What is hepatitis?
Inflammation of the liver, often caused by viral infection or alcohol-related damage
What are common causes of hepatitis?
Viral infections, alcohol abuse, drugs, autoimmune diseases, and metabolic disorders
What causes alcoholic hepatitis?
Excessive alcohol consumption over time
What is NASH?
Non-alcoholic steatohepatitis, linked to obesity and diabetes
What is autoimmune hepatitis?
The immune system attacks liver cells mistakenly
What causes drug-induced hepatitis?
Medications like paracetamol or prolonged antibiotic use
What are common symptoms of viral hepatitis?
Abdominal pain, fatigue, flu-like illness, pruritus, muscle aches, nausea, vomiting, jaundice
How is hepatitis A transmitted?
Faecal-oral route via contaminated food or water
What virus family does hepatitis A belong to?
Picornavirus (naked RNA virus)
How is hepatitis A diagnosed?
IgM antibodies to hepatitis A
Is there a vaccine for hepatitis A?
Yes
What is the treatment for hepatitis A?
Supportive care; usually resolves on its own
What type of virus is hepatitis B?
Double-stranded DNA virus with reverse transcriptase activity
How is hepatitis B transmitted?
Blood and bodily fluids, including sexual contact and vertical transmission
What percentage of hepatitis B infections become chronic?
5–15%
What are key viral markers for hepatitis B?
HBsAg, HBeAg, HBcAb, HBsAb, HBV DNA
What does HBsAg indicate?
Active infection
What does HBsAb indicate?
Past infection or vaccination
What does HBeAg indicate?
High infectivity and active viral replication
What is the treatment for chronic hepatitis B?
Tenofovir disoproxil, adefovir dipivoxil, lamivudine
Is there a vaccine for hepatitis B?
Yes, given in 3 doses and part of the UK routine schedule
What type of virus is hepatitis C?
Enveloped positive-strand RNA virus (Flaviviridae family)
How is hepatitis C transmitted?
Blood and bodily fluids
Is there a vaccine for hepatitis C?
No