22A patient with HBsAg(+), HBeAg(+) and anti-HBc IgM(+), he is in the status of ________.
A.low infectivity B.late convalescence C.conferring immunity D.active viral replication and high infectivity E.high infectivity
23Which of following is the gene of HBeAg?
A.C gene of HBV. B.Pre-C of HBV. C.X gene of HBV. D.S gene of HBV. E.Pre-S1 and Pre-S2 of HBV.
24Which is false in Hepatitis A?
A.The virus has a single stranded RNA. B.The incubation period is 2 to 6 weeks C.The illness is milder in children.
D.Is maximally infectious at the peak of jaundice E.Can be prevented by active immunity.
25What are complications in severe form hepatitis except:
A.High level of Total bilirubin B.Hepatic encephalopathy C.Bleeding in upper digestive tract
D.Bacterial infections. E.Hepatorenal syndrome
.26For confirm diagnosis of hepatitis A, which of followings is not true?
A.Positive isolation from stool indicates present infection. B.Positive HAV-antigen indicates present infection.
C.Anti-HAV IgG positive indicates acute infection. D.Anti-HAV-IgM positive indicates acute infection
E.Anti-HAV-IgM and anti-HAV-IgG positive indicate current infection.
.27Superinfection of hepatitis D on hepatitis B , which of followings is least possible?
A.Can cause liver failure. B.Cause acute attack of chronic hepatitis B. C.Alleviate the conditions of hepa