cross-contamination
US /ˌkrɔs.kən.tæm.əˈneɪ.ʃən/
UK /ˌkrɔs.kən.tæm.əˈneɪ.ʃən/
1.
the process by which bacteria or other microorganisms are unintentionally transferred from one substance or object to another, with harmful effect
:
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To prevent cross-contamination, use separate cutting boards for raw meat and vegetables.
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The hospital implemented strict protocols to minimize the risk of cross-contamination.