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Sitotaw B, Ayalew F, Girma A, Geta K, Tadesse B, Birhanu AG. High Prevalence of Antibiotic Resistance Bacteria Isolated From Bahir Dar City Municipal Solid Waste Dumpsite, North West Ethiopia. ENVIRONMENTAL HEALTH INSIGHTS 2024; 18:11786302241260508. [PMID: 38859927 PMCID: PMC11163931 DOI: 10.1177/11786302241260508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Accepted: 05/23/2024] [Indexed: 06/12/2024]
Abstract
The emergence and spread of antibiotic resistance (ABR) have been a public health challenge globally. The burden is even higher in low-income countries where there is a lack of appropriate healthcare systems, and inappropriate antibiotic disposal practices and utilization. Due to poor solid waste disposal practices in developing nations, municipal solid waste dumpsite (MSWDS) can be a reservoir for ABR bacteria. However, only a few studies demonstrated the prevalence of ABR in non-clinical environments such as MSWDS. This study assessed the prevalence of ABR bacteria at Bahir Dar City MSWDS, to understand the public health risks related to poor solid waste disposal systems. Nine soil samples were collected from the dumpsite. Bacteria were isolated, identified and tested for ABR. Seventy-one distinct colonies were isolated from all samples and identified into 10 bacterial genera based on morphological features and biochemical tests. For ABR tests, gentamicin (GN, 10 μg), streptomycin (ST, 30 μg), tetracycline (TE, 30 μg), ciprofloxacin (CIP, 5 μg), nalidixic acid (NAA, 30 μg), sulfonamide (SA, 250 μg), chloramphenicol (C, 30 μg), erythromycin (E, 15 μg), vancomycin (V, 30 μg), and amoxicillin (AMX, 25 μg) were used. The most frequently isolated bacteria were Staphylococcus (23%) followed by Escherichia species (17%). Ten isolates related to Bacillus spp. were excluded from the antibiotic sensitivity test as there is no standard regarding this genus in the Clinical and Laboratory Standards Institute. The overall antibiotic résistance rate was 95.08%, and most isolates were found to be resistant to amoxicillin (100%), nalidixic acid (75.5%), and vancomycin (75%). Substantial proportions of the isolates were also resistant to tetracycline (55.35%), streptomycin (54.5%), and sulfonamide (50%). The overall multidrug resistance (MDR) rate was 36.06%. This high level of ABR calls for urgent intervention in waste management systems and regular surveillance programs.
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Affiliation(s)
- Baye Sitotaw
- Department of Biology, Bahir Dar University, Bahir Dar, Ethiopia
| | | | - Abayeneh Girma
- Department of Biology, Mekdela Amba University, Tuluawlia, Ethiopia
| | - Kindu Geta
- Department of Biology, Debre Tabor University, Debre Tabor, Ethiopia
| | - Beselam Tadesse
- Bio and Emerging Technology Institute (BETin), Addis Ababa, Ethiopia
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Sammarro Silva KJ, Lima AR, Dias LD, de Souza M, Nunes Lima TH, Bagnato VS. Hydrogen peroxide preoxidation as a strategy for enhanced antimicrobial photodynamic action against methicillin-resistant Staphylococcus aureus. JOURNAL OF WATER AND HEALTH 2023; 21:1922-1932. [PMID: 38153721 PMCID: wh_2023_245 DOI: 10.2166/wh.2023.245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
Antimicrobial photodynamic treatment (aPDT) is a photooxidative process based on the excitation of a photosensitizer (PS) in the presence of molecular oxygen, under specific wavelengths of light. It is a promising method for advanced treatment of water and wastewater, particularly targeting disinfection challenges, such as antibiotic-resistant bacteria (ARB). Research in improved aPDT has been exploring new PS materials, and additives in general. Hydrogen peroxide (H2O2) a widely applied disinfectant, mostly in the food industry and clinical settings, present environmentally negligible residuals at the usually applied concentrations, making it friendly for the water and wastewater sectors. Here, we explored the effects of preoxidation with H2O2 followed by blue light-mediated (450 nm) aPDT using curcumin (a natural-based PS) against methicillin-resistant Staphylococcus aureus (MRSA). Results of the sequential treatment pointed to a slight hampering in aPDT efficiency at very low H2O2 concentrations, followed by an increasing cooperative effect up to a deleterious point (≥7 log10 inactivation in CFU mL-1), suggesting a synergistic interaction of preoxidation and aPDT. The increased performance in H2O2-pretreated aPDT encourages studies of optimal operational conditions for the assisted technology and describes potentials for using the described strategy to tackle the issue of ARB spread.
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Affiliation(s)
- Kamila Jessie Sammarro Silva
- Environmental Biophotonics Laboratory, São Carlos Institute of Physics (IFSC), University of São Paulo (USP), 13563-120 São Carlos/SP, Brazil E-mail:
| | - Alessandra Ramos Lima
- Environmental Biophotonics Laboratory, São Carlos Institute of Physics (IFSC), University of São Paulo (USP), 13563-120 São Carlos/SP, Brazil
| | - Lucas Danilo Dias
- Laboratório de Novos Materiais, Universidade Evangélica de Goiás, Anápolis 75083-515, GO, Brazil
| | - Mariana de Souza
- Environmental Biophotonics Laboratory, São Carlos Institute of Physics (IFSC), University of São Paulo (USP), 13563-120 São Carlos/SP, Brazil
| | - Thalita Hellen Nunes Lima
- Environmental Biophotonics Laboratory, São Carlos Institute of Physics (IFSC), University of São Paulo (USP), 13563-120 São Carlos/SP, Brazil
| | - Vanderlei Salvador Bagnato
- Environmental Biophotonics Laboratory, São Carlos Institute of Physics (IFSC), University of São Paulo (USP), 13563-120 São Carlos/SP, Brazil; Biomedical Engineering, Texas A&M University College of Engineering, 3127 TAMU, College Station, TX 77843-3127, USA
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3
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Miao J, Ling Y, Chen X, Wu S, Liu X, Xu S, Umar S, Anderson BD. Assessing the nonlinear association of environmental factors with antibiotic resistance genes (ARGs) in the Yangtze River Mouth, China. Sci Rep 2023; 13:20367. [PMID: 37989759 PMCID: PMC10663556 DOI: 10.1038/s41598-023-45973-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 10/26/2023] [Indexed: 11/23/2023] Open
Abstract
The emergence of antibacterial resistance (ABR) is an urgent and complex public health challenge worldwide. Antibiotic resistant genes (ARGs) are considered as a new pollutant by the WHO because of their wide distribution and emerging prevalence. The role of environmental factors in developing ARGs in bacterial populations is still poorly understood. Therefore, the relationship between environmental factors and bacteria should be explored to combat ABR and propose more tailored solutions in a specific region. Here, we collected and analyzed surface water samples from Yangtze Delta, China during 2021, and assessed the nonlinear association of environmental factors with ARGs through a sigmoid model. A high abundance of ARGs was detected. Amoxicillin, phosphorus (P), chromium (Cr), manganese (Mn), calcium (Ca), and strontium (Sr) were found to be strongly associated with ARGs and identified as potential key contributors to ARG detection. Our findings suggest that the suppression of ARGs may be achieved by decreasing the concentration of phosphorus in surface water. Additionally, Group 2A light metals (e.g., magnesium and calcium) may be candidates for the development of eco-friendly reagents for controlling antibiotic resistance in the future.
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Affiliation(s)
- Jiazheng Miao
- Division of Natural and Applied Science, Duke Kunshan University, Kunshan, Jiangsu, China
- Department of Biomedical Informatics, Harvard Medical School, Boston, MA, USA
| | - Yikai Ling
- Division of Natural and Applied Science, Duke Kunshan University, Kunshan, Jiangsu, China
- Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Xiaoyuan Chen
- Division of Natural and Applied Science, Duke Kunshan University, Kunshan, Jiangsu, China
- Department of Biomedical Engineering, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Siyuan Wu
- Division of Natural and Applied Science, Duke Kunshan University, Kunshan, Jiangsu, China
- Department of Statistics, University of Michigan, Ann Arbor, MI, USA
| | - Xinyue Liu
- Division of Natural and Applied Science, Duke Kunshan University, Kunshan, Jiangsu, China
| | - Shixin Xu
- Division of Natural and Applied Science, Duke Kunshan University, Kunshan, Jiangsu, China
- Global Health Research Center, Duke Kunshan University, Kunshan, Jiangsu, China
| | - Sajid Umar
- Division of Natural and Applied Science, Duke Kunshan University, Kunshan, Jiangsu, China
- Global Health Research Center, Duke Kunshan University, Kunshan, Jiangsu, China
| | - Benjamin D Anderson
- Division of Natural and Applied Science, Duke Kunshan University, Kunshan, Jiangsu, China.
- Global Health Research Center, Duke Kunshan University, Kunshan, Jiangsu, China.
- Department of Environmental and Global Health, College of Public Health and Health Professions, and Emerging Pathogens Institute, University of Florida, Gainesville, FL, 32610, USA.
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Xiong W, Yang J, Zeng J, Xiao D, Tong C, Zeng Z. Metagenomic analysis of antimicrobial resistance in ducks, workers, and the environment in duck farms, southern China. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 262:115191. [PMID: 37390725 DOI: 10.1016/j.ecoenv.2023.115191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 05/09/2023] [Accepted: 06/24/2023] [Indexed: 07/02/2023]
Abstract
Duck farms are one of the important reservoirs of antimicrobial resistance genes (ARGs) that spread to humans and the environment. However, few studies have focused on the characteristics of antimicrobial profiles in duck farms. Here we explored the distribution characteristics and potential transmission mechanisms of ARGs in ducks, farm workers, and the environment in duck farms by a metagenomic approach. The results showed that the highest abundance and diversity of ARGs were found in duck manure. The abundance and diversity of ARGs in workers and environmental samples were higher than those in the control group. tet(X) and its variants were prevalent in duck farms, with tet(X10) being the most abundant. The genetic structure "tet(X)-like + α/β hydrolase" was found in ducks, workers, and the environment, implying that tet(X) and its variants have been widely spread in duck farms. Network analysis indicated that ISVsa3 and IS5075 might play an important role in the coexistence of ARGs and metal resistance genes (MRGs). The Mantel tests showed that mobile genetic elements (MGEs) were significantly correlated with ARG profiles. The results suggest that duck manure may be a potential hotspot source of ARGs, including tet(X) variants that spread to the surrounding environment and workers via MGEs. These results help us optimize the antimicrobials strategy and deepen our understanding of ARG spread in duck farms.
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Affiliation(s)
- Wenguang Xiong
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou 510642, China; National Laboratory of Safety Evaluation (Environmental Assessment) of Veterinary Drugs, South China Agricultural University, Guangzhou 510642, China; National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou 510642, China
| | - Jintao Yang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou 510642, China; National Laboratory of Safety Evaluation (Environmental Assessment) of Veterinary Drugs, South China Agricultural University, Guangzhou 510642, China; National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou 510642, China
| | - Jiaxiong Zeng
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Southern Marine Science and Engineering Guangdong Laboratory, (Zhuhai), Sun Yat-sen University, Guangzhou 510006, China
| | - Danyu Xiao
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou 510642, China; National Laboratory of Safety Evaluation (Environmental Assessment) of Veterinary Drugs, South China Agricultural University, Guangzhou 510642, China; National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou 510642, China
| | - Cuihong Tong
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou 510642, China; National Laboratory of Safety Evaluation (Environmental Assessment) of Veterinary Drugs, South China Agricultural University, Guangzhou 510642, China; National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou 510642, China
| | - Zhenling Zeng
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou 510642, China; National Laboratory of Safety Evaluation (Environmental Assessment) of Veterinary Drugs, South China Agricultural University, Guangzhou 510642, China; National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou 510642, China.
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Zhao M, Gao J, Zhang H, Cui Y, Wang Z, Zhao Y, Zhang Y, Liu Y. Quaternary ammonium compounds promoted anoxic sludge granulation and altered propagation risk of intracellular and extracellular antibiotic resistance genes. JOURNAL OF HAZARDOUS MATERIALS 2023; 445:130464. [PMID: 36444811 DOI: 10.1016/j.jhazmat.2022.130464] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/14/2022] [Accepted: 11/22/2022] [Indexed: 06/16/2023]
Abstract
Surfactants could influence sludge morphology and disinfectants were linked to antibiotic resistance genes (ARGs). Thus, the response of activated sludge and ARGs to long-term quaternary ammonium compounds (QACs) exposure required further investigation, which is a popular surfactant and disinfectant. Here, three sequencing batch reactors were fed with 5 mg/L most frequently detected QACs (dodecyl trimethyl ammonium chloride (ATMAC C12), dodecyl benzyl dimethyl ammonium chloride (BAC C12) and didodecyl dimethyl ammonium chloride (DADMAC C12)) for 180 d. The long-term inhibitory effect on denitrification ranked: DADMAC C12 > BAC C12 > ATMAC C12. Besides, obvious granular sludge promoted by the increase of α-Helix/(β-Sheet + Random coil) appeared in DADMAC C12 system. Moreover, intracellular ARGs increased when denitrification systems encountered QACs acutely but decreased in systems chronically exposed to QACs. Although replication and repair metabolism in ATMAC C12 system was higher, ATMAC C12 significantly promoted proliferation of extracellular ARGs. It was noteworthy that the propagation risk of extracellular ARGs in sludge increased significantly during sludge granulation process, and intracellular sul2 genes in sludge and water both increased with the granular diameter in DADMAC C12 system. The universal utilization of QACs may enhance antibiotic resistance of bacteria in wastewater treatment plants, deserving more attention.
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Affiliation(s)
- Mingyan Zhao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
| | - Jingfeng Gao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
| | - Haoran Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
| | - Yingchao Cui
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
| | - Zhiqi Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
| | - Yifan Zhao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
| | - Yi Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
| | - Ying Liu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
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6
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Schmidt SBI, Rodríguez-Rojas A, Rolff J, Schreiber F. Biocides used as material preservatives modify rates of de novo mutation and horizontal gene transfer in bacteria. JOURNAL OF HAZARDOUS MATERIALS 2022; 437:129280. [PMID: 35714537 DOI: 10.1016/j.jhazmat.2022.129280] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 05/20/2022] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
Antimicrobial resistance (AMR) is a global health problem with the environment being an important compartment for the evolution and transmission of AMR. Previous studies showed that de-novo mutagenesis and horizontal gene transfer (HGT) by conjugation or transformation - important processes underlying resistance evolution and spread - are affected by antibiotics, metals and pesticides. However, natural microbial communities are also frequently exposed to biocides used as material preservatives, but it is unknown if these substances induce mutagenesis and HGT. Here, we show that active substances used in material preservatives can increase rates of mutation and conjugation in a species- and substance-dependent manner, while rates of transformation are not increased. The bisbiguanide chlorhexidine digluconate, the quaternary ammonium compound didecyldimethylammonium chloride, the metal copper, the pyrethroid-insecticide permethrin, and the azole-fungicide propiconazole increase mutation rates in Escherichia coli, whereas no increases were identified for Bacillus subtilis and Acinetobacter baylyi. Benzalkonium chloride, chlorhexidine and permethrin increased conjugation in E. coli. Moreover, our results show a connection between the RpoS-mediated general stress and the RecA-linked SOS response with increased rates of mutation and conjugation, but not for all biocides. Taken together, our data show the importance of assessing the contribution of material preservatives on AMR evolution and spread.
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Affiliation(s)
- Selina B I Schmidt
- Division of Biodeterioration and Reference Organisms (4.1), Department of Materials and the Environment, Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 87, 12205 Berlin, Germany.
| | - Alexandro Rodríguez-Rojas
- Evolutionary Biology, Institute of Biology, Freie Universität Berlin, Königin-Luise-Straße 1-3, 14195 Berlin, Germany; Internal Medicine - Vetmeduni Vienna, Veterinärplatz 1, 1210 Vienna, Austria.
| | - Jens Rolff
- Evolutionary Biology, Institute of Biology, Freie Universität Berlin, Königin-Luise-Straße 1-3, 14195 Berlin, Germany.
| | - Frank Schreiber
- Division of Biodeterioration and Reference Organisms (4.1), Department of Materials and the Environment, Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 87, 12205 Berlin, Germany.
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Al Salah DMM, Laffite A, Sivalingam P, Poté J. Occurrence of toxic metals and their selective pressure for antibiotic-resistant clinically relevant bacteria and antibiotic-resistant genes in river receiving systems under tropical conditions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:20530-20541. [PMID: 34739670 PMCID: PMC8898216 DOI: 10.1007/s11356-021-17115-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 10/15/2021] [Indexed: 04/15/2023]
Abstract
The co-occurrence of heavy metals, antibiotic-resistant bacteria (ARB) and antibiotic-resistance genes (ARGs) from hospital effluents spreading into the river receiving systems and evaluating associated risks are topics of scientific interest and still under-studied in developing countries under tropical conditions. To understand the selectors of the ARGs, we examined the occurrence of heavy metals (Cr, Co, Ni, Cu, Cd, Pb and Zn), associated ARB (β-lactam-resistant Escherichia coli, β-lactam-resistant Enterobacteriaceae, and carbapenem-resistant Enterobacteriaceae) and ARGs (blaOXA, blaCTX-M, blaIMP, blaTEM) in water and sediments from two sub-urban rivers receiving urban and hospital effluent waters in the Democratic Republic of the Congo (DRC). High abundances of ARB and ARGs were observed in all sediment samples. All the metal contents correlated negatively with grain size (- 0.94 ≤ r ≤ - 0.54, p < 0.05) except for Ni and positively with organic matter content and total copies of 16 s rRNA (0.42 ≤ r ≤ 0.79, p < 0.05), except for Ni and Zn. The metals had a significant positive correlation with the faecal indicator Enterococcus except for Ni and Cd (0.43 ≤ r ≤ 0.67, p < 0.05). Carbapenem-resistant Enterobacteriaceae correlated negatively with Zn (r = - 0.44, p < 0.05) and positively with all the rest of toxic metals (0.58 ≤ r ≤ 1.0, p < 0.05). These results suggested that some metals had a great influence on the persistence of ARB and ARGs in sediments. Overall, this study strongly recommends the managing urban wastewater to preserve water resources used for human and agricultural purposes. Additionally, we recommend the utilizing biological indicators (faecal indicator bacteria, ARB, ARGs) when investigating urban wastewater pollutions.
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Affiliation(s)
- Dhafer Mohammed M Al Salah
- Department F. A. Forel, Faculty of Sciences, Earth and Environmental Sciences, Institute F. A. Forel and Institute of Environmental Sciences, University of Geneva, Bd Carl-Vogt 66, CH-1211, Geneva 4, Switzerland
- King Abdulaziz City for Science and Technology, Joint Centers of Excellence Program, Prince Turki the 1st St, Riyadh, 11442, Saudi Arabia
| | - Amandine Laffite
- Department F. A. Forel, Faculty of Sciences, Earth and Environmental Sciences, Institute F. A. Forel and Institute of Environmental Sciences, University of Geneva, Bd Carl-Vogt 66, CH-1211, Geneva 4, Switzerland
| | - Periyasamy Sivalingam
- Postgraduate and Research Department of Microbiology, Jamal Mohamed College, Tamil Nadu, Tiruchirappalli, 620020, India
| | - John Poté
- Department F. A. Forel, Faculty of Sciences, Earth and Environmental Sciences, Institute F. A. Forel and Institute of Environmental Sciences, University of Geneva, Bd Carl-Vogt 66, CH-1211, Geneva 4, Switzerland.
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Chan CW, Sun H, Wang Y, Zhao Z, O'Neill R, Siu SY, Chu X, Banaei N, Ren K. "Barcode" cell sensor microfluidic system: Rapid and sample-to-answer antimicrobial susceptibility testing applicable in resource-limited conditions. Biosens Bioelectron 2021; 192:113516. [PMID: 34330036 DOI: 10.1016/j.bios.2021.113516] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 07/14/2021] [Indexed: 12/24/2022]
Abstract
Many rapid antimicrobial susceptibility testing (AST) methods have been proposed to contain clinical antimicrobial resistance (AMR) and preserve the effectiveness of remaining antimicrobials. However, far fewer methods have been proposed to test AMR in resource-limited conditions, such as for frequent safety screenings of water/food/public facilities, urgent surveys of massive samples during a pandemic, or AMR tests in low-income countries. Rapid AST methods realized thus far have a variety of drawbacks when used for such surveys, e.g., high cost and the requirement of expensive instruments such as microscopy. A more reasonable strategy would be to screen samples via onsite testing first, and then send any sample suspected to contain AMR bacteria for advanced testing. Accordingly, a cost-efficient AST is demanded, which can rapidly process a large number of samples without using expensive equipment. To this end, current work demonstrates a novel "barcode" cell sensor based on an adaptive linear filter array as a fully automatic and microscope-free method for counting very small volumes of cells (~1.00 × 104 cells without pre-incubation), wherein suspended cells concentrate into microbars with length proportional to the number of cells. We combined this sensor with an on-chip culture approach we had demonstrated for rapid and automated drug exposure and realized a low-cost and resource-independent platform for portable AST, from which results can be obtained simply through a cell phone. This method has a much shorter turnaround time (2-3 h) than that of standard methods (16-24 h). Thanks to its microscopy-free analysis, affordability, portability, high throughput, and user-friendliness, our "barcode" AST system has the potential to fulfill the various demands of AST when advanced facilities are not available, making it a promising new tool in the fight against AMR.
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Affiliation(s)
- Chiu-Wing Chan
- Department of Chemistry, Hong Kong Baptist University. Waterloo Road, Kowloon, Hong Kong, China
| | - Han Sun
- Department of Chemistry, Hong Kong Baptist University. Waterloo Road, Kowloon, Hong Kong, China
| | - Yisu Wang
- Department of Chemistry, Hong Kong Baptist University. Waterloo Road, Kowloon, Hong Kong, China
| | - Zhihao Zhao
- Department of Computer Science, Hong Kong Baptist University. Waterloo Road, Kowloon, Hong Kong, China
| | - Ryan O'Neill
- Department of Chemistry, Hong Kong Baptist University. Waterloo Road, Kowloon, Hong Kong, China; Department of Chemistry, Georgia State University, Atlanta, GA, United States
| | - Sin-Yung Siu
- Department of Chemistry, Hong Kong Baptist University. Waterloo Road, Kowloon, Hong Kong, China
| | - Xiaowen Chu
- Department of Computer Science, Hong Kong Baptist University. Waterloo Road, Kowloon, Hong Kong, China
| | - Niaz Banaei
- Department of Pathology Clinical, Stanford University School of Medicine, Stanford, CA, United States
| | - Kangning Ren
- Department of Chemistry, Hong Kong Baptist University. Waterloo Road, Kowloon, Hong Kong, China; HKBU Institute of Research and Continuing Education, Shenzhen, China; State Key Laboratory of Environmental and Biological Analysis, The Hong Kong Baptist University, Waterloo Road, Kowloon, Hong Kong, China.
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9
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Montoro-Dasi L, Villagra A, Vega S, Marin C. Influence of farm management on the dynamics of Salmonella enterica serovar Infantis shedding and antibiotic resistance during the growing period of broiler chickens. Vet Rec 2021; 188:e302. [PMID: 33870529 DOI: 10.1002/vetr.302] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 11/26/2020] [Accepted: 03/07/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND Salmonella enterica serovar Infantis is a zoonotic pathogen isolated in broilers causing great economic losses in the European poultry sector. It is demonstrated that an investment in management measures at farm level could directly affect the control of food chain microorganisms. The aim of this study was to investigate the development of S. Infantis antimicrobial resistance (AMR) patterns during the growing period, according to flock density and ventilation management, without antibiotic administration. METHODS The experiment was performed in two identical poultry houses, evaluating commercial and optimal farm conditions. At 24 h of rearing, 20% of the animals were orally infected with a S. Infantis strain susceptible to all the antibiotics tested. To study Salmonella shedding, faeces samples from each experimental group were taken weekly and analysed as per ISO/TS 6579-2:2017. Antibiotic susceptibility was assessed according to Decision 2013/653. RESULTS Salmonella shedding showed that the lowest counts were observed in the first week post-infection and highest at slaughter day for both groups. Moreover, 100% of the isolates were multi-resistant. CONCLUSION The acquisition of AMR by S. Infantis starts at the onset of the production cycle and is maintained until the end, demonstrating the importance of transmission of AMR in zoonotic bacteria at farm level.
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Affiliation(s)
- Laura Montoro-Dasi
- Instituto de Ciencia y Tecnología Animal, Universidad Politécnica de Valencia, Valencia, Spain.,Centro de Calidad Avícola y Alimentación Animal de la Comunidad Valenciana (CECAV), Castellón, Spain
| | - Arantxa Villagra
- Centro de Investigación y Tecnología Animal, Instituto Valenciano de Investigaciones Agrarias, Castellón, Spain
| | - Santiago Vega
- Departamento de Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Instituto de Ciencias Biomédicas, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, Moncada, España
| | - Clara Marin
- Departamento de Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Instituto de Ciencias Biomédicas, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, Moncada, España
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10
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Potential Environmental and Human Health Risks Caused by Antibiotic-Resistant Bacteria (ARB), Antibiotic Resistance Genes (ARGs) and Emerging Contaminants (ECs) from Municipal Solid Waste (MSW) Landfill. Antibiotics (Basel) 2021; 10:antibiotics10040374. [PMID: 33915892 PMCID: PMC8065726 DOI: 10.3390/antibiotics10040374] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/25/2021] [Accepted: 03/27/2021] [Indexed: 02/07/2023] Open
Abstract
The disposal of municipal solid waste (MSW) directly at landfills or open dump areas, without segregation and treatment, is a significant concern due to its hazardous contents of antibiotic-resistant bacteria (ARB), antibiotic resistance genes (ARGs), and metal resistance genes (MGEs). The released leachate from landfills greatly effects the soil physicochemical, biological, and groundwater properties associated with agricultural activity and human health. The abundance of ARB, ARGs, and MGEs have been reported worldwide, including MSW landfill sites, animal husbandry, wastewater, groundwater, soil, and aerosol. This review elucidates the occurrence and abundance of ARB, ARGs, and MRGs, which are regarded as emerging contaminants (ECs). Recently, ECs have received global attention because of their prevalence in leachate as a substantial threat to environmental and public health, including an economic burden for developing nations. The present review exclusively discusses the demands to develop a novel eco-friendly management strategy to combat these global issues. This review also gives an intrinsic discussion about the insights of different aspects of environmental and public health concerns caused due to massive leachate generation, the abundance of antibiotics resistance (AR), and the effects of released leachate on the various environmental reservoirs and human health. Furthermore, the current review throws light on the source and fate of different ECs of landfill leachate and their possible impact on the nearby environments (groundwater, surface water, and soil) affecting human health. The present review strongly suggests the demand for future research focuses on the advancement of the removal efficiency of contaminants with the improvement of relevant landfill management to reduce the potential effects of disposable waste. We propose the necessity of the identification and monitoring of potential environmental and human health risks associated with landfill leachate contaminants.
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Chen Z, Wang H. Antibiotic Toxicity Profiles of Escherichia coli Strains Lacking DNA Methyltransferases. ACS OMEGA 2021; 6:7834-7840. [PMID: 33778295 PMCID: PMC7992158 DOI: 10.1021/acsomega.1c00378] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 03/04/2021] [Indexed: 05/05/2023]
Abstract
Antibiotic-resistant bacteria are causing more antibiotic treatment failures. Developing new antibiotics and identifying bacterial targets will help to mitigate the emergence and reduce the spread of antibiotic resistance in the environment. We investigated whether DNA methyltransferase (MTase) can be an adjunct target for improving antibiotic toxicity. We used Escherichia coli as an example. The genes encoding DNA adenine MTase and cytosine MTase, dam and dcm, respectively, were separately knocked out using the λRed system in E. coli MG1655. MG1655 and the two knockout strains were separately exposed in 96-well plates to 20 antibiotics from five classes. The EC50 values of almost all of the tested antibiotics were lower in the dam and dcm knockout lines than that of the control. Our statistical analysis showed that the variations observed in EC50 values were independent of the mechanism underlying each antibiotic's mechanistic action.
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Affiliation(s)
- Zheng Chen
- State
Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese
Academy of Sciences, Beijing 100085, China
- University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Hailin Wang
- State
Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese
Academy of Sciences, Beijing 100085, China
- University
of Chinese Academy of Sciences, Beijing 100049, China
- Institute
of Environment and Health, Jianghan University, Wuhan 430056, China
- . Phone/Fax: +86-10-62849600
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12
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Cyanobacterial blooms contribute to the diversity of antibiotic-resistance genes in aquatic ecosystems. Commun Biol 2020; 3:737. [PMID: 33277584 PMCID: PMC7718256 DOI: 10.1038/s42003-020-01468-1] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 10/07/2020] [Indexed: 12/17/2022] Open
Abstract
Cyanobacterial blooms are a global ecological problem that directly threatens human health and crop safety. Cyanobacteria have toxic effects on aquatic microorganisms, which could drive the selection for resistance genes. The effect of cyanobacterial blooms on the dispersal and abundance of antibiotic-resistance genes (ARGs) of concern to human health remains poorly known. We herein investigated the effect of cyanobacterial blooms on ARG composition in Lake Taihu, China. The numbers and relative abundances of total ARGs increased obviously during a Planktothrix bloom. More pathogenic microorganisms were present during this bloom than during a Planktothrix bloom or during the non-bloom period. Microcosmic experiments using additional aquatic ecosystems (an urban river and Lake West) found that a coculture of Microcystis aeruginosa and Planktothrix agardhii increased the richness of the bacterial community, because its phycosphere provided a richer microniche for bacterial colonization and growth. Antibiotic-resistance bacteria were naturally in a rich position, successfully increasing the momentum for the emergence and spread of ARGs. These results demonstrate that cyanobacterial blooms are a crucial driver of ARG diffusion and enrichment in freshwater, thus providing a reference for the ecology and evolution of ARGs and ARBs and for better assessing and managing water quality.
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Assessment of bacterial diversity and their antibiotic resistance profiles in wastewater treatment plants and their receiving Ganges River in Prayagraj (Allahabad), India. ACTA ACUST UNITED AC 2020. [DOI: 10.1007/s42535-020-00157-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Lu W, Wang M, Wu J, Jiang Q, Jin J, Jin Q, Yang W, Chen J, Wang Y, Xiao M. Spread of chloramphenicol and tetracycline resistance genes by plasmid mobilization in agricultural soil. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 260:113998. [PMID: 31991360 DOI: 10.1016/j.envpol.2020.113998] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 01/14/2020] [Accepted: 01/14/2020] [Indexed: 06/10/2023]
Abstract
Spread of antibiotic resistance genes (ARGs) poses a worldwide threat to public health and food safety. However, ARG spread by plasmid mobilization, a broad host range transfer system, in agricultural soil has received little attention. Here, we investigated the spread of chloramphenicol resistance gene (CRG) and tetracycline resistance gene (TRG) in agricultural soil by mobilization of pSUP106 under different conditions, including different concentrations of nutrients, temperatures, soil depths, rhizosphere soils, and soil types. The number of resistant bacteria isolated in non-sterilized soil from the experiments was approximately 104 to 107 per gram of soil, belonging to 5-10 species from four genera, including nonpathogen, opportunistic pathogen, pathogen bacteria, and gram-positive and gram-negative bacteria, depending on the experiment conditions. In sterilized soil, higher levels of nutrients and higher temperatures promoted plasmid mobilization and ARG expression. Topsoil and deep soil might not support the spread of antibiotic resistance, while ARG dissemination by plasmid mobilization was better supported by maize rhizosphere and loam soils. All these factors might change bacterial growth and the activity of bacteria and lead to the above influence. Introduction of only the donor and helper, or the donor alone also resulted in the transfer of ARGs and large numbers of antibiotic resistant bacteria (ARB), indicating that some indigenous bacteria contain the elements necessary for plasmid mobilization. Our results showed that plasmid mobilization facilitated dissemination of ARGs and ARB in soil, which led to the disturbance of indigenous bacterial communities. It is important to clear ARG dissemination routes and inhibit the spread of ARGs.
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Affiliation(s)
- Wenwei Lu
- Development Center of Plant Germplasm, College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Min Wang
- Shanghai Academy of Environmental Sciences, Shanghai, 200233, China
| | - Jianqiang Wu
- Shanghai Academy of Environmental Sciences, Shanghai, 200233, China
| | - Qiuyan Jiang
- Development Center of Plant Germplasm, College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Jieren Jin
- Development Center of Plant Germplasm, College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Qing Jin
- Development Center of Plant Germplasm, College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Wenwu Yang
- Development Center of Plant Germplasm, College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Jun Chen
- Development Center of Plant Germplasm, College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Yujing Wang
- Development Center of Plant Germplasm, College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Ming Xiao
- Development Center of Plant Germplasm, College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China; Key Laboratory of Urban Agriculture, Ministry of Agriculture, Shanghai, 200240, China.
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Grout L, Baker MG, French N, Hales S. A Review of Potential Public Health Impacts Associated With the Global Dairy Sector. GEOHEALTH 2020; 4:e2019GH000213. [PMID: 32159049 PMCID: PMC7017588 DOI: 10.1029/2019gh000213] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 12/18/2019] [Accepted: 12/20/2019] [Indexed: 05/04/2023]
Abstract
Strong demand for dairy products has led to a global increase in dairy production. In many parts of the world, dairy systems are undergoing rapid intensification. While increased production may contribute to food security, higher dairy stocking rates in some regions have resulted in increased pressure on natural resources with the potential to affect public health and wellbeing. The aim of this review was to identify and describe the potential health harms and benefits associated with dairy production and consumption. Electronic databases Medline, Embase, Scopus, Web of Science, PubMed, and Google Scholar were searched for published literature that investigated human health impacts of dairy production and consumption. Occupational hazards, environmental health impacts, ecosystem health impacts, foodborne hazards, and diet-related chronic diseases were identified as potential public health hazards. Some impacts, notably climate change, extend beyond directly exposed populations. Dairy production and consumption are also associated with important health benefits through the provision of nutrients and economic opportunities. As the global dairy sector increases production, exposure to a range of hazards must be weighed with these benefits. The review of impacts presented here can provide an input into decision making about optimal levels of dairy production and consumption, local land use, and identification and management of specific hazards from this sector. Future research should consider multiple exposure routes, socioeconomic implications, and environmental factors, particularly in regions heavily dependent on dairy farming.
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Affiliation(s)
- Leah Grout
- Department of Public HealthUniversity of OtagoWellingtonNew Zealand
| | - Michael G. Baker
- Department of Public HealthUniversity of OtagoWellingtonNew Zealand
| | - Nigel French
- School of Veterinary Science, Hopkirk Research InstituteMassey UniversityPalmerston NorthNew Zealand
| | - Simon Hales
- Department of Public HealthUniversity of OtagoWellingtonNew Zealand
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Kaushik M, Khare N, Kumar S, Gulati P. High Prevalence of Antibiotic Resistance and Integrons inEscherichia coliIsolated from Urban River Water, India. Microb Drug Resist 2019; 25:359-370. [DOI: 10.1089/mdr.2018.0194] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Affiliation(s)
- Megha Kaushik
- Medical Microbiology and Bioprocess Technology Laboratory, Department of Microbiology, Maharshi Dayanand University, Rohtak, India
| | - Neha Khare
- Medical Microbiology and Bioprocess Technology Laboratory, Department of Microbiology, Maharshi Dayanand University, Rohtak, India
| | - Sanjay Kumar
- Medical Microbiology and Bioprocess Technology Laboratory, Department of Microbiology, Maharshi Dayanand University, Rohtak, India
| | - Pooja Gulati
- Medical Microbiology and Bioprocess Technology Laboratory, Department of Microbiology, Maharshi Dayanand University, Rohtak, India
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