You are in charge of the investigation regarding possible ex

You are in charge of the investigation regarding possible exposure to Listeria from packaged salad. Read the following and hen answer the questions: On January 27, Dole voluntarily recalled all salad mixes produced in the Springfield, Ohio processing facility. A list of the recalled brands and types of salad mixes, states where they were sold, and instructions on how to identify them are available on the Advice to Consumers pace. Three more ill people have been reported from Connecticut, Missouri, and New York. The most recent illness was diagnosed on January 3, 2016. According to the Public Health Agency of Canada, there are seven people in five Canadian provinces infected with the same outbreak strain of Listeria. First of all, complete the epidemiological triangle for this exposure. Can it be Listeria? Explain. Second, develop a specific case definition for this exposure and then clearly state how you would define a Confirmed case, Probable case, Possible Case and Suspect case. Lastly, how would you gather information regarding the number and location of cases associated with this exposure?

Solution

A. Agent - Microorganism (Listeria monocytogenes) capable of causing disease.

Host - Human consuming a packaged food.

Environment - Improperly processed salad.

Yes. The Listeria is a food borne disease. When the foods are contaminated or not processed properly
causes the diseases. No other way the disease is going to cause.

B. From december 30 to januray 31 all the cases of listeria are taken in to account in the region of USA and Canada. The symptoms for Listeria infection are Fever, nausea diarrhea, loss of balance etc.

suspect - It support clinical case definition and the persons the common signs and symptoms for the
disease. It is the initial stage for reporting purpose.

Probable case - It support clinical case definition and the persons have all the symptoms for disease and
sent the sample for diagnosis.

possible case - It have some of the clinical features. It is same as suspect case.

Confirmed cases - it is based on laboratory confirmation. Patient blood are taken and cultured in laboratory and
gets confirmation.

C. From ohio processing facility where ever they sent the particular batch contaminated product are taken
into account. From case definition the location and number of persons affected by the disease are calculated.