Cited by 42Mosquito-borne diseases and controlInfectious Encephalopathies and EncephalitisLong-Term Effects of COVID-19

Neuropsychological Impact of West Nile Virus Infection: An Extensive Neuropsychiatric Assessment of 49 Cases in Canada

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Samaan, Zainab, McDermid Vaz, Stephanie, Bawor, Monica, Potter, Tammy Hlywka, Eskandarian, Sasha, Loeb, Mark·2016·PLOS ONE

Abstract

BACKGROUND: West Nile virus emerged as an important human pathogen in North America and continues to pose a risk to public health. It can cause a highly variable range of clinical manifestations ranging from asymptomatic to severe illness. Neuroinvasive disease due to West Nile virus can lead to long-term neurological deficits and psychological impairment. However, these deficits have not been well described. The objective of this study was to characterize the neuropsychological manifestations of West Nile virus infection with a focus on neuroinvasive status and time since infection. METHODS: Patients from Ontario Canada with a diagnosis of neuroinvasive disease (meningitis, encephalitis, or acute flaccid paralysis) and non-neuroinvasive disease who had participated in a cohort study were enrolled. Clinical and laboratory were collected, as well as demographics and medical history. Cognitive functioning was assessed using a comprehensive battery of neuropsychological tests. RESULTS: Data from 49 individuals (32 with West Nile fever and 17 with West Nile neuroinvasive disease) were included in the present cross-sectional analysis. Patterns of neuropsychological impairment were comparable across participants with both neuroinvasive and non-neuroinvasive West Nile virus infection on all cognitive measures. Neuropsychiatric impairment was also observed more frequently at two to four years post-infection compared to earlier stages of illness. CONCLUSIONS: Our data provide objective evidence for cognitive difficulties among patients who were infected with West Nile virus; these deficits appear to manifest regardless of severity of West Nile virus infection (West Nile fever vs. West Nile neuroinvasive disease), and are more prevalent with increasing illness duration (2-4 years vs. 1 month). Data from this study will help inform patients and healthcare providers about the expected course of recovery, as well as the need to implement effective treatment strategies that include neuropsychological interventions.

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  • Patients recovering from viral encephalitis often show severe neurological sequelae, including deficits in memory, visuospatial and verbal learning, and motor and executive functions.

    “Patients recovering from viral encephalitis often show severe neurological sequelae, including deficits in memory, visuospatial and verbal learning, and motor and executive functions [111, 209, 272, 329, 340].”

    From Microglia and monocytes in inflammatory CNS disease: integrating phenotype and function (2022) · cites this paper as [272]

    The Results report impairments in memory, verbal and visual learning, motor function, and executive function among patients with West Nile virus infection. But the sample included both West Nile fever and neuroinvasive disease, not only patients recovering from encephalitis. Visuospatial impairment was reported in 3%–6%, so the paper does not establish that severe sequelae across these domains are common after viral encephalitis generally. Page numbers were not supplied in our copy. (LLM, conf=0.86)

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  • Movement disorders persist for months to years in WNE patients.

    “Movement disorders persist for months to years [83, 87–91].”

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Research works printed but not linked: 5

  1. [4]West Nile Virus Activity—United States, 2003. MMWR Morb Mortal Wkly Rep 12924429
  2. [44]Benedict R, Schretlen D, Brandt J, Groninger L: Revision of the Hopkins verbal learning test: reliability and normative data. Clin Neuropsychol 1998, 12: 43– 55.
  3. [51]Culbertson W, Zilmer E: Tower of London-DX 2nd Edition (TOL-DX 2nd Edition) Technical Manual. In. North Tonawanda, NY: Multi-Health Systems; 2004.
  4. [57]DesRosiers G, Kavanagh D: Cognitive assessment in closed head injury: Stability, validity and parallel forms for two neuropsychological measures of recovery. International Journal of Clinical Neuropsychology 1987.
  5. [65]Groth-Marnat G, Gallagher R, Hale J, Kaplan E: Wescsler Intelligence Scales In: Neuropsychological assessmeent in clinical practice. edn. Edited by Groth-Marnat G. New York: Wiley; 2000: 129– 194.

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Authors
Samaan, Z., McDermid Vaz, S., Bawor, M., Potter, T. H., Eskandarian, S., & Loeb, M.
Affiliations
McMaster University (CA)
Corresponding author
Loeb, Mark
Venue
PLOS ONE
Published
2016-06-28
Volume
11
Issue
6
Pages
e0158364
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2465915302
Cited by
42
References
79
Citations by year
2026: 5 · 2025: 2 · 2024: 3 · 2023: 7 · 2022: 2 · 2021: 3 · 2020: 6 · 2019: 4 · 2018: 8 · 2017: 2
FWCI
4.63
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Mosquito-borne diseases and control
  • Health Sciences › Medicine › Infectious Diseases › Infectious Encephalopathies and Encephalitis
  • Health Sciences › Medicine › Neurology › Long-Term Effects of COVID-19
Keywords
West Nile virus, neuroinvasive disease, neuropsychological deficits, cognitive impairment, West Nile fever, meningitis, encephalitis, acute flaccid paralysis, long-term neurological sequelae, neuropsychological assessment
MeSH terms
Adult, Aged, Cognition Disorders, Female, Humans, Male, Middle Aged, Ontario, West Nile Fever

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