Mitigating Tetracycline antibiotic contamination in chicken manure using ex situ fermentation system

文献类型： 外文期刊

第一作者： Li, Luyao

作者： Li, Luyao;Liu, Xue;Li, Jiabin;Chen, Zhuobo;Song, Tingting;Jin, Shan;Zhu, Changxiong;Luo, Liangguo;Geng, Bing;Zhu, Jie

作者机构：

关键词： Tetracycline resistance genes; Chicken manure; Ex situ fermentation systems; Bacterial community; Environmental risk

期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：8.7； 五年影响因子：8.4 ）

ISSN： 0301-4797

年卷期： 2024 年 356 卷

页码：

收录情况： SCI

摘要： Excessive use of tetracycline antibiotics in poultry farming results in significant concentrations of these drugs and tetracycline resistance genes (TRGs) in chicken manure, impacting both environmental and human health. Our research represents the first investigation into the removal dynamics of chlortetracycline (CTC) and TRGs in different layers of an ex situ fermentation system (EFS) for chicken waste treatment. By pinpointing and analyzing dominant TRGs-harboring bacteria and their interactions with environmental variables, we've closed an existing knowledge gap. Findings revealed that CTC's degradation half-lives spanned 3.3-5.8 days across different EFS layers, and TRG removal efficiency ranged between 86.82% and 99.52%. Network analysis highlighted Proteobacteria and Actinobacteria's essential roles in TRGs elimination, whereas Chloroflexi broadened the potential TRG hosts in the lower layer. Physical and chemical conditions within the EFS influenced microbial community diversity, subsequently impacting TRGs and integrons. Importantly, our study reports that the middle EFS layer exhibited superior performance in eliminating CTC and key TRGs (tetW, tetG, and tetX) as well as intI2. Our work transcends immediate health and environmental remediation by offering insights that encourage sustainable agriculture practices.

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