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Hu Z, Xu H, Cheng J, Zhang H, Zhao Y, Hu J, Sun Y, Huang L, Yao W, Yu Z, Xie Y. Catalyst-free regeneration of plasma-activated water via ultrasonic cavitation: Removing aggregation concealment of antibiotic-resistant bacteria with enhanced wastewater sustainability. JOURNAL OF HAZARDOUS MATERIALS 2024; 479:135705. [PMID: 39217933 DOI: 10.1016/j.jhazmat.2024.135705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2024] [Revised: 08/13/2024] [Accepted: 08/28/2024] [Indexed: 09/04/2024]
Abstract
Aggregation is a crucial factor in bacterial biofilm formation, and comprehending its properties is vital for managing waterborne antibiotic-resistant bacteria. In this study, we examined Methicillin-resistant Staphylococcus aureus (MRSA) cell aggregation under varying conditions and assessed the inactivation efficiency of a novel disinfection method, micro-nano bubbles plasma-activated water via ultrasonic stirring cavitation (MPAW-US), on aggregated MRSA cells. Aggregation efficiency increased over time and at low salt concentrations but diminished at higher concentrations. Elevated MRSA cell aggregation in actual water samples represented significant real-life biohazard risks. Unlike conventional disinfection, MPAW-US treatment exhibited minimal change in the inactivation rate constant despite protective outer layers. Enhanced inactivation efficiency results from the synergistic effects of increased intracellular oxidative stress damage and extracellular substance disruption, triggered by ultrasound-activated micro-nano bubbles that improve PAW reactivity and applicability. This approach neither induced MRSA cross-resistance to unfavorable conditions nor increased toxicity or regrowth potential of aggregative MRSA, utilizing ATP levels as potential regrowth capability indicators. Ultimately, this energy-efficient disinfection technology functions effectively across diverse temperature ranges, showcasing exceptional sterilization and nutritional bean sprout production after cyclic filtering, thereby promoting wastewater sustainability amidst carbon emission concerns.
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Affiliation(s)
- Zhenyang Hu
- State Key Laboratory of Food Science and Resources, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; School of Food Science and Technology, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, China
| | - Hongwen Xu
- State Key Laboratory of Food Science and Resources, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; School of Food Science and Technology, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, China
| | - Jun Cheng
- State Key Laboratory of Food Science and Resources, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; School of Food Science and Technology, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, China
| | - Huan Zhang
- State Key Laboratory of Food Science and Resources, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; School of Food Science and Technology, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, China
| | - Yali Zhao
- State Key Laboratory of Food Science and Resources, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; School of Food Science and Technology, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, China
| | - Jian Hu
- Key Laboratory of Chinese Cuisine Intangible Cultural Heritage Technology Inheritance, Ministry of Culture and Tourism, College of Tourism and Culinary Science, Yangzhou University, Yangzhou 225127, China
| | - Yingying Sun
- Research Institute, Centre Testing International Group Co., Ltd., Shenzhen 518000, China
| | - Lijun Huang
- Wuxi Food Safety Inspection and Test Center, 35-210 Changjiang South Road, Wuxi 214142, Jiangsu Province, China
| | - Weirong Yao
- State Key Laboratory of Food Science and Resources, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; School of Food Science and Technology, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, China
| | - Zhilong Yu
- State Key Laboratory of Food Science and Resources, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; School of Food Science and Technology, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, China
| | - Yunfei Xie
- State Key Laboratory of Food Science and Resources, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; School of Food Science and Technology, Jiangnan University, No.1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, China.
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2
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Quon H, Jiang S. Quantitative Microbial Risk Assessment of Antibiotic-Resistant E. coli, Legionella pneumophila, and Mycobacteria in Nonpotable Wastewater Reuse Applications. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:12888-12898. [PMID: 39004818 PMCID: PMC11270989 DOI: 10.1021/acs.est.4c01690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 07/03/2024] [Accepted: 07/05/2024] [Indexed: 07/16/2024]
Abstract
Antibiotic-resistant bacteria (ARB) have become a major threat to public health and modern medicine. A simple death kinetics-based dose-response model (SD-DRM) was incorporated into a quantitative microbial risk assessment (QMRA) to assess the risks of exposure to reclaimed wastewater harboring antibiotic-resistant E. coli, Legionella pneumophila, and Mycobacterium avium for multiple exposure scenarios. The fractions of ARB and trace antibiotics present in the body were incorporated to demonstrate their impact on infection risks. Both ARB and antibiotic susceptible bacteria, ASB, are assumed to have the same dose-response in the absence of antibiotics but behave differently in the presence of residual antibiotics in the body. Annual risk of L. pneumophila infection exceeded the EPA 10-4 pppy (per person per year) benchmark at concentrations in reclaimed water greater than 103-104 CFU/L, depending on parameter variation. Enteropathogenic E. coli infection risks meet the EPA annual benchmark at concentrations around 105-106 total E. coli. The results illustrated that an increase in residual antibiotics from 0 to 40% of the minimum inhibitory concentration (MIC) reduced the risk by about 1 order of magnitude for E. coli but was more likely to result in an untreatable infection.
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Affiliation(s)
- Hunter Quon
- Department of Civil and Environmental
Engineering, University of California, Irvine, California 92697-2175, United States
| | - Sunny Jiang
- Department of Civil and Environmental
Engineering, University of California, Irvine, California 92697-2175, United States
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Nahim-Granados S, Quon H, Polo-López MI, Oller I, Agüera A, Jiang S. Assessment of antibiotic-resistant infection risks associated with reclaimed wastewater irrigation in intensive tomato cultivation. WATER RESEARCH 2024; 254:121437. [PMID: 38479171 DOI: 10.1016/j.watres.2024.121437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 02/29/2024] [Accepted: 03/06/2024] [Indexed: 04/06/2024]
Abstract
Agricultural irrigation using reclaimed urban wastewater (RWW) represents a sustainable practice to meet the ever-increasing water stress in modern societies. However, the occurrence of residual antibiotics and antibiotic resistant bacteria (ARB) in RWW is an important human health concern. This study applied for the first time a novel Simple-Death dose-response model to the field data of Escherichia coli and Pseudomonas spp. collected from three greenhouses for cultivation of tomatoes irrigated with RWW. The model estimates the risk of infection by enteropathogenic E. coli associated with consumption of tomatoes and the risk of eye-infection caused by Pseudomonas aeruginosa in cultivation soil through hand-to-eye contacts. The fraction of antibiotic resistant (AR)-E. coli measured in irrigation water and AR-Pseudomonas spp. in soil was incorporated in the model to estimate the survival of ARB and antibiotic susceptible bacteria in the presence of trace level of antibiotics in human body. The results showed that the risk of E. coli infection through consumption of tomatoes irrigated with RWW is within the WHO and USEPA recommended risk threshold (<10-4); Pseudomonas aeruginosa eye-infection risk is at or below the acceptable risk level. The presence of residual antibiotic in human body reduced the overall risk probabilities of infections but selectively enhanced the survival of ARB in comparison to their susceptible counterparts, which resulted in antibiotic untreatable infection. Therefore, the outcomes of this study call for a new risk threshold for antibiotic untreatable infections and highlight the key importance of adopting work safety measures for better human health protection.
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Affiliation(s)
- Samira Nahim-Granados
- CIEMAT-Plataforma Solar de Almería, Ctra. Senés km 4, Tabernas, Almería 04200, Spain; Department of Civil and Environmental Engineering, University of California, Irvine, CA 92697-2175, USA; CIESOL, Joint Centre of the University of Almería-CIEMAT, Almería 04120, Spain.
| | - Hunter Quon
- Department of Civil and Environmental Engineering, University of California, Irvine, CA 92697-2175, USA
| | - María Inmaculada Polo-López
- CIEMAT-Plataforma Solar de Almería, Ctra. Senés km 4, Tabernas, Almería 04200, Spain; CIESOL, Joint Centre of the University of Almería-CIEMAT, Almería 04120, Spain
| | - Isabel Oller
- CIEMAT-Plataforma Solar de Almería, Ctra. Senés km 4, Tabernas, Almería 04200, Spain; CIESOL, Joint Centre of the University of Almería-CIEMAT, Almería 04120, Spain
| | - Ana Agüera
- CIEMAT-Plataforma Solar de Almería, Ctra. Senés km 4, Tabernas, Almería 04200, Spain; CIESOL, Joint Centre of the University of Almería-CIEMAT, Almería 04120, Spain
| | - Sunny Jiang
- Department of Civil and Environmental Engineering, University of California, Irvine, CA 92697-2175, USA.
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4
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Burch TR, Stokdyk JP, Durso LM, Borchardt MA. Quantitative microbial risk assessment for ingestion of antibiotic resistance genes from private wells contaminated by human and livestock fecal sources. Appl Environ Microbiol 2024; 90:e0162923. [PMID: 38335112 PMCID: PMC10952444 DOI: 10.1128/aem.01629-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 01/16/2024] [Indexed: 02/12/2024] Open
Abstract
We used quantitative microbial risk assessment to estimate ingestion risk for intI1, erm(B), sul1, tet(A), tet(W), and tet(X) in private wells contaminated by human and/or livestock feces. Genes were quantified with five human-specific and six bovine-specific microbial source-tracking (MST) markers in 138 well-water samples from a rural Wisconsin county. Daily ingestion risk (probability of swallowing ≥1 gene) was based on daily water consumption and a Poisson exposure model. Calculations were stratified by MST source and soil depth over the aquifer where wells were drilled. Relative ingestion risk was estimated using wells with no MST detections and >6.1 m soil depth as a referent category. Daily ingestion risk varied from 0 to 8.8 × 10-1 by gene and fecal source (i.e., human or bovine). The estimated number of residents ingesting target genes from private wells varied from 910 (tet(A)) to 1,500 (intI1 and tet(X)) per day out of 12,000 total. Relative risk of tet(A) ingestion was significantly higher in wells with MST markers detected, including wells with ≤6.1 m soil depth contaminated by bovine markers (2.2 [90% CI: 1.1-4.7]), wells with >6.1 m soil depth contaminated by bovine markers (1.8 [1.002-3.9]), and wells with ≤6.1 m soil depth contaminated by bovine and human markers simultaneously (3.1 [1.7-6.5]). Antibiotic resistance genes (ARGs) were not necessarily present in viable microorganisms, and ingestion is not directly associated with infection. However, results illustrate relative contributions of human and livestock fecal sources to ARG exposure and highlight rural groundwater as a significant point of exposure.IMPORTANCEAntibiotic resistance is a global public health challenge with well-known environmental dimensions, but quantitative analyses of the roles played by various natural environments in transmission of antibiotic resistance are lacking, particularly for drinking water. This study assesses risk of ingestion for several antibiotic resistance genes (ARGs) and the class 1 integron gene (intI1) in drinking water from private wells in a rural area of northeast Wisconsin, United States. Results allow comparison of drinking water as an exposure route for antibiotic resistance relative to other routes like food and recreational water. They also enable a comparison of the importance of human versus livestock fecal sources in the study area. Our study demonstrates the previously unrecognized importance of untreated rural drinking water as an exposure route for antibiotic resistance and identifies bovine fecal material as an important exposure factor in the study setting.
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Affiliation(s)
- Tucker R. Burch
- U.S. Department of Agriculture-Agricultural Research Service, Environmentally Integrated Dairy Management Research Unit, Marshfield, Wisconsin, USA
- U.S. Geological Survey and U.S. Department of Agriculture-Agricultural Research Service, Laboratory for Infectious Disease and the Environment, Marshfield, Wisconsin, USA
| | - Joel P. Stokdyk
- U.S. Geological Survey and U.S. Department of Agriculture-Agricultural Research Service, Laboratory for Infectious Disease and the Environment, Marshfield, Wisconsin, USA
- U.S. Geological Survey, Upper Midwest Water Science Center, Marshfield, Wisconsin, USA
| | - Lisa M. Durso
- U.S. Department of Agriculture-Agricultural Research Service, Agroecosystem Management Research Unit, Lincoln, Nebraska, USA
| | - Mark A. Borchardt
- U.S. Department of Agriculture-Agricultural Research Service, Environmentally Integrated Dairy Management Research Unit, Marshfield, Wisconsin, USA
- U.S. Geological Survey and U.S. Department of Agriculture-Agricultural Research Service, Laboratory for Infectious Disease and the Environment, Marshfield, Wisconsin, USA
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5
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Stanton IC, Tipper HJ, Chau K, Klümper U, Subirats J, Murray AK. Does Environmental Exposure to Pharmaceutical and Personal Care Product Residues Result in the Selection of Antimicrobial-Resistant Microorganisms, and is this Important in Terms of Human Health Outcomes? ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2024; 43:623-636. [PMID: 36416260 DOI: 10.1002/etc.5498] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/14/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
The environment plays a critical role in the development, dissemination, and transmission of antimicrobial resistance (AMR). Pharmaceuticals and personal care products (PPCPs) enter the environment through direct application to the environment and through anthropogenic pollution. Although there is a growing body of evidence defining minimal selective concentrations (MSCs) of antibiotics and the role antibiotics play in horizontal gene transfer (HGT), there is limited evidence on the role of non-antibiotic PPCPs. Existing data show associations with the development of resistance or effects on bacterial growth rather than calculating selective endpoints. Research has focused on laboratory-based systems rather than in situ experiments, although PPCP concentrations found throughout wastewater, natural water, and soil environments are often within the range of laboratory-derived MSCs and at concentrations shown to promote HGT. Increased selection and HGT of AMR by PPCPs will result in an increase in total AMR abundance in the environment, increasing the risk of exposure and potential transmission of environmental AMR to humans. There is some evidence to suggest that humans can acquire resistance from environmental settings, with water environments being the most frequently studied. However, because this is currently limited, we recommend that more evidence be gathered to understand the risk the environment plays in regard to human health. In addition, we recommend that future research efforts focus on MSC-based experiments for non-antibiotic PPCPS, particularly in situ, and investigate the effect of PPCP mixtures on AMR. Environ Toxicol Chem 2024;43:623-636. © 2022 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
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Affiliation(s)
| | | | - Kevin Chau
- Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Uli Klümper
- Institute of Hydrobiology, Technische Universitӓt Dresden, Dresden, Germany
| | - Jessica Subirats
- Institute of Environmental Assessment and Water Research, Spanish Council for Scientific Research (IDAEA-CSIC), Barcelona, Spain
| | - Aimee K Murray
- College of Medicine and Health, University of Exeter, Cornwall, UK
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Kujat Choy S, Neumann EM, Romero-Barrios P, Tamber S. Contribution of Food to the Human Health Burden of Antimicrobial Resistance. Foodborne Pathog Dis 2024; 21:71-82. [PMID: 38099924 PMCID: PMC10877391 DOI: 10.1089/fpd.2023.0099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024] Open
Abstract
The impact of foodborne antimicrobial resistance (AMR) on the human health burden of AMR infections is unknown. The aim of this review was to evaluate and summarize the scientific literature investigating all potential sources of human AMR infections related to food. A literature search was conducted in Embase (Ovid) and MEDLINE (Ovid) databases to identify appropriate studies published between 2010 and 2023. The results of the search were reviewed and categorized based on the primary subject matter. Key concepts from each category are described from the perspective of food safety as a public health objective. The search yielded 3457 references, 1921 remained after removal of duplicates, abstracts, editorials, comments, notes, retractions, and errata. No properly designed source attribution studies were identified, but 383 journal articles were considered relevant and were classified into eight subcategories and discussed in the context of four streams of evidence: prevalence data, epidemiological studies, outbreak investigations and human health impact estimates. There was sufficient evidence to conclude that AMR genes, whether present in pathogenic or nonpathogenic bacteria, constitute a foodborne hazard. The level of consumer risk owing to this hazard cannot be accurately estimated based on the data summarized here. Key gaps in the literature are noted.
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Affiliation(s)
- Sonya Kujat Choy
- Bureau of Microbial Hazards, Health Products and Food Branch, Health Canada, Ottawa, Canada
| | - Eva-Marie Neumann
- Library Services Division, Corporate Services Branch, Health Canada, Ottawa, Canada
| | - Pablo Romero-Barrios
- Bureau of Microbial Hazards, Health Products and Food Branch, Health Canada, Ottawa, Canada
| | - Sandeep Tamber
- Bureau of Microbial Hazards, Health Products and Food Branch, Health Canada, Ottawa, Canada
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7
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Castello A, Lo Cascio G, Ferraro C, Pantano L, Costa A, Butera G, Oliveri G, Rizzuto ML, Alduina R, Cardamone C. Food risk associated with vegetable consumption, exposure to antimicrobial-resistant strains and pesticide residues. Ital J Food Saf 2023; 12:11134. [PMID: 37405150 PMCID: PMC10316261 DOI: 10.4081/ijfs.2023.11134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 03/13/2023] [Indexed: 07/06/2023] Open
Abstract
This preliminary study aimed to detect biological and chemical contaminants in vegetables sold in Sicily for human consumption, assess the spread of antimicrobial-resistant (AMR) strains in these foods, and characterize their antimicrobial-resistance genes. A total of 29 fresh and ready-to-eat samples were analyzed. Microbiological analyses were performed for the detection of Salmonella spp. and the enumeration of Enterococci, Enterobacteriaceae, and Escherichia coli. Antimicrobial resistance was assessed by the Kirby-Bauer method, according to the Clinical and Laboratory Standards Institute guidelines. Pesticides were detected by high-performance liquid chromatography and gas chromatography coupled with mass spectrometry. No samples were contaminated by Salmonella spp., E. coli was detected in 1 sample of fresh lettuce at a low bacterial count (2 log cfu/g). 17.24% of vegetables were contaminated by Enterococci and 65.5% by Enterobacteriaceae (bacterial counts between 1.56 log cfu/g and 5.93 log cfu/g and between 1.6 log cfu/g and 5.48 log cfu/g respectively). From 86.2% of vegetables, 53 AMR strains were isolated, and 10/53 isolates were multidrug resistant. Molecular analysis showed that the blaTEM gene was detected in 12/38 β-lactam-resistant/intermediate-resistant isolates. Genes conferring tetracycline resistance (tetA, tetB, tetC, tetD, tetW) were detected in 7/10 isolates. The qnrS gene was detected in 1/5 quinolone-resistant isolates, the sulI gene was detected in 1/4 sulfonamide- resistant/intermediate-resistant isolates and the sulIII gene was never detected. Pesticides were detected in 27.3% of samples, all of which were leafy vegetables. Despite the satisfactory hygienic status of samples, the high percentage of AMR bacteria detected stresses the need for an effective monitoring of these foods as well as adequate strategies to counteract the spread of AMR bacteria along the agricultural chain. Also, the chemical contamination of vegetables should not be underestimated, especially considering that leafy vegetables are commonly consumed raw and that no official guidelines about maximum residue limits of pesticides in ready-to-eat vegetables are available.
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Affiliation(s)
- Annamaria Castello
- Food Microbiology Section, Experimental Zooprophylactic Institute of Sicily A. Mirri, Palermo
| | - Giovanni Lo Cascio
- Food Chemistry Section, Experimental Zooprophylactic Institute of Sicily A. Mirri, Palermo
| | - Clelia Ferraro
- Biological, Chemical and Pharmaceutical Sciences and Technologies Department, University of Palermo, Italy
| | - Licia Pantano
- Food Chemistry Section, Experimental Zooprophylactic Institute of Sicily A. Mirri, Palermo
| | - Antonella Costa
- Food Microbiology Section, Experimental Zooprophylactic Institute of Sicily A. Mirri, Palermo
| | - Gaspare Butera
- Food Microbiology Section, Experimental Zooprophylactic Institute of Sicily A. Mirri, Palermo
| | - Giuseppa Oliveri
- Food Microbiology Section, Experimental Zooprophylactic Institute of Sicily A. Mirri, Palermo
| | - Maria Laura Rizzuto
- Food Microbiology Section, Experimental Zooprophylactic Institute of Sicily A. Mirri, Palermo
| | - Rosa Alduina
- Biological, Chemical and Pharmaceutical Sciences and Technologies Department, University of Palermo, Italy
| | - Cinzia Cardamone
- Food Microbiology Section, Experimental Zooprophylactic Institute of Sicily A. Mirri, Palermo
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8
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Antunes L, João AL, Nunes T, Henriques AR. Burden of disease estimation based on Escherichia coli quantification in ready-to-eat meals served in Portuguese institutional canteens. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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9
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Examining market and weather events as signals of an increased probability of Shiga toxin-producing Escherichia coli outbreaks linked to romaine lettuce. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.109479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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10
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Zhou Y, Wan Q, Bao H, Guo Y, Zhu S, Zhang H, Pang M, Wang R. Application of a novel lytic phage vB_EcoM_SQ17 for the biocontrol of Enterohemorrhagic Escherichia coli O157:H7 and Enterotoxigenic E. coli in food matrices. Front Microbiol 2022; 13:929005. [PMID: 35992713 PMCID: PMC9389114 DOI: 10.3389/fmicb.2022.929005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 07/05/2022] [Indexed: 11/16/2022] Open
Abstract
Enterohemorrhagic Escherichia coli (EHEC) O157:H7 and Enterotoxigenic E. coli (ETEC) are important foodborne pathogens, causing serious food poisoning outbreaks worldwide. Bacteriophages, as novel antibacterial agents, have been increasingly exploited to control foodborne pathogens. In this study, a novel broad-host range lytic phage vB_EcoM_SQ17 (SQ17), was isolated, characterized, and evaluated for its potential to control bacterial counts in vitro and in three different food matrices (milk, raw beef, and fresh lettuce). Phage SQ17 was capable of infecting EHEC O157:H7, ETEC, and other E. coli strains. Morphology, one-step growth, and stability assay showed that phage SQ17 belongs to the Caudovirales order, Myoviridae family, and Mosigvirus genus. It has a short latent period of 10 min, a burst size of 71 PFU/infected cell, high stability between pH 4 to 12 as well as thermostability between 30°C and 60°C for 60 min. Genome sequencing analysis revealed that the genome of SQ17 does not contain any genes associated with antibiotic resistance, toxins, lysogeny, or virulence factors, indicating the potential safe application of phage SQ17 in the food industry. In Luria-Bertani (LB) medium, phage SQ17 significantly decreased the viable counts of EHEC O157:H7 by more than 2.40 log CFU/ml (p < 0.05) after 6 h of incubation at 37°C. Phage SQ17 showed great potential to be applied for biocontrol of EHEC O157:H7 in milk and raw beef. In fresh lettuce, treatment with SQ17 also resulted in significant reduction of viable cell counts of EHEC O157:H7 and ETEC at both 4°C and 25°C. Our results demonstrate that SQ17 is a good candidate for application as an EHEC O157:H7 and ETEC biocontrol agent in the processing stages of food production and food preservation.
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Affiliation(s)
- Yan Zhou
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- *Correspondence: Yan Zhou,
| | - Qiyang Wan
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Hongduo Bao
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Yonghao Guo
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Shujiao Zhu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Hui Zhang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Maoda Pang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Ran Wang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- Ran Wang,
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11
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Godijk NG, Bootsma MCJ, Bonten MJM. Transmission routes of antibiotic resistant bacteria: a systematic review. BMC Infect Dis 2022; 22:482. [PMID: 35596134 PMCID: PMC9123679 DOI: 10.1186/s12879-022-07360-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 03/28/2022] [Indexed: 11/16/2022] Open
Abstract
Background Quantification of acquisition routes of antibiotic resistant bacteria (ARB) is pivotal for understanding transmission dynamics and designing cost-effective interventions. Different methods have been used to quantify the importance of transmission routes, such as relative risks, odds ratios (OR), genomic comparisons and basic reproduction numbers. We systematically reviewed reported estimates on acquisition routes’ contributions of ARB in humans, animals, water and the environment and assessed the methods used to quantify the importance of transmission routes. Methods PubMed and EMBASE were searched, resulting in 6054 articles published up until January 1st, 2019. Full text screening was performed on 525 articles and 277 are included. Results We extracted 718 estimates with S. aureus (n = 273), E. coli (n = 157) and Enterobacteriaceae (n = 99) being studied most frequently. Most estimates were derived from statistical methods (n = 560), mainly expressed as risks (n = 246) and ORs (n = 239), followed by genetic comparisons (n = 85), modelling (n = 62) and dosage of ARB ingested (n = 17). Transmission routes analysed most frequently were occupational exposure (n = 157), travelling (n = 110) and contacts with carriers (n = 83). Studies were mostly performed in the United States (n = 142), the Netherlands (n = 87) and Germany (n = 60). Comparison of methods was not possible as studies using different methods to estimate the same route were lacking. Due to study heterogeneity not all estimates by the same method could be pooled. Conclusion Despite an abundance of published data the relative importance of transmission routes of ARB has not been accurately quantified. Links between exposure and acquisition are often present, but the frequency of exposure is missing, which disables estimation of transmission routes’ importance. To create effective policies reducing ARB, estimates of transmission should be weighed by the frequency of exposure occurrence. Supplementary Information The online version contains supplementary material available at 10.1186/s12879-022-07360-z.
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Affiliation(s)
- Noortje G Godijk
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.
| | - Martin C J Bootsma
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Mathematics, Faculty of Sciences, Utrecht University, Utrecht, The Netherlands
| | - Marc J M Bonten
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
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Stanton IC, Bethel A, Leonard AFC, Gaze WH, Garside R. Existing evidence on antibiotic resistance exposure and transmission to humans from the environment: a systematic map. ENVIRONMENTAL EVIDENCE 2022; 11:8. [PMID: 35308196 PMCID: PMC8917330 DOI: 10.1186/s13750-022-00262-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 02/24/2022] [Indexed: 05/29/2023]
Abstract
BACKGROUND Antimicrobial resistance (AMR) is predicted to become the leading cause of death by 2050 with antibiotic resistance being an important component. Anthropogenic pollution introduces antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs) to the natural environment. Currently, there is limited empirical evidence demonstrating whether humans are exposed to environmental AMR and whether this exposure can result in measurable human health outcomes. In recent years there has been increasing interest in the role of the environment and disparate evidence on transmission of AMR to humans has been generated but there has been no systematic attempt to summarise this. We aim to create two systematic maps that will collate the evidence for (1) the transmission of antibiotic resistance from the natural environment to humans on a global scale and (2) the state of antibiotic resistance in the environment in the United Kingdom. METHODS Search strategies were developed for each map. Searches were undertaken in 13 bibliographic databases. Key websites were searched and experts consulted for grey literature. Search results were managed using EndNote X8. Titles and abstracts were screened, followed by the full texts. Articles were double screened at a minimum of 10% at both stages with consistency checking and discussion when disagreements arose. Data extraction occurred in Excel with bespoke forms designed. Data extracted from each selected study included: bibliographic information; study site location; exposure source; exposure route; human health outcome (Map 1); prevalence/percentage/abundance of ARB/antibiotic resistance elements (Map 2) and study design. EviAtlas was used to visualise outputs. RESULTS For Map 1, 40 articles were included, from 11,016 unique articles identified in searches, which investigated transmission of AMR from the environment to humans. Results from Map 1 showed that consumption/ingestion was the most studied transmission route. Exposure (n = 17), infection (n = 16) and colonisation (n = 11) being studied as an outcome a similar number of times, with mortality studied infrequently (n = 2). In addition, E. coli was the most highly studied bacterium (n = 16). For Map 2, we included 62 studies quantifying ARB or resistance elements in the environment in the UK, from 6874 unique articles were identified in the searches. The most highly researched species was mixed communities (n = 32). The most common methodology employed in this research question was phenotypic testing (n = 37). The most commonly reported outcome was the characterisation of ARBs (n = 40), followed by characterisation of ARGs (n = 35). Other genetic elements, such as screening for intI1 (n = 15) (which encodes a Class 1 integron which is used as a proxy for environmental ARGs) and point mutations (n = 1) were less frequently reported. Both maps showed that research was focused towards aquatic environments. CONCLUSIONS Both maps can be used by policy makers to show the global (Map 1) and UK (Map 2) research landscapes and provide an overview of the state of AMR in the environment and human health impacts of interacting with the environment. We have also identified (1) clusters of research which may be used to perform meta-analyses and (2) gaps in the evidence base where future primary research should focus. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1186/s13750-022-00262-2.
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Affiliation(s)
- Isobel Catherine Stanton
- European Centre for Environment and Human Health, College of Medicine and Health, Penryn Campus, University of Exeter, Penryn, TR10 9FE UK
| | - Alison Bethel
- College of Medicine and Health, St Luke’s Campus, University of Exeter, Exeter, EX1 1TX UK
| | - Anne Frances Clare Leonard
- European Centre for Environment and Human Health, College of Medicine and Health, Penryn Campus, University of Exeter, Penryn, TR10 9FE UK
| | - William Hugo Gaze
- European Centre for Environment and Human Health, College of Medicine and Health, Penryn Campus, University of Exeter, Penryn, TR10 9FE UK
| | - Ruth Garside
- European Centre for Environment and Human Health, College of Medicine and Health, Knowledge Spa, University of Exeter, Truro, TR1 3HD UK
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Brunn A, Kadri-Alabi Z, Moodley A, Guardabassi L, Taylor P, Mateus A, Waage J. Characteristics and Global Occurrence of Human Pathogens Harboring Antimicrobial Resistance in Food Crops: A Scoping Review. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2022. [DOI: 10.3389/fsufs.2022.824714] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
BackgroundThe role of the crop environment as a conduit for antimicrobial resistance (AMR) through soil, water, and plants has received less attention than other sectors. Food crops may provide a link between the agro-environmental reservoir of AMR and acquisition by humans, adding to existing food safety hazards associated with microbial contamination of food crops.ObjectivesThe objectives of this review were: (1) to use a systematic methodology to characterize AMR in food crop value chains globally, and (2) to identify knowledge gaps in understanding exposure risks to humans.MethodsFour bibliographic databases were searched using synonyms of AMR in food crop value chains. Following two-stage screening, phenotypic results were extracted and categorized into primary and secondary combinations of acquired resistance in microbes of concern based on established prioritization. Occurrence of these pathogen-AMR phenotype combinations were summarized by sample group, value chain stage, and world region. Sub-analyses on antimicrobial resistance genes (ARG) focused on extended-spectrum beta-lactamase and tetracycline resistance genes.ResultsScreening of 4,455 citations yielded 196 studies originating from 49 countries, predominantly in Asia (89 studies) and Africa (38). Observations of pathogen-phenotype combinations of interest were reported in a subset of 133 studies (68%). Primary combinations, which include resistance to antimicrobials of critical importance to human medicine varied from 3% (carbapenem resistance) to 13% (fluoroquinolones), whereas secondary combinations, which include resistance to antimicrobials also used in agriculture ranged from 14% (aminoglycoside resistance) to 20% (aminopenicillins). Salad crops, vegetables, and culinary herbs were the most sampled crops with almost twice as many studies testing post-harvest samples. Sub-analysis of ARG found similar patterns corresponding to phenotypic results.DiscussionThese results suggest that acquired AMR in opportunistic and obligate human pathogens is disseminated throughout food crop value chains in multiple world regions. However, few longitudinal studies exist and substantial heterogeneity in sampling methods currently limit quantification of exposure risks to consumers. This review highlights the need to include agriculturally-derived AMR in monitoring food safety risks from plant-based foods, and the challenges facing its surveillance.
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Baghal Asghari F, Dehghani MH, Dehghanzadeh R, Farajzadeh D, Shanehbandi D, Mahvi AH, Yaghmaeian K, Rajabi A. Performance evaluation of ozonation for removal of antibiotic-resistant Escherichia coli and Pseudomonas aeruginosa and genes from hospital wastewater. Sci Rep 2021; 11:24519. [PMID: 34972828 PMCID: PMC8720092 DOI: 10.1038/s41598-021-04254-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Accepted: 12/20/2021] [Indexed: 02/06/2023] Open
Abstract
The performance of ozonation for the removal of antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARGs) using Escherichia coli and Pseudomonas aeruginosa carrying ARGs from hospital wastewaters was evaluated in this study. Bacterial inactivation was determined using plate count methods and real time PCR for ARG damage (Sul1, blatem, blactx, blavim and qnrS). The reduction rate of bacterial cells and ARGs was increased by different amounts of transferred ozone dose from 11 to 45 mg/L. The concentration of 108 cfu/ml bacteria was reduced to an acceptable level by ozone treatment after a 5 min contact time, Although the removal rate was much higher for concentrations of 106 cfu/ml and 104 cfu/ml bacteria. Overall, the tendency of gene reduction by ozonation from more to less was 16S rRNA > sul1 > blatem > blactx > qnrS > blavim. Given that plasmid-borne ARGs can potentially be transferred to other bacteria even after the disinfection process, our results can provide important insights into the fate of ARGs during hospital wastewater ozonation.
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Affiliation(s)
- Farzaneh Baghal Asghari
- grid.411705.60000 0001 0166 0922Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Hadi Dehghani
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. .,Institute for Environmental Research, Center for Solid Waste Research, Tehran University of Medical Sciences, Tehran, Iran. .,Institute for Environmental Research, Center for Water Quality Research, Tehran University of Medical Sciences, Tehran, Iran.
| | - Reza Dehghanzadeh
- Health and Environment Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Davoud Farajzadeh
- grid.411468.e0000 0004 0417 5692Department of Cellular and Molecular Biology, Faculty of Biological Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Dariush Shanehbandi
- grid.412888.f0000 0001 2174 8913Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir Hossein Mahvi
- grid.411705.60000 0001 0166 0922Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Institute for Environmental Research, Center for Solid Waste Research, Tehran University of Medical Sciences, Tehran, Iran
| | - Kamyar Yaghmaeian
- grid.411705.60000 0001 0166 0922Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Akbar Rajabi
- grid.412888.f0000 0001 2174 8913 Health and Environment Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Rahman M, Alam MU, Luies SK, Kamal A, Ferdous S, Lin A, Sharior F, Khan R, Rahman Z, Parvez SM, Amin N, Hasan R, Tadesse BT, Taneja N, Islam MA, Ercumen A. Contamination of Fresh Produce with Antibiotic-Resistant Bacteria and Associated Risks to Human Health: A Scoping Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 19:360. [PMID: 35010620 PMCID: PMC8744955 DOI: 10.3390/ijerph19010360] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 12/19/2021] [Accepted: 12/22/2021] [Indexed: 02/06/2023]
Abstract
Fresh produce, when consumed raw, can be a source of exposure to antimicrobial residues, antimicrobial-resistant bacteria (ARB) and antimicrobial resistance genes (ARGs) of clinical importance. This review aims to determine: (1) the presence and abundance of antimicrobial residues, ARB and ARGs in fresh agricultural products sold in retail markets and consumed raw; (2) associated health risks in humans; and (3) pathways through which fresh produce becomes contaminated with ARB/ARGs. We searched the Ovid Medline, Web of Science and Hinari databases as well as grey literature, and identified 40 articles for inclusion. All studies investigated the occurrence of multidrug-resistant bacteria, and ten studies focused on ARGs in fresh produce, while none investigated antimicrobial residues. The most commonly observed ARB were E. coli (42.5%) followed by Klebsiella spp. (22.5%), and Salmonella spp. (20%), mainly detected on lettuce. Twenty-five articles mentioned health risks from consuming fresh produce but none quantified the risk. About half of the articles stated produce contamination occurred during pre- and post-harvest processes. Our review indicates that good agricultural and manufacturing practices, behavioural change communication and awareness-raising programs are required for all stakeholders along the food production and consumption supply chain to prevent ARB/ARG exposure through produce.
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Affiliation(s)
- Mahbubur Rahman
- Environmental Interventions Unit, Infectious Disease Division, International Centre for Diarrhoeal Disease Research, Dhaka 1212, Bangladesh; (M.-U.A.); (S.K.L.); (A.K.); (S.F.); (F.S.); (R.K.); (Z.R.); (S.M.P.); (N.A.); (R.H.)
| | - Mahbub-Ul Alam
- Environmental Interventions Unit, Infectious Disease Division, International Centre for Diarrhoeal Disease Research, Dhaka 1212, Bangladesh; (M.-U.A.); (S.K.L.); (A.K.); (S.F.); (F.S.); (R.K.); (Z.R.); (S.M.P.); (N.A.); (R.H.)
| | - Sharmin Khan Luies
- Environmental Interventions Unit, Infectious Disease Division, International Centre for Diarrhoeal Disease Research, Dhaka 1212, Bangladesh; (M.-U.A.); (S.K.L.); (A.K.); (S.F.); (F.S.); (R.K.); (Z.R.); (S.M.P.); (N.A.); (R.H.)
| | - Abul Kamal
- Environmental Interventions Unit, Infectious Disease Division, International Centre for Diarrhoeal Disease Research, Dhaka 1212, Bangladesh; (M.-U.A.); (S.K.L.); (A.K.); (S.F.); (F.S.); (R.K.); (Z.R.); (S.M.P.); (N.A.); (R.H.)
| | - Sharika Ferdous
- Environmental Interventions Unit, Infectious Disease Division, International Centre for Diarrhoeal Disease Research, Dhaka 1212, Bangladesh; (M.-U.A.); (S.K.L.); (A.K.); (S.F.); (F.S.); (R.K.); (Z.R.); (S.M.P.); (N.A.); (R.H.)
| | - Audrie Lin
- Berkeley’s School of Public Health, University of California Berkeley, Berkeley, CA 94720, USA;
| | - Fazle Sharior
- Environmental Interventions Unit, Infectious Disease Division, International Centre for Diarrhoeal Disease Research, Dhaka 1212, Bangladesh; (M.-U.A.); (S.K.L.); (A.K.); (S.F.); (F.S.); (R.K.); (Z.R.); (S.M.P.); (N.A.); (R.H.)
| | - Rizwana Khan
- Environmental Interventions Unit, Infectious Disease Division, International Centre for Diarrhoeal Disease Research, Dhaka 1212, Bangladesh; (M.-U.A.); (S.K.L.); (A.K.); (S.F.); (F.S.); (R.K.); (Z.R.); (S.M.P.); (N.A.); (R.H.)
| | - Ziaur Rahman
- Environmental Interventions Unit, Infectious Disease Division, International Centre for Diarrhoeal Disease Research, Dhaka 1212, Bangladesh; (M.-U.A.); (S.K.L.); (A.K.); (S.F.); (F.S.); (R.K.); (Z.R.); (S.M.P.); (N.A.); (R.H.)
| | - Sarker Masud Parvez
- Environmental Interventions Unit, Infectious Disease Division, International Centre for Diarrhoeal Disease Research, Dhaka 1212, Bangladesh; (M.-U.A.); (S.K.L.); (A.K.); (S.F.); (F.S.); (R.K.); (Z.R.); (S.M.P.); (N.A.); (R.H.)
- Faculty of Medicine, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Nuhu Amin
- Environmental Interventions Unit, Infectious Disease Division, International Centre for Diarrhoeal Disease Research, Dhaka 1212, Bangladesh; (M.-U.A.); (S.K.L.); (A.K.); (S.F.); (F.S.); (R.K.); (Z.R.); (S.M.P.); (N.A.); (R.H.)
- Institute for Sustainable Futures, University of Technology Sydney, 235 Jones St., Ultimo, NSW 2007, Australia
| | - Rezaul Hasan
- Environmental Interventions Unit, Infectious Disease Division, International Centre for Diarrhoeal Disease Research, Dhaka 1212, Bangladesh; (M.-U.A.); (S.K.L.); (A.K.); (S.F.); (F.S.); (R.K.); (Z.R.); (S.M.P.); (N.A.); (R.H.)
| | - Birkneh Tilahun Tadesse
- School of Medicine, Hawassa University, Shashemene, Awassa P.O. Box 5, Ethiopia;
- International Vaccine Institute, SNU Research Park, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
| | - Neelam Taneja
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Chandigarh 160012, India;
| | - Mohammad Aminul Islam
- Allen Center, Paul G. Allen School for Global Health, Washington State University, 240 SE Ott Road, Pullman, WA 99164, USA;
| | - Ayse Ercumen
- Department of Forestry and Environmental Resources, North Carolina State University, 2800 Faucette Drive, 3120 Jordan Hall, Raleigh, NC 27607, USA;
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Zhang S, Abbas M, Rehman MU, Wang M, Jia R, Chen S, Liu M, Zhu D, Zhao X, Gao Q, Tian B, Cheng A. Updates on the global dissemination of colistin-resistant Escherichia coli: An emerging threat to public health. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 799:149280. [PMID: 34364270 DOI: 10.1016/j.scitotenv.2021.149280] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/22/2021] [Accepted: 07/22/2021] [Indexed: 06/13/2023]
Abstract
Colistin drug resistance is an emerging public health threat worldwide. The adaptability, existence and spread of colistin drug resistance in multiple reservoirs and ecological environmental settings is significantly increasing the rate of occurrence of multidrug resistant (MDR) bacteria such as Escherichia coli (E. coli). Here, we summarized the reports regarding molecular and biological characterization of mobile colistin resistance gene (mcr)-positive E. coli (MCRPEC), originating from diverse reservoirs, including but not limited to humans, environment, waste water treatment plants, wild, pets, and food producing animals. The MCRPEC revealed the abundance of clinically important resistance genes, which are responsible for MDR profile. A number of plasmid replicon types such as IncI2, IncX4, IncP, IncX, and IncFII with a predominance of IncI2 were facilitating the spread of colistin resistance. This study concludes the distribution of multiple sequence types of E. coli carrying mcr gene variants, which are possible threat to "One Health" perspective. In addition, we have briefly explained the newly known mechanisms of colistin resistance i.e. plasmid-encoded resistance determinant as well as presented the chromosomally-encoded resistance mechanisms. The transposition of ISApl1 into the chromosome and existence of intact Tn6330 are important for transmission and stability for mcr gene. Further, genetic environment of co-localized mcr gene with carbapenem-resistance or extended-spectrum β-lactamases genes has also been elaborated, which is limiting human beings to choose last resort antibiotics. Finally, environmental health and safety control measures along with spread mechanisms of mcr genes are discussed to avoid further propagation and environmental hazards of colistin resistance.
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Affiliation(s)
- Shaqiu Zhang
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, PR China
| | - Muhammad Abbas
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, PR China; Livestock and Dairy Development Department Lahore, Punjab 54000, Pakistan
| | - Mujeeb Ur Rehman
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, PR China; Disease Investigation Laboratory, Livestock & Dairy Development Department, Zhob 85200, Balochistan, Pakistan
| | - Mingshu Wang
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, PR China
| | - Renyong Jia
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, PR China
| | - Shun Chen
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, PR China
| | - Mafeng Liu
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, PR China
| | - Dekang Zhu
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, PR China
| | - Xinxin Zhao
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, PR China
| | - Qun Gao
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, PR China
| | - Bin Tian
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, PR China
| | - Anchun Cheng
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, PR China.
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Risks associated with the consumption of irrigation water contaminated produce: on the role of quantitative microbial risk assessment. Curr Opin Food Sci 2021. [DOI: 10.1016/j.cofs.2021.03.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Glaize A, Young M, Harden L, Gutierrez-Rodriguez E, Thakur S. The effect of vegetation barriers at reducing the transmission of Salmonella and Escherichia coli from animal operations to fresh produce. Int J Food Microbiol 2021; 347:109196. [PMID: 33906045 DOI: 10.1016/j.ijfoodmicro.2021.109196] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 04/03/2021] [Accepted: 04/05/2021] [Indexed: 02/08/2023]
Abstract
Due to the recent outbreaks of Salmonella and Escherichia coli in fresh produce in the United States, the transfer of foodborne pathogens between animal feeding operations and fresh produce continues to be a considerable risk. The purpose of this study was to determine if the establishment of a vegetation barrier (VB) on small-scale sustainable farms could prevent the transmission of Salmonella and E. coli to nearby fresh produce fields. A 5-layer VB (31 × 49 m) was constructed between a dairy farm, a poultry farm, and a nearby produce field. Fresh produce (i.e., romaine lettuce and tomato), animal feces, and environmental (i.e., air, soil, and barrier) samples were collected for 15 months from 2018 to 2019. Four replicates of soil and fresh produce samples were taken from three plots located 10 m, 61 m, and 122 m away from the respective animal locations and processed for Salmonella and E. coli. Air and vegetative strip samples were sampled at 15-day intervals. Multiple colonies were processed from each positive sample, and a total of 143 positive Salmonella (n = 15) and E. coli (n = 128) isolates were retrieved from the soil, produce, air, and fecal samples. Interestingly, 18.2% of the Salmonella and E. coli isolates (n = 26) were recovered from fresh produce (n = 9) samples. Surprisingly, Salmonella isolates (n = 9) were only found in fecal (n = 3) samples collected from the dairy pasture. Data analysis suggests that the VB is an effective tool at reducing the transmission of E. coli and Salmonella from animal farms to fresh produce fields. However, based on phenotypic and genotypic testing, it is clear that fecal samples from animal farms are not the only source of pathogen contamination. This indicates that the environment (e.g., soil and wind), as well as the initial setup of the farm (e.g., proximity to service roads and produce plot placement), can contribute to the contamination of fresh produce. Our study recommends the need for more effective bioremediation and prevention control measures to use in conjunction with VBs to reduce pathogen transmission.
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Affiliation(s)
- Ayanna Glaize
- Department of Population Health & Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27607, USA
| | - Morgan Young
- Department of Population Health & Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27607, USA
| | - Lyndy Harden
- Department of Population Health & Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27607, USA
| | - Eduardo Gutierrez-Rodriguez
- Department of Horticulture and Landscape Architecture College of Agricultural Sciences, Colorado State University, USA
| | - Siddhartha Thakur
- Department of Population Health & Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27607, USA.
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Skandalis N, Maeusli M, Papafotis D, Miller S, Lee B, Theologidis I, Luna B. Environmental Spread of Antibiotic Resistance. Antibiotics (Basel) 2021; 10:640. [PMID: 34071771 PMCID: PMC8226744 DOI: 10.3390/antibiotics10060640] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 05/18/2021] [Accepted: 05/24/2021] [Indexed: 01/07/2023] Open
Abstract
Antibiotic resistance represents a global health concern. Soil, water, livestock and plant foods are directly or indirectly exposed to antibiotics due to their agricultural use or contamination. This selective pressure has acted synergistically to bacterial competition in nature to breed antibiotic-resistant (AR) bacteria. Research over the past few decades has focused on the emergence of AR pathogens in food products that can cause disease outbreaks and the spread of antibiotic resistance genes (ARGs), but One Health approaches have lately expanded the focus to include commensal bacteria as ARG donors. Despite the attempts of national and international authorities of developed and developing countries to reduce the over-prescription of antibiotics to humans and the use of antibiotics as livestock growth promoters, the selective flow of antibiotic resistance transmission from the environment to the clinic (and vice-versa) is increasing. This review focuses on the mechanisms of ARG transmission and the hotspots of antibiotic contamination resulting in the subsequent emergence of ARGs. It follows the transmission of ARGs from farm to plant and animal food products and provides examples of the impact of ARG flow to clinical settings. Understudied and emerging antibiotic resistance selection determinants, such as heavy metal and biocide contamination, are also discussed here.
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Affiliation(s)
- Nicholas Skandalis
- Department of Medicine, Keck School of Medicine at USC, Los Angeles, CA 90033, USA; (N.S.); (M.M.)
| | - Marlène Maeusli
- Department of Medicine, Keck School of Medicine at USC, Los Angeles, CA 90033, USA; (N.S.); (M.M.)
- Department of Molecular Microbiology and Immunology, Keck School of Medicine at USC, 1441 Eastlake Ave, NTT 6419, Los Angeles, CA 90033, USA; (S.M.); (B.L.)
| | - Dimitris Papafotis
- Department of Biology, National and Kapodistrian University of Athens, 157 72 Athens, Greece; (D.P.); (I.T.)
| | - Sarah Miller
- Department of Molecular Microbiology and Immunology, Keck School of Medicine at USC, 1441 Eastlake Ave, NTT 6419, Los Angeles, CA 90033, USA; (S.M.); (B.L.)
| | - Bosul Lee
- Department of Molecular Microbiology and Immunology, Keck School of Medicine at USC, 1441 Eastlake Ave, NTT 6419, Los Angeles, CA 90033, USA; (S.M.); (B.L.)
| | - Ioannis Theologidis
- Department of Biology, National and Kapodistrian University of Athens, 157 72 Athens, Greece; (D.P.); (I.T.)
| | - Brian Luna
- Department of Molecular Microbiology and Immunology, Keck School of Medicine at USC, 1441 Eastlake Ave, NTT 6419, Los Angeles, CA 90033, USA; (S.M.); (B.L.)
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Lambrecht E, Van Coillie E, Boon N, Heyndrickx M, Van de Wiele T. Transfer of Antibiotic Resistance Plasmid from Commensal E. coli Towards Human Intestinal Microbiota in the M-SHIME: Effect of E. coli dosis, Human Individual and Antibiotic Use. Life (Basel) 2021; 11:192. [PMID: 33670965 PMCID: PMC7997361 DOI: 10.3390/life11030192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 02/23/2021] [Accepted: 02/24/2021] [Indexed: 01/09/2023] Open
Abstract
Along with (in) direct contact with animals and a contaminated environment, humans are exposed to antibiotic-resistant bacteria by consumption of food. The implications of ingesting antibiotic-resistant commensal bacteria are unknown, as dose-response data on resistance transfer and spreading in our gut is lacking. In this study, transfer of a resistance plasmid (IncF), harbouring several antibiotic resistance genes, from a commensal E. coli strain towards human intestinal microbiota was assessed using a Mucosal Simulator of the Human Intestinal Ecosystem (M-SHIME). More specifically, the effect of the initial E. coli plasmid donor concentration (105 and 107 CFU/meal), antibiotic treatment (cefotaxime) and human individual (n = 6) on plasmid transfer towards lumen coliforms and anaerobes was determined. Transfer of the resistance plasmid to luminal coliforms and anaerobes was observed shortly after the donor strain arrived in the colon and was independent of the ingested dose. Transfer occurred in all six simulated colons and despite their unique microbial community composition, no differences could be detected in antibiotic resistance transfer rates between the simulated human colons. After 72 h, resistant coliform transconjugants levels ranged from 7.6 × 104 to 7.9 × 106 CFUcefotaxime resistant/Ml colon lumen. Presence of the resistance plasmid was confirmed and quantified by PCR and qPCR. Cefotaxime treatment led to a significant reduction (85%) in resistant coliforms, however no significant effect on the total number of cultivable coliforms and anaerobes was observed.
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Affiliation(s)
- Ellen Lambrecht
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, 9000 Gent, Belgium; (E.L.); (N.B.)
- Flanders Research Institute for Agriculture (ILVO), Fisheries and Food, Brusselsesteenweg 370, 9090 Melle, Belgium; (E.V.C.); (M.H.)
| | - Els Van Coillie
- Flanders Research Institute for Agriculture (ILVO), Fisheries and Food, Brusselsesteenweg 370, 9090 Melle, Belgium; (E.V.C.); (M.H.)
| | - Nico Boon
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, 9000 Gent, Belgium; (E.L.); (N.B.)
| | - Marc Heyndrickx
- Flanders Research Institute for Agriculture (ILVO), Fisheries and Food, Brusselsesteenweg 370, 9090 Melle, Belgium; (E.V.C.); (M.H.)
- Department of Pathology, Bacteriology and Avian Diseases, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Tom Van de Wiele
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, 9000 Gent, Belgium; (E.L.); (N.B.)
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21
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Endophytic Lifestyle of Global Clones of Extended-Spectrum β-Lactamase-Producing Priority Pathogens in Fresh Vegetables: a Trojan Horse Strategy Favoring Human Colonization? mSystems 2021; 6:6/1/e01125-20. [PMID: 33563779 PMCID: PMC7883542 DOI: 10.1128/msystems.01125-20] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
The global spread of antibiotic-resistant bacteria and their resistance genes is a critical issue that is no longer restricted to hospital settings, but also represents a growing problem involving environmental and food safety. In this study, we have performed a microbiological and genomic investigation of critical priority pathogens resistant to broad-spectrum cephalosporins and showing endophytic lifestyles in fresh vegetables sold in a country with high endemicity of extended-spectrum β-lactamases (ESBLs). We report the isolation of international high-risk clones of CTX-M-15-producing Escherichia coli, belonging to clonal complexes CC38 and CC648, and Klebsiella pneumoniae of complex CC307 from macerated tissue of surface-sterilized leaves of spinach, cabbage, arugula, and lettuce. Regardless of species, all ESBL-positive isolates were able to endophytically colonize common bean (Phaseolus vulgaris) seedlings, showed resistance to acid pH, and had a multidrug-resistant (MDR) profile to clinically relevant antibiotics (i.e., broad-spectrum cephalosporins, aminoglycosides, and fluoroquinolones). Genomic analysis of CTX-M-producing endophytic Enterobacterales revealed a wide resistome (antibiotics, biocides, disinfectants, and pesticides) and virulome, and genes for endophytic fitness and for withstanding acidic conditions. Transferable IncFIB and IncHI2A plasmids carried bla CTX-M-15 genes and, additionally, an IncFIB plasmid (named pKP301cro) also harbored genes encoding resistance to heavy metals. These data support the hypothesis that fresh vegetables marketed for consumption can act as a figurative Trojan horse for the hidden spread of international clones of critical WHO priority pathogens producing ESBLs, and/or their resistance genes, to humans and other animals, which is a critical issue within a food safety and broader public and environmental health perspective.IMPORTANCE Extended-spectrum β-lactamases (ESBL)-producing Enterobacterales are a leading cause of human and animal infections, being classified as critical priority pathogens by the World Health Organization. Epidemiological studies have shown that spread of ESBL-producing bacteria is not a problem restricted to hospitals, but also represents a growing problem involving environmental and food safety. In this regard, CTX-M-type β-lactamases have become the most widely distributed and clinically relevant ESBLs worldwide. Here, we have investigated the occurrence and genomic features of ESBL-producing Enterobacterales in surface-sterilized fresh vegetables. We have uncovered that international high-risk clones of CTX-M-15-producing Escherichia coli and Klebsiella pneumoniae harboring a wide resistome and virulome, carry additional genes for endophytic fitness and resistance to acidic conditions. Furthermore, we have demonstrated that these CTX-M-15-positive isolates are able to endophytically colonize plant tissues. Therefore, we believe that fresh vegetables can act as a figurative Trojan horse for the hidden spread of critical priority pathogens exhibiting endophytic lifestyles.
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Richter L, Plessis ED, Duvenage S, Korsten L. High prevalence of multidrug resistant Escherichia coli isolated from fresh vegetables sold by selected formal and informal traders in the most densely populated Province of South Africa. J Food Sci 2020; 86:161-168. [PMID: 33294974 DOI: 10.1111/1750-3841.15534] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 10/22/2020] [Accepted: 10/26/2020] [Indexed: 01/26/2023]
Abstract
Contaminated fresh produce has increasingly been implicated in foodborne disease outbreaks. As microbiological safety surveillance in South Africa is limited, a total of 545 vegetable samples (spinach, tomato, lettuce, cucumber, and green beans) were purchased from retailers, street traders, trolley vendors and farmers' markets. Escherichia coli, coliforms and Enterobacteriaceae were enumerated and the prevalence of Escherichia coli, Salmonella spp. and Listeria monocytogenes determined. E. coli isolates were characterized phenotypically (antibiotic resistance) and genotypically (diarrheagenic virulence genes). Coliforms, E. coli and Enterobacteriaceae counts were mostly not significantly different between formal and informal markets, with exceptions noted on occasion. When compared to international standards, 90% to 98% tomatoes, 70% to 94% spinach, 82% cucumbers, 93% lettuce, and 80% green bean samples, had satisfactory (≤ 100 CFU/g) E. coli counts. Of the 545 vegetable samples analyzed, 14.86% (n = 81) harbored E. coli, predominantly from leafy green vegetables. Virulence genes (lt, st, bfpA, eagg, eaeA, stx1, stx2, and ipaH) were not detected in the E. coli isolates (n = 67) characterized, however 40.30% were multidrug-resistant. Resistance to aminoglycosides (neomycin, 73.13%; gentamycin, < 10%), penicillins (ampicillin, 38.81%; amoxicillin, 41.79%; augmentin, < 10%), sulfonamides (cotrimoxazole, 22.39%), tetracycline (19.4%), chloramphenicol (11.94%), cephalosporins (cefepime, 34.33%), and carbapenemases (imipenem, < 10%) were observed. This study highlights the need for continued surveillance of multidrug resistant foodborne pathogens in fresh produce retailed formally and informally for potential consumer health risks. PRACTICAL APPLICATION: The results indicate that the microbiological quality of different vegetables were similar per product type, regardless of being purchased from formal retailers or informal street traders, trolley vendors or farmers' markets. Although no pathogenic bacteria (diarrheagenic E. coli, Salmonella spp. or L. monocytogenes) were isolated, high levels of multidrug-resistance was observed in the generic E. coli isolates. These findings highlight the importance of microbiological quality surveillance of fresh produce in formal and informal markets, as these products can be a reservoir of multidrug resistant bacteria harboring antibiotic resistance and virulence genes, potentially impacting human health.
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Affiliation(s)
- Loandi Richter
- Department of Plant and Soil Sciences, University of Pretoria, Hatfield, Pretoria, 0001, South Africa.,Department of Science and Innovation, National Research Foundation Centre of Excellence in Food Security, Cape Town, South Africa
| | - Erika Du Plessis
- Department of Plant and Soil Sciences, University of Pretoria, Hatfield, Pretoria, 0001, South Africa
| | - Stacey Duvenage
- Department of Plant and Soil Sciences, University of Pretoria, Hatfield, Pretoria, 0001, South Africa.,Department of Science and Innovation, National Research Foundation Centre of Excellence in Food Security, Cape Town, South Africa
| | - Lise Korsten
- Department of Plant and Soil Sciences, University of Pretoria, Hatfield, Pretoria, 0001, South Africa.,Department of Science and Innovation, National Research Foundation Centre of Excellence in Food Security, Cape Town, South Africa
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Abstract
Due to climate change, two-thirds of mankind will face water scarcity by 2025, while by 2050, global food production must increase by at least 50% to feed 9 billion people. To overcome water scarcity, 15 million m3/day of untreated wastewater is used globally for crop irrigation, polluting the soil with pathogens, heavy metals and excess salts. Since 10% of the global population consumes food from crops irrigated with wastewater, pathogens transmitted through the food chain cause diseases especially in young children and women. In this paper, we discuss the status of water scarcity and the challenges to food security, the reuse of wastewater in agriculture and the possible risks to human and environmental health. The efficiency of different irrigation systems in limiting the risks of wastewater reuse and the latest regulations of the European Commission on effluent recovery are also presented. Hence, we emphasize that irrigation offers real perspectives for large-scale recovery of wastewater, helping to reduce the deficit and conserve water resources, and increasing food safety, with the express mention that investments must be made in wastewater treatment plants and wastewater must be properly treated before recovery, to limit the risks on human health and the environment.
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Pantanella F, Lekunberri I, Gagliardi A, Venuto G, Sànchez-Melsió A, Fabiani M, Balcázar JL, Schippa S, De Giusti M, Borrego C, Solimini A. Effect of Urban Wastewater Discharge on the Abundance of Antibiotic Resistance Genes and Antibiotic-Resistant Escherichia coli in Two Italian Rivers. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17186813. [PMID: 32962009 PMCID: PMC7557954 DOI: 10.3390/ijerph17186813] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 09/14/2020] [Accepted: 09/15/2020] [Indexed: 12/13/2022]
Abstract
Background: Wastewater treatment plants (WWTPs) are microbial factories aimed to reduce the amount of nutrients and pathogenic microorganisms in the treated wastewater before its discharge into the environment. We studied the impact of urban WWTP effluents on the abundance of antibiotic resistance genes (ARGs) and antibiotic-resistant Escherichia coli (AR-E. coli) in the last stretch of two rivers (Arrone and Tiber) in Central Italy that differ in size and flow volume. Methods: Water samples were collected in three seasons upstream and downstream of the WWTP, at the WWTP outlet, and at sea sites near the river mouth, and analyzed for the abundance of ARGs by qPCR and AR-E. coli using cultivation followed by disk diffusion assays. Results: For all studied genes (16S rRNA, intI1, sul1, ermB, blaTEM, tetW and qnrS), absolute concentrations were significantly higher in the Tiber than in the Arrone at all sampling sites, despite their collection date, but the prevalence of target ARGs within bacterial communities in both rivers was similar. The absolute concentrations of most ARGs were also generally higher in the WWTP effluent with median levels between log 4 and log 6 copies per ml but did not show differences along the studied stretches of rivers. Statistically significant site effect was found for E. coli phenotypic resistance to tetracycline and ciprofloxacin in the Arrone but not in the Tiber. Conclusions: In both rivers, diffuse or point pollution sources other than the studied WWTP effluents may account for the observed resistance pattern, although the Arrone appears as more sensitive to the wastewater impact considering its lower flow volume.
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Affiliation(s)
- Fabrizio Pantanella
- Department of Public Health and Infectious Diseases, University of Rome “La Sapienza”, Piazza A. Moro 5, 00185 Rome, Italy; (F.P.); (A.G.); (G.V.); (M.F.); (S.S.); (M.D.G.)
| | - Itziar Lekunberri
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, 17003 Girona, Spain; (I.L.); (A.S.-M.); (J.L.B.); (C.B.)
| | - Antonella Gagliardi
- Department of Public Health and Infectious Diseases, University of Rome “La Sapienza”, Piazza A. Moro 5, 00185 Rome, Italy; (F.P.); (A.G.); (G.V.); (M.F.); (S.S.); (M.D.G.)
| | - Giuseppe Venuto
- Department of Public Health and Infectious Diseases, University of Rome “La Sapienza”, Piazza A. Moro 5, 00185 Rome, Italy; (F.P.); (A.G.); (G.V.); (M.F.); (S.S.); (M.D.G.)
| | - Alexandre Sànchez-Melsió
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, 17003 Girona, Spain; (I.L.); (A.S.-M.); (J.L.B.); (C.B.)
| | - Massimo Fabiani
- Department of Public Health and Infectious Diseases, University of Rome “La Sapienza”, Piazza A. Moro 5, 00185 Rome, Italy; (F.P.); (A.G.); (G.V.); (M.F.); (S.S.); (M.D.G.)
| | - José Luis Balcázar
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, 17003 Girona, Spain; (I.L.); (A.S.-M.); (J.L.B.); (C.B.)
| | - Serena Schippa
- Department of Public Health and Infectious Diseases, University of Rome “La Sapienza”, Piazza A. Moro 5, 00185 Rome, Italy; (F.P.); (A.G.); (G.V.); (M.F.); (S.S.); (M.D.G.)
| | - Maria De Giusti
- Department of Public Health and Infectious Diseases, University of Rome “La Sapienza”, Piazza A. Moro 5, 00185 Rome, Italy; (F.P.); (A.G.); (G.V.); (M.F.); (S.S.); (M.D.G.)
| | - Carles Borrego
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, 17003 Girona, Spain; (I.L.); (A.S.-M.); (J.L.B.); (C.B.)
- Group of Molecular Microbial Ecology, Institute of Aquatic Ecology, University of Girona, 17001 Girona, Spain
| | - Angelo Solimini
- Department of Public Health and Infectious Diseases, University of Rome “La Sapienza”, Piazza A. Moro 5, 00185 Rome, Italy; (F.P.); (A.G.); (G.V.); (M.F.); (S.S.); (M.D.G.)
- Correspondence: ; Tel.: +39-06-4991-463
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Scaccia N, Vaz-Moreira I, Manaia CM. Persistence of wastewater antibiotic resistant bacteria and their genes in human fecal material. FEMS Microbiol Ecol 2020; 96:5815073. [PMID: 32239211 DOI: 10.1093/femsec/fiaa058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 03/27/2020] [Indexed: 01/11/2023] Open
Abstract
Domestic wastewater is a recognized source of antibiotic resistant bacteria and antibiotic resistance genes (ARB&ARGs), whose risk of transmission to humans cannot be ignored. The fitness of wastewater ARB in the complex fecal microbiota of a healthy human was investigated in feces-based microcosm assays (FMAs). FMAs were inoculated with two wastewater isolates, Escherichia coli strain A2FCC14 (MLST ST131) and Enterococcus faecium strain H1EV10 (MLST ST78), harboring the ARGs blaTEM, blaCTX, blaOXA-A and vanA, respectively. The FMAs, incubated in the presence or absence of oxygen or in the presence or absence of the antibiotics cefotaxime or vancomycin, were monitored based on cultivation, ARGs quantification and bacterial community analysis. The fecal bacterial community was dominated by members of the phyla Firmicutes, Bacteroidetes, Actinobacteria, Proteobacteria and Verrucomicrobia. The ARGs harbored by the wastewater isolates could be quantified after one week, in FMAs incubated under both aerobic and anaerobic conditions. These observations were not significantly different in FMAs incubated anaerobically, supplemented with sub-inhibitory concentrations of cefotaxime or vancomycin. The observation that ARGs of wastewater ARB persisted in presence of the human fecal microbiota for at least one week supports the hypothesis of a potential transmission to humans, a topic that deserves further investigation.
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Affiliation(s)
- Nazareno Scaccia
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Ivone Vaz-Moreira
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Célia M Manaia
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
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Astill GM, Kuchler F, Todd JE, Page ET. Shiga Toxin-Producing Escherichia coli (STEC) O157:H7 and Romaine Lettuce: Source Labeling, Prevention, and Business. Am J Public Health 2020; 110:322-328. [PMID: 31944843 PMCID: PMC7002929 DOI: 10.2105/ajph.2019.305476] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/25/2019] [Indexed: 11/04/2022]
Abstract
From May to November most romaine lettuce shipments in the United States come from California's Central Coast region, whereas from December to April most come from the Yuma, Arizona, region. During 2017-2018, the 3 outbreaks of Shiga toxin-producing Escherichia coli (STEC) O157:H7 in US romaine lettuce all occurred at the tail end of a region's production season. During the fall 2018 outbreak, the US Food and Drug Administration (FDA) recommended that suppliers begin labeling romaine packaging so that consumers can identify the product's harvest region.We used publicly available data to show that labels may not avert many illnesses in future outbreaks but may reduce suppliers' financial losses and reduce food loss.Market data available during both 2018 outbreak investigations showed that there was no romaine production from one of the 2 regions when the first illness onset occurred. That is, at the beginning of an outbreak investigation, market data may allow the FDA to quickly rule out an entire production region as a source of contamination.
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Affiliation(s)
- Gregory M Astill
- Gregory M. Astill is with the Markets and Trade Economics Division, Economic Research Service, US Department of Agriculture, Kansas City, MO. Fred Kuchler, Jessica E. Todd, and Elina T. Page are with the Food Economics Division, Economic Research Service, US Department of Agriculture, Washington, DC
| | - Fred Kuchler
- Gregory M. Astill is with the Markets and Trade Economics Division, Economic Research Service, US Department of Agriculture, Kansas City, MO. Fred Kuchler, Jessica E. Todd, and Elina T. Page are with the Food Economics Division, Economic Research Service, US Department of Agriculture, Washington, DC
| | - Jessica E Todd
- Gregory M. Astill is with the Markets and Trade Economics Division, Economic Research Service, US Department of Agriculture, Kansas City, MO. Fred Kuchler, Jessica E. Todd, and Elina T. Page are with the Food Economics Division, Economic Research Service, US Department of Agriculture, Washington, DC
| | - Elina T Page
- Gregory M. Astill is with the Markets and Trade Economics Division, Economic Research Service, US Department of Agriculture, Kansas City, MO. Fred Kuchler, Jessica E. Todd, and Elina T. Page are with the Food Economics Division, Economic Research Service, US Department of Agriculture, Washington, DC
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27
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Zhou SYD, Zhu D, Giles M, Daniell T, Neilson R, Yang XR. Does reduced usage of antibiotics in livestock production mitigate the spread of antibiotic resistance in soil, earthworm guts, and the phyllosphere? ENVIRONMENT INTERNATIONAL 2020; 136:105359. [PMID: 32036081 DOI: 10.1016/j.envint.2019.105359] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 11/11/2019] [Accepted: 11/22/2019] [Indexed: 06/10/2023]
Abstract
The overuse of antibiotics in animal husbandry is widespread and believed to significantly contribute to the selection of antibiotic resistance genes (ARGs) in animals. Thus, there is a global drive to reduce antibiotic use in the agricultural sector. However, it has not been established whether a reduction in the use of antibiotics in livestock production would be effective in reducing the spread of ARGs. A microcosm approach was used to determine how the addition of manure with either reduced antibiotic levels or with typical antibiotic levels could affect the spread of antibiotic resistance genes between soil, earthworms and the phyllosphere. When compared to the control soil, earthworm and phyllosphere samples had the greater increase in ARG abundance in conventional manure treatments (P < 0.05). Reduced antibiotic manure also enriched the abundance of ARGs in the phyllosphere and soil but not earthworm guts when compared to the control (P < 0.05). In both soil and earthworm guts, the enrichment of ARGs was lower in reduced antibiotic manure than in conventional manure. This study has identified bacterial transfer through the soil-earthworm-phyllosphere system as a potential means to spread ARGs between habitats after fertilization with livestock derived manures.
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Affiliation(s)
- Shu-Yi-Dan Zhou
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Dong Zhu
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Madeline Giles
- Ecological Sciences, The James Hutton Institute, Dundee, DD2 5DA Scotland, UK
| | - Tim Daniell
- Department of Animal and Plant Sciences, The University of Sheffield, Sheffield S10 2TN, UK
| | - Roy Neilson
- Ecological Sciences, The James Hutton Institute, Dundee, DD2 5DA Scotland, UK
| | - Xiao-Ru Yang
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China.
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