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Epilithic biofilm as a reservoir for functional virulence factors in wastewater-dominant rivers after WWTP upgrade
Mao, Guannan; Liang, Jinsong; Wang, Qiaojuan; Zhao, Chen; Bai, Yaohui; Liu, Ruiping; Liu, Huijuan; Qu, Jiuhui
2021-03
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES
ISSN1001-0742
Volume101Pages:27-35
AbstractVirulence factors (VFs) confer upon pathogens the ability to cause various types of damage or diseases. Wastewater treatment plants (WWTPs) are important point sources for the emission of pathogens and VFs into receiving rivers. Conventional WWTP upgrades are often implemented to improve the water quality of receiving ecosystems. However, knowledge on the pathogens, VFs, and health risks to receiving aquatic ecosystems after upgrade remains limited. In this study, we investigated detailed pathogenic information, including taxa, pathogenicity, and health risk, in two wastewater-dominant rivers after WWTP upgrade. Using 16S rRNA gene sequencing, we screened 14 potential pathogens in water and epilithic biofilm samples, though they were significantly more enriched in the biofilms. Combining 16S rRNA and metagenomic sequencing data, we identified Pseudomonas and Aeromonas as the dominant pathogenic taxa carrying functional VFs (e.g., mobility and offensive) in the epilithic biofilm. Moreover, strong pathogen-specific VF-host co-occurrence events were observed in the epilithic biofilm samples, indicating the importance of biofilms as reservoirs and vehicles for VFs. Further, we demonstrated that mobility VF is crucial for biofilm formation and pathogens in biofilm carrying offensive VF may be highly invasive. Quantification and health risk assessment suggested that the skin contact risk of P. aeruginosa carrying VFs was higher than the acceptable probability of 10(-4) in both water and epilithic biofilm samples, which may threaten ecological and human health. (C) 2020 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
Department中国科学院饮用水科学与技术重点实验室
KeywordWastewater treatment plant upgrade Epilithic biofilm Pathogens Virulence factors Health risk
WOS Research AreaEnvironmental Sciences
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/46208
Collection中国科学院饮用水科学与技术重点实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China
2.Harbin Inst Technol, Sch Civil & Environm Engn, Shenzhen 518055, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Tsinghua Univ, Ctr Water & Ecol, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peop
Recommended Citation
GB/T 7714
Mao, Guannan,Liang, Jinsong,Wang, Qiaojuan,et al. Epilithic biofilm as a reservoir for functional virulence factors in wastewater-dominant rivers after WWTP upgrade[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2021,101:27-35.
APA Mao, Guannan.,Liang, Jinsong.,Wang, Qiaojuan.,Zhao, Chen.,Bai, Yaohui.,...&Qu, Jiuhui.(2021).Epilithic biofilm as a reservoir for functional virulence factors in wastewater-dominant rivers after WWTP upgrade.JOURNAL OF ENVIRONMENTAL SCIENCES,101,27-35.
MLA Mao, Guannan,et al."Epilithic biofilm as a reservoir for functional virulence factors in wastewater-dominant rivers after WWTP upgrade".JOURNAL OF ENVIRONMENTAL SCIENCES 101(2021):27-35.
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