BMS 127 Ch. 24 Pathogenic DNA Viruses Flashcards
For which of the following reasons are most animal poxviruses unable to infect humans?
a. Affected animals are not in frequent contact with humans.
b. The human immune system makes it impossible for the foreign viral particles to reproduce effectively.
c. Attachment to human cells in unlikely.
d. Human cells lack the necessary enzymes for infection.
c. Attachment to human cells in unlikely.
DNA viruses in which family are relatively large and thus potentially well suited for vaccinations and the introduction of genetic material in gene therapy?
Poxviridae
What are the initial flat, red skin lesions of poxviruses called?
macules
Which of the following statements is true concerning variola major?
a. It carries a mortality rate of less than 1%.
b. It affects internal organs before appearing on the skin.
c. It has been totally eradicated from the Earth.
d. The skin lesions it causes are smooth, waxy, tumor-like nodules on the face.
b. It affects internal organs before appearing on the skin.
Which of the following herpesvirus infections would be potentially most serious?
a. a whitlow
b. ocular herpes
c. shingles
d. cytomegalovirus in fetuses
d. cytomegalovirus in fetuses
A man experienced a laboratory accident in which he was infected with adenovirus. What signs and symptoms might he exhibit?
a. fever
b. headache
c. cough
d. pinkeye
e. all of the above
e. all of the above
Which of the following is a n inflammatory condition of the liver?
a. fifth disease
b. PML
c. seed warts
d. hepatitis
d. hepatitis
Which of the following statements is false?
a. B19 virus is the primary parvovirus of humans.
b. Erythema infectiosum is caused by parvovirus
c. In children, parvovirus infections are accompanied by a high mortality rate.
d. Parvovirus infection in humans results in infectious reddening of the skin.
c. In children, parvovirus infections are accompanied by a high mortality rate.
A distinguishing feature of a poxvirus is
a. its large size
b. a polyhedral capsid
c. the type of RNA it contains
d. the production of several types of warts
a. its large size
Monkeypox has been diagnosed in several humans in Zaire. What might be recommended to prevent further risk of infection?
a. Catch the monkeys for inoculation with monkeypox vaccine and then release them.
b. Remove infected tissues from humans with chemicals, by surgery, or by freezing.
c. Reinstate smallpox vaccinations for the population of Zaire.
d. The diagnosis must have been incorrect, because humans are unaffected by monkeypox.
c. Reinstate smallpox vaccinations for the population of Zaire.
Which of the following viral families is most likely to contain viruses that exist in a latent state in humans?
a. Herpesviridae
b. Poxviridae
c. Adenoviridae
d. Parvoviridae
a. Herpesviridae
If the envelope of a particular virus were unstable outside the host’s body, which of the following statements would you expect to be true concerning this virus?
a. It would be a dsDNA virus.
b. It would be transmitted by intimate contact.
c. Touching a doorknob would easily transmit it.
d. That virus would eventually cease to be a threat to the population.
b. It would be transmitted by intimate contact.
Being habitually careful not to touch or rub your eyes with unwashed hands would reduce your risk of contracting
a. chickenpox
b. infectious mononucleosis
c. seed warts
d. a cold
d. a cold
Human herpesvirus 2
a. can cause genital herpes
b. may infect a baby at birth
c. causes about 10% of cold sores.
d. all of the above.
d. all of the above.
Which of the following viruses is latent and can reactive to cause further disease?
a. herpesvirus
b. papillomavirus
c. adenovirus
d. parvovirus
a. herpesvirus
