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Chapter 38: Arthropod-Borne and Rodent-Borne Viral Diseases

A 74-year-old man develops fever, malaise, and a sore throat ­followed shortly thereafter by nausea, vomiting, and then ­stupor. Eastern equine encephalitis is diagnosed. Control of this disease in humans could be accomplished by eradication of which of the following?

(A) Horses

(B) Birds

(C) Sandflies

(D) Mosquitoes

(E) Ticks

An arbovirus common in the Middle East, Africa, and Southwest Asia first appeared in New York in 1999. By 2002 the virus had spread throughout the continental United States. This arbovirus, a member of the Japanese B encephalitis antigenic complex, is which of the following?

(A) Japanese B encephalitis virus

(B) Tick-borne encephalitis virus

(C) West Nile virus

(D) Dengue virus

(E) Rift Valley fever virus

Which of the following descriptions of or statements about Lassa fever is correct?

(A) It is found in eastern Africa.

(B) Human-to-human transmission does not occur.

(C) It seldom causes death or complications.

(D) It occurs from contact with the house rat Mastomys natalensis.

(E) There is no drug that is effective in treating Lassa fever.

Arboviruses are transmitted by bloodsucking arthropods from one vertebrate host to another. Arboviruses are found in the ­following virus families except which of the following?

(A) Togaviridae

(B) Flaviviridae

(C) Bunyaviridae

(D) Reoviridae

(E) Arenaviridae

A 27-year-old man develops fever, chills, headache, and backache. Four days later he develops a high fever and jaundice. Yellow fever is diagnosed. Which of the following statements concerning yellow fever is correct?

(A) The virus is transmitted by culicine mosquitoes in the urban form of disease.

(B) Monkeys in the jungle are a major reservoir of yellow fever virus.

(C) Yellow fever often has long-term complications.

(D) All infections lead to apparent disease.


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