One hundred and fifty people attended a charity luncheon in which two different

Question

One hundred and fifty people attended a charity luncheon in which two different menus were served. A total of 76 attendees symptoms including nausea, vomiting abdominal cramps and diarrhea. Most of the 76 patients who became sick reported symptoms about six hours after the beginning of the luncheon. The symptoms lasted from to seven hours. The dishes that were served included: loaf, potatoes and green beans. The table below shows the data collected from this investigation. Round attack rates (%) and RRs to the hundredths. Complete the table above. Calculate the attack rates and relative risk and fill in these columns in the table. Round attack rates and RRs to the hundredths. There were two menus people could choose from (each with a meat and a vegetable). From the RRs you calculate above (#1), list the two food items included in each of the two menus served.

Explanation / Answer

The two menus are

1. Baked chicken and green beans - Culprit of food poisoning

2. Meat loaf and mashed potatoes

Food Item Ate food item Attack rate in % Did not eat food item Attack rate in % Relative Risk Meat loaf 10 74 0.13 Baked chicken 74 10 7.4 Mashed potatoes 9 50 0.18 Green beans 50 9 5.55

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