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A 9-month-old infant is brought to the Health Department to receive the second dose of OPV (oral polio vaccine) 2 weeks after the first vaccination. The child has mild diarrhea, so the decision is made to defer further immunizations. Bacteriologic examination of a stool culture is unremarkable; however, a small, single-stranded, positive RNA virus is isolated from the specimen. This same agent was isolated from sewage effluent the preceding week. The viral isolate was not inactivated by ether. Which of the following viruses was most likely isolated?

A. Adenovirus
B. Hepatitis C
C. Parvovirus B19
D. Poliovirus
E. Rotavirus
 

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by elimination this only leaves us with either Hep C virus or Polio virus. Hep C is encapsulated whereas Poliovirus (picornavirus) is not. so if there's no capsule it cannot be destroyed by ether.

so my answer is poliovirus. any other thoughts?
 
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