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The liver is one of the organs that helps with digestion but is not part of the digestive tract. It is the largest organ in the body and carries out many important functions, such as making bile, changing food into energy, and cleaning alcohol and poisons from the blood.
Hepatitis is inflammation of the liver that sometimes causes permanent damage. It is caused by viruses, bacteria, certain medicines, or alcohol. It may also be caused by certain diseases such as: autoimmune diseases, metabolic diseases, and congenital (present at birth) abnormalities (biliary atresia, Wilson's disease). Generally, symptoms of hepatitis include fever, jaundice, and an enlarged liver. There are several types of hepatitis.
Hepatitis B (HBV) is a blood-borne microorganism transmitted by exposure to the hepatitis B virus through infectious body fluids or blood.
Hepatitis B is one of the most frequently reported, vaccine-preventable diseases in the United States. It is estimated that 2,000 to 5,000 deaths will occur each year from a chronic HBV infection, and an estimated 800,000 to 1.4 million people have chronic hepatitis B.
Hepatitis B has a wide range of symptoms. It may be mild, without symptoms, or it may cause chronic hepatitis. In some cases, hepatitis B can lead to full-blown liver failure and death. The following are the most common symptoms of hepatitis B. However, each individual may experience symptoms differently. Symptoms may include:
The symptoms of hepatitis B may resemble other medical conditions or problems. Most children, 4 years or younger, and newly infected immunosuppressed adults are asymptomatic, whereas 30% - 50% of persons, 5 years and older, have initial signs and symptoms. Always consult your physician for a diagnosis.
Transmission of hepatitis B virus occurs through blood and body fluid exposure such as blood, semen, vaginal secretions, or saliva. Needle sticks, sharp instruments, sharing items (razors, toothbrushes) and sex with an infected person are primary modes of transmission. Infants may also develop the disease if they are born to a mother who has the virus. Infected children often spread the virus to other children if there is frequent contact or a child has many scrapes or cuts.
One out of 20 people in the US will develop hepatitis B at some time during their lives. The following describe persons who are at risk for developing hepatitis B:
A vaccine for hepatitis B does exist and is now widely used for routine childhood immunization.
A vaccine for the prevention of hepatitis B is available. Given in three shots over a period of time, the vaccine is suggested for everyone age 18 years and younger, as well as for adults over age 18 who are at risk for the infection.
In addition to a complete physical examination and laboratory tests for blood and urine, diagnostic procedures for hepatitis B may involve a liver biopsy (a procedure performed to remove tissue or cells from the body for examination under a microscope).
Specific treatment for hepatitis B will be determined by your physician based on:
Treatment may include biological therapy with interferon. Currently, there is no cure for hepatitis B. Prevention is crucial.