Inflammation of the liver, usually caused by any of various infectious agents or toxins, including alcohol and numerous chemical compounds. Symptoms usually include jaundice, fatigue, fever, liver enlargement, and abdominal pain. There are five types of viral hepatitis: A, B,C, D, and E. Hepatitis A, an acute infection caused by a virus of the genus Hepatovirus is transmitted by contaminated food and water. Hepatitis B, caused by a virus of the genus Orthohepadnavirus and Hepatitis C, caused by a virus of the genus Hepacivirus, are more serious infections that are transmitted through infected bodily fluids such as blood and semen.
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