cross contamination

Main Entry:  cross contamination
Part of Speech:  n
Definition:  the passing of bacteria, microorganisms, or other harmful substances indirectly from one patient to another through improper or unsterile equipment, procedures, or products; also written cross-contamination
Example:  Cross contamination can be transferred to food by hands, food-contact surfaces, sponges, cloth towels and utensils that touch raw food, are not cleaned, and then touch ready-to-eat foods.'s 21st Century Lexicon
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