E. coli and STEC
E. coli is a bacterium that normally lives in the intestines of healthy people and animals. Fortunately most strains of E. coli are harmless and don’t cause symptoms. But there are certain strains that can lead to symptoms such as abdominal cramping, diarrhea, fever and vomiting. In some cases a severe infection can even result in kidney failure.
STEC is one strain that can cause gastrointestinal symptoms. It’s called “shiga toxin-producing” because the toxin from this strain of E. coli is very similar to that produced by the Shigella bacterium.
How common is it?
One estimate suggests at least 2.8 million STEC infections occur globally every year.
Why are bagged salads often a culprit?
Contamination in bagged salads can occur at various stages, from farm to table. It can begin early during growing when leafy greens can be exposed to bacteria from contaminated water, soil or manure. During harvesting, handling and processing, cross-contamination can happen if the equipment or surfaces are not properly disinfected. Finally, packaging can contribute to contamination if it comes into contact with contaminated surfaces or hands.
The current outbreak
Health authorities sometimes test for the presence of food-borne bacteria by culturing bacteria from packaged foods in the lab as part of a proactive public health surveillance program. If they identify the presence of concerning food-borne bacteria they will work with retailers to undertake recalls of that food product as a precaution to protect public health.
Washed and ready to eat?
Many bagged salad products come with a selling point along the lines of “washed and ready to eat”. Given the current recalls, you might ask whether it really is safe to eat pre-packaged salads without giving the leaves a wash yourself.
Conclusion
The current recalls are not the first time bagged salads have been subject to food safety issues in Australia or elsewhere. As consumers, it is essential to be aware of the risks and take steps to minimize them. Regularly checking the use-by dates of bagged salad products, washing your hands before handling food, and paying attention to health alerts are all crucial in preventing foodborne illness.
FAQs
Q: What is E. coli?
A: E. coli is a bacterium that normally lives in the intestines of healthy people and animals.
Q: What is STEC?
A: STEC is a strain of E. coli that can cause gastrointestinal symptoms.
Q: How common is STEC infection?
A: At least 2.8 million STEC infections occur globally every year.
Q: Why are bagged salads often a culprit?
A: Contamination in bagged salads can occur at various stages, from farm to table, due to factors such as contaminated water, soil or manure, poor handling and processing, and inadequate packaging.
Q: What can I do to minimize the risk of foodborne illness?
A: Regularly check the use-by dates of bagged salad products, wash your hands before handling food, and pay attention to health alerts.
