A total of 1,097 foodborne disease outbreaks were reported in 2007 to the Centers for Disease Control and Prevention, according to a CDC analysis. State investigators reported 21,244 illnesses and 18 deaths as a result of these outbreaks. The report also provides the most recent data on how many illnesses were linked to specific types of foods.
“Knowing more about what types of foods and foodborne agents have caused outbreaks can help guide public health and the food industry in developing measures to effectively control and prevent infections and help people stay healthy,” said Chris Braden, acting director of the CDC’s Division of Foodborne, Waterborne and Environmental Diseases.
Despite health officials’ efforts, the cause of an outbreak—either the food or the foodborne agent responsible—often cannot be determined or confirmed. This most commonly is the case when the outbreak is small. In more than half of the outbreaks, a foodborne agent was not identified. Norovirus was the most frequently confirmed foodborne agent (39 percent), followed by Salmonella (27 percent).
Foodborne disease outbreaks due to norovirus occur most often when infected food handlers do not wash their hands well after using the toilet; outbreaks due to salmonella occur most often when foods are contaminated with animal feces. Contaminated foods are often of animal origin, such as beef, poultry, milk, or eggs. But any food, including vegetables, may become contaminated. Thorough cooking kills Salmonella.
The report states that in the 235 outbreaks where one food commodity was identified, the largest number of illnesses listed poultry (691 illnesses), beef (667 illnesses), and leafy vegetables (590 illnesses) as the cause. The CDC tracks 17 food commodity categories. A full listing of the number of illnesses associated with each of the categories is available at: www.cdc.gov/outbreaknet/surveillance_data.html.
To prevent foodborne illnesses, CDC recommends that consumers and food handlers appropriately clean, separate, cook and chill foods. For more details, visit www.foodsafety.gov.
From the report:
Foodborne agents cause an estimated 76 million illnesses annually in the United States. Outbreak surveillance provides insights into the causes of foodborne illness, types of implicated foods, and settings of foodborne infections that can be used in food safety strategies to prevent and control foodborne disease. CDC collects data on foodborne disease outbreaks submitted from all states and territories. This report summarizes epidemiologic data for the 1,097 reported outbreaks occurring during 2007 (the most recent finalized data), which resulted in 21,244 cases of foodborne illness and 18 deaths. Among the 497 foodborne outbreaks with a laboratory-confirmed single etiologic agent reported, norovirus was the most common cause, followed by Salmonella. Among the 18 reported deaths, 11 were attributed to bacterial etiologies (five Salmonella, three Listeria monocytogenes, two Escherichia coli O157:H7, and one Clostridium botulinum), two to viral etiologies (norovirus), and one to a chemical (mushroom toxin). Four deaths occurred in outbreaks with unknown etiologies. Among the 235 outbreaks attributed to a single food commodity, poultry (17%), beef (16%), and leafy vegetables (14%) were most often the cause of illness.
The CDC press release is here
The CDC report is here