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Performance Parameters:Demobilization Antibiotic Resistant Bacteria(ARB)and Carrying Genes(ARG)in Wastewater Disinfection
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作者 Solange Kazue Utimura Denise Crocce Romano Espinosa +2 位作者 Marcio Luís Busi da Silva Elisabete de Santis Braga Pedro Jose Alvarez 《Journal of Environmental Science and Engineering(B)》 2024年第1期1-8,共8页
The UV irradiation is used for removing Antibiotic Resistant Bacteria(ARB)and Antibiotic Resistance Genes(ARG)from wastewater treatment.Bacteriophages are viruses that infect within bacteria,are recognized for bacteri... The UV irradiation is used for removing Antibiotic Resistant Bacteria(ARB)and Antibiotic Resistance Genes(ARG)from wastewater treatment.Bacteriophages are viruses that infect within bacteria,are recognized for bacterial control.The influence of some parameters in quantification and performance influencing of pathogen demobilization could be considered in disinfection of wastewater.The comparison of Polyvalent phage(NE1)versus Coliphage(NE4)in suppressing a bacterium Escherichia coli(NDM-1:b-lactam-resistant)with UV irradiation was observed the efficacy in reduction of cells in the disinfection and parameter process.The results with the effect of UV-C irradiation on NDM-1 infected with 1%of NE4 showed a decrease of cells from 8×10^(6)to 2×10^(5)in 60 min with UV-C dose.The NDM1(E.coli)was infected with 1%of NE4(Polyvalent Phage)under magnetic stirring for 1 h,the cells count was 8×10^(6).After 1 h in UV-C e×posure,the cells number reached 3×10^(5).The NDM1 that was e×posed in 1 h of UV-C irradiation and then was infected with 1%of NE4.Cells counting were done 24 h after this procedure.These cells were e×posed in UV-C and showed a reduction in the number of cells from 1×10^(8)to 4×10^(5)after 60 min.The results indicate that bacteriophages can mitigate bacteria species,and combined the conventional water disinfection technologies that can support the microbial safety control strategies. 展开更多
关键词 antibiotic Resistant bacteria(ARB) antibiotic Resistance Genes(ARG) wastewater treatment DISINFECTION Escherichia coli(E.coli).
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UV-Based Advanced Oxidation Processes for Antibiotic Resistance Control: Efficiency, Influencing Factors, and Energy Consumption
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作者 Jiarui Han Wanxin Li +5 位作者 Yun Yang Xuanwei Zhang Siyu Bao Xiangru Zhang Tong Zhang Kenneth Mei Yee Leung 《Engineering》 SCIE EI CAS CSCD 2024年第6期27-39,共13页
Antibiotic resistant bacteria(ARB)with antibiotic resistance genes(ARGs)can reduce or eliminate the effectiveness of antibiotics and thus threaten human health.The United Nations Environment Programme considers antibi... Antibiotic resistant bacteria(ARB)with antibiotic resistance genes(ARGs)can reduce or eliminate the effectiveness of antibiotics and thus threaten human health.The United Nations Environment Programme considers antibiotic resistance the first of six emerging issues of concern.Advanced oxidation processes(AOPs)that combine ultraviolet(UV)irradiation and chemical oxidation(primarily chlorine,hydrogen peroxide,and persulfate)have attracted increasing interest as advanced water and wastewater treatment technologies.These integrated technologies have been reported to significantly elevate the efficiencies of ARB inactivation and ARG degradation compared with direct UV irradiation or chemical oxidation alone due to the generation of multiple reactive species.In this study,the performance and underlying mechanisms of UV/chlorine,UV/hydrogen peroxide,and UV/persulfate processes for controlling ARB and ARGs were reviewed based on recent studies.Factors affecting the process-specific efficiency in controlling ARB and ARGs were discussed,including biotic factors,oxidant dose,UV fluence,pH,and water matrix properties.In addition,the cost-effectiveness of the UV-based AOPs was evaluated using the concept of electrical energy per order.The UV/chlorine process exhibited a higher efficiency with lower energy consumption than other UV-based AOPs in the wastewater matrix,indicating its potential for ARB inactivation and ARG degradation in wastewater treatment.Further studies are required to address the trade-off between toxic byproduct formation and the energy efficiency of the UV/chlorine process in real wastewater to facilitate its optimization and application in the control of ARB and ARGs. 展开更多
关键词 Advanced oxidation processes Ultraviolet/chlorine Ultraviolet/hydrogen peroxide Ultraviolet/persulfate antibiotic resistant bacteria antibiotic resistance genes
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Prevalence of Antibiotic Resistant Bacteria on Tomato Surfaces and Effectiveness of Disinfectants in Reducing the Microbial Load
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作者 Fauzia Ahmed Rupa Munawar Sultana +2 位作者 Yasuhiro Inatsu Md. Latiful Bari Md. Anwar Hossain 《Journal of Food Science and Engineering》 2012年第5期293-300,共8页
This study was conducted to isolate and identify antibiotic resistant bacteria in fresh tomato sold in three different local markets of Dhaka city. On an average 〉 5.0 log CFU/g of natural microbial populations and c... This study was conducted to isolate and identify antibiotic resistant bacteria in fresh tomato sold in three different local markets of Dhaka city. On an average 〉 5.0 log CFU/g of natural microbial populations and coliform bacteria was present in the samples. Prevalence of Salmonella spp., E. coli, Listeria spp., and Yersinia spp., were recorded through cultivation dependent assay of tomato samples of different markets. Almost all of the isolates were uniformly resistant to rifampicin, erythromycin, clindamycin and oxacillin (100%), vancomycin (93%), amoxicillin (87%), whereas 60% of the isolates were found to be resistant to ampicillin and cephalexin. Antibiotic sensitivity test of the presumptive E. coli and Salmonella spp. and corresponding plasmid profiling indicated a correlation of plasmid mediated multidrug resistance (MDR) of these environmental bacteria. Washing with sanitizing agents such as acidified sodium chlorite (ASC) and 200 ppm chlorinated water was able to reduce _〈 2.0 log CFU/g of natural microflora and coliform bacteria. In contrast, ASC was able to reduce 〈 2.0 log CFU/g of other food borne pathogens and, chlorinated water was able to reduce up to undetectable level. Therefore, washing of tomato with 200 ppm chlorinated water could be useful in reducing the pathogen populations on tomatoes. 展开更多
关键词 antibiotic resistant bacteria acidified sodium chlorite chlorinated water E. coli O 157:H7 salmonella spp. tomato.
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Metagenomic insights into microorganisms and antibiotic resistance genes of waste antibiotic fermentation residues along production,storage and treatment processes
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作者 Ziming Han Xiao Luan +3 位作者 Haodi Feng Yanqin Deng Min Yang Yu Zhang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2024年第2期45-55,共11页
Antibiotic fermentation residue(AFR)is nutrient-rich solid waste generated from fermentative antibiotic production process.It is demonstrated that AFR contains high-concentration of remaining antibiotics,and thus may ... Antibiotic fermentation residue(AFR)is nutrient-rich solid waste generated from fermentative antibiotic production process.It is demonstrated that AFR contains high-concentration of remaining antibiotics,and thus may promote antibiotic resistance development in receiving environment or feeding farmed animals.However,the dominate microorganisms and antibiotic resistance genes(ARGs)in AFRs have not been adequately explored,hampering understanding on the potential antibiotic resistance risk development caused by AFRs.Herein,seven kinds of representative AFRs along their production,storage,and treatment processes were collected,and multiple methods including amplicon sequencing,metagenomic sequencing,and bioinformatic approaches were adopted to explore the biological characteristics of AFRs.As expected,antibiotic fermentation producer was found as the predominant species in raw AFRs,which were collected at the outlet of fermentation tanks.However,except for producer species,more environment-derived species persisted in stored AFRs,which were temporarily stored at a semi-open space.Lactobacillus genus,classified as Firmicutes phylum and Bacilli class,became predominant bacterial taxa in stored AFRs,which might attribute to its tolerance to high concentration of antibiotics.Results from metagenomic sequencing together with assembly and binning approaches showed that these newly-colonizing species(e.g.,Lactobacillus genus)tended to carry ARGs conferring resistance to the remaining antibiotic.However,after thermal treatment,remaining antibiotic could be efficiently removed from AFRs,and microorganisms together with DNA could be strongly destroyed.In sum,the main risk from the AFRs was the remaining antibiotic,while environment-derived bacteria which tolerate extreme environment,survived in ARFs with high content antibiotics,and may carry ARGs.Thus,hydrothermal or other harmless treatment technologies are recommended to remove antibiotic content and inactivate bacteria before recycling of AFRs in pharmaceutical industry. 展开更多
关键词 Pharmaceutical manufacturing antibiotic mycelia residue antibiotic resistance bacteria Thermal treatment Solid waste
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Prevention and control strategies for antibiotic resistance:from species to community level
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作者 Yan-Zi Wang Hu Li +4 位作者 Qing-Lin Chen Ting Pan Yong-Guan Zhu Dirk Springael Jian-Qiang Su 《Soil Ecology Letters》 CSCD 2024年第3期17-34,共18页
Antibiotic resistance genes(ARGs)and antibiotic resistant bacteria(ARB)in the environment pose serious threats to environmental security and public health.There is an urgent need for methods to specifically and effect... Antibiotic resistance genes(ARGs)and antibiotic resistant bacteria(ARB)in the environment pose serious threats to environmental security and public health.There is an urgent need for methods to specifically and effectively control environmental pollution or pathogen infection associated with ARGs and ARB.This review aims to provide an overview of methods abating the prevalence and spread of ARGs and ARB from species to community level.At the species level,species-specific technologies,such as nanoparticle-,photosensitizer-,CRISPR-Cas-,and phage-related technology can be utilized to clear a particular class of ARGs or ARB,and in combination with low-dose antibiotics,a higher removal efficiency can be achieved.Moreover,the combination of antibiotics can be used to reverse microbial resistance and treat recurrent antibiotic resistant pathogen infections.At the community level,community-specific strategies,such as biochar,hyperthermophilic compost,and fecal microbiota transplantation can eradicate most types of ARGs or ARB in one shot,reducing the probability of resistance development.Though some progress has been made to eliminate ARGs and ARB in disease treatment or decontamination scenarios,further research is still needed to elucidate their mechanisms of action and scopes of application,and efforts should be made to explore novel strategies to counter the prevalence of antibiotic resistance. 展开更多
关键词 antibiotic resistance genes antibiotic resistant bacteria treatment strategy DISINFECTION
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Activation free energy of Zn(Ⅱ),Co(Ⅱ) binding to metallo-β-lactamase ImiS 被引量:2
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作者 Xia Yang Ya-Jun Zhou +3 位作者 Pei He Yun-Hua Guo Cong-Jun Liu Ke-Wu Yang 《Chinese Chemical Letters》 SCIE CAS CSCD 2014年第10期1323-1326,共4页
In an effort to understand the recombination of a B2 metallo-β-lactamase(MβL),the binding of metals to apo-ImiS was studied by isothermal titration calorimetry and fluorescence spectra.The binding of Zn(Ⅱ),Co... In an effort to understand the recombination of a B2 metallo-β-lactamase(MβL),the binding of metals to apo-ImiS was studied by isothermal titration calorimetry and fluorescence spectra.The binding of Zn(Ⅱ),Co(Ⅱ) to apo-lmiS resulted in activation free energies △G_≠~θ values of 93.719 and 92.948 kJ mol^(-1),respectively,and increasing of fluorescence intensity at maxima emission of 340 nm. 展开更多
关键词 antibiotic resistant bacteria Metallo-β-lactamases Metalloprotein recombinant Thermokinetic parameters
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