Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 8/30/2025

Aseptic Meningitis: Course and Prognosis

Clinical Presentation and Etiology

  • Aseptic meningitis typically presents with meningism (neck stiffness, headache and photophobia), though fever is not always present, according to the Journal of Infection 2
  • The most common viral etiologies in adults include Enteroviruses, Herpes simplex virus type 2 (HSV-2), and Varicella zoster virus (VZV), as reported by the Journal of Infection 2
  • Viral causes account for 50-80% of aseptic meningitis cases, as stated by the Journal of Infection 2

Prognosis and Long-term Sequelae

  • Mortality is rare in immunocompetent adults with viral meningitis, according to the Journal of Infection 1
  • Headaches are frequently reported as a long-term sequela, occurring in up to one-third of patients, as reported by the Journal of Infection 1
  • Other potential long-term issues include fatigue and sleep disorders, emotional difficulties and psychological impacts, cognitive deficits, arthritis, limb pain, muscle pain, and neuropathic pain, as stated by the Journal of Infection 1

Special Considerations and Follow-up

  • Recurrent episodes of lymphocytic meningitis (Mollaret's meningitis) can occur, most often caused by HSV-2, as reported by the Journal of Infection 3
  • All patients should be assessed for potential long-term sequelae, both physical and psychological, before discharge from hospital, according to the Journal of Infection 1
  • Follow-up care is important, as many issues may only become apparent after discharge, as stated by the Journal of Infection 1
  • Underestimating the psychological impact and need for support during recovery can be a common pitfall, as reported by the Journal of Infection 1
  • Inadequate follow-up care, such as not routinely offering follow-up where needed, can also be a common pitfall, as stated by the Journal of Infection 1
  • Premature return to full activities before complete recovery can be a common pitfall, as reported by the Journal of Infection 1