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A definition of the term "Physical contamination" is presented. It refers to most forms of foreign body found in food, such as metal staples, nuts, bolts, screws, string and plastic items. This represents inadequate control of certain operations including unpacking of containers and housekeeping procedures and waste storage. There may also be evidence of malicious tampering with food.

An encyclopedia entry for "ant control" is presented. It is noted that infestation by garden ants and Pharoah's ants--carriers of pathogens--poses a problem in food premises. Among the typical control measures are storage of food in closed containers off the floor and treatment of floor and wall surfaces with a residual insecticidal lacquer. It is also advised that since ants are particularly attracted to sweet food products, considerable attention must be paid to housekeeping activities and prompt removal of spillages.