Microbiology 11 - Viral Hepatitis Flashcards
Recall 2 RFs for Hep A transmission
- Drinking from dodgy water supply
2. MSM
What is the incubation period for hepatitis A?
2-6 weeks
Which immunoglobulin is indicative of current Hep A infection?
IgM
Which immunoglobulin is indicative of previous Hep A infection/ vaccine?
IgG
What test is used to identify acute hepatitis A?
Anti-hepatitis A virus IgM
For how long does hepatitis B infection have to persist to be considered “chronic”?
6 months
What is the incubation period for hepatitis B?
2-6 months
What are the complications of chronic hepatitis B?
Cirrhosis
Hepatocellular carcinoma
Recall the stages of hepatitis B infection
- Immune tolerant
- Immune reactive
- Inactive HBV carrier state
- HBe antigen negative chronic HBV
- HBs antigen negative phase
What treatments are available for chronic hepatitis B?
Peg Interferon alpha
NRTIs (Lamivudine, Tenofovir)
What does the hepatitis B vaccine contain?
Surface antigen
What are the main routes of transmission of hepatitis C?
Blood products
MSM
What % of people who get infected with hepatitis C go on to have chronic hep C?
60-80%
What is the incubation period of hepatitis C?
2 - 6 weeks
What test is used to diagnose hep C infection?
HCV RNA