what is a cause of chronic liver disease
chronic hepatitis
what do hepatocytes show
degenerative changes (swelling, vacuolation)
necrosis
shrink
what inflammatory cells are present
what are the causes of acute hepatitis
A
E
what virus is hep A
RNA
how does hep A spread
faecal-oral
is there a vaccine for hep A
vaccine
what virus is hep B
DNA
is hep B spread by blood
yes
is hep B spread by salvia
yes
when is hepatitis A usually seen
autumn
who does hep A affect
children and young adults
where does hep A arise from
ingestion of contaminated food or water
what kind of virus is it
picornavirus
where does hep A replicate
liver
where is hep A excreted
bile and then faeces
symptoms of hep A
then
why do you get dark urine and pale stools
intrahepatic cholestasis
what is liver like in hep A
enlarged
what test for hepatitis A
anti-HAV IgM = acute
treatment for hepatitis A
vaccine
hep B transmission
what does hep B look like
- outer envelope (HBsAG).
what is Hep B core formed from
HBcAG
- contains double stranded DNA