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- W3087348390 abstract "Microbial degradation is an important option for combating antibiotic pollution. Arthrobacter nicotianae OTC-16 was isolated as a novel tetracycline-degrading bacterium, which could degrade oxytetracycline/tetracycline (OTC/TET). Toxicity assessment indicated that this bacterium effectively converted OTC into byproducts with less toxicity to bacterial and algal indicators. Six degradation products of OTC were tentatively identified, and a potential biotransformation pathway was proposed that includes decarbonylation, reduction, and dehydration. Bioaugmentation of TC removal with this bacterium was further studied in various matrices. In aqueous media, strain OTC-16 accelerated OTC removal over a temperature range of 20–35 ℃, pH range of 6.0–9.0, and OTC concentration range of 25–150 mg L −1 . The strain also facilitated the decrease of OTC and TET concentrations in both swine and chicken manures, with a maximum decrease of 91.54%, and increased the degradation of OTC in soils by 8.22–45.45%. A unique advantage of this bacterium in promoting OTC degradation in alkaline environments was demonstrated, where it successfully competed with the indigenous microbiota and largely decreased the relative abundances of the studied tetracycline resistance genes ( tet B and tet W) in soil. This work offers a better understanding of the antibiotic bioaugmentation and new microbial sources. • An Arthrobacter nicotianae strain is isolated to degrade tetracyclines. • The bacterium transforms oxytetracycline into nontoxic or low-toxic metabolites. • Possible degradation pathways and products of oxytetracycline were proposed. • Successful bioaugmentation of tetracyclines removal in water, manure, and soil." @default.
- W3087348390 created "2020-09-25" @default.
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- W3087348390 date "2021-02-01" @default.
- W3087348390 modified "2023-10-16" @default.
- W3087348390 title "Degradation of tetracycline antibiotics by Arthrobacter nicotianae OTC-16" @default.
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- W3087348390 doi "https://doi.org/10.1016/j.jhazmat.2020.123996" @default.
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