Cook food thoroughly, especially meat products and seafood, to kill any bacteria that are harmful to the body, such as E.coli, a bacterium that gets into food and causes disturbances in our system. Its long-term effect is kidney failure, Salmonella is the bacteria that causes food poisoning, and listeria can cause damage to a child's brain and nerves. Keep food at a safe temperature to prevent it from going bad, as microorganisms can multiply very quickly. Dangerous microorganisms still grow below five degrees Celsius. Separate the raw and cooked ones to mix them together to avoid transfers during meal preparation. Cleanliness is right next to godliness, it is in an executive chef's interest to keep his kitchen safe from any misconduct.