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Drugs
Published in: Drugs 2/2013

01-02-2013 | Therapy in Practice

Acute Viral Infections of the Central Nervous System in Immunocompetent Adults: Diagnosis and Management

Authors: Marie Studahl, Lars Lindquist, Britt-Marie Eriksson, Göran Günther, Malin Bengner, Elisabeth Franzen-Röhl, Jan Fohlman, Tomas Bergström, Elisabeth Aurelius

Published in: Drugs | Issue 2/2013

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Abstract

Patients with viral infections of the central nervous system (CNS) may present with a variety of neurological symptoms, most commonly dominated by either encephalitis or meningitis. The aetiological panorama varies in different parts of the world as well as over time. Thus, virological first-line diagnostics must be adapted to the current epidemiological situation and to the individual patient history, including recent travels. This review focuses on the diagnostics and treatment of viral CNS infections in the immunocompetent host from a Northern European perspective. Effective vaccines are available for viruses such as poliovirus and tick-borne encephalitis virus (TBEV) and for the childhood diseases morbilli (measles), rubella (German measles), parotitis (mumps) and varicella (chickenpox). However, cases do appear due to suboptimal immunization rates. In viral CNS infections, epidemiological surveillance is essential for establishing preventive strategies and for detecting emerging viruses. Knowledge of the possibilities and limitations of diagnostic methods for specific viral CNS infections is vital. A positive cerebral spinal fluid (CSF) polymerase chain reaction (PCR) finding is usually reliable for aetiological diagnosis. The demonstration of intrathecal antibody synthesis is useful for confirming the aetiology in a later stage of disease, hitherto sufficiently evaluated in herpes simplex encephalitis (HSE) and tick-borne encephalitis (TBE). Despite improved virological and differential diagnostic methods, aetiology remains unknown in about half of the cases with suspected viral encephalitis. Antiviral treatment is available chiefly for infections caused by herpesviruses, and acyclovir (aciclovir) is the drug of choice for empirical therapy in suspected viral encephalitis. However, randomized, controlled antiviral trials have only been conducted for HSE, while such studies are lacking in other viral CNS infections. Viral cytolysis and immune-mediated mechanisms may contribute to varying extents to neurological damage. Although the brain damage is believed to depend, to a varying degree, on the intrathecal host immune response, the use of corticosteroids in viral CNS infections is scarcely studied, as is specific treatment for neuroinflammation. Improved antiviral and immunomodulating treatment is desirable. Since neurological sequelae are still abundant, follow-up after severe viral CNS disease must include a neuropsychological assessment and an individually adapted rehabilitation plan.
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Metadata
Title
Acute Viral Infections of the Central Nervous System in Immunocompetent Adults: Diagnosis and Management
Authors
Marie Studahl
Lars Lindquist
Britt-Marie Eriksson
Göran Günther
Malin Bengner
Elisabeth Franzen-Röhl
Jan Fohlman
Tomas Bergström
Elisabeth Aurelius
Publication date
01-02-2013
Publisher
Springer International Publishing AG
Published in
Drugs / Issue 2/2013
Print ISSN: 0012-6667
Electronic ISSN: 1179-1950
DOI
https://doi.org/10.1007/s40265-013-0007-5

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