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Food samples positive for ESBL/AmpC-producing Escherichia coli and/or Klebsiella pneumoniae based on phenotypic tests (EFSA Panel on Biological Hazards, 2011; EUCAST, 2017) and species identification with matrix- assisted laser desorption ionization–time of flight mass spectrometry, including results with a score value of 2.0–3.0.
