| Hepatitis A |
- or infectious jaundice
- caused by a picornavirus
- transmitted by the orofecal route, and can be spread through personal contact, consumption of raw sea food or drinking contaminated water
- it causes an acute form of hepatitis and does not have a chronic stage
- people with hepatitis A are advised to rest, stay hydrated and avoid alcohol
- the time between the infection and the start of the illness can run from 15 to 45 days
- vaccine is available
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| Hepatitis B |
- caused by a hepadnavirus
- can be both acute or chronic
- identified methods of transmission include blood (blood transfusion, now rare), tattoos (both amateur and professionally done), sexually (through sexual intercourse or through contact with blood or bodily fluids), or in utero (from mother to her unborn child, as the virus can cross the placenta)
- vaccine is available
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| Hepatitis C |
- aka originally "non-A non-B hepatitis"
- caused by a Flavivirus
- it can be transmitted through contact with blood (including through sexual contact where the two parties' blood is mixed)
- may lead to a chronic form of hepatitis, culminating in cirrhosis
- it can remain asymptomatic for 10-20 years
- can cause cirrhosis of the liver
- no vaccine is available
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| Hepatitis B with D |
- caused by a small circular RNA virus (Hepatitis delta virus or hepatitis D virus, HDV).
- a subviral satellite because it can propagate only in the presence of another virus, the hepatitis B virus (HBV)
- transmission can occur either via simultaneous infection with HBV (coinfection) or via infection of an individual previously infected with HBV (superinfection)
- results in more severe complications compared to infection with HBV alone
- complications include a greater likelihood of experiencing liver failure in acute infections and a greater likelihood of developing liver cancer in chronic infection
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| Hepatitis E |
- produces symptoms similar to hepatitis A
- it can take a fulminant course in some patients, particularly pregnant women
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| Hepatitis F (existence unknown) |
it is a hypothetical virus linked to hepatiti |
| Hepatitis G |
probably spread by blood and sexual contact |
| Other viruses |
- mumps virus
- rubella virus
- cytomegalovirus
- Epstein-Barr virus
- other herpes viruses
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| Alcoholic Hepatitis |
- usually alcoholic hepatitis comes after a period of increased alcohol consumption
- feeling unwell, enlargement of the liver, development of fluid in the abdomen ascites, and modest elevation of liver blood tests
- severe liver inflammation with development of jaundice, prolonged prothrombin time, and liver failure
- severe cases are characterized by either obtundation (dulled consciousness) or the combination of elevated bilirubin levels and prolonged prothrombin time
- alcoholic hepatitis can occur in patients with chronic alcoholic liver disease and alcoholic cirrhosis
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| Other toxins |
- drugs
- amatoxin-containing mushrooms
- white phosphorus, an industrial toxin
- paracetamol can cause hepatitis when taken in an overdose
- carbon tetrachloride, chloroform, and trichloroethylene, all chlorinated hydrocarbons
- cylindrospermopsin
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| Metabolic disorders |
- Hemochromatosis (due to iron accumulation)
- Wilson's disease (copper accumulation)
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| Obstructive |
- jaundice due to obstruction of the bile duct (by gallstones or external obstruction by cancer)
- If longstanding it leads to destruction and inflammation of liver tissue
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| Autoimmune |
anomalous presentation of human leukocyte antigen (HLA) class II on the surface of hepatocyte causes a cell-mediated immune response against the body's own liver |
| Alpha 1-antitrypsin deficiency |
In severe cases of alpha 1-antitrypsin deficiency (A1AD), the accumulated protein in the endoplasmic reticulum causes liver cell damage and inflammation |
| Nonalcoholic steatohepatitis |
- resembles alcoholic hepatitis on liver biopsy (fat droplets, inflammatory cells, but usually no Mallory's hyalin) but occurs in patients who have no known history of alcohol abuse
- more common in women and the most common cause is obesity or the metabolic syndrome
- a related but less serious condition is called "fatty liver" (steatosis hepatis)
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