Among all of the bacteria that may be present in your food supply, Listeria monocytogenes has the highest rate of contamination. There are a few different types, including Salmonella and Staph. aureus, but they all cause some sort of damage to the food industry. Here is a look at some of the most common types. Read on to learn more. In addition to listeria, Clostridium perfringens is another dangerous foodborne pathogen.

Listeria monocytogenes

Despite numerous precautionary measures, a bacterium called Listeria monocytogenes is the culprit in countless outbreaks. Among these is a lack of proper food hygiene, which has allowed the bacterium to grow and cause a variety of diseases including listeriosis. The bacterium is a psychrotroph and can survive in various food preservation systems, including the RTE process. As a result, outbreaks of Listeria are most likely to occur in small to medium-sized enterprises, because of differences in food safety practices. A global outbreak of Listeria occurred in 2014 and 2017, and a plethora of cases of listeriosis have been documented.

The bacteria that causes listeriosis is found in a wide range of foods, including dairy products, fresh and frozen meat, sprouts, and unpasteurized milk. Although only a small amount of Listeria is likely to be found in foods, small amounts can cause serious illness and even death in some individuals. This is why it is so important to check labels carefully when purchasing any type of food, as it is possible to accidentally eat contaminated foods without knowing it.

Staph. aureus

Staphylococcus aureus is a Gram-positive, catalase-positive bacterium that lives in soil and food. When viewed microscopically, the organism forms clusters of cells that have the appearance of ‘bunches of grapes.’ It has a wide temperature range and is particularly resistant to desiccation. Although this bacterium is commonly found in low-concentration levels, it can also survive on products that have been vacuum-packed.

When contaminated foods are consumed, people may experience severe symptoms including abdominal pain, diarrhea, and vomiting. The toxins produced by the staphylococcus are highly heat resistant and highly resistant to environmental conditions. These traits pose a severe threat to the food industry. These strains have the ability to persist in food for long periods of time and are often resistant to refrigeration, freezing, and low pH levels.

Staphylococcus aureus is a persistent colonizer of the nares of about 20 percent of humans. It has numerous surface and secreted proteins that promote adhesion to tissue components and invasion into host cells. In addition, it produces extracellular enzymes and zymogen activators, which cause infection and contribute to immune evasion. It can also interfere with the complement system and inhibit neutrophil migration.

Clostridium perfringens

Clostridium perfringens is a common pathogenic bacteria in the food industry. It has several different toxigenic strains. Type A is associated with the disease gangrene. Type C is sometimes associated with the disease wound infections. While the majority of C. perfringens cases result from improper cooking of meats, contaminated meats can be the cause of severe illness.

Outbreaks of C. perfringens occur frequently and can be extremely deadly. There are several ways to prevent these outbreaks from occurring in the first place. Proper handling and preparation of raw foods will help reduce the risk of contamination. Once the contamination is identified, proper sanitation practices and sanitary conditions can help prevent the spread of C. perfringens in food.

Outbreaks occur on a yearly basis and can occur at any time of year. Outbreaks occur in a variety of food preparation facilities. Among the most common settings are restaurants, prisons, and private homes. The most common types of food contaminated with C. perfringens are beef and poultry, which account for 92% of foodborne illnesses.


The most common way in which Salmonella enters the food chain is when it is present on raw or undercooked meat. Because the bacteria live in the intestines of animals and humans, they can pass from animal to human through contact with their feces. Additionally, the bacteria can be transferred to the food supply from worker clothing, hands, and soil. Fortunately, there are several steps to minimize the risks of Salmonella contamination in the fruit and vegetable industry.

The most common bacteria responsible for illnesses caused by Salmonella are the invasive non-typhoidal strains, which cause acute diarrhoea, which are the leading cause of illness in children. According to the World Health Organization’s Foodborne Disease Burden Epidemiology Reference Group, Salmonella caused 180M illnesses in 2010 and resulted in 298 496 deaths. The CDC and the USDA work together on the FoodNet program, a collaborative effort involving the USDA and the U.S. Food and Drug Administration to measure the health risks associated with Salmonella bacteria in food.