The food specific attack rate for egg salad amongst the individuals who actually consumed this menu item for dinner was 35.71. This was the highest estimated food specific attack rate amongst the eight menu options that were consumed by the patients and staff of the Bluegrass Hospital. It appears based on the figures that the food item that was most likely the cause of the common source outbreak is egg salad.
An incubation period is the period of time between when the individual is exposed to the illness to the onset of the individuals experiencing clinical symptoms of illness (Daniels 2002). According to Daniels (2002), in order to determine the incubation period, the peak period of the outbreak must be know. The peak period is the time period where the most number of cases of the illness occurred. The incubation period for the outbreak at the Bluegrass Hospital is 1 to 3 hours.
According to the CDC, food borne illnesses develops from bacteria, viruses and parasites that develops in food items due to improper food handling. Eggs is one of the most common foods that becomes contaminated. The outbreak in the Bluegrass Hospital occurred when patients and staff were served food items containing the egg products that was contaminated with