COVID-19-associated encephalitis

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Wajeeha Aiman, M.D.[2]

Synonyms and keywords: Encephalitis covid-19

Overview

Encephalitis is inflammation of the brain parenchyma and it is commonly caused by viruses. COVID-19 is a virus related to the severe acute respiratory syndrome coronavirus (SARS-CoV) group and named as SARS-CoV-2.

Historical Perspective

Classification

Pathophysiology

  • It is thought that this viral encephalitis is the result of multiple pathophysiologic pathways.


 
 
 
 
 
 
 
 
SARS-CoV-2
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ACE2
 
Direct Injury due to Infection
 
Immune Injury
 
Hypoxic Injury
 
Hypercoagulability
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Viral Encephalitis
 
 
 
 
 


Causes

  • To read more about this virus, click here.

Differentiating COVID-19-associated encephalitis from other Diseases

COVID-19-associated encephalitis must be differentiated from other diseases that cause fever, headache, and altered mental status with or without cough, such as

Case courtesy of Dr. Daniel J Bell, Radiopaedia.org, rID: 74536

Risk Factors

Common risk factors in the development of COVID-19-associated encephalitis may be occupational, environmental, and genetic.

Risk factors for COVID-19-associated encephalitis
Autoimmune disease Immunosuppression
Multiple sclerosis Interferon beta

Glatiramer

Corticosteroids

Myasthenia gravis Corticosteroids
Neuromyelitis optica Monoclonal antibody
Sarcoidosis Corticosteroids

Methotrexate

Azathioprine

Sickle cell disease (SCD) Crizanlizumab

Screening

Complications

 
 
 
 
 
 
 
 
Encephalitis
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Memory loss
 
Epilepsy
 
Personality changes
 
Hearing/vision loss
 
Coma/Death


Diagnosis

History and Symptoms

Patient No. Early symptoms Later presentation GCS Lab. Findings Specific Tests
CBC CSF
1. 24-year-old man from Japan[2] Headache,

Fever,

Fatigue

Worsening headache, Sore throat. (Day 5)

Impaired consciousness and transient generalized seizure, (Day 9)

E4V1M1 WBCs and neutrophils
lymphocytes

CRP

Clear and colorless fluid,

Pressure=320mmH2O

Cell count was 12/μL–10 mononuclear and 2 polymorphonuclear cells

RT-PCR of SARS-CoV-2 RNA was + in CSF
2. 35-year-old woman from Turkey[6] Flu like symptoms Headache, nausea, dizziness, and

drug-refractory seizures.

E4V5M6
3. 31-year-old African American woman[8] SCD patient with dyspnea Paralysis and sedation (Day 13)

Comatose (Day 15) and death (Day 16)

E0V0M0

Physical Examination

Treatment

Medical Therapy

The mainstays of medical therapy for viral encephalitis are:

Symptomatic treatments:

Surgical Therapy

References

  1. Velavan TP, Meyer CG (2020). "The COVID-19 epidemic". Trop Med Int Health. 25 (3): 278–280. doi:10.1111/tmi.13383. PMC 7169770 Check |pmc= value (help). PMID 32052514 Check |pmid= value (help).
  2. 2.0 2.1 2.2 Moriguchi T, Harii N, Goto J, Harada D, Sugawara H, Takamino J; et al. (2020). "A first case of meningitis/encephalitis associated with SARS-Coronavirus-2". Int J Infect Dis. 94: 55–58. doi:10.1016/j.ijid.2020.03.062. PMC 7195378 Check |pmc= value (help). PMID 32251791 Check |pmid= value (help).
  3. Riou J, Althaus CL (2020). "Pattern of early human-to-human transmission of Wuhan 2019 novel coronavirus (2019-nCoV), December 2019 to January 2020". Euro Surveill. 25 (4). doi:10.2807/1560-7917.ES.2020.25.4.2000058. PMC 7001239 Check |pmc= value (help). PMID 32019669 Check |pmid= value (help).
  4. Asadi-Pooya AA, Simani L (2020). "Central nervous system manifestations of COVID-19: A systematic review". J Neurol Sci. 413: 116832. doi:10.1016/j.jns.2020.116832. PMC 7151535 Check |pmc= value (help). PMID 32299017 Check |pmid= value (help).
  5. Baig AM (2020). "Neurological manifestations in COVID-19 caused by SARS-CoV-2". CNS Neurosci Ther. 26 (5): 499–501. doi:10.1111/cns.13372. PMC 7163592 Check |pmc= value (help). PMID 32266761 Check |pmid= value (help).
  6. 6.0 6.1 6.2 Efe IE, Aydin OU, Alabulut A, Celik O, Aydin K (2020). "COVID-19-Associated Encephalitis Mimicking Glial Tumor". World Neurosurg. 140: 46–48. doi:10.1016/j.wneu.2020.05.194. PMC 7256557 Check |pmc= value (help). PMID 32479911 Check |pmid= value (help).
  7. Nath A (2020). "Neurologic complications of coronavirus infections". Neurology. 94 (19): 809–810. doi:10.1212/WNL.0000000000009455. PMID 32229625 Check |pmid= value (help).
  8. Benameur K, Agarwal A, Auld SC, Butters MP, Webster AS, Ozturk T; et al. (2020). "Encephalopathy and Encephalitis Associated with Cerebrospinal Fluid Cytokine Alterations and Coronavirus Disease, Atlanta, Georgia, USA, 2020". Emerg Infect Dis. 26 (9). doi:10.3201/eid2609.202122. PMID 32487282 Check |pmid= value (help).


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