Brian Barton
Foodborne illnesses, also known as foodborne diseases or food poisoning, are caused by contaminated food. This contamination can be caused by pathogenic bacteria, viruses, parasites, prions, or toxins. Foodborne illnesses can be caused by improper handling, preparation, or food storage. Contaminated food can cause mild to severe illnesses and even contribute to the development of serious health problems such as hormonal and metabolic issues, nervous system problems, or even cancer. Foodborne illnesses disproportionately affect infants, young children, the elderly, pregnant people, and those who are immunocompromised or sick. Examples of foodborne illnesses include Salmonella, Campylobacteriosis, Listeria, Vibrio cholerae, and Toxoplasma gondii infections.
| Characteristics | Values |
|---|---|
| Type of disease | Foodborne diseases, Food poisoning, Foodborne illness |
| Cause | Food contamination, Environmental contamination, Unsafe food storage, Food processing |
| Contaminants | Bacteria, Viruses, Parasites, Prions, Toxins, Pollutants, Heavy metals, Radioactive nucleotides, Pesticides, Medicines, Natural toxic substances |
| Symptoms | Diarrhea, Vomiting, Fever, Aches, Abdominal pain, Kidney damage, Brain and neural disorders, Reactive arthritis, Cancer, Death |
| Risk factors | Children, Elderly, Pregnant women, Immunocompromised individuals, Prior exposure |
| Prevention | Good hygiene practices, Regular hand-washing, Safe food production, processing, handling and consumption |
| Examples | Campylobacteriosis, Salmonella infections, Listeria, Vibrio cholerae, Bovine spongiform encephalopathy (Mad cow disease), Shigellosis |
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What You'll Learn
Foodborne diseases caused by bacteria, viruses, and parasites
Foodborne illnesses are usually infectious or toxic and are caused by bacteria, viruses, parasites, or chemical substances entering the body through contaminated food. Here are some examples of foodborne diseases caused by bacteria, viruses, and parasites:
Bacteria
Foodborne illnesses caused by bacteria include Bacillus cereus, botulism, hepatitis A, Shigella, and Staphylococcus aureus (Staph Food Poisoning). Bacteria are the most common cause of food poisoning, and the symptoms and severity of the illness vary depending on the specific bacteria that has contaminated the food. For example, Staphylococcus aureus can cause nausea, vomiting, and abdominal cramping within a few hours to days after consuming contaminated food.
Viruses
Viruses can also cause foodborne illnesses, such as norovirus and sapovirus, which are commonly associated with foodborne outbreaks. Hepatitis A is another virus that can be transmitted through contaminated food and water, causing fever, fatigue, and jaundice.
Parasites
Parasites are organisms that derive nourishment and protection from their hosts. Some parasites are transmitted through food, such as Taenia saginata (beef tapeworm) and Taenia solium (pork tapeworm), which are parasitic worms. Giardia duodenalis is another parasite that can cause foodborne illness, especially through the consumption of uncooked or contaminated meat. Fish-borne trematodes are parasites transmitted through the consumption of raw or undercooked fish.
It is important to note that foodborne illnesses can have varying symptoms and severity, and some may require immediate medical attention. Proper food handling, storage, and cooking practices are crucial to prevent the spread of foodborne diseases caused by bacteria, viruses, and parasites.
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Foodborne illnesses and their symptoms
Foodborne illnesses, also known as food poisoning, are caused by contaminated food. This contamination can be caused by pathogenic bacteria, viruses, parasites, prions, toxins, or chemicals. Foodborne illnesses can be caused by improper handling, preparation, or food storage. Food that has been touched by a person who is ill with vomiting or diarrhea can become contaminated and cause foodborne illness in those who consume it.
Foodborne illnesses can have a range of symptoms, including vomiting, fever, aches, and diarrhea. In some cases, foodborne illnesses can cause repeated bouts of vomiting with extended delays in between. This is because even if the infected food is eliminated from the stomach in the first bout, microbes can pass into the intestine and multiply, leading to further illness. Symptoms of foodborne illnesses can vary depending on the cause and the individual's immune response.
Some specific examples of foodborne illnesses include typhoid, which can be caused by contaminated meat; cholera, which can be caused by contaminated water or raw vegetables; and Escherichia coli O157:H7 Infection (E. coli O157) which can be caused by contaminated raw foods of animal origin. Bovine spongiform encephalopathy (BSE), also known as mad cow disease, is another example of a foodborne illness caused by consuming meat products containing specified risk materials such as brain tissue.
Foodborne illnesses can have severe and sometimes fatal health consequences, particularly for infants, children, and the elderly, and those with chronic illnesses. More than 70 million cases of foodborne illnesses occur in the United States alone each year, resulting in approximately 5,000 deaths. Foodborne illnesses can also lead to long-lasting disabilities and contribute to the development of serious health problems such as hormonal and metabolic issues and cancer.
To prevent foodborne illnesses, it is important to practice good hygiene and food safety practices. Regular hand-washing before, during, and after food preparation is one of the most effective defenses against foodborne illnesses. Additionally, avoiding the consumption of food with hormones, such as artificial hormones in cow milk, may help reduce the risk of certain health issues associated with foodborne illnesses.
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Food contamination and its sources
Food contamination occurs when something enters food that shouldn't, rendering it unsafe to eat. There are three types of food contamination: biological, chemical, and physical. Foodborne illnesses are usually infectious or toxic in nature and are caused by bacteria, viruses, parasites, or chemical substances entering the body through contaminated food.
Foodborne illnesses can be caused by a number of bacteria, such as Campylobacter jejuni, Salmonella, and Staphylococcal enterotoxins, and chemicals, such as pesticides, medicines, and natural toxic substances, including vomitoxin, poisonous mushrooms, or reef fish. Foodborne illnesses can also be caused by parasites, such as fish-borne trematodes, which are transmitted through food, or tapeworms like Echinococcus spp or Taenia spp, which may infect people through food or direct contact with animals. Other parasites, such as Ascaris, Cryptosporidium, Entamoeba histolytica, or Giardia, can enter the food chain via water or soil and contaminate fresh produce.
Food contamination can also occur through physical objects entering food, such as hair, glass or metal, pests, dirt, or jewellery. In addition, food can become contaminated through contact with infectious food workers or handlers, who may transmit pathogens through bare hand contact or glove-hand contact with food. This can lead to outbreaks caused by norovirus, staphylococcal enterotoxins, or other foodborne illnesses.
Food pollution is a specific type of food contamination that refers to the presence of pollutants in food. Food pollution can occur through environmental pollution, such as water, soil, or air pollution, which accumulates in plants or animals that come into contact with these pollutants. For example, water pollution may accumulate in fish, which are then consumed by birds or other animals, transferring the pollution through the food chain until it reaches humans. Food pollution can also occur through chemicals or microorganisms that come into contact with food during the growing, processing, or packaging stages.
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Food safety and prevention of foodborne illnesses
Foodborne illnesses are caused by consuming contaminated food. These illnesses can be caused by bacteria, viruses, parasites, toxins, chemicals, and other pollutants. Foodborne illnesses can lead to mild to severe health issues, including hormonal and metabolic problems, nervous system issues, and even cancer.
Food safety is essential to prevent foodborne illnesses and ensure the food we eat is safe and nutritious. Here are some key measures to achieve food safety and prevent foodborne illnesses:
Cleanliness and Hygiene
Good hygiene practices are crucial in preventing foodborne illnesses. This includes regular and thorough handwashing with soap and warm water, especially before and after handling food. It is also important to keep utensils, cutting boards, and other surfaces clean and sanitized. Surfaces that come into contact with raw meat, poultry, seafood, and eggs should be washed thoroughly with hot, soapy water before proceeding with food preparation.
Safe Food Handling and Preparation
Cross-contamination is a significant concern. It is important to keep raw and ready-to-eat foods separate to avoid contamination. Use separate utensils and platters for raw and cooked foods. Ensure that food is cooked to the proper temperatures to destroy pathogens. For example, raw beef, pork, lamb, and veal should be cooked to a minimum internal temperature of 145°F.
Safe Food Storage
To prevent food from entering the "Danger Zone," keep cold food cold and hot food hot. Store food in the refrigerator (40°F or below) or freezer (0°F or below) promptly. Do not let food remain at room temperature for extended periods.
Food Source Awareness
Be mindful of the source of your food. Plants can absorb pollutants from the soil, water, and air through their roots. Fish can accumulate pollutants from water, and these pollutants can increase in concentration as they move up the food chain. Try to opt for organic produce and meat from trusted sources whenever possible.
Collaboration and Reporting
Food safety is a collaborative effort between governments, food producers, and consumers. Report any issues with food products to the appropriate authorities, such as the Food Safety and Inspection Service (FSIS) or the USDA Meat and Poultry Hotline. By working together, we can strengthen food safety systems and prevent the spread of contaminated food.
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Health risks and vulnerable populations
Foodborne illnesses are usually infectious or toxic in nature and are caused by bacteria, viruses, parasites, or chemical substances entering the body through contaminated food. Food pollution can cause mild to severe foodborne illnesses and, in rare cases, even death. More than 70 million cases of foodborne illnesses occur in the US every year, resulting in approximately 5,000 deaths. Globally, an estimated 600 million people fall ill from contaminated food annually, with 420,000 dying from foodborne illnesses.
Food pollution can also contribute to or cause serious health problems such as hormonal and metabolic issues, nervous system problems, and various types of cancer. Persistent organic pollutants (POPs) are compounds that accumulate in the environment and the human body and can cause reproductive and developmental issues, damage the immune system, interfere with hormones, and cause cancer. Children, the elderly, pregnant women, and people with chronic illnesses are especially vulnerable to food pollution.
Children under five carry 40% of the foodborne disease burden, with 125,000 deaths every year. The burden of foodborne diseases falls disproportionately on vulnerable groups, especially in low- and middle-income countries. Foodborne illnesses strain healthcare systems and harm national economies, tourism, and trade, impeding socioeconomic development.
In addition to the direct health risks, food pollution also poses indirect risks by threatening food production and supply. Climate change and air pollution impact staple crops like rice, corn, soya, and wheat, reducing yields and nutritional value. With food demand projected to increase sharply by 2050, urgent action is needed to address the impacts of climate change and air pollution on food security.
To protect food security, it is crucial to reduce short-lived climate pollutants (SLCPs) such as methane, hydrofluorocarbons (HFCs), black carbon, and tropospheric ozone. Concerted global efforts can significantly reduce these emissions, benefiting those who rely on agriculture for their livelihoods and helping to end hunger and malnutrition.
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Frequently asked questions
Many diseases can spread through contaminated food, including cholera, Salmonella, Campylobacteriosis, Shigellosis, Vibrio cholerae, Listeria, and Giardia.
Food can become contaminated through improper handling, preparation, or storage. Contamination can also occur during the growing, processing, or packaging stages if food comes into contact with pollutants from the surrounding environment, such as water, soil, or air.
Symptoms can vary depending on the cause but often include vomiting, fever, aches, and diarrhea. Some foodborne illnesses can also cause abdominal pain, nausea, headaches, and cramping.
To prevent foodborne illnesses, it is important to practice good hygiene before, during, and after food preparation, including regular hand-washing. Additionally, always wash food thoroughly before use and ensure that dishes are cooked until piping hot throughout to kill any bacteria.
Infants, young children, the elderly, pregnant women, and individuals with chronic illnesses are typically more sensitive to food pollution and are at a higher risk of developing foodborne illnesses. However, anyone can get sick from contaminated food.
