Food safety management is necessary to prevent food poisoning. Food poisoning results from consuming unsafe or unhygienic food and is mainly caused by bacteria like salmonella and listeria multiplying to disease levels at favorable temperatures. There are different types of food hazards including biological from microbes, chemical from pesticides and cleaning agents, and physical from particles, glass or metal. Keys to safe food include regularly washing hands and surfaces, keeping food at safe temperatures, and using safe water and raw materials.