Hepatitis Flashcards
How is Hep A transmitted
Faecal-oral
What is the incubation of Hep A
28 days
Most infective a week before symptoms appear till a few days after
What are the symptoms of Hep A
Mild Fever Malaise Anorexia N+V Abdominal pain Jaundice Dark urine / pale stools HSM
Who is at risk of Hep A
MSM PWID Sewage workers Haemophiliacs Travel Chronic liver disease
How do you diagnose Hep A
IgM Anti-HAV
IgG reflects past exposure + immunity
Elevated liver enzymes
What is the Rx of Hep A
No specific treatment
Human Ig prophylaxis
Vaccine (active if high risk)
Complications of Hep A
No chronic damage
Prolonged fatigue / jaundice
How is Hep B transmitted
Vertical - babies
Horizontal - blood / sexual / body fluids
Who is high risk of Hep B and advised active immunisation?
PWID MSM Multiple partners Immigration Haemodialysis / haemophiliac Babies with risk mother Close contacts Health care personal Tattoos / piercings
Explain hepatitis B virus virology?
HbsAg = surface antigen
HBcAg = core antigen which secretes E antigen detected in blood
Viral DNA
E antigen and viral DNA = highly infectious
What is the incubation of Hep B
Weeks - 6 months
What are the symptoms of Hep B
Fever Lethargy Anorexia N+V Abdominal pain Arthralgia Skin lesion Dark urine Jaundice
What is the risk of chronic infection with Hep B?
Neonates = 90% chronic
In adults = 90% recovery
Fulminant Hepatic Necrosis <1%
- DIC
- Encephalpathy
What is chronic Hep B
Presence of HBsAg > 6 months
More likely if immunocompromised
Complications of chronic Hep B
Cirrhosis Hepatoma Membranous GN Polyarteritis Nodosa Cryroglobulinaemia Vasculitis rash
EPP restrictions with Hep B
Can’t perform if
HBeAg / HBsAg +ve
Viral DNA >1000
Hep C
How do you diagnose Hep B
Increased liver enzymes
Anti HbC IgM + IgG
How do you treat Hep B
Anti-viral if
- cirrhosis
- HBV >2000
- increased ALT
- significant inflammation
Hb IG
Pegylated interferon
Liver transplant
Prophylactic Rx of Hep B
Active immunisation (vaccine) given to babies
HBIG if no response to vaccine
HBIG and vaccine for PEP
Given if on chemo as risk of reactivation and family and sexual contacts
How is Hep C transmitted
Blood borne
Very low risk of sexual