Status of pathogens, antibiotic resistance genes and antibiotic residues in wastewater treatment systems

2017 ◽  
Vol 16 (3) ◽  
pp. 491-515 ◽  
Author(s):  
C. F. Nnadozie ◽  
S. Kumari ◽  
F. Bux
Keyword(s):  
Antibiotic Resistance ◽  
Wastewater Treatment ◽  
Resistance Genes ◽  
Antibiotic Resistance Genes ◽  
Antibiotic Residues ◽  
Wastewater Treatment Systems

scholarly journals Evolution of Antibiotic Resistance and the Relationship between the Antibiotic Resistance Genes and Microbial Compositions under Long-Term Exposure to Tetracycline and Sulfamethoxazole

2019 ◽  
Vol 16 (23) ◽  
pp. 4681 ◽  
Author(s):  
Bingbing Du ◽  
Qingxiang Yang ◽  
Ruifei Wang ◽  
Ruimin Wang ◽  
Qiang Wang ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Wastewater Treatment ◽  
Resistance Genes ◽  
Antibiotic Resistance Genes ◽  
The Core ◽  
Aerobic Wastewater Treatment ◽  
The Relationship ◽  
Bacterial Groups ◽  
Wastewater Treatment Systems

The removal of antibiotics and widespread of antibiotic resistance genes (ARGs) have received continuous attention due to the possible threats to environment. However, little information is available on the evolution of antibiotic resistance and the relationship between ARGs and microbial communities under long-term exposure to sub-inhibitory concentrations of antibiotics. In our study, two laboratory-scale anoxic-aerobic wastewater treatment systems were established and operated for 420 days to investigate the evolution of antibiotic resistance under exposure of 5 mg·L−1 tetracycline (TC) or 5 mg·L−1 TC and 1 mg·L−1 sulfamethoxazole (SMX). The average removal rates of TC and SMX were about 59% and 72%, respectively. The abundance of the main ARGs responsible for resistance to TC and SMX increased obviously after antibiotics addition, especially when TC and SMX in combination (increased 3.20-fold). The tetC and sul1 genes were the predominant genes in the development of TC and SMX resistance, in which gene sul1 had the highest abundance among all the detected ARGs. Network analysis revealed that under antibiotic pressure, the core bacterial groups carrying multiple ARGs formed and concentrated in about 20 genera such as Dechloromonas, Candidatus Accumulibacter, Aeromonas, Rubrivivax, in which intI1 played important roles in transferring various ARGs except sul3.

Biomarkers of antibiotic resistance genes during seasonal changes in wastewater treatment systems

2018 ◽  
Vol 234 ◽  
pp. 79-87 ◽  
Author(s):  
Ya-Nan Jiao ◽  
Zhen-Chao Zhou ◽  
Tao Chen ◽  
Yuan-Yuan Wei ◽  
Ji Zheng ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Wastewater Treatment ◽  
Resistance Genes ◽  
Seasonal Changes ◽  
Antibiotic Resistance Genes ◽  
Wastewater Treatment Systems

scholarly journals Anaerobic Digestion and Removal of Sulfamethoxazole, Enrofloxacin, Ciprofloxacin and Their Antibiotic Resistance Genes in a Full-Scale Biogas Plant

Antibiotics ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 502
Author(s):  
Andrea Visca ◽  
Anna Barra Caracciolo ◽  
Paola Grenni ◽  
Luisa Patrolecco ◽  
Jasmin Rauseo ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Anaerobic Digestion ◽  
Resistance Genes ◽  
Emerging Contaminants ◽  
Antibiotic Resistance Genes ◽  
Animal Manure ◽  
Full Scale ◽  
Antibiotic Residues ◽  
Anaerobic Digesters ◽  
One Year

Anaerobic digestion is one of the best ways to re-use animal manure and agricultural residues, through the production of combustible biogas and digestate. However, the use of antibiotics for preventing and treating animal diseases and, consequently, their residual concentrations in manure, could introduce them into anaerobic digesters. If the digestate is applied as a soil fertilizer, antibiotic residues and/or their corresponding antibiotic resistance genes (ARGs) could reach soil ecosystems. This work investigated three common soil emerging contaminants, i.e., sulfamethoxazole (SMX), ciprofloxacin (CIP), enrofloxacin (ENR), their ARGs sul1, sul2, qnrS, qepA, aac-(6′)-Ib-cr and the mobile genetic element intI1, for one year in a full scale anaerobic plant. Six samplings were performed in line with the 45-day hydraulic retention time (HRT) of the anaerobic plant, by collecting input and output samples. The overall results show both antibiotics and ARGs decreased during the anaerobic digestion process. In particular, SMX was degraded by up to 100%, ENR up to 84% and CIP up to 92%, depending on the sampling time. In a similar way, all ARGs declined significantly (up to 80%) in the digestate samples. This work shows how anaerobic digestion can be a promising practice for lowering antibiotic residues and ARGs in soil.

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