Anti-HEV Antibodies

Function

The Anti-HEV (Hepatitis E Virus) Antibodies test detects the body's immune response to an infection with the Hepatitis E virus. HEV is a common cause of acute viral hepatitis worldwide, typically transmitted via the fecal-oral route through contaminated water or undercooked meat (particularly pork or venison). The test usually distinguishes between two types of antibodies: IgM and IgG. Anti-HEV IgM appears early in the course of infection and indicates an acute or recent infection. Anti-HEV IgG appears later and persists for years, indicating a past infection and providing some level of immunity.

Why it is Ordered

This test is ordered for patients presenting with symptoms of acute hepatitis—such as jaundice (yellowing of the skin/eyes), dark urine, fatigue, nausea, and abdominal pain—especially if they have recently traveled to endemic areas or have a history of consuming high-risk foods. It is particularly crucial for pregnant women, as HEV infection in the third trimester carries a high risk of fulminant hepatic failure and mortality. It is also used to screen immunocompromised patients (like organ transplant recipients) who may develop chronic Hepatitis E, a condition that can lead to rapid cirrhosis.

Associated Conditions

• Acute Hepatitis E: The primary illness caused by the virus, usually self-limiting in healthy individuals.
• Fulminant Hepatic Failure: A severe, life-threatening complication, most common in pregnant women or those with pre-existing liver disease.
• Chronic Hepatitis E: Occurs almost exclusively in immunocompromised patients, potentially leading to liver scarring.
• Neurological Manifestations: HEV has been linked to conditions like Neuralgic Amyotrophy and Guillain-Barré Syndrome.