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A Case Series of Powassan Meningoencephalitis in a Single Institution in Connecticut With One Case Resembling Herpes Simplex Virus (HSV) Meningoencephalitis on MRI

Year: 2025

Type: article

Abstract: ), with peak transmission during summer and fall. Most patients are asymptomatic; those who develop symptoms usually present with flu-like symptoms or neuroinvasive disease, including encephalitis, meningoencephalitis, or aseptic meningitis. The gold standard test for diagnosis is serological testing. The treatment is usually supportive care. In this case series, we have reported two cases that presented with fever, generalized weakness, and changes in mentation, later diagnosed with POWV meningoencephalitis. The magnetic resonance imaging (MRI) findings in the first case were suggestive of herpes simplex virus (HSV), imposing a diagnostic challenge. Patients might end up with cognitive impairment, speech difficulties, headaches, imbalance, and ophthalmoplegia as long-term consequences, and both of our cases had cognitive impairment, and one case had weakness, requiring further neuropsychiatry evaluation, as well as physical therapy. Although cases of POWV encephalitis are very rare, these cases describe the importance of serological testing for POWV, especially in endemic areas, in patients with a known or unknown history of tick bite.

Source: Cureus

DOI: 10.7759/cureus.83373

Authors: Anup Uprety, Tapasya Bhusal, Juan Crespo-Quezada, Felipe Carmona Pires, Christopher Morgan

Institution: Danbury Hospital

Language: English

Topic: Infectious Encephalopathies and Encephalitis

Subfield: Infectious Diseases

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: diamond

OpenAlex ID: W4410062078