Foodborne diseases (including foodborne illness and food poisoning) are all diseases resulting from the spoilage of food contaminated with pathogenic bacteria, viruses or parasites that contaminate food, as well as prions (the causative agents of mad cow disease) and toxins such as aflatoxins in peanuts, poisonous mushrooms and various types of beans that have not been cooked for at least 10 minutes. NOTE: NATES participants will use these revised definitions of contributing factors as of January 1, 2022 for outbreaks occurring in 2022 or later. Definitions for the period 2009-2021 are still available for the reporting of outbreaks that began prior to 2022. The burden of foodborne illness on public health and well-being, as well as economies, has often been underestimated due to under-reporting and the difficulty of establishing causal links between food contamination and the resulting illness or death. In the United States, based on FoodNet data from 2000 to 2007, the CDC estimated that there were 47.8 million foodborne illnesses per year (16,000 cases per 100,000 population), of which 9.4 million were caused by 31 known identified pathogens.  In the past, bacterial infections were thought to be more common because few sites were able to test for norovirus and no active surveillance was conducted for this particular pathogen. Toxins from bacterial infections are delayed because bacteria need time to multiply. As a result, symptoms associated with poisoning are usually not observed until 12 to 72 hours or more after eating contaminated food. However, in some cases, such as staph food poisoning, the disease can appear as early as 30 minutes after ingesting contaminated food.
 Diarrhea, abdominal cramps, nausea, vomiting, headache, fever and chills can be associated with infections caused by this organism. Bacteria are a common cause of foodborne illness. In 2000, the United Kingdom reported the various bacteria involved as Campylobacter jejuni 77.3%, Salmonella 20.9%, Escherichia coli O157:H7 1.4% and all others less than 0.56%.  In addition, foodborne illnesses can be caused by a number of chemicals such as pesticides, drugs and natural toxic substances such as vomitoxin, poisonous fungi or reef fish.  The 2015 WHO report on estimates of the global burden of foodborne illness included initial estimates of the burden of disease for 31 foodborne pathogens (bacteria, viruses, parasites, toxins and chemicals) at global and regional levels. Limited information on the prevalence of asymptomatic carriers presents significant challenges in planning public health initiatives. As disease surveillance depends on estimates of asymptomatic and symptomatic disease rates, the lack of information on carrier prevalence may result in insufficient initiatives to address common public health issues such as C. difficile or influenza.   The International Food Safety Authorities Network (INFOSAN) is a joint programme of WHO and FAO. Since 2004, INFOSAN has been connecting national authorities around the world to prevent the international spread of contaminated food and foodborne diseases and to strengthen food safety systems worldwide.
This is a problem for psychrotrophic pathogenic bacteria (e.g., Listeria monocytogenes, Clostridium botulinum type E, Yersinia enterocolitica, Aeromonas hydrophila), which can multiply for a sufficient time at normal refrigerator temperature and reach sufficient amounts to cause disease or produce toxins when toxic (e.g., C. botulinum). Examples of these types of contributing factors include Unsafe food poses threats to global health and puts everyone at risk. Infants, young children, pregnant women, the elderly, and people with underlying conditions are particularly at risk. Every year, 220 million children contract diarrhoea and 96,000 die from it. Unsafe food causes a vicious cycle of diarrhoea and malnutrition and threatens the nutritional status of the most vulnerable. The infectious dose is the amount of pathogen that must be consumed to produce the symptoms of a foodborne illness and varies depending on the agent, age and general health of the consumer. pathogens vary in the minimum infectious dose; For example, Shigella sonnei has a low estimated minimum dose of <,500 colony forming units (CFUs), while Staphylococcus aureus has a relatively high estimate.
 Diarrhoea or bloody diarrhoea, abdominal cramps, nausea and malaise; can start two to five days after eating and last about eight days. Some, especially the very young, have developed hemolytic uremic syndrome (HUS), which causes acute kidney failure. A similar condition, thrombotic thrombocytopenic purpura (TTP), can occur in the elderly. Clostridioides difficile has also been shown to be transmitted by asymptomatic carriers and pose significant problems in home care settings.  Reports suggesting that more than 50% of long-term patients have fecal contamination despite the absence of symptoms have led many hospitals to extend the contact period until discharge.  The container in which the subject food was or transported consists of toxic substances. The toxic substance migrates into food or seeps into food through contact with highly acidic foods. Examples of these types of contributing factors include the desire expressed by researchers to better predict transmission methods in order to determine the appropriate public health response.  For example, a disease with a low and known rate of asymptomatics may result in increased surveillance of symptomatic cases, while a higher asymptomatic rate could lead to more aggressive methods such as travel bans and mandatory quarantines, as the number of infectious and asymptomatic cases would be unknown.  A person other than food vendors or workers who are suspected or confirmed to be contagious, contaminated, ready-to-eat foods that have subsequently been consumed by others, resulting in the spread of the disease.
A “handler or non-food handler” is a person who is not directly involved in the handling or preparation of food prior to service. A food worker or handler suspected or confirmed to be infectious used his hands to touch or prepare food that was not subsequently cooked, but the epidemiological or environmental investigation could not determine whether the food worker was wearing gloves during food preparation OR whether a suspected or confirmed food worker or food handler, that it is infectious, indirectly contaminates the food (no direct contact with the food with bare hands or glove hands). Bacteria are single-celled organisms that multiply by cell division under appropriate environmental conditions. Conditions that affect bacterial growth are food itself, acid, weather, temperature, oxygen, and humidity. Most bacteria need nutrients to survive. They get these nutrients from food. Bacteria thrive best in neutral to slightly acidic foods (acidity is measured by pH). Microorganisms have different acidity (pH), different temperatures and different oxygen requirements for optimal growth. Bacteria take time to grow and they grow rapidly between 41°F and 140°F.
Bacterial growth is slowed to temperatures below 41°F and limited to temperatures above 140°F. Some bacteria need oxygen to grow (aerobic), others grow when oxygen is not present (anaerobic), and some can grow with or without oxygen (optional). Bacteria thrive when food and water are available. For example, if water is bound or bound to salts or sugars, it is not available to bacteria. This concept of available water is called water activity (Aw). Some parasites, such as fish-borne trematodes, are only transmitted through food. Others, such as tapeworms such as Echinococcus spp or Taenia solium, can infect humans through food or direct contact with animals.