Acute Hepatitis E by a New Isolate Acquired in the United States

Objective To report the first case of acute hepatitis E by a novel isolate acquired in the United Statesand confirmed by nucleotide sequencing. Materia and Methods: We describe the clinical manifestations and the results of associated labora-tory studies in a man who was found to have acute hepatitis E infection. Results A 62-year-old man was hospitalized because of fever, abdominal pain, and jaundice. After an initial evaluation did not provide a cause, his serum was found to be positive for IgG anti-hepatitis Evirus (HEV) by three antibody assays. Serum was also positive for HEV RNA by reverse transcriptase polymerase chain reaction (PCR). Sequencing resultsfrom the PCR products demonstrated substantial differences at the nucleotide level between this strain andthe known Mexican and Burmese strains. Conclusion On the basis of this initial report, HEV should be considered an etiologie agent in patients with acute non-ABC hepatitis in the United States.