4.4 Article

Transfer of certain beta-lactam antibiotics from cow's milk to fresh cheese and whey

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TAYLOR & FRANCIS LTD
DOI: 10.1080/19440049.2021.1973114

关键词

Antibiotic; transfer; milk; whey; cheese

资金

  1. European Union
  2. European Social Fund [EFOP-3.6.2-16-2017-00012]

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The study found that antibiotic residues in milk were not removed effectively by heat treatment, leading to a correlation between the concentrations of antibiotics in fresh cheese and whey with that of milk. Antibiotics were mainly transferred to cheese curd through whey, especially ampicillin & cloxacillin.
The aim of this study was to investigate the transfer of cephalexin, penicillin-G, and ampicillin & cloxacillin from cow's milk to cheese and whey. For this purpose, raw milk was artificially contaminated to different antibiotic levels and then heat-treated to prepare fresh cheese from it. Antibiotic levels of the milk, whey and cheese were measured with LC-MS/MS. The extent of heat degradation was not sufficient to remove the antibiotic residues from milk. Antibiotic concentrations in whey and fresh cheese were in good accordance with the concentration of the same compound in milk suggesting that contamination of the milk will result in contamination of the product. The investigated antibiotics were transferred less into the cheese curd (1.6-12.5% of the original amount), than into the whey (33.2-74.1%). For penicillin-G even 100% (complete removal) was experienced.

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