L28:Hepatitis viruses

Question 1

what is the only DNA hepatitis virus ?

Answer 1

HBV

Question 2

Which antigen is an important indicator of transmissibility when it comes to HBV infection?

Answer 2

E antigen (HBeAg)

Question 3

what is the infectious form of HBV>?

Answer 3

Dane particle

Question 4

HBV infection results in hepatocellular injury due to :

Answer 4

immune attack of CD8 T cells

Question 5

life-long immunity against HBV (after infection) is mediated by ?

Answer 5

HBsAg antibodies

Question 6

high rate of hepatocellular carcinoma occurs in :

Answer 6

chronic carriers

Question 7

what’s the criteria for labelling a patient as a carrier for HBV?

Answer 7

presence of HBsAg in blood for more than 6 months

Question 8

which group of HBV patients have high E antigen concentration and there for have a high probability of transmitting the disease?

Answer 8

chronic carriers

Question 9

which hepatitis infection is dependent on hepatitis B being already present in the body ?

Answer 9

Hepatitis D , it cannot replicate on its own

Question 10

describe the 2 types of hepatitis D infections that can occur .

Answer 10

coinfection with HBV :severe acute disease with low risk of chronic infection

superinfection on top of chronic HBV : Severe chronic liver disease (life threatening )

Question 11

immunoglobulin for HBV infection ?

Answer 11

hyperimmune hepatitis B immune globulin (one dose)

Question 12

post exposure prophylaxis for HBV :

Answer 12

hyperimmune hepatitis B immune globulin + vaccine

Question 13

hepatitis C is from which family of viruses :

Answer 13

flavivridae

Question 14

which hepatitis virus is a major cause of post transfusion hepatitis ?

Answer 14

HCV

Question 15

which hepatitis virus is a typical enterovirus ?

Answer 15

HAV

Question 16

What is the only hepatitis virus that can be cultivated in vitro?

Answer 16

HAV

Question 17

which hepatitis infection causes infectious hepatitis ?

Answer 17

HAV

Question 18

Groups at increased risk of infection by HAV :

Answer 18

travelers to developing countries

drug users

chronic liver disease patients

Question 19

which hepatitis viruses have only one serotype ?

Answer 19

HAV , HEV

Question 20

HEV is also called :

Answer 20

Enterically transmitted NANB or epidemic NANB hepatis

NANB bas

Question 21

HEV is particularly severe in :

Answer 21

third trimester of pregnancy

Question 22

which hepatitis viruses are enveloped ?

Answer 22

HBV HCV HDV

AND RESPONSIBLE FOR CHRONIC LIVER DISEASE

Question 23

Which hepatitis virus has a helical structure ?

Answer 23

HDV

Question 24

Which hepatitis viruses are transmitted through feco-oral route ?

Answer 24

HAV HEV