-بعض الأغذية لديها قابلية أكثر من غيرها لتصبح ملوثة ، ويُطلق عليها إسم: أغذية ذات خطورة محتملة Potentially Hazardous Foods (PHF).

- The June 1940 and 1943 recommendations of the Public Health Service (PHS) for eating and drinking
establishments used the term “readily perishable food and drink.” The “Food Service Sanitation Manual,”
issued in 1962 by the PHS first defined the term “potentially hazardous food” (PHF) as any perishable
food which consists in whole or in part of milk or milk products, eggs, meat, poultry, fish, shellfish, or
other ingredients capable of supporting the rapid and progressive growth of infectious or toxigenic
microorganisms.