Food contamination Edit
Food contamination happens when foods are corrupted with another substance. It can happen In the process of production, transportation, packaging, storage, sales, and cooking process. Contamination can be physical, chemical, or biological.[4]
Physical contamination Edit
Physical contaminants (or ‘foreign bodies’) are objects such as hair, plant stalks or pieces of plastic and metal.[5] When a foreign object enters food, it is a physical contaminant.[5] If the foreign objects are bacteria, both a physical and biological contamination will occur.
Common sources of physical contaminations are: hair, glass or metal, pests, jewelry, dirt, and fingernails.[5]
Chemical contamination Edit
Chemical contamination happens when food is contaminated with a natural or artificial chemical substance.[4] Common sources of chemical contamination can include: pesticides, herbicides, veterinary drugs, contamination from environmental sources (water, air or soil pollution), cross-contamination during food processing, migration from food packaging materials, presence of natural toxins, or use of unapproved food additives and adulterants.[6]
Biological contamination Edit
It happens when the food has been contaminated by substances produced by living creatures, such as humans, rodents, pests or microorganisms.[7] This includes bacterial contamination, viral contamination, or parasite contamination that is transferred through saliva, pest droppings, blood or fecal matter.[7] Bacterial contamination is the most common cause of food poisoning worldwide.[7] If an environment is high in starch or protein, water, oxygen, has a neutral pH level, and maintains a temperature between 5°C and 60°C (danger zone) for even a brief period of time (~0–20 minutes),[8] bacteria are likely to survive
https://en.m.wikipedia.org/wiki/Food_safety
Esra Abdalbary
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