ARTÍCULO PROYECTO DGA:Incidence of Antimicrobial Residues in Meat Using a Broad Spectrum Screening Strategy

David Sanz^1*, Pedro Razquin¹, Santiago Condón², Teresa Juan³, Benito Herraiz⁴ and Luis Mata¹

¹Department of R&D, ZEULAB S.L., Polígono PLAZA, C/Bari, 25 dpdo, 50197, Zaragoza, Spain.
²Faculty of Veterinary Medicine, University of Zaragoza, C/ Miguel Servet, 177, 50013 Zaragoza, Spain.
³Agrifood Research and Technology Centre of Aragon (CITA), Montañana, 930, 50059 Zaragoza, Spain.
⁴S.A.T. Num 42 Los Gonzalez, C/ Extramuros, s/N, 44300 Monreal del Campo, Spain.

Aims: The aim of this paper was to assess the incidence of antimicrobial residues in market muscle samples from different animal species (bovine, ovine, poultry and porcine) using a new screening strategy.
Methodology: 4849 samples were evaluated with a methodology that combines a broad spectrum microbial test (Explorer) and a specific test for quinolones detection (Equinox). Supplementary tests were performed to achieve additional information about the nature of antimicrobials in positive samples.
Results: In a first step, 355 samples (7.3%) showed a positive result in Explorer and/or Equinox tests. The highest incidence of positive samples was obtained in poultry (9.7%) while the lowest rate was found in porcine samples (3.4%). Half of the positive screening samples (53%) showed also a positive result with supplementary tests indicating that tetracyclines, aminoglycosides sulphonamides and quinolones might be present in these samples. Aminoglycosides were the predominant residues in poultry while tetracyclines were more frequent in bovine and porcine samples. Sulphonamides were the main family of residues found in ovine.
Conclusion: Our results suggest that the current strategies used for control of antimicrobial residues in muscle could not be adequate enough. In order to protect consumers from antibiotic exposition, it should be advisable to implement more efficient methods for the screening of antibiotic residues in muscle.

Keywords :

Screening; antibiotic; antimicrobial residues; muscle; microbiological test.