Hepatitis a virus

Hepatitis A virus (HAV) is a type of virus that primarily infects the liver. It is one of several viruses that cause hepatitis, a medical condition characterized by inflammation of the liver.

Overview

HAV is a member of the Picornaviridae family and is classified within the genus Hepatovirus. It is a non-enveloped virus with a single-stranded RNA genome. The virus is primarily transmitted through the fecal-oral route, either by direct contact with an infected person or by ingestion of contaminated food or water.

Clinical Features

Infection with HAV can range from a mild illness lasting a few weeks to a severe illness lasting several months. Symptoms may include fatigue, nausea, abdominal pain, loss of appetite, and jaundice. However, not everyone who is infected will have all of these symptoms.

Prevention and Treatment

Vaccination is the most effective way to prevent HAV infection. The hepatitis A vaccine is safe and effective and is recommended for all children at age 1 year, travelers to certain countries, and others at risk.

There is no specific treatment for HAV. Most people with hepatitis A will recover on their own with rest, adequate nutrition, and fluids. In severe cases, hospitalization may be required.

See Also

• Hepatitis B virus
• Hepatitis C virus
• Hepatitis D virus
• Hepatitis E virus