parenchymal or cerebrospinal fluid (CSF) invasion of the infecting organism.
== Pathological Process ==
Meningoencephalitis is the result of direct embolization to meningeal vessels, with subsequent parenchymal or cerebrospinal fluid (CSF) invasion of the infecting organism<ref>Aminoff M. Josephson SA. Aminoff's Neurology and General Medicine.6th Edition. Elsevier Science & Technology. 2021.</ref>.


== Causes ==
== Causes ==

Revision as of 15:05, 24 April 2023

Original Editor - Kehinde Fatola
Top Contributors - Kehinde Fatola, Reem Ramadan, Kim Jackson and Lucinda hampton

Clinically Relevant Anatomy[edit | edit source]

Meninges are 3 thin layers that cover and protect the brain and spinal cord. They are the dura matter, arachnoid matter and pia matter. These meninges provide a support system for blood vessels, nerves, lymphatics and the cerebrospinal fluid that surrounds your central nervous system[1]. Meningoencephalitis is a neurological condition resembling both meningitis, which is the inflammation of the meninges, and encephalitis, which is the inflammation of the brain tissue[2].

Pathological Process[edit | edit source]

Meningoencephalitis is the result of direct embolization to meningeal vessels, with subsequent parenchymal or cerebrospinal fluid (CSF) invasion of the infecting organism[3].

Causes[edit | edit source]

Meningoencephalitis is caused by various bacterial, viral and protozoan infection. Some of them are; [4]

  1. Bacteria

2. Viruses [5]

  • Tick-borne meningoencephalitis
  • West Nile virus
  • Measles
  • [Epstein-Barr Virus|Epstein-Barr]] virus
  • Varicella-zoster virus
  • Enterovirus
  • Herpes simplex virus type 1
  • Herpes simplex virus type 2
  • Mumps virus
  • HIV

3. Protozoas

  • Primary amoebic meningoencephalitis, e.g., Naegleria fowleri, Balamuthia mandrillaris, Sappinia diploidea
  • Trypanosoma brucei
  • Toxoplasma gondii (sporozoa)

Prognosis[edit | edit source]

As the disease is a combination of two very serious neurological conditions, it is linked with severe morbidity and high mortality rate.

Clinical Presentation[edit | edit source]

Patients present with symptoms of both meningitis and encephalitis.

Diagnosis[edit | edit source]

Meningoencephalitis can be dignosed through any of the following like meningitis and encephalitis;

  • Magnetic Resonance Imaging (MRI)
  • Electroencephalography (EEG)
  • Lumbar puncture (spinal tap)
  • Urine analysis
  • Blood test

Management / Intervention[edit | edit source]

Intervention is generally symptomatic and may include various management strategies of meningitis and encephaliti depending on which symptoms are expressed as related to both medical and Physiotherapy managements.

References[edit | edit source]

  1. Greenberg RW, Lane EL, Cinnamon J, Farmer P, Hyman RA. The cranial meninges: anatomic considerations. InSeminars in Ultrasound, CT and MRI 1994 Dec 1 (Vol. 15, No. 6, pp. 454-465). WB Saunders.
  2. Sapra H, Singhal V. Managing meningoencephalitis in indian icu. Indian Journal of Critical Care Medicine: Peer-reviewed, Official Publication of Indian Society of Critical Care Medicine. 2019 Jun;23(Suppl 2):S124.
  3. Aminoff M. Josephson SA. Aminoff's Neurology and General Medicine.6th Edition. Elsevier Science & Technology. 2021.
  4. Newton PJ, Newsholme W, Brink NS, Manji H, Williams IG, Miller RF. Acute meningoencephalitis and meningitis due to primary HIV infection. British Medical Journal (Clinical research ed.). 2002;325 (7374): 1225–7.
  5. Del Saz SV, Sued O Falcó V, Agüero F Crespo M, Pumarola T, Curran A, Gatell JM.  Acute meningoencephalitis due to human immunodeficiency virus type 1 infection in 13 patients: clinical description and follow-up. Journal of neurovirology. 2008;14 (6): 474–9.