Surveillance For Foodborne Disease Outbreaks
An estimated 76 million cases of foodborne illnesses occur annually in the United States. This report summarizes the 2007 data for the 1,097 reported outbreaks which were responsible for 21,244 cases of foodborne illnesses and 18 deaths during the year.
The CDC defines a foodborne outbreak as two or more similar illnesses resulting from consumption of a common food. In 2007, the total number of foodborne outbreaks reported decreased by 8% compared with the average number from 2002 to 2006; the total number of illnesses also decreased by 15%.
Of the 497 outbreaks caused by a single etiologic agent, bacteria caused 52%, viruses caused 40%, chemical agents caused 7%, and parasites caused 1%.
A single food commodity was linked to 235 outbreaks with 4,119 illnesses. These outbreaks were most commonly associated with fin fish (41), poultry (40), and beef (33). Illnesses were most frequently associated with poultry (691), beef (661), and leafy vegetables (590).

