An FBDO is defined as the occurrenc

An FBDO is defined as the occurrence of two or more
cases of a similar illness resulting from a common food
[7]. The causal pathogen is confirmed by standard laboratory
confirmative criteria. If the laboratory results do
not meet the confirmative criteria, the causal pathogen is
suspected by reasonable assessment of the relevant
epidemiological investigations such as checking incubation
period [10,11]. The causal vehicle is confirmed
when the same microorganism is isolated from the vehicles
and illnesses. If the microorganism is not isolated
from the illnesses, the causal vehicles are suspected by
the results of statistical analysis or the laboratory results
of the vehicles with an appropriate incubation period.