CH 18 - Viral Hepatitis Flashcards

1
Q

Of patients in the United States with chronic hepatitis B, _______ of them acquired the virus in childhood.

A

20% to 30%

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2
Q

The rate of posttransfusion hepatitis C decreased to _______ after the introduction of serologic testing in the screening of blood donors.

A

15%

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3
Q

The average incubation time for hepatitis A is:

A

28 days

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4
Q

The average incubation time for hepatitis B is:

A

90 days

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5
Q

The average incubation time for posttransfusion hepatitis C is ______ weeks.

A

4–12

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6
Q

Which form of hepatitis does not have a chronic form of the disease?

A

Hepatitis A

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7
Q

Another name for hepatitis B infection is:

A

Long incubation hepatitis

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8
Q

The most common clinical response to hepatitis B virus is:

A
  1. Asymptomatic infection

AND

  1. Subclinical infection
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9
Q

The first laboratory screening test of donor blood was for the detection of:

A

HBsAg

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10
Q

Which surface marker is a reliable marker for the presence of high levels of hepatitis B virus (HBV) and a high degree of infectivity?

A

HBeAg

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11
Q

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:

A

Anti-HBc

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12
Q

Which of the following is a characteristic of the delta agent?

A

Usually replicates only in HBV-infected hosts

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13
Q

Which of the following viruses is rarely implicated in transfusion-associated hepatitis?

A

Hepatitis A

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14
Q

In health care workers, the risk of contracting hepatitis C is _______the risk of contracting AIDS.

A

Higher than

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15
Q

The earliest detectable serologic marker of acute hepatitis C is:

A

HCV-RNA

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16
Q

Primary hepatitis viruses are given this name because they primarily attack:

A

The liver

17
Q

Which category has the highest incidence of acute hepatitis C?

A

Dialysis

18
Q

Which category has the lowest incidence of acute hepatitis C?

A

Transfusion

19
Q

The mode of transmission of hepatitis A is:

A

Fecal-oral

20
Q

The mode of transmission of hepatitis B is:

A

Parenteral

21
Q

The mode of transmission of hepatitis C is:

A

Parenteral and nonparenteral

22
Q

The mode of transmission of hepatitis E is:

A

Fecal-oral

23
Q

VCA IgG formation in the following:

No previous exposure:
Recent (acute) infection:
Past infections (convalescent period):
Reactivation of latent infection:

A

No previous exposure: =
Recent (acute) infection: +
Past infections (convalescent period): +
Reactivation of latent infection: +

24
Q

EBNA IgG formation in the following:

No previous exposure:
Recent (acute) infection:
Past infections (convalescent period):
Reactivation of latent infection:

A

No previous exposure: =
Recent (acute) infection: =
Past infections (convalescent period): +
Reactivation of latent infection: +