Eastern Equine Encephalitis: Case Series in Southern New England and Review of the Literature
ABSTRACTPurposeof review: To describe the clinical presentation, diagnosis, management and outcomes of four confirmed Eastern Equine Encephalitis (EEE) cases and a review of the literatureRecent findings:There was a sharp rise in the number of EEE cases in the US in 2019, with 38 confirmed cases and 15 deaths. Our institution cared for 10% of patients with neuro-invasive EEE nationwide. These were the first cases seen locally since 2010.Summary:EEE virus causes one of the most lethal types of arboviral encephalitis in the US with a mortality of 30-40%. Manifestations of EEE infections can range from mild encephalopathy to coma. Common findings include CSF pleocytosis and involvement of the basal ganglia on MRI. Given the rarity of this disease and nonspecific findings, diagnosis can be challenging and a high clinical suspicion is important. Management is mainly supportive and the use of IVIg remains controversial. Two of our four patients died; these patients had coma within 48 hours, hyponatremia, involvement of bilateral thalami and brainstem, status epilepticus, and severe brain dysfunction in EEG.