Which of the following is an example of a physical contaminant?
a.Sanitizer residue left on a cutting board
b.Peanut oil left in the deep fryer
c.A metal staple from a produce box
d.Salmonella on the shell of an egg
Explanation
Physical contaminants are hard or soft foreign objects that can injure a guest: metal staples, glass, bone fragments, hair, fingernails, bandages, and bits of packaging. A metal staple from a produce box is a classic example, which is why deliveries are inspected and boxes are opened away from open food. Sanitizer residue left on a cutting board is chemical contamination, Salmonella on the shell of an egg is biological contamination, and peanut oil left in a deep fryer is allergen cross-contact.
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