The introduction of veterinary antibiotics into environments surrounding dairy operations has become a critical issue in evaluating the spread of antibiotic resistance genes to proximal microorganisms, and future drug efficacy. The removal of widely administered classes of antibiotics from three different dairy waste management practices is examined. This study investigates the relative removal of tetracyclines, sulfonamides, macrolides, �-lactams, cephalosporins, and aminoglycosides by natural aeration, liquid separation, and advanced aerobic digestion provides insight into which regime will prove most effective for future waste disposal.  Ultra-sonication-assisted extraction and tandem anion exchange/hydrophilic lipophilic mix solid phase cleanup is utilized followed by analysis using liquid chromatography tandem mass spectrometry and standard addition quantification.

Assessment of three dairy waste management practices in the removal of common veterinary antibiotics

248th National Meeting (2014)

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