The actual food source of the bacteria was not found, however investigators "found most of the ill people ate turkey and mashed potatoes and they all ate around the same time. Some dishes served at the event, including cooked turkey, were brought to the site after they were prepared in private homes."
A similar scenario occurred in a 2015 outbreak linked to a Thanksgiving luncheon. In this case, 40 became ill from food contaminated with Clostridium perfrigens. In this case however, food was prepared by a caterer.
Clostridium perfrigens:
- Is a gram positive sporeforming anaerobe.
- Is widely distributed in the environment, but can be found in the intestines of animals and humans (but in small numbers).
- Spores are heat resistant and can survive boiling temperatures. (Dvalues at 100C can range from 0.31min to 17.5min),
- In heat-treated foods that are temperature abused, this organism can divide in as fast as every 10 minutes. (The heat treatment eliminates any competitive flora.) Common food sources include cooked meat foods such as stews and casseroles that are temperature abused.
- Symptoms are caused by ingestion of large numbers ( > 106) vegetative cells or >106 spores/g of food. Toxin production in the digestive tract (or in vitro) is associated with sporulation. This usually occurs about 16 hours after ingestion. As the organism numbers increase, it produces an enterotoxin, and this entertoxin is responsible for the illness
- The primary symptoms are cramping and diarrhea and usually dissipate within 24 hours.
The cooling procedures in the Food Code and Appendix B for USDA are established taking C. perfringens into account.
This event points out the risk of having volunteers prepare food in their own home. In many cases, these people have not been trained in preparing large quantities of food and/or preparing food for events outside of their own home. In the latter, food transportation can be an issue, especially in warmer areas like California.
CBS SF Bay Area News
http://sanfrancisco.cbslocal.com/2016/12/20/common-bacteria-caused-antioch-thanksgiving-dinner-deaths/
Common Bacteria Caused Antioch Thanksgiving Dinner Deaths
December 20, 2016 11:43 AM
ANTIOCH (CBS SF) — A common food-borne bacteria was responsible for three deaths and the illnesses suffered by 22 others following a Thanksgiving meal sponsored by a community church at Antioch’s American Legion auditorium, health officials announced Tuesday.
This event points out the risk of having volunteers prepare food in their own home. In many cases, these people have not been trained in preparing large quantities of food and/or preparing food for events outside of their own home. In the latter, food transportation can be an issue, especially in warmer areas like California.
CBS SF Bay Area News
http://sanfrancisco.cbslocal.com/2016/12/20/common-bacteria-caused-antioch-thanksgiving-dinner-deaths/
Common Bacteria Caused Antioch Thanksgiving Dinner Deaths
December 20, 2016 11:43 AM
ANTIOCH (CBS SF) — A common food-borne bacteria was responsible for three deaths and the illnesses suffered by 22 others following a Thanksgiving meal sponsored by a community church at Antioch’s American Legion auditorium, health officials announced Tuesday.