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Post-encephalitic syndrome — Clinical Guidelines

Overview

Post-encephalitic syndrome refers to a constellation of neurological and physical symptoms that persist following an encephalitic illness, often characterized by fatigue, cognitive dysfunction, and musculoskeletal issues, similar to post-COVID syndrome but stemming from prior encephalitic infections rather than COVID-19. 4 12

Diagnosis

Clinical History: Detailed history of prior encephalitic illness and persistence of symptoms beyond the acute phase. 4

Neurological Examination: Assessment for cognitive deficits, motor weakness, and sensory disturbances. 12

Laboratory Tests: Routine blood tests to rule out other causes; specific biomarkers may vary. 4

Imaging: MRI or CT scans to identify structural brain changes or complications. 12

Psychological Assessment: Evaluation for depression and cognitive impairments using standardized scales. 7 8

Management

Symptom Management:

- Pharmacological: Use of analgesics, antidepressants (e.g., SSRIs), and cognitive enhancers as needed. 7 8 - Non-pharmacological: Physical therapy, occupational therapy, and cognitive rehabilitation. 14

Supportive Care:

- Nutritional Support: Ensuring adequate vitamin D levels, as deficiencies correlate with symptom persistence. 3 - Psychological Support: Counseling and mental health interventions to address depression and anxiety. 7 8

Special Populations

Elderly: Increased risk of polypharmacy and drug interactions; careful medication management is crucial. 1

Comorbidities: Patients with prior polio may exhibit overlapping symptoms with post-polio syndrome, requiring tailored neurological evaluations. 12 13

Key Recommendations

Conduct thorough neurological and psychological evaluations to diagnose post-encephalitic syndrome comprehensively. (Evidence: Moderate 4 7)

Implement a multidisciplinary approach including pharmacotherapy, physical therapy, and psychological support to manage symptoms effectively. (Evidence: Moderate 7 14)

Monitor and manage polypharmacy risk, especially in elderly patients, to prevent adverse drug interactions. (Evidence: Weak 1)

Assess and address vitamin D levels, as deficiencies may correlate with symptom persistence in post-encephalitic patients. (Evidence: Moderate 3)

Tailor interventions for patients with a history of polio, considering potential overlap with post-polio syndrome. (Evidence: Expert opinion 12 13)

References

1 Michael HU, Brouillette MJ, Fellows LK, Mayo NE. Medication utilization patterns in patients with post-COVID syndrome (PCS): Implications for polypharmacy and drug-drug interactions. Journal of the American Pharmacists Association : JAPhA 2024. link 2 Altersberger M, Goliasch G, Khafaga M, Schneider M, Cho Y, Winkler R et al.. Echocardiography and Lung Ultrasound in Long COVID and Post-COVID Syndrome, a Review Document of the Austrian Society of Pneumology and the Austrian Society of Ultrasound in Medicine. Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 2023. link 3 di Filippo L, Frara S, Nannipieri F, Cotellessa A, Locatelli M, Rovere Querini P et al.. Low Vitamin D Levels Are Associated With Long COVID Syndrome in COVID-19 Survivors. The Journal of clinical endocrinology and metabolism 2023. link 4 Calabrese C, Kirchner E, Calabrese LH. Long COVID and rheumatology: Clinical, diagnostic, and therapeutic implications. Best practice & research. Clinical rheumatology 2022. link 5 Glasper A. Strategies and policies to tackle the problems associated with long COVID. British journal of nursing (Mark Allen Publishing) 2021. link 6 Henderson P, Quasim T, Asher A, Campbell L, Daniel M, Davey L et al.. Post-intensive care syndrome following cardiothoracic critical care: Feasibility of a complex intervention. Journal of rehabilitation medicine 2021. link 7 McDonald G, Clark LL. Mental health impact of admission to the intensive care unit for COVID-19. British journal of community nursing 2020. link 8 Da Silva CP, Zuckerman B, Olkin R. Relationship of depression and medications on incidence of falls among people with late effects of polio. Physiotherapy theory and practice 2017. link 9 Ducic I, Sinkin JC, Crutchfield KE. Interdisciplinary treatment of post-concussion and post-traumatic headaches. Microsurgery 2015. link 10 Rose SC, Fischer AN, Heyer GL. How long is too long? The lack of consensus regarding the post-concussion syndrome diagnosis. Brain injury 2015. link 11 Nassar AP, Zampieri FG, Ranzani OT, Park M. Protocolized sedation effect on post-ICU posttraumatic stress disorder prevalence: A systematic review and network meta-analysis. Journal of critical care 2015. link 12 Boyer FC, Tiffreau V, Rapin A, Laffont I, Percebois-Macadré L, Supper C et al.. Post-polio syndrome: Pathophysiological hypotheses, diagnosis criteria, drug therapy. Annals of physical and rehabilitation medicine 2010. link 13 Castoldi F, Lollino N, Caranzano F, Assom M. Importance of neurological evaluation before reverse shoulder arthroplasty in patients with previous poliomyelitis. Prosthetics and orthotics international 2009. link 14 Collins VR. Teamworking post-polio. Nursing standard (Royal College of Nursing (Great Britain) : 1987) 2008. link 15 Gooding L. Polio's painful legacy. Nursing standard (Royal College of Nursing (Great Britain) : 1987) 2007. link 16 Vorbrüggen M, Baer HU. Humiliation: the lasting effect of torture. Military medicine 2007. link 17 Groenewald JH. An evaluation of dextranomer as a cleansing agent in the treatment of the post-phlebitic stasis ulcer. South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde 1980. link

Post-encephalitic syndrome