Infectious mononucleosis , a viral disorder that can be debilitating, is characterized by which of the following statements ?
A. It is most prevalent in children less than 14 years old
B. It is caused by a rhabdovirus
C. The causative pathogen is an Epstein-barr vimus
D. Affected persons respond to treatment with the production of heterophil antibodies
E. Ribavirin is the treatment of choice
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A 19-year-old female college student has a fever, sore throat, and lymphadenopathy accompanied by lymphocytosis with atypical cells and an increase in sheep cell agglutinins. The diagnosis is most likely
A. Infectious hepatitis
B. Infectious mononucleosis
Chickenpox
D. Herpes simplex infection
E. Viral meningitis
The most common congenital infection is caused by
A. Varicella-zoster virus
B. Herpes simplex virus type 2
C. Human herpesvirus 8(Kaposi sarcoma herpesvirus)
D. Cytomegalovirus
E. Parvovirus
Which one of the following is the best explanation for the selective action of acyclovir (acycloguanosine) in herpes simplex virus-infected cells ?
Acyclovir binds specifically to viral receptors only on the surface of the HSV-infected cell
B. Acyclovir is phosphorylated by a virus-encoded phosphokinase only within HSV-infected cells
C. Acyclovir selectively inhibits the RNA polymerase in theHSV virion
D. Acyclovir specifically blocks the matrix protein of HSV, thereby preventing release of progeny HSV
The serum of a newborn infant reveals a 1:32 CMV titer. The child is clinically asymptomatic. Which of the following courses of action would be advisable?
A. Repeat the CMV titer immediately
B. Wait 6 months and obtain another titer on the baby
C. Obtain a CMV titer from all siblings
D. Obtain an anti-CMV IgM titer from the mother
E. Obtain an anti-CMV IgM titer from the baby
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