Hepatitis D

From greek.doctor

The hepatitis D virus is defective, as it lacks certain parts to function. Because of this, it can only cause viral hepatitis when hepatitis B is also present, as the hepatitis D virus requires the hepatitis B surface antigen (HBsAg) for it to function.

Like hepatitis B and C, transmission is parenteral, sexual, or perinatal.

Clinical features

Coinfection with HBV causes more severe acute hepatitis or fulminant hepatitis, but no increased risk of chronic hepatitis.

Superinfection of a person with chronic HBV increases risk of cirrhosis and accelerates disease progression.

Diagnosis and evaluation

Diagnosis is based on serology. IgM anti-HDV indicates acute infection, while IgG anti-HDV indicates chronic infection.