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Definition
By Mayo Clinic staffHepatitis A is a highly contagious liver infection caused by the hepatitis A virus. Hepatitis A is one of several types of hepatitis viruses that cause inflammation that affects your liver's ability to function.
You're most likely to contract hepatitis A from contaminated food or water or from close contact with someone who's already infected. Mild cases of hepatitis A don't require treatment, and most people who are infected recover completely with no permanent liver damage.
Practicing good hygiene — including washing your hands often — is one of the best ways to protect against hepatitis A. Effective vaccines are available for people who are most at risk.
- FAQs for the public. Centers for Disease Control and Prevention. http://www.cdc.gov/hepatitis/A/aFAQ.htm. Accessed July 24, 2009.
- Hepatitis A. American Liver Foundation. http://www.liverfoundation.org/education/info/hepatitisa. Accessed July 24, 2009.
- What I need to know about hepatitis A. National Institute of Diabetes and Digestive and Kidney Diseases. http://digestive.niddk.nih.gov/ddiseases/pubs/hepa_ez/index.htm. Accessed July 24, 2009.
- Sjogren MH. Hepatitis A. In: Feldman M, et al. Sleisenger & Fordtran's Gastrointestinal and Liver Disease: Pathophysiology, Diagnosis, Management. 8th ed. Philadelphia, Pa.: Saunders Elsevier; 2006. http://www.mdconsult.com/das/book/body/151959187-3/0/1389/0.html. Accessed July 24, 2009.
- Fiore AE, et al. Prevention of hepatitis A through active or passive immunization: Recommendations of the Advisory Committee on Immunization Practices (ACIP). MMWR Recommendations and Reports. 2006;55:1. http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5507a1.htm. Accessed July 28, 2009.
- Novak R, et al. Update: Prevention of hepatitis A after exposure to hepatitis A virus and in international travelers. Updated recommendations of the Advisory Committee on Immunization Practices (ACIP). MMWR Weekly. 2007;56:1080. http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5641a3.htm. Accessed July 28, 2009.
- Nguyen CT, et al. Hepatitis vaccination and prophylaxis. Clinics in Liver Disease. 2009;13:317.
- Milk thistle. National Center for Complementary and Alternative Medicine. http://nccam.nih.gov/health/milkthistle/ataglance.htm. Accessed July 29, 2009.
