CH 18 - Viral Hepatitis Flashcards
Of patients in the United States with chronic hepatitis B, _______ of them acquired the virus in childhood.
20% to 30%
The rate of posttransfusion hepatitis C decreased to _______ after the introduction of serologic testing in the screening of blood donors.
15%
The average incubation time for hepatitis A is:
28 days
The average incubation time for hepatitis B is:
90 days
The average incubation time for posttransfusion hepatitis C is ______ weeks.
4–12
Which form of hepatitis does not have a chronic form of the disease?
Hepatitis A
Another name for hepatitis B infection is:
Long incubation hepatitis
The most common clinical response to hepatitis B virus is:
- Asymptomatic infection
AND
- Subclinical infection
The first laboratory screening test of donor blood was for the detection of:
HBsAg
Which surface marker is a reliable marker for the presence of high levels of hepatitis B virus (HBV) and a high degree of infectivity?
HBeAg
The only serologic marker during the anticore window period of hepatitis B (the time between disappearance of detectable HBsAg and appearance of detectable anti-HBs) may be:
Anti-HBc
Which of the following is a characteristic of the delta agent?
Usually replicates only in HBV-infected hosts
Which of the following viruses is rarely implicated in transfusion-associated hepatitis?
Hepatitis A
In health care workers, the risk of contracting hepatitis C is _______the risk of contracting AIDS.
Higher than
The earliest detectable serologic marker of acute hepatitis C is:
HCV-RNA
Primary hepatitis viruses are given this name because they primarily attack:
The liver
Which category has the highest incidence of acute hepatitis C?
Dialysis
Which category has the lowest incidence of acute hepatitis C?
Transfusion
The mode of transmission of hepatitis A is:
Fecal-oral
The mode of transmission of hepatitis B is:
Parenteral
The mode of transmission of hepatitis C is:
Parenteral and nonparenteral
The mode of transmission of hepatitis E is:
Fecal-oral
VCA IgG formation in the following:
No previous exposure:
Recent (acute) infection:
Past infections (convalescent period):
Reactivation of latent infection:
No previous exposure: =
Recent (acute) infection: +
Past infections (convalescent period): +
Reactivation of latent infection: +
EBNA IgG formation in the following:
No previous exposure:
Recent (acute) infection:
Past infections (convalescent period):
Reactivation of latent infection:
No previous exposure: =
Recent (acute) infection: =
Past infections (convalescent period): +
Reactivation of latent infection: +
