HEPATITIS, Sle Flashcards
hepatotropic viruses
VIRAL HEPATITIS
common tissue tropism
VIRAL HEPATITIS
most common cause of acute hepatitis
HEPATITIS A VIRUS
does not cause chronic hepatitis and rarely produces fulminant
hepatitis unlike Hepatitis B and C
HEPATITIS A VIRUS
appearance of Ig M anti-HAV in the blood during the acute
illness is the first detectable response to HAV infection
HEPATITIS A VIRUS
first detectable antibody response to this infection is the appearance of IgM
HEPATITIS A VIRUS
the IgG antihepatitis A virus is detected as the patient recovers and persists for life
HEPATITIS A VIRUS
DNA virus
HEPATITIS B VIRUS
HEPATITIS B VIRUS
transmission
o transfusion
o contaminated needles
o breaks in the skin or mucous membrane
o sexual contact
o perinatal
o acute hepatitis with recovery and clearance of the virus
o nonprogressive chronic hepatitis
HEPATITIS B VIRUS
the 2nd circulating Ag to appear
HBeAg
its presence correlates with a period of intense
viral replication
HBeAg
→ indicates progression to chronic infection
→ high infectivity
→ chronic carrier state
HBeAg
massive liver cell necrosis, hepatic failure
→ high mortality
FULMINANT HEPATITIS
presence of necrosis and inflammation in the liver for more than 6 months
CHRONIC HEPATITIS
→ in 5-10% of cases, HBs antigenemia does not resolve
→ 90% male
CHRONIC HEPATITIS
some chronic HBV carriers manifest circulating HBsAg-anti HBs
complexes that cause extrahepatic illness
CHRONIC HEPATITIS
3% never develop anti-HBs and suffer from relentless and
progressive chronic hepatitis that leads to cirrhosis
CHRONIC HEPATITIS
common cause of chronic hepatitis and cirrhosis
HEPATITIS C VIRUS
Flavivirus, RNA virus
HEPATITIS C VIRUS
assembly of this virus in the liver requires the synthesis of HBsAg
o cannot exist without Hepatitis B virus
HEPATITIS D VIRUS (DELTA AGENT)
infection with HDV may occur simultaneously with HBV infection (coinfection) or following HBV infection (superinfection)
HEPATITIS D VIRUS (DELTA AGENT)
Ig M anti-HDV
SUPERINFECTION
(HEPATITIS D VIRUS (DELTA AGENT))
fulminant hepatic failure
o liver necrosis
o liver failure