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Science Olympiad » Disease Detectives Event » Sample Problems and Answer Keys
Answer Key: Gastroenteritis



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Problem

  1. A person who developed gastroenteritis (nausea, vomiting, and/or diarrhea) within 72 hours of the retirement reception.


  2. 112 / 120 = 93%


  3. (112/120) / (15/92) = 0.933/0.163 = 5.7


  4. Norwalk virus/Norwalk-like virus. The points may include incubation period, symptoms, and average duration of illness.


    The average incubation period and the duration of symptoms for this outbreak fits in the range provided by the table. The symptoms for this outbreak also match. The incubation period rules out staph food poisoning, C. perfringens, and E. coli O157:H7. The duration of symptoms and relative absence of vomiting rules out Salmonella.


  5. D


  6. Incidence


  7. Pandemic


  8. Median


  9. Endemic

Tiebreaker #1

  1. E
  2. D
  3. A
  4. B
  5. C

Tiebreaker #2

Answer = B





This page last reviewed April 24, 2007

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