• Pierre Fillatre, Alexandra Mailles, Jean Paul Stahl, Pierre Tattevin, and Scientific Committee and Investigators Group.
• Intensive care unit, Centre Hospitalier Yves Le Foll, Saint Brieuc, France; INSERM, CIC 1414, Rennes, France. Electronic address: pierre.fillatre@armorsante.bzh.
• J Crit Care. 2023 Oct 1; 77: 154300154300.

PurposeInfectious encephalitis (IE) is a severe disease which requires intensive care unit (ICU) admission in up to 50% of cases. We aimed to describe characteristics, management and outcomes of IE patients who required ICU admission.Materials And MethodsAncillary study focusing on patients with ICU admission within the ENCEIF cohort, a French prospective observational multicentre study. The primary criteria for outcome was the functional status at hospital discharge, categorized using the Glasgow outcome scale (GOS). Logistic regression model was used to identify risk factors for poor outcome, defined as a GOS ≤ 3.ResultsWe enrolled 198 ICU patients with IE. HSV was the primary cause (n = 72, 36% of all IE, 53% of IE with microbiological documentation). Fifty-two patients (26%) had poor outcome at hospital discharge, including 22 deaths (11%). Immunodeficiency, supratentorial focal signs on admission, lower cerebrospinal fluid (CSF) white cells count (<75/mm3), abnormal brain imaging, and time from symptoms onset to acyclovir start >2 days were independent predictors of poor outcome.ConclusionHSV is the primary cause of IE requiring ICU admission. IE patients admitted in ICU have a poor prognosis with 11% of in-hospital mortality and 15% of severe disabilities in survivors at discharge.Copyright © 2023 Elsevier Inc. All rights reserved.

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