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Biotic transformation of anticoccidials in soil using a lab-scale bio-reactor as a precursor-tool
Martin Hansen1, Erland Björklund, Kristine A Krogh
1Section of Toxicology and Environmental Chemistry, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark. mah@farma.ku.dk
Abstract:
Two anticoccidial agents, salinomycin and robenidine, heavily used in the worldwide veterinary meat production, were investigated for their potential biotic degradation by cultured soil bacteria. The degradation-study was performed in lab-scale bio-reactors under aerobic and anaerobic conditions incubated for 200 h with a mixed culture of soil bacteria. Samples were analyzed by LC-MS/MS and potential transformation products were tentatively identified. Salinomycin was degraded under aerobic conditions and traces could be found after 200 h, however, seems more persistent under anaerobic conditions. Four transformation products of salinomycin were discovered. Robenidine was degraded under aerobic and anaerobic conditions, however, traces of robenidine were observed after 200 h. Five biotic transformation products of robenidine were discovered.
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