Antibiotic resistance genes, bacterial communities, and functions in constructed wetland-microbial fuel cells: Responses to the co-stresses of antibiotics and zinc

Bench-Scale Liquid-Phase Microaeration and Iron Dosing Comparison for In Situ Biogas Desulfurization and Antibiotic Resistance Management in Mesophilic Anaerobic Digestion

“…The abundances of amino acids degrading Aminobacterium were slightly higher in the microaeration (5%) and iron-dosed (5%) reactors than in the control (2%), showing a sign of higher protein metabolism, which might be associated with ineffective removal of mercaptans. Both microaeration and iron dosing can stimulate the growth of facultative microbes. , A syntrophic partnership between facultative microbes with hydrogenotrophic methanogens was previously reported . The abundance of facultative Anaerolinaceae__T 78 in test reactors was higher than in the control (3–9 vs 1%).…”

Response behavior of antibiotic resistance genes to zinc oxide nanoparticles in cattle manure thermophilic anaerobic digestion process: A metagenomic analysis

“…It is observed that relative abundances of ARGs for tetracycline fosfomycin, mupirocin could be decreased in the presence of ZnO NPs, while ARGs for nitromidazole increased. These variety in the relative abundance of different ARGs was also reported previously and led to inconsistent conclusions due to mainly the application of different experimental conditions, such as the environmental matrix and the duration and dose of zinc exposure (Li et al, 2020a;Li et al, 2020b). The decreased ARGs belonging to category I in G1 (Figure 2b) might have resulted from the blockage on antibiotic resistance induced by ZnO NPs, since zinc has been found to be an inhibitor on SOS-induced hypermutation to rifampin antibiotic in Escherichia coli, and then on SOS-response-related horizontal transfer of ARGs (Crane et al, 2018).…”

“…For example, on the one hand it was observed that zinc could promote the abundance propagation of ARGs in various processes, such as in a three-dimensional biofilm-electrode reactor (Li et al, 2020a), in co-composting swine manure and cotton stalks (Zhang et al, 2018), and over bacterial exposure (Otinov et al, 2020). On the other hand, Li et al (2020b) pointed out that excessive zinc concentration could lead to a decline in the abundance of total ARGs. Besides, zinc elements could reduce the risk of ciprofloxacin resistance by increasing the minimum selection concentration of it (Vos et al, 2020), and could inhibit the horizontal transfer of ARGs by blocking an SOS response (Crane et al, 2018).…”

Organics and Nutrient Transformation in a Microbial Fuel Cell Influenced by Antibiotics

“…[27][28][29][30] The efficacy of MFCs in terms of antibiotic removal and electricity production was greatly dependent on the influent concentration of antibiotics, hydraulic retention time (HRT), electrodes design, and circuit mode of operation. [13,31,32] In MFCs, antibiotics removal is achieved through co-metabolism or electrochemical reduction in which microorganisms utilize electrons to decompose the complex molecules into short-chain organics, which are then oxidized by exoelectrogenic bacteria. [33] Therefore, the availability of substrate sources participating in co-metabolism in MFCs plays a critical role in determining the degradation of antibiotics and bioelectricity generation.…”