Seasonal Variability in the Microbial Community and Pathogens in Wastewater Final Effluents
| Autor: | Ai-Ling Xu, Juan Yang, Xiang Chen, Xiu Lu Lang, Ming-Yue Guo, Zhi-Wen Song |
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| Rok vydání: | 2019 |
| Předmět: |
0303 health sciences
Veterinary medicine biology 030306 microbiology Firmicutes Geography Planning and Development Bacteroidetes pathogens Pathogenic bacteria Aquatic Science biology.organism_classification medicine.disease_cause bacterial community Biochemistry 03 medical and health sciences seasonal variability Microbial population biology Wastewater Arcobacter medicine Proteobacteria wastewater final effluent Effluent 030304 developmental biology Water Science and Technology |
| Zdroj: | Water Volume 11 Issue 12 |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w11122586 |
| Popis: | Numerous bacteria, especially pathogens, exist in wastewater final effluents, which can lead to possible human health and ecological security risks when effluents are reused or discharged. However, the diversity, composition, and spatiotemporal dynamics of bacteria in wastewater final effluents remain poorly understood. In this study, a comprehensive analysis of the microbial community and pathogens in wastewater final effluents was performed using high-throughput sequencing. The results revealed that wastewater final effluents in autumn exhibited the highest bacterial community richness and diversity, while those in winter exhibited the lowest. Bacteria in wastewater final effluents predominantly belonged to five phyla, in the order of Proteobacteria, Actinobacteria, Planctomycetes, Bacteroidetes, and Firmicutes. At the species level, there were 8~15 dominant species in the wastewater final effluent in each season, and Dokdonella immobilis, Rhizobium gallicum, Candidatus Flaviluna lacus, and Planctomyces limnophilus were the most dominant species in spring, summer, autumn, and winter, respectively. The seasonal variability in bacteria suggested that the microbial diversity and community in wastewater final effluents were mainly influenced by temperature, salinity, disinfection methods, and flocculants. Notably, pathogenic bacteria in wastewater effluents had both the highest relative abundance and species abundance in summer. Arcobacter spp., Legionella spp., and Mycobacterium spp. were the dominant pathogenic bacteria, and all pathogenic bacteria were mainly associated with dermatosis, enteropathies, septicemia, and pneumonia. |
| Databáze: | OpenAIRE |
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