Skip to Main Content

++

Chapter 37: Reoviruses, Rotaviruses, and Caliciviruses

++
++
++

A 36-year-old man enjoyed a meal of raw oysters. Twenty-four hours later, he became ill, with a sudden onset of vomiting, diarrhea, and headache. The most likely cause of his gastroenteritis is

++
++
++

(A) Astrovirus

++
++

(B) Hepatitis A virus

++
++

(C) Norwalk virus

++
++

(D) Rotavirus, group A

++
++

(E) Echovirus

++
++
++

This virus is the most important cause of gastroenteritis in infants and young children. It causes infections that are often severe and may be life threatening, especially in infants.

++
++
++

(A) Echovirus

++
++

(B) Norwalk virus

++
++

(C) Rotavirus, group A

++
++

(D) Orbivirus

++
++

(E) Parvovirus

++
++
++

An outbreak of epidemic gastroenteritis occurred at a wooded summer camp 24 hours after a party for visiting families. Some of the visiting parents also became ill. Samples taken 2 weeks later from the well that was the source of drinking water at the camp were negative for fecal coliforms. The most likely source of the outbreak was

++
++
++

(A) Mosquitoes or ticks, present in high numbers in the area

++
++

(B) Contaminated food served at the party

++
++

(C) A nearby stream used for fishing

++
++

(D) A visiting parent who was developing pneumonia

++
++

(E) The swimming pool

++
++
++

This viral gastroenteritis agent has a segmented, double-stranded RNA genome and a double-shelled capsid. It is a member of which virus family?

++
++
++

(A) Adenoviridae

++
++

(B) Astroviridae

++
++

(C) Caliciviridae

++
++

(D) Reoviridae

++
++

(E) Coronaviridae

++
++
++

Rotavirus and Norwalk virus are distinctly different viruses. However, they share which one of the following characteristics?

++
++
++

(A) Fecal–oral mode of transmission.

++
++

(B) They mainly cause disease in infants and young children.

++
++

(C) They induce generally mild disease in young children.

++
++

(D) Infection patterns show no seasonal variation.

++
++

(E) A double-stranded RNA genome

++
++
++

Because rotavirus ...

Pop-up div Successfully Displayed

This div only appears when the trigger link is hovered over. Otherwise it is hidden from view.