Assessment of Tetracyclines Residues and Tetracycline Resistant Bacteria in Conventional and Organic Baby Foods

Foods

Mónica Guarddon²  José M. Miranda²  Beatriz I. Vázquez²  Alberto Cepeda²  Carlos M. Franco¹ 

[1] Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Veterinary, University of Santiago de Compostela, Carballo Calero st., s/n. 27002-Lugo, Spain;

关键词: tetracycline-resistance;    baby foods;    qPCR;    tet(A) gene;    tet(B) gene;   

DOI  :  10.3390/foods4030306

来源: mdpi

【 摘 要 】

Children are very vulnerable to bacterial infections and they are sometimes subject to antimicrobials for healing. The presence of resistance genes may counteract effects of antimicrobials. This work has thereby compared the amount of tetracycline resistance genes, tet(A) and tet(B), between conventional and organic meat-based or vegetable-based baby foods and used the quantification of these genes to assess the presence of tetracycline residues in these samples. Counts of bacteria harboring the tet(A) gene were higher than those containing tet(B), and there was no difference between the organic and the conventional samples. Samples with detectable amounts of tetracycline residues were also positive for the presence of tet genes, and when the presence of the genes was not detected, the samples were also negative for the presence of residues. The percentages of tetracycline residues were higher in organic samples than in conventional ones. It cannot be concluded that organic formulas are safer than conventional ones for the studied parameters.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.