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07:24Which of the following statements is false?
a. B19 virus is the primary parvovirus of humans.
b. Erythema infectiosum is caused by a 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.
A man experienced a laboratory accident in which he was infected with adenovirus. What signs or symptoms might he exhibit?
a. Sore throat
b. Headache
c. Pinkeye
d. All of the above
Which of the following herpesvirus infections would be potentially most serious?
a. A whitlow
b. Ocular herpes
c. Shingles
d. Cytomegalovirus in a fetus
Monkeypox has been diagnosed in several humans in the Democratic Republic of the Congo. What might be recommended to prevent further risk of infection?
a. Catch the monkeys for inoculation with monkeypox vaccine.
b. Remove infected tissues from humans with chemicals, by surgery, or by freezing.
c. Reinstate smallpox vaccinations for the country's population.
d. The diagnosis must have been incorrect because humans are unaffected by
monkeypox.
A distinguishing feature of 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
Most of the world’s population in less developed and developing countries have been infected with EBV human herpesvirus 4 by age one and show no ill effects, even where medical care is poor. In contrast, individuals in industrialized countries are ordinarily infected after puberty, and these older patients tend to have more severe reactions to infection despite better overall health and access to medical care. Explain this apparent paradox.
