Foodborne Bacteria: Understanding Them to Better Combat Them in the Food Industry
Foodborne bacteria pose a serious threat to food safety, affecting both product quality and consumer health.
In this article, we’ll introduce you to the main bacteria responsible for contamination in the food industry (Salmonella, Listeria, etc.) and explain what preventive measures can be implemented to avoid them: hygiene measures, as well as an effective, continuous air treatment solution.
What is microbiological contamination?
Microbiological contamination refers to the invasion of an environment by harmful microorganisms such as bacteria, viruses, and molds. These pathogens, which are present in the air, on surfaces, or in water, can multiply rapidly and form biofilms. Their microscopic size allows them to remain suspended in the air, posing a constant risk to food safety.
The meat, deli, dairy, and bakery sectors are particularly vulnerable to such contamination, which can lead to costly product recalls and harm both companies’ reputations and consumers’ health.
Major Pathogens: A Focus on Salmonella and Listeria
Salmonella and Listeria monocytogenes are among the most concerning bacteria in the food industry.
Salmonella
Salmonella is often associated with foods of animal origin (dairy products, including chocolate, eggs, etc.) and can cause salmonellosis, while Listeria is dangerous even at low temperatures and causes listeriosis, which is particularly risky for people with weakened immune systems.
Salmonellosis causes diarrhea of varying severity and primarily affects children and the elderly. Salmonella bacteria are found in the digestive tracts of infected animals, as well as in humans who have ingested contaminated food. They can also contaminate raw fruits and vegetables if these have been exposed to them. Just a few bacteria can be enough to contaminate food, which is why it is important to control the risk of cross-contamination.
Listeria
Listeria, on the other hand, is unique in that it can multiply and grow inside the cells of an infected person. While infections are often asymptomatic, a small number can lead to listeriosis, which primarily affects the elderly and immunocompromised individuals and can have serious consequences. There are an average of 400 cases per year in France.
Finally, another bacterium frequently responsible for foodborne illness is E. coli (Escherichia coli), which is found not only in the digestive tract of farm animals, as well as in humans, which facilitates contamination through the consumption of contaminated meat or dairy products, or raw fruits and vegetables that have come into contact with these strains. While most of these strains are harmless, some can be pathogenic.
Identifying and controlling these bacteria is therefore crucial to preventing foodborne illnesses and ensuring consumer safety.
How can airborne contamination be prevented in the food industry?
Controlling airborne contamination is essential for combating foodborne bacteria and maintaining a safe production environment. This includes rigorous hygiene practices, regular surface cleaning, and continuous air treatment.
Innovative technologies such as the solution offered by PhotoClean—which uses UV-C rays in combination with a medium we developed and patented to process large volumes—are both effective and cost-efficient.
Our decontamination modules directly target microbiological contaminants rather than fine particles (which are 1,000 times more numerous), making them far more energy-efficient than traditional filtration systems, which also have the drawback of being much larger in size. PhotoClean designs a customized solution for your facilities following a comprehensive audit by our engineering department. We provide you with custom-built modules for seamless integration, as well as a layout plan to facilitate installation. This way, you can prevent cross-contamination while adhering to the specific production requirements of each area in your facilities.