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An acute illness with a discrete onset of any sign or symptom consistent with acute viral hepatitis (e.g., anorexia, abdominal discomfort, nausea, vomiting), and either a) jaundice, or b) serum alanine aminotransferase (ALT) levels >400 IU/L.
One or more of the following three criteria:
AND, meets the following two criteria:
Confirmed:a case that meets the clinical case definition, is laboratory confirmed, and is not known to have chronic hepatitis C.
Division of Viral Hepatitis. Guidelines for Viral Hepatitis Surveillance and Case Management. Centers for Disease Control and Prevention. January 2005.
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