Updated recommendations for adenovirus testing and reporting of children with acute hepatitis of unknown etiology
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Updated recommendations for adenovirus testing and reporting of children with acute hepatitis of unknown etiology

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      Distributed via the CDC Health Alert Network May 11, 2022, 12:15 PM ET CDCHAN-00465 The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Update to provide clinicians and public health authorities with updated information about an epidemiologic investigation of pediatric cases of hepatitis of unknown etiology in the United States. This investigation focuses on collecting information to describe the epidemiology, etiology, clinical presentation, severity, and risk factors related to illness and to identify any relationship between adenovirus infection or other factors and hepatitis. As of May 5, 2022, CDC and state partners are investigating 109 children with hepatitis of unknown origin across 25 states and territories, more than half of whom have tested positive for adenovirus with more than 90% hospitalized, 14% with liver transplants, and five deaths under investigation. Because this investigation is ongoing and includes reviewing cases of hepatitis of unknown cause with onset since October 2021, patients under investigation are not limited to current or newly diagnosed pediatric hepatitis illneses. This HAN Health Update also provides updated recommendations for testing specimens from patients under investigation. It is an update to a HAN Health Advisory that CDC issued on April 21, 2022, that initially notified clinicians and public health authorities of children identified with hepatitis of unknown origin and adenovirus infection.
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