Solve an Outbreak! Activity Questions

Solve an Outbreak! Activity Questions

After completing the “Case of the Conference Blues” and “Deadlier than War” mysteries online, answer the following questions in this document. You will submit it as an assignment for Module 7. Remember to save this document to your computer first, then complete the questions. Point values for each question of this activity are provided.

“Case of the Conference Blues”

  1. What was the infectious disease agent involved in this outbreak? (1 point)
  2. What is the means of transmission of the infectious disease agent in this case study (i.e direct or indirect)? If the means of transmission is indirect, specify if the infection is vehicle-borne, airborne, or vector-borne. (2 points)
  3. When did the number of cases peak? (Make sure to use the epi-curve provided in Clue 2) (1 point)
  4. Although the attack rate for the spinach dip is higher than that of the veggie lasagna, why can you not conclude that the spinach dip is the source of the outbreak? (1-2 sentences) (3 points)
  5. In Clue 2, relative risks for getting sick by each food item were calculated. Create the 2*2 table for calculating the relative risk of illness as a result of eating the spinach dip using the information provided in the clue.  (5 points)

Extra credit: calculate the relative risk for eating spinach dip. Show your work. (2 extra points)

 

Ill

Not ill

Total

Ate spinach dip

 

 

 

Did not eat spinach dip

 

 

 

Total

 

 

 

“Deadlier than War” 

  1. What was the infectious disease agent involved in this outbreak? (1 point)
  2. What are the means of transmission of the infectious disease agent in this case study (i.e direct or indirect)? If the means of transmission is indirect, specify if the infection is vehicle-borne, airborne, or vector-borne.  (2 points)
  3. When did the number of cases peak? (Make sure to use the epi-curve provided in Clue 1) (1 point)
  4. Calculate the attack rate for the conference attendees who: 1) stayed at, 2) visited, or 3) did not visit the hotel during the days of interest using the made-up numbers below. (3 points)

Conference attendees

# ill

# well

Attack rate

Stayed at the hotel

50

5

 

Visited the hotel

45

25

 

Did not visit the hotel

5

55