Foodborne Illness Misidentified as the 24-hour Stomach Bug: Bacillus cereus
**Subtitle: Keeping Your Meals Safe from a Common Culprit**
Bacillus cereus, a spore-forming bacterium found in soil, dust, and raw food ingredients, is a common cause of foodborne illness. This bacterium is particularly associated with rice and rice dishes, such as fried rice, due to the handling practices often involved in rice preparation. If cooked rice is left at room temperature for extended periods, any surviving spores can germinate, grow, and produce toxins, leading to illness when the rice is consumed, especially when reheated inadequately.
However, this bacterium is not limited to rice. Many foods have been implicated in outbreaks of foodborne illness caused by Bacillus cereus, including meats, stews, gravies, edible insects, vegetables, fish, starchy foods like potatoes, pastas, sauces, puddings, soups, casseroles, and pastries.
To minimize the risk of Bacillus cereus foodborne illness, proper temperature control, rapid cooling, adequate reheating, good hygiene practices, and avoiding prolonged storage are key prevention strategies.
- Proper Temperature Control: Keep hot foods at or above 57°C (135°F) and cold foods at or below 5°C (41°F). Avoid holding food in the "danger zone" (5–57°C) for extended periods, as this allows bacterial multiplication. - Rapid Cooling: Cool cooked rice quickly after preparation and refrigerate it promptly. Ideally, divide large batches into smaller, shallow containers to facilitate faster cooling. - Adequate Reheating: Reheat rice and other cooked foods thoroughly until steaming hot throughout, as heat destroys vegetative cells but not the heat-resistant spores. - Good Hygiene Practices: Practice handwashing and maintain clean food preparation surfaces to avoid cross-contamination. - Avoid Prolonged Storage: Discard cooked foods that have been left at room temperature for more than 2 hours (1 hour if the ambient temperature is above 32°C/90°F).
Bacillus cereus causes two forms of illness: the emetic (vomiting) type, typically associated with carbohydrate-rich foods like rice, and the diarrheal type, linked to protein-containing foods (meats, stews, gravies). The onset of the emetic type is 1–5 hours after ingestion, while the diarrheal type begins 8–16 hours after ingestion. Most people recover without medical treatment, and about 20 cases will be severe enough to require hospitalization, but no deaths are predicted to result from this mild foodborne illness.
In summary, Bacillus cereus is best controlled by rapid and thorough cooling of cooked foods, strict temperature control, good hygiene, and avoiding prolonged storage at unsafe temperatures, especially for rice dishes. For more information about food safety, visit Foodsafety.osu.edu.
- Consuming food-and-drink items that have been prepared by the 4-h organization should follow the guidelines for preserving food safety, especially for dishes that involve rice, as they are often associated with Bacillus cereus outbreaks.
- Being aware of the health-and-wellness aspect of food safety is crucial when preparing meals, as neglecting proper handling can lead to Bacillus cereus foodborne illness in various types of food, like meats, vegetables, and fish.
- To maintain a desirable lifestyle that promotes health and wellness, it's essential to pay attention to nutrition and food safety, as failure to cool and store rice promptly can result in the growth of Bacillus cereus, potentially causing illness.
- General-news sources often report on the importance of practicing science in cooking, as understanding the role of Bacillus cereus in foodborne illness can help individuals make informed decisions about food-and-drink choices and cooking practices, ultimately ensuring their health and well-being.
