Insight into impact of sewage discharge on microbial dynamics and pathogenicity in river ecosystem

Direct sewage discharge could cause copious numbers of serious and irreversible harm to the environment. This study investigated the impacts of treated and raw sewage on the river ecosystem. Through our analysis, sewage carried various nutrients into the river, leading to changes in the microbial co...

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Bibliographic Details
Published in:Scientific reports 2022-04, Vol.12 (1), p.6894-6894, Article 6894
Main Authors: Xie, Yuyang, Liu, Xiaolin, Wei, Haiwei, Chen, Xue, Gong, Ningji, Ahmad, Shakeel, Lee, Taeho, Ismail, Sherif, Ni, Shou-Qing
Format: Article
Language:English
Subjects:
704/158/855
704/172/4081
Aquatic ecosystems
Bacteria - genetics
Community structure
Humanities and Social Sciences
Microbiota
multidisciplinary
Pathogenicity
Pathogens
Rivers
Rivers - chemistry
Science
Science (multidisciplinary)
Self-purification
Sewage
Sewage - microbiology
Sewage analysis
Sewage disposal
Tuberculosis
Virulence
Water Quality
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Summary:Direct sewage discharge could cause copious numbers of serious and irreversible harm to the environment. This study investigated the impacts of treated and raw sewage on the river ecosystem. Through our analysis, sewage carried various nutrients into the river, leading to changes in the microbial community in the river and reducing the diversity and richness of bacteria. The relative abundances of Hydrogenophaga , Thauera , Planctomyces , Zoogloea , and Pseudomonas boosted from 0.25, 0.01, 0.00, 0.05, and 0.08% to 3.33, 3.43, 0.02, 6.28, and 2.69%, before and after raw sewage discharge, respectively. The gene abundance of pathogenic bacteria significantly increased after raw sewage discharge. For instance, the gene abundance of Vibrio , Helicobacter, Tuberculosis, and Staphylococcus augmented from 4055, 3797, 13,545, 33 reads at Site-1 to 23,556, 13,163, 19,887, 734 reads at Site-2, respectively. In addition, according to the redundancy analysis (RDA), the infectious pathogens were positively related to the environmental parameters, in which COD showed the highest positive correlation with Mycobacterium tuberculosis . Additionally, river self-purification may contribute to improving water quality and reducing pathogenicity. The outcomes of this study showed that direct discharge brought pathogens and changed microbial community structure of the river.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-022-09579-x