Maximum levels of cross-contamination for 24 antimicrobial active substances in non-target feed.
Part 4: β-Lactams: amoxicillin and penicillin V

Research output: Contribution to journalJournal articleResearch


  • EFSA Panel on Biological Hazards (BIOHAZ)
  • Konstantinos Koutsoumanis
  • Ana Allende
  • Avelino Alvarez-Ordóñez
  • Declan Bolton
  • Sara Bover-Cid
  • Marianne Chemaly
  • Robert Davies
  • Alessandra De Cesare
  • Lieve Herman
  • Friederike Hilbert
  • Roland Lindqvist
  • Maarten Nauta
  • Giuseppe Ru
  • Marion Simmons
  • Panagiotis Skandamis
  • Elisabetta Suffredini
  • Dan I Andersson
  • Vasileios Bampidis
  • Johan Bengtsson-Palme
  • Damien Bouchard
  • Aude Ferran
  • Maryline Kouba
  • Secundino López Puente
  • Marta López-Alonso
  • Alena Pechová
  • Mariana Petkova
  • Sebastien Girault
  • Alessandro Broglia
  • Beatriz Guerra
  • Matteo Lorenzo Innocenti
  • Ernesto Liébana
  • Gloria López-Gálvez
  • Paola Manini
  • Pietro Stella
  • Luisa Peixe
Abstract The specific concentrations of amoxicillin and penicillin V in non-target feed for food-producing animals, below which there would not be an effect on the emergence of, and/or selection for, resistance in bacteria relevant for human and animal health, as well as the specific antimicrobial concentrations in feed which have an effect in terms of growth promotion/increased yield were assessed by EFSA in collaboration with EMA. Details of the methodology used for this assessment, associated data gaps and uncertainties, are presented in a separate document. To address antimicrobial resistance, the Feed Antimicrobial Resistance Selection Concentration (FARSC) model developed specifically for the assessment was applied. However, due to the lack of data on the parameters required to calculate the FARSC, it was not possible to conclude the assessment until further experimental data become available. To address growth promotion, data from scientific publications obtained from an extensive literature review were used. Levels in feed that showed to have an effect on growth promotion/increased yield were reported for amoxicillin, whilst for penicillin V no suitable data for the assessment were available. It was recommended to carry out studies to generate the data that are required to fill the gaps which prevented the calculation of the FARSC for these two antimicrobials.
Original languageEnglish
Article numbere06855
JournalEFSA Journal
Issue number10
Pages (from-to)1-26
Number of pages26
Publication statusPublished - 26 Oct 2021

    Research areas

  • amoxicillin, penicillin V, antimicrobial resistance, sub-inhibitory concentration, growth promotion, yield increase, food-producing animals

ID: 282610863