Question 1

What is the most likely reason why Reston ebolavirus does not cause human disease?

Accepted Answer

A)  The human body temperature prohibits viral replication.
B)  Human tissues lack the appropriate receptors for this viral strain.
C)  Humans have antibodies that prevent establishment of infection with this viral strain.
D)  Human interferons prevent the establishment of infection with this viral.E) B) and C)
F) None of the above

Question 2

A traveler returning to the United.States from India reported having a fever and severe joint pain.She mentioned that the mosquitoes had been particularly troublesome during her trip,and that she had taken the appropriate prophylactic anti-malarial medications.What is a likely cause of her illness?

Accepted Answer

A)  Malaria
B)  Yellow fever
C)  Lyme disease
D)  West Nile virus
E)  Chickungunya feverF) C) and D)
G) B) and E)

Question 3

Women of childbearing age should be vaccinated against _________.

Accepted Answer

A)  chickenpox
B)  German measles
C)  shingles
D)  influenza AE) A) and B)
F) None of the above

Question 4

The rabies virus is transmitted to humans by

Accepted Answer

A)  the bite of an infected animal.
B)  aerosols of the virus that can be present in caves where bats roost.
C)  contamination of scratches with saliva from an infected animal.
D)  All of the choices are correct.E) B) and C)
F) A) and D)

Question 5

The reactivated form of chickenpox is called _________.

Accepted Answer

A)  rubella
B)  adenovirus
C)  herpes zoster
D)  rubeolaE) A) and D)
F) A) and C)

Question 6

Antiviral drugs are frequently used for the treatment of infectious mononucleosis.

Accepted Answer

A) True 
 B)False

Question 7

Antigenic variation occurs almost yearly with the influenza _________ virus.

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) A) and B)
F) A) and C)

Question 8

The leading reason for liver transplantation in the United States is _________.

Accepted Answer

A)  hepatitis C
B)  hepatitis B
C)  hepatitis A
D)  hepatitis DE) B) and D)
F) A) and D)

Question 9

Diagnosis of West Nile virus infection is through detection of

Accepted Answer

A)  viral growth in cell cultures.
B)  a rise in neutralizing antibody in a patient's serum.
C)  PCR analysis from saliva samples.
D)  culture on artificial media.E) C) and D)
F) None of the above

Question 10

Arthropod-borne encephalitis would show less seasonality in a tropical or subtropical climate than what is seen in a temperate climate.

Accepted Answer

A) True 
 B)False

Question 11

The Epstein-Barr virus is the etiologic agent of infectious mononucleosis.

Accepted Answer

A) True 
 B)False

Question 12

The rash associated with German measles is most likely caused by

Accepted Answer

A)  the virus infecting the cells of the skin.
B)  the virus infecting the cells of the dermal layer beneath the skin.
C)  an immunological reaction to the virus.
D)  All of the choices are correct.E) A) and D)
F) None of the above

Question 13

Antigenic variation is common in influenza B and C but is rare in influenza
A.

Accepted Answer

A) True 
 B)False

Question 14

Acute viral gastroenteritis can be caused by the

Accepted Answer

A)  norovirus and the rotavirus group.
B)  cytomegalovirus and hepatitis
C)  the Delta agent.
D)  varicella zoster virus and rubeola virus.E) None of the above
F) All of the above

Question 15

West Nile virus has been detected in _________ states of the United.States.

Accepted Answer

A)  25
B)  50
C)  47
D)  10E) C) and D)
F) None of the above

Question 16

In influenza virus,antigenic shift

Accepted Answer

A)  results from reassortment of genomes when two different strains of flu viruses infect the same cell.
B)  results from the accumulation of mutations in HA and NA in a single strain of flu virus.
C)  can result in major epidemics or pandemics.
D)  results from reassortment of genomes when two different strains of flu viruses infect the same cell and can result in major epidemics or pandemics.E) B) and D)
F) C) and D)

Question 17

Warts or verrucae are caused by the papillomaviruses.

Accepted Answer

A) True 
 B)False

Question 18

Chickenpox is caused by the __________ virus.

Accepted Answer

A)  rubella
B)  rubeola
C)  coxsackievirus B
D)  varicellaE) B) and C)
F) A) and D)

Question 19

In those cases of pneumonia for which no cause is determined by laboratory findings,__________ pneumonia can be assumed if __________ pneumonia has been ruled out.

Accepted Answer

A)  viral; mycoplasmal
B)  bacterial; viral
C)  mycoplasmal; viral
D)  mycoplasmal; bacterialE) A) and D)
F) A) and C)

Question 20

Colds are common because

Accepted Answer

A)  domestic animals serve as a persistent reservoir.
B)  immunity once obtained is not protective.
C)  there is a lack of effective antiviral drugs.
D)  of the antigenic diversity of the rhinoviruses and the lack of long-lasting immunity.E) None of the above
F) C) and D)

Exam 38: Human Diseases Caused by Viruses and Prions

The leading reason for liver transplantation in the United States is _________.

Correct AnswerverifiedShow Answer

Women of childbearing age should be vaccinated against _________.

Correct AnswerverifiedShow Answer

The rash associated with German measles is most likely caused by

Correct AnswerverifiedShow Answer

In those cases of pneumonia for which no cause is determined by laboratory findings,__________ pneumonia can be assumed if __________ pneumonia has been ruled out.

Correct AnswerverifiedShow Answer

Acute viral gastroenteritis can be caused by the

Correct AnswerverifiedShow Answer

Antiviral drugs are frequently used for the treatment of infectious mononucleosis.

Correct AnswerverifiedShow Answer

Chickenpox is caused by the __________ virus.

Correct AnswerverifiedShow Answer

Antigenic variation is common in influenza B and C but is rare in influenza A.

Correct AnswerverifiedShow Answer

Warts or verrucae are caused by the papillomaviruses.

Correct AnswerverifiedShow Answer

The reactivated form of chickenpox is called _________.

Correct AnswerverifiedShow Answer

A traveler returning to the United.States from India reported having a fever and severe joint pain.She mentioned that the mosquitoes had been particularly troublesome during her trip,and that she had taken the appropriate prophylactic anti-malarial medications.What is a likely cause of her illness?

Correct AnswerverifiedShow Answer

The rabies virus is transmitted to humans by

Correct AnswerverifiedShow Answer

Colds are common because

Correct AnswerverifiedShow Answer

What is the most likely reason why Reston ebolavirus does not cause human disease?

Correct AnswerverifiedShow Answer

Arthropod-borne encephalitis would show less seasonality in a tropical or subtropical climate than what is seen in a temperate climate.

Correct AnswerverifiedShow Answer

In influenza virus,antigenic shift

Correct AnswerverifiedShow Answer

West Nile virus has been detected in _________ states of the United.States.

Correct AnswerverifiedShow Answer

The Epstein-Barr virus is the etiologic agent of infectious mononucleosis.

Correct AnswerverifiedShow Answer

Antigenic variation occurs almost yearly with the influenza _________ virus.

Correct AnswerverifiedShow Answer

Diagnosis of West Nile virus infection is through detection of

Correct AnswerverifiedShow Answer

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In those cases of pneumonia for which no cause is determined by laboratory findings, pneumonia can be assumed if pneumonia has been ruled out.

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