Abstract
PeV can cause encephalitis and sepsis-like syndrome in infants, and it should be considered even with normal CSF parameters. Prospective studies are needed to better understand PeV epidemiology and to monitor outbreaks. • PeV is a frequent cause of encephalitis and clinical sepsis in infants in the first 90 days. • Normal CSF parameters in PeV encephalitis and diagnostic importance of MEP to avoid unnecessary prolonged antibiotics and hospitalization.. • Centers for Disease Control and Prevention (CDC) issued a Health Advisory alert in Summer 2022 of uptick PeV encephalitis cases in the USA likely secondary of COVID-19 mitigation measures relaxation, but no comparison with previous years.. • Knowledge of radiological MRI brain characteristics in PeV encephalitis can be a clue diagnosis. • Knowledge of the biennial seasonality pattern in PeV infection. • PeV was the second most detected pathogen in BIOFIRE ME panel in both 2018 and 2022 in our cohort sample.
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