数字农科院2.0

Significant effects of earthworm species on antibiotic resistome in livestock manure as revealed by metagenomic analysis

文献类型： 外文期刊

作者： Ming Yang;Liang Peng;Meirui Mu;Fengxia Yang;Zhonghan Li;Bingjun Han;Keqiang Zhang

作者机构：

关键词： Antibiotic resistance genes;Earthworm species;Livestock manure;Microbial communities;Vermicomposting

期刊名称： Environmental Pollution

ISSN： 0269-7491

年卷期： 2025 年 374 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Animal-derived antibiotic resistance genes (ARGs) have emerged as a critical threat, while vermicomposting has been recognized as an effective strategy for reducing ARGs. However, the efficacy of different earthworm species in reducing ARGs remains poorly understood. In this study, 72 vermicompost and earthworm gut samples were collected from various earthworm farms to evaluate the impact of vermicomposting with different earthworm species on ARGs via metagenomic analysis. Approximately 28 ARG types were detected in gut and vermicompost samples. There were significant differences in ARGs among the four species of earthworm composting systems (p < 0.05), and each species possessed its dominant ARGs and microbes. Proteobacteria represented the predominant bacterial phylum within the gut microbiota of Pheretima guillelmi (46.89 %) and Eisenia fetida (48.42 %), whereas Euryarchaeota (36.71 %) and Actinobacteria (39.42 %) were the most abundant in Perionyx excavatus and Eudrilus eugeniae, respectively. The overall abundance of ARGs in vermicompost processed by Eisenia fetida (0.18 copies16S rRNA gene copies) was lower than that observed in other earthworm species (0.23–0.39 copies/16S rRNA gene copies), with gut microbial identified as a key determinant of variations in ARG reduction. These findings provide valuable insights into selecting suitable earthworm species to promote ARG degradation, thus contributing to the decrease in ARG dissemination risks in agricultural ecosystems.

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