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Exam 24: Pathogenic Dna Viruses

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Question 21

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Reactivation of latent in immunosuppressed individuals may result in disease of the brain known as progressive multifocal leukoencephalopathy (PLM) .

A) HHV- 6
B) B19 virus
C) JC virus
D) HHV- 8
E) BK virus

F) A) and E)
G) B) and C)

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Question 22

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Skin lesions described as "dewdrops on rose petals" are characteristic of (chickenpox/shingles).

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Question 23

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Which of the following statements is true of both molluscum contagiosum and smallpox?

A patient is brought into the ER in a coma. Upon inspection, the physician sees evidence of many new tattoos, as well as yellowing of the skin and eyes. What is the most likely cause of the patient's condition?

The large size of poxviruses allows them to

Adenoviruses are so named because they infect only adenoid cells in humans.

Erythema infectiosum is a dangerous but treatable disease.

Hepatitis B virus replicates in liver cells and is released by (exocytosis/lysis), which contributes to the infection becoming chronic.

A scientist discovers a new virus that causes mild respiratory disease in humans. He is able to isolate, purify, and characterize the virus. The virus preparation contains double- stranded DNA and no lipid. To which of the following virus families does this new virus likely belong?

Individuals who have had chickenpox may develop (cancer/shingles/whitlows) later in life if they experience severe stress or immune suppression.

For protection from infection with genital herpes, condoms need to be used only when there is an active lesion.

Which of the following characteristics are common to Poxviridae, Herpesviridae, and Hepadnaviridae?

Which among the following are the largest DNA viruses that infect humans?

Nearly everyone appears to be infected with polyomaviruses BK and JC by the age of 15.

In infections with human herpesvirus (1/2/3/4), the virus becomes latent in B lymphocytes and suppresses apoptosis, thus providing one source of lymphomas associated with this virus.

Human herpesvirus 4 (EBV) has been implicated as an etiological agent in some cases of Hodgkin's lymphoma.

A young man goes to a clinic complaining of discomfort in his foot, especially when standing. Upon examination, the clinician observes raised bumps with rough surfaces on the sole of his foot. These lesions are consistent with

Which of the following increases the risk of permanent liver damage with hepatitis B infection?

Infection of the respiratory system by may develop into symptoms of a common cold.

As the name implies, polyomaviruses are common causes of viral cancers in humans.