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Kasanga M, Shempela DM, Daka V, Mwikisa MJ, Sikalima J, Chanda D, Mudenda S. Antimicrobial resistance profiles of Escherichia coli isolated from clinical and environmental samples: findings and implications. JAC Antimicrob Resist 2024; 6:dlae061. [PMID: 38680604 PMCID: PMC11055401 DOI: 10.1093/jacamr/dlae061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 03/17/2024] [Indexed: 05/01/2024] Open
Abstract
Background The overuse and misuse of antimicrobials has worsened the problem of antimicrobial resistance (AMR) globally. This study investigated the AMR profiles of Escherichia coli isolated from clinical and environmental samples in Lusaka, Zambia. Methods This was a cross-sectional study conducted from February 2023 to June 2023 using 450 samples. VITEK® 2 Compact was used to identify E. coli and perform antimicrobial susceptibility testing. Data analysis was done using WHONET 2022 and SPSS version 25.0. Results Of the 450 samples, 66.7% (n = 300) were clinical samples, whereas 33.3% (n = 150) were environmental samples. Overall, 47.8% (n = 215) (37.8% clinical and 10% environmental) tested positive for E. coli. Of the 215 E. coli isolates, 66.5% were MDR and 42.8% were ESBL-producers. Most isolates were resistant to ampicillin (81.4%), sulfamethoxazole/trimethoprim (70.7%), ciprofloxacin (67.9%), levofloxacin (64.6%), ceftriaxone (62.3%) and cefuroxime (62%). Intriguingly, E. coli isolates were highly susceptible to amikacin (100%), imipenem (99.5%), nitrofurantoin (89.3%), ceftolozane/tazobactam (82%) and gentamicin (72.1%). Conclusions This study found a high resistance of E. coli to some antibiotics that are commonly used in humans. The isolation of MDR and ESBL-producing E. coli is a public health concern and requires urgent action. Therefore, there is a need to instigate and strengthen interventional strategies including antimicrobial stewardship programmes to combat AMR in Zambia.
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Affiliation(s)
- Maisa Kasanga
- Department of Epidemiology and Biostatistics, School of Public Health, Zhengzhou University, Zhengzhou, China
| | - Doreen Mainza Shempela
- Laboratory Department, Churches Health Association of Zambia, CHAZ COMPLEX Meanwood Drive (off Great East Road), Plot No. 2882/B/5/10, P.O. Box 34511, JC9H+VFF, Lusaka, Zambia
| | - Victor Daka
- Public Health Department, Michael Chilufya Sata School of Medicine, Copperbelt University, Ndola, Zambia
| | - Mark J Mwikisa
- Department of Pathology and Microbiology, Lusaka Trust Hospital, Plot 2191, H8CC+52F, Nsumbu Rd, Woodlands, Lusaka, Zambia
| | - Jay Sikalima
- Laboratory Department, Churches Health Association of Zambia, CHAZ COMPLEX Meanwood Drive (off Great East Road), Plot No. 2882/B/5/10, P.O. Box 34511, JC9H+VFF, Lusaka, Zambia
| | - Duncan Chanda
- Adult Centre of Excellence, University Teaching Hospital, Lusaka, Zambia
| | - Steward Mudenda
- Department of Pharmacy, School of Health Sciences, University of Zambia, Lusaka, Zambia
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Cho S, Hiott LM, Read QD, Damashek J, Westrich J, Edwards M, Seim RF, Glinski DA, Bateman McDonald JM, Ottesen EA, Lipp EK, Henderson WM, Jackson CR, Frye JG. Distribution of Antibiotic Resistance in a Mixed-Use Watershed and the Impact of Wastewater Treatment Plants on Antibiotic Resistance in Surface Water. Antibiotics (Basel) 2023; 12:1586. [PMID: 37998788 PMCID: PMC10668835 DOI: 10.3390/antibiotics12111586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 10/28/2023] [Accepted: 10/31/2023] [Indexed: 11/25/2023] Open
Abstract
The aquatic environment has been recognized as a source of antibiotic resistance (AR) that factors into the One Health approach to combat AR. To provide much needed data on AR in the environment, a comprehensive survey of antibiotic-resistant bacteria (ARB), antibiotic resistance genes (ARGs), and antibiotic residues was conducted in a mixed-use watershed and wastewater treatment plants (WWTPs) within the watershed to evaluate these contaminants in surface water. A culture-based approach was used to determine prevalence and diversity of ARB in surface water. Low levels of AR Salmonella (9.6%) and Escherichia coli (6.5%) were detected, while all Enterococcus were resistant to at least one tested antibiotic. Fewer than 20% of extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae (17.3%) and carbapenem-resistant Enterobacteriaceae (CRE) (7.7%) were recovered. Six ARGs were detected using qPCR, primarily the erythromycin-resistance gene, ermB. Of the 26 antibiotics measured, almost all water samples (98.7%) had detectable levels of antibiotics. Analysis of wastewater samples from three WWTPs showed that WWTPs did not completely remove AR contaminants. ARGs and antibiotics were detected in all the WWTP effluent discharges, indicating that WWTPs are the source of AR contaminants in receiving water. However, no significant difference in ARGs and antibiotics between the upstream and downstream water suggests that there are other sources of AR contamination. The widespread occurrence and abundance of medically important antibiotics, bacteria resistant to antibiotics used for human and veterinary purposes, and the genes associated with resistance to these antibiotics, may potentially pose risks to the local populations exposed to these water sources.
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Affiliation(s)
- Sohyun Cho
- Poultry Microbiological Safety and Processing Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Athens, GA 30605, USA; (S.C.); (L.M.H.); (C.R.J.)
- Oak Ridge Institute for Science and Education, Oak Ridge, TN 37830, USA;
| | - Lari M. Hiott
- Poultry Microbiological Safety and Processing Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Athens, GA 30605, USA; (S.C.); (L.M.H.); (C.R.J.)
| | - Quentin D. Read
- Agricultural Research Service, U.S. Department of Agriculture, Southeast Area, Raleigh, NC 27606, USA;
| | - Julian Damashek
- Department of Biology, Utica University, Utica, NY 13502, USA;
- Department of Microbiology, University of Georgia, Athens, GA 30602, USA; (J.W.); (E.A.O.)
| | - Jason Westrich
- Department of Microbiology, University of Georgia, Athens, GA 30602, USA; (J.W.); (E.A.O.)
| | - Martinique Edwards
- Department of Environmental Health Science, University of Georgia, Athens, GA 30602, USA; (M.E.); (E.K.L.)
| | - Roland F. Seim
- Oak Ridge Institute for Science and Education, Oak Ridge, TN 37830, USA;
- Center for Environmental Measurement and Modeling, Office of Research and Development, U.S. Environmental Protection Agency, Athens, GA 30605, USA; (D.A.G.); (W.M.H.)
| | - Donna A. Glinski
- Center for Environmental Measurement and Modeling, Office of Research and Development, U.S. Environmental Protection Agency, Athens, GA 30605, USA; (D.A.G.); (W.M.H.)
| | - Jacob M. Bateman McDonald
- Lewis F. Rogers Institute for Environmental and Spatial Analysis, University of North Georgia, Oakwood, GA 30566, USA;
| | - Elizabeth A. Ottesen
- Department of Microbiology, University of Georgia, Athens, GA 30602, USA; (J.W.); (E.A.O.)
| | - Erin K. Lipp
- Department of Environmental Health Science, University of Georgia, Athens, GA 30602, USA; (M.E.); (E.K.L.)
| | - William Matthew Henderson
- Center for Environmental Measurement and Modeling, Office of Research and Development, U.S. Environmental Protection Agency, Athens, GA 30605, USA; (D.A.G.); (W.M.H.)
| | - Charlene R. Jackson
- Poultry Microbiological Safety and Processing Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Athens, GA 30605, USA; (S.C.); (L.M.H.); (C.R.J.)
| | - Jonathan G. Frye
- Poultry Microbiological Safety and Processing Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Athens, GA 30605, USA; (S.C.); (L.M.H.); (C.R.J.)
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3
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Azeem M, Hanif M, Mahmood K, Siddique F, Hashem HE, Aziz M, Ameer N, Abid U, Latif H, Ramzan N, Rawat R. Design, synthesis, spectroscopic characterization, in-vitro antibacterial evaluation and in-silico analysis of polycaprolactone containing chitosan-quercetin microspheres. J Biomol Struct Dyn 2023; 41:7084-7103. [PMID: 36069131 DOI: 10.1080/07391102.2022.2119602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 08/14/2022] [Indexed: 10/14/2022]
Abstract
Aim of present study was to synthesize a novel chitosan-quercetin (CTS-QT) complex by making a carbodiimide linkage using maleic anhydride as cross-linker and to investigate its enhanced antibacterial and antioxidant activities as compare to pure CTS and QT. Equimolar concentration of QT and maleic anhydride were used to react with 100 mg CTS to form CTS-QT complex. For this purpose, three bacterial strains namely E. Coli, S. Aureus and P. Aeruginosa were used for in-vitro antibacterial analysis (ZOI, MIC, MBC, checker board and time kill assay). Later molecular docking studies were performed on protein structure of E. Coli to assess binding affinity of pure QT and CTS-QT complex. MD simulations with accelerated settings were used to explore the protein-ligand complex's binding interactions and stability. Antioxidant profile was determined by performing DPPH• radical scavenging assay, total antioxidant capacity (TAC) and total reducing power (TRP) assays. Delivery mechanism to CTS-QT complex was improved by synthesizing polycaprolactone containing microspheres (CTS-QT-PCL-Levo-Ms) using Levofloxacin as model drug to enhance their antibacterial profile. Resulted microspheres were evaluated by particle size, charge, surface morphology, in-vitro drug release and hemolytic profile and are all were found within limits. Antibacterial assay revealed that CTS-QT-PCL-Levo-Ms showed more than two folds increased bactericidal activity against E. Coli and P. Aeruginosa, while 1.5 folds against S. Aureus. Green colored formation of phosphate molybdate complexes with highest 85 ± 1.32% TAC confirmed its antioxidant properties. Furthermore, molecular docking and dynamics studies revealed that CTS-QT was embedded nicely within the active pocket of UPPS with binding energy greater than QT with RSMD value of below 1.5. Conclusively, use of maleic acid, in-vitro and in-silico antimicrobial studies confirm the emergence of CTS-QT complex containing microspheres as novel treatment strategy for all types of bacterial infections.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Muhammad Azeem
- Department of Pharmaceutics, Faculty of Pharmacy, Bahauddin Zakariya University, Multan, Pakistan
- Hamdard Institute of Pharmaceutical Sciences, Hamdard University Islamabad, Multan, Pakistan
| | - Muhammad Hanif
- Department of Pharmaceutics, Faculty of Pharmacy, Bahauddin Zakariya University, Multan, Pakistan
| | - Khalid Mahmood
- Institute of Chemical Sciences, Bahauddin Zakariya University, Multan, Pakistan
| | - Farhan Siddique
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Bahauddin Zakariya University, Multan, Pakistan
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, Norrkoping, Sweden
| | - Heba E Hashem
- Department of Chemistry, Faculty of Women, Ain Shams University, Cairo, Egypt
| | - Mubashir Aziz
- Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan, Pakistan
| | - Nabeela Ameer
- Department of Pharmaceutics, Faculty of Pharmacy, Bahauddin Zakariya University, Multan, Pakistan
| | - Usman Abid
- Department of Pharmaceutics, Faculty of Pharmacy, Bahauddin Zakariya University, Multan, Pakistan
| | - Hafsa Latif
- Department of Pharmaceutics, Faculty of Pharmacy, Bahauddin Zakariya University, Multan, Pakistan
| | - Nasreen Ramzan
- Department of Pharmaceutics, Faculty of Pharmacy, Bahauddin Zakariya University, Multan, Pakistan
| | - Ravi Rawat
- School of Pharmaceutical Sciences, MVN University, Haryana, India
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Lynch VD, Shaman J. Waterborne Infectious Diseases Associated with Exposure to Tropical Cyclonic Storms, United States, 1996-2018. Emerg Infect Dis 2023; 29:1548-1558. [PMID: 37486189 PMCID: PMC10370842 DOI: 10.3201/eid2908.221906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023] Open
Abstract
In the United States, tropical cyclones cause destructive flooding that can lead to adverse health outcomes. Storm-driven flooding contaminates environmental, recreational, and drinking water sources, but few studies have examined effects on specific infections over time. We used 23 years of exposure and case data to assess the effects of tropical cyclones on 6 waterborne diseases in a conditional quasi-Poisson model. We separately defined storm exposure for windspeed, rainfall, and proximity to the storm track. Exposure to storm-related rainfall was associated with a 48% (95% CI 27%-69%) increase in Shiga toxin-producing Escherichia coli infections 1 week after storms and a 42% (95% CI 22%-62%) in increase Legionnaires' disease 2 weeks after storms. Cryptosporidiosis cases increased 52% (95% CI 42%-62%) during storm weeks but declined over ensuing weeks. Cyclones are a risk to public health that will likely become more serious with climate change and aging water infrastructure systems.
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5
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Damashek J, Westrich JR, McDonald JMB, Teachey ME, Jackson CR, Frye JG, Lipp EK, Capps KA, Ottesen EA. Non-point source fecal contamination from aging wastewater infrastructure is a primary driver of antibiotic resistance in surface waters. WATER RESEARCH 2022; 222:118853. [PMID: 35870389 DOI: 10.1016/j.watres.2022.118853] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 07/06/2022] [Accepted: 07/09/2022] [Indexed: 06/15/2023]
Abstract
Antibiotic resistance is a global threat to human health. Many surface water resources are environmental hotspots of antibiotic resistant gene (ARG) transfer, with agricultural runoff and human waste highlighted as common sources of ARGs to aquatic systems. Here we quantified fecal marker genes and ARGs in 992 stream water samples collected seasonally during a 5-year period from 115 sites across the Upper Oconee watershed (Georgia, USA), an area characterized by gradients of agricultural and urban development. Widespread fecal contamination was found from humans (48% of samples), ruminants (55%), and poultry (19%), and 73% of samples tested positive for at least one of the six targeted ARGs (ermB, tet(B), blaCTX-M-1, blaKPC, blaSHV, and qnrS). While ARGs were strongly correlated with human fecal markers, many highly contaminated samples were not associated with sewage outfalls, an expected source of fecal and ARG pollution. To determine sources of contamination, we synthesized ARG and fecal marker data with geospatial data on land use/land cover and wastewater infrastructure across the watershed. This novel analysis found strong correlations between ARGs and measures of sewer density, sewer length, and septic system age within sample watersheds, indicating non-point sources of fecal contamination from aging wastewater infrastructure can be critical disseminators of anthropogenic ARGs in the environment.
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Affiliation(s)
- Julian Damashek
- Department of Microbiology, University of Georgia, 120 Cedar Street, Athens, GA 30602, USA
| | - Jason R Westrich
- Department of Microbiology, University of Georgia, 120 Cedar Street, Athens, GA 30602, USA
| | - Jacob M Bateman McDonald
- Lewis F. Rogers Institute for Environmental and Spatial Analysis, University of North Georgia, 2636 Mathis Drive, Oakwood, GA 30566, USA
| | - Morgan E Teachey
- Department of Microbiology, University of Georgia, 120 Cedar Street, Athens, GA 30602, USA
| | - Charlene R Jackson
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, U.S. National Poultry Research Center, USDA-ARS, 950 College Station Road, Athens, GA 30605, USA
| | - Jonathan G Frye
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, U.S. National Poultry Research Center, USDA-ARS, 950 College Station Road, Athens, GA 30605, USA
| | - Erin K Lipp
- Department of Environmental Health Science, University of Georgia, 150 East Green Street, Athens, GA 30602, USA
| | - Krista A Capps
- Odum School of Ecology, University of Georgia, 140 East Green Street, Athens, GA 30602, USA; Savannah River Ecology Laboratory, University of Georgia, SRS Building 737A, Aiken, SC 29808, USA
| | - Elizabeth A Ottesen
- Department of Microbiology, University of Georgia, 120 Cedar Street, Athens, GA 30602, USA.
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6
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New N-Alkylated Heterocyclic Compounds as Prospective NDM1 Inhibitors: Investigation of In Vitro and In Silico Properties. Pharmaceuticals (Basel) 2022; 15:ph15070803. [PMID: 35890102 PMCID: PMC9322059 DOI: 10.3390/ph15070803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/21/2022] [Accepted: 06/21/2022] [Indexed: 02/06/2023] Open
Abstract
A new family of pyrazole-based compounds (1–15) was synthesized and characterized using different physicochemical analyses, such as FTIR, UV-Visible, 1H, 13C NMR, and ESI/LC-MS. The compounds were evaluated for their in vitro antifungal and antibacterial activities against several fungal and bacterial strains. The results indicate that some compounds showed excellent antibacterial activity against E. coli, S. aureus, C. freundii, and L. monocytogenes strains. In contrast, none of the compounds had antifungal activity. Molecular electrostatic potential (MEP) map analyses and inductive and mesomeric effect studies were performed to study the relationship between the chemical structure of our compounds and the biological activity. In addition, molecular docking and virtual screening studies were carried out to rationalize the antibacterial findings to characterize the modes of binding of the most active compounds to the active pockets of NDM1 proteins.
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7
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Analysis of Salmonella enterica Isolated from a Mixed-Use Watershed in Georgia, USA: Antimicrobial Resistance, Serotype Diversity, and Genetic Relatedness to Human Isolates. Appl Environ Microbiol 2022; 88:e0039322. [PMID: 35532233 DOI: 10.1128/aem.00393-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
As the cases of Salmonella enterica infections associated with contaminated water are increasing, this study was conducted to address the role of surface water as a reservoir of S. enterica serotypes. We sampled rivers and streams (n = 688) over a 3-year period (2015 to 2017) in a mixed-use watershed in Georgia, USA, and 70.2% of the total stream samples tested positive for Salmonella. A total of 1,190 isolates were recovered and characterized by serotyping, antimicrobial susceptibility testing, and pulsed-field gel electrophoresis (PFGE). A wide range of serotypes was identified, including those commonly associated with humans and animals, with S. enterica serotype Muenchen being predominant (22.7%) and each serotype exhibiting a high degree of strain diversity by PFGE. About half (46.1%) of the isolates had PFGE patterns indistinguishable from those of human clinical isolates in the CDC PulseNet database. A total of 52 isolates (4.4%) were resistant to antimicrobials, out of which 43 isolates were multidrug resistant (MDR; resistance to two or more classes of antimicrobials). These 52 resistant Salmonella isolates were screened for the presence of antimicrobial resistance genes, plasmid replicons, and class 1 integrons, out of which four representative MDR isolates were selected for whole-genome sequencing analysis. The results showed that 28 MDR isolates resistant to 10 antimicrobials had blacmy-2 on an A/C plasmid. Persistent contamination of surface water with a high diversity of Salmonella strains, some of which are drug resistant and genetically indistinguishable from human isolates, supports a role of environmental surface water as a reservoir for and transmission route of this pathogen. IMPORTANCE Salmonella has been traditionally considered a foodborne pathogen, as it is one of the most common etiologies of foodborne illnesses worldwide; however, recent Salmonella outbreaks attributed to fresh produce and water suggest a potential environmental source of Salmonella that causes some human illnesses. Here, we investigated the prevalence, diversity, and antimicrobial resistance of Salmonella isolated from a mixed-use watershed in Georgia, USA, in order to enhance the overall understanding of waterborne Salmonella. The persistence and widespread distribution of Salmonella in surface water confirm environmental sources of the pathogen. A high proportion of waterborne Salmonella with clinically significant serotypes and genetic similarity to strains of human origin supports the role of environmental water as a significant reservoir of Salmonella and indicates a potential waterborne transmission of Salmonella to humans. The presence of antimicrobial-resistant and MDR Salmonella demonstrates additional risks associated with exposure to contaminated environmental water.
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Kichana E, Addy F, Dufailu OA. Genetic characterization and antimicrobial susceptibility of Escherichia coli isolated from household water sources in northern Ghana. JOURNAL OF WATER AND HEALTH 2022; 20:770-780. [PMID: 35635771 DOI: 10.2166/wh.2022.197] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The microbial quality of household water is an important issue in developing countries, especially in Ghana, where many people still depend on unimproved sources of water. The present study investigated the prevalence, genetic characteristics, and antimicrobial resistance profile of Escherichia coli from surface water sources. Fifty-two water samples were analyzed by using a spread plate, a biochemical test, and multiplex polymerase chain reactions. E. coli was isolated from each of the 52 water samples. Of these isolates, 75% were noted to possess virulence genes. Approximately 54% of the isolates were characterized as follows: enterotoxigenic E. coli (ETEC, 10.26%), enteropathogenic E. coli (EPEC, 17.95%), verotoxigenic E. coli (VTEC, 23.07%), and enteroinvasive E. coli (EIEC, 2.57%). Eighteen of the fifty-two isolates could not be characterized due to heterogeneity in banding. The disc diffusion method was used to test for antimicrobial susceptibility. The isolates were most resistant to ceftazidime, augmentin, and cefuroxime. Multidrug resistance was recorded in 48.1% of the isolates. In contrast, the isolates were most susceptible to ciprofloxacin (86.5%), nitrofurantoin (84.6%), and ofloxacin (75%). These results revealed a high diversity and widespread of E. coli in northern Ghana. The study provides important data for public health nationwide surveillance of E. coli in surface water across the country.
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Affiliation(s)
- Elvis Kichana
- Regional Water Quality Laboratory, World Vision Ghana, No. 3 Kotei Robertson Road, North Industrial Area, North Kaneshie, PMB Accra, Ghana E-mail:
| | - Francis Addy
- Department of Biotechnology, University for Development Studies, Tamale NL-1142-8658, Ghana
| | - Osman Adamu Dufailu
- Department of Microbiology, University for Development Studies, Tamale NL-1142-8658, Ghana
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Samy AA, Mansour AS, Khalaf DD, Khairy EA. Development of multidrug-resistant Escherichia coli in some Egyptian veterinary farms. Vet World 2022; 15:488-495. [PMID: 35400950 PMCID: PMC8980374 DOI: 10.14202/vetworld.2022.488-495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 01/20/2022] [Indexed: 11/16/2022] Open
Abstract
Background and Aim: Food of animal origin is considered a major source of foodborne diseases. In this context, multidrug-resistant (MDR) Escherichia coli pose a serious hazard to public health due to the consumption of food contaminated with antibiotics that are used for the treatment of various bacterial infections in farm animals. Therefore, this study aimed to determine the effect of the excessive use of antibiotics on the development of MDR E. coli strains in Egyptian poultry, dairy, and meat farms.
Materials and Methods: A total of 1225 samples were randomly collected from poultry, dairy, and meat products intended for human consumption in different governorates. E. coli were isolated from the collected samples and subjected to biochemical identification and antibiotic sensitivity tests with antibiotics commonly used in human and veterinary medicine. Then, amoxicillin (AML)- and oxytetracycline (OT)-resistant E. coli isolates were subjected to a polymerase chain reaction test to detect the blaTEM and tetA genes, respectively.
Results: E. coli were isolated from 132 out of 350, 148 out of 350, 177 out of 350, and 35 out of 175 poultry, milk, meat, and human samples, respectively. Most of the isolates expressed multidrug resistance, and resistance genes (blaTEM and tetA) were detected in all the tested AML- and OT-resistant E. coli isolates.
Conclusion: Foods of animal origin may represent a source of MDR E. coli, which can be a major threat to public health.
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Affiliation(s)
- A. A. Samy
- Department of Microbiology and Immunology, National Research Center, Dokki, Cairo, Egypt
| | - Asmaa S. Mansour
- Department of Microbiology and Immunology, National Research Center, Dokki, Cairo, Egypt
| | - Doaa D. Khalaf
- Department of Microbiology and Immunology, National Research Center, Dokki, Cairo, Egypt
| | - Eman A. Khairy
- Department of Microbiology and Immunology, National Research Center, Dokki, Cairo, Egypt
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Moshi HA, Shilla DA, Kimirei IA, O’ Reilly C, Clymans W, Bishop I, Loiselle SA. Community monitoring of coliform pollution in Lake Tanganyika. PLoS One 2022; 17:e0262881. [PMID: 35089939 PMCID: PMC8797266 DOI: 10.1371/journal.pone.0262881] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 01/10/2022] [Indexed: 11/18/2022] Open
Abstract
Conventional water quality monitoring has been done for decades in Lake Tanganyika, under different national and international programs. However, these projects utilized monitoring approaches, which were temporally limited, labour intensive and costly. This study examines the use of citizen science to monitor the dynamics of coliform concentrations in Lake Tanganyika as a complementary method to statutory and project-focused measurements. Persons in five coastal communities (Kibirizi, Ilagala, Karago, Ujiji and Gombe) were trained and monitored total coliforms, faecal coliforms and turbidity for one year on a monthly basis, in parallel with professional scientists. A standardized and calibrated Secchi tube was used at the same time to determine turbidity. Results indicate that total and faecal coliform concentrations determined by citizen scientists correlated well to those determined by professional scientists. Furthermore, citizen scientist-based turbidity values were shown to provide a potential indicator for high FC and TC concentrations. As a simple tiered approach to identify increased coliform loads, trained local citizen scientists could use low-cost turbidity measurements with follow up sampling and analysis for coliforms, to inform their communities and regulatory bodies of high risk conditions, as well as to validate local mitigation actions. By comparing the spatial and temporal dynamics of coliform concentrations to local conditions of infrastructure, population, precipitation and hydrology in the 15 sites (3 sites per community) over 12 months, potential drivers of coliform pollution in these communities were identified, largely related to precipitation dynamics and the land use.
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Affiliation(s)
- Happiness Anold Moshi
- Tanzania Fisheries Research Institute, Kigoma Centre, Kigoma, Tanzania
- Department of Aquatic Sciences and Fisheries Technology, University of Dar es Salaam, Dar es Salaam, Tanzania
| | - Daniel Abel Shilla
- Department of Aquatic Sciences and Fisheries Technology, University of Dar es Salaam, Dar es Salaam, Tanzania
| | - Ismael Aaron Kimirei
- Tanzania Fisheries Research Institute, Dar es Salaam Headquarters, Dar es Salaam, Tanzania
| | - Catherine O’ Reilly
- Department of Geography, Geology and the Environment, Illinois State University, Normal, IL, United States of America
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Bell RL, Kase JA, Harrison LM, Balan KV, Babu U, Chen Y, Macarisin D, Kwon HJ, Zheng J, Stevens EL, Meng J, Brown EW. The Persistence of Bacterial Pathogens in Surface Water and Its Impact on Global Food Safety. Pathogens 2021; 10:1391. [PMID: 34832547 PMCID: PMC8617848 DOI: 10.3390/pathogens10111391] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 10/15/2021] [Accepted: 10/19/2021] [Indexed: 11/17/2022] Open
Abstract
Water is vital to agriculture. It is essential that the water used for the production of fresh produce commodities be safe. Microbial pathogens are able to survive for extended periods of time in water. It is critical to understand their biology and ecology in this ecosystem in order to develop better mitigation strategies for farmers who grow these food crops. In this review the prevalence, persistence and ecology of four major foodborne pathogens, Shiga toxin-producing Escherichia coli (STEC), Salmonella, Campylobacter and closely related Arcobacter, and Listeria monocytogenes, in water are discussed. These pathogens have been linked to fresh produce outbreaks, some with devastating consequences, where, in a few cases, the contamination event has been traced to water used for crop production or post-harvest activities. In addition, antimicrobial resistance, methods improvements, including the role of genomics in aiding in the understanding of these pathogens, are discussed. Finally, global initiatives to improve our knowledge base of these pathogens around the world are touched upon.
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Affiliation(s)
- Rebecca L. Bell
- Office of Regulatory Science, Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA; (J.A.K.); (Y.C.); (D.M.); (H.J.K.); (J.Z.); (E.W.B.)
| | - Julie A. Kase
- Office of Regulatory Science, Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA; (J.A.K.); (Y.C.); (D.M.); (H.J.K.); (J.Z.); (E.W.B.)
| | - Lisa M. Harrison
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, Laurel, MD 20708, USA; (L.M.H.); (K.V.B.); (U.B.)
| | - Kannan V. Balan
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, Laurel, MD 20708, USA; (L.M.H.); (K.V.B.); (U.B.)
| | - Uma Babu
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, Laurel, MD 20708, USA; (L.M.H.); (K.V.B.); (U.B.)
| | - Yi Chen
- Office of Regulatory Science, Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA; (J.A.K.); (Y.C.); (D.M.); (H.J.K.); (J.Z.); (E.W.B.)
| | - Dumitru Macarisin
- Office of Regulatory Science, Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA; (J.A.K.); (Y.C.); (D.M.); (H.J.K.); (J.Z.); (E.W.B.)
| | - Hee Jin Kwon
- Office of Regulatory Science, Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA; (J.A.K.); (Y.C.); (D.M.); (H.J.K.); (J.Z.); (E.W.B.)
| | - Jie Zheng
- Office of Regulatory Science, Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA; (J.A.K.); (Y.C.); (D.M.); (H.J.K.); (J.Z.); (E.W.B.)
| | - Eric L. Stevens
- Office of the Center Director, Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA;
| | - Jianghong Meng
- Joint Institute for Food Safety and Applied Nutrition, Center for Food Safety and Security Systems, University of Maryland, College Park, MD 20742, USA;
| | - Eric W. Brown
- Office of Regulatory Science, Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA; (J.A.K.); (Y.C.); (D.M.); (H.J.K.); (J.Z.); (E.W.B.)
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Bolukaoto JY, Singh A, Alfinete N, Barnard TG. Occurrence of Hybrid Diarrhoeagenic Escherichia coli Associated with Multidrug Resistance in Environmental Water, Johannesburg, South Africa. Microorganisms 2021; 9:2163. [PMID: 34683484 PMCID: PMC8538365 DOI: 10.3390/microorganisms9102163] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 09/25/2021] [Accepted: 09/27/2021] [Indexed: 12/20/2022] Open
Abstract
This study was undertaken to determine the virulence and antibiotic resistance profiles of diarrhoeagenic Escherichia coli (DEC) in environmental waters of Johannesburg, South Africa. Samples were collected and cultured on selective media. An 11-plex PCR assay was used to differentiate five DEC, namely: enteroaggregative (EAEC), enterohaemorrhagic (EHEC), enteroinvasive (EIEC), enteropathogenic (EPEC) and enterotoxigenic (ETEC). The antibiotic resistance profile of isolates was determined using the VITEK®-2 automated system. The virulence profiles of 170 E. coli tested showed that 40% (68/170) were commensals and 60% (102/170) were pathogenic. EPEC had a prevalence of 19.2% (32/170), followed by ETEC 11.4% (19/170), EAEC 6% (10/170) and EHEC 3% (5/170). Hybrid DEC carrying a combination of simultaneously two and three pathogenic types was detected in twenty-eight and nine isolates, respectively. The antibiotic susceptibility testing showed isolates with multidrug resistance, including cefuroxime (100%), ceftazidime (86%), cefotaxime (81%) and cefepime (79%). This study highlighted the widespread occurrence of DEC and antibiotic resistance strains in the aquatic ecosystem of Johannesburg. The presence of hybrid pathotypes detected in this study is alarming and might lead to more severe diseases. There is a necessity to enhance surveillance in reducing the propagation of pathogenic and antibiotic-resistant strains in this area.
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Affiliation(s)
| | | | | | - Tobias G. Barnard
- Water and Health Research Centre, University of Johannesburg, Doornfontein 2092, South Africa; (J.Y.B.); (A.S.); (N.A.)
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13
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Dungan RS, Bjorneberg DL. Antimicrobial Resistance in Escherichia coli and Enterococcal Isolates From Irrigation Return Flows in a High-Desert Watershed. Front Microbiol 2021; 12:660697. [PMID: 34054760 PMCID: PMC8149595 DOI: 10.3389/fmicb.2021.660697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 04/13/2021] [Indexed: 11/25/2022] Open
Abstract
Irrigation return flows (IRFs) collect surface runoff and subsurface drainage, causing them to have elevated contaminant and bacterial levels, and making them a potential source of pollutants. The purpose of this study was to determine antimicrobial susceptibility among Escherichia coli and enterococcal isolates that were collected from IRFs in a south-central Idaho watershed. Environmental isolates can be a potentially important source of antimicrobial resistance (AMR) and IRFs may be one way resistance genes are transported out of agroecosystems. Water samples were collected from nine IRFs and one background site (canal water from Snake River) on a biweekly basis during 2018. Escherichia coli and enterococci were enumerated via a most probable number (MPN) technique, then subsamples were plated on selective media to obtain isolates. Isolates of E. coli (187) or enterococci (185) were tested for antimicrobial susceptibility using Sensititre broth microdilution plates. For E. coli, 13% (25/187) of isolates were resistant to tetracycline, with fewer numbers being resistant to 13 other antimicrobials, with none resistant to gentamicin. While 75% (141/187) of the E. coli isolates were pan-susceptible, 12 multidrug resistance (MDR) patterns with 17 isolates exhibiting resistance to up to seven drug classes (10 antimicrobials). For the enterococcal species, only 9% (16/185) of isolates were pan-susceptible and the single highest resistance was to lincomycin (138/185; 75%) followed by nitrofurantoin (56/185; 30%) and quinupristin/dalfopristin (34/185; 18%). In addition, 13 enterococcal isolates belonging to Enterococcus faecalis, Enterococcus faecium, Enterococcus casseliflavus, and Enterococcus thailandicus, were determined to be MDR to up to six different antimicrobial drug classes. None of the enterococcal isolates were resistant to gentamycin, linezolid, tigecycline, and vancomycin.
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Affiliation(s)
- Robert S Dungan
- Northwest Irrigation and Soils Research Laboratory, Agricultural Research Service, United States Department of Agriculture, Kimberly, ID, United States
| | - David L Bjorneberg
- Northwest Irrigation and Soils Research Laboratory, Agricultural Research Service, United States Department of Agriculture, Kimberly, ID, United States
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15
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Ogura Y, Ueda T, Nukazawa K, Hiroki H, Xie H, Arimizu Y, Hayashi T, Suzuki Y. The level of antimicrobial resistance of sewage isolates is higher than that of river isolates in different Escherichia coli lineages. Sci Rep 2020; 10:17880. [PMID: 33087784 PMCID: PMC7578040 DOI: 10.1038/s41598-020-75065-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 10/09/2020] [Indexed: 01/14/2023] Open
Abstract
The dissemination of antimicrobial-resistant bacteria in environmental water is an emerging concern in medical and industrial settings. Here, we analysed the antimicrobial resistance of Escherichia coli isolates from river water and sewage by the use of a combined experimental phenotypic and whole-genome-based genetic approach. Among the 283 tested strains, 52 were phenotypically resistant to one or more antimicrobial agents. The E. coli isolates from the river and sewage samples were phylogenetically indistinguishable, and the antimicrobial-resistant strains were dispersedly distributed in a whole-genome-based phylogenetic tree. The prevalence of antimicrobial-resistant strains as well as the number of antimicrobials to which they were resistant were higher in sewage samples than in river samples. Antimicrobial resistance genes were more frequently detected in strains from sewage samples than in those from river samples. We also found that 16 river isolates that were classified as Escherichia cryptic clade V were susceptible to all the antimicrobials tested and were negative for antimicrobial resistance genes. Our results suggest that E. coli strains may acquire antimicrobial resistance genes more frequently and/or antimicrobial-resistant E. coli strains may have higher rates of accumulation and positive selection in sewage than in rivers, irrespective of their phylogenetic distribution.
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Affiliation(s)
- Yoshitoshi Ogura
- Division of Microbiology, Department of Infectious Medicine, Kurume University School of Medicine, Kurume, Fukuoka, 830-0011, Japan. .,Department of Bacteriology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan.
| | - Takuya Ueda
- Department of Civil and Environmental Engineering, Faculty of Engineering, University of Miyazaki, Miyazaki, 889-2192, Japan
| | - Kei Nukazawa
- Department of Civil and Environmental Engineering, Faculty of Engineering, University of Miyazaki, Miyazaki, 889-2192, Japan
| | - Hayate Hiroki
- Department of Civil and Environmental Engineering, Faculty of Engineering, University of Miyazaki, Miyazaki, 889-2192, Japan
| | - Hui Xie
- Department of Civil and Environmental Engineering, Faculty of Engineering, University of Miyazaki, Miyazaki, 889-2192, Japan
| | - Yoko Arimizu
- Department of Bacteriology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan.,Department of Medicine and Biosystemic Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Tetsuya Hayashi
- Department of Bacteriology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Yoshihiro Suzuki
- Department of Civil and Environmental Engineering, Faculty of Engineering, University of Miyazaki, Miyazaki, 889-2192, Japan.
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16
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Devane ML, Moriarty E, Weaver L, Cookson A, Gilpin B. Fecal indicator bacteria from environmental sources; strategies for identification to improve water quality monitoring. WATER RESEARCH 2020; 185:116204. [PMID: 32745743 DOI: 10.1016/j.watres.2020.116204] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 07/13/2020] [Accepted: 07/19/2020] [Indexed: 06/11/2023]
Abstract
In tropical to temperate environments, fecal indicator bacteria (FIB), such as enterococci and Escherichia coli, can persist and potentially multiply, far removed from their natural reservoir of the animal gut. FIB isolated from environmental reservoirs such as stream sediments, beach sand and vegetation have been termed "naturalized" FIB. In addition, recent research suggests that the intestines of poikilothermic animals such as fish may be colonized by enterococci and E. coli, and therefore, these animals may contribute to FIB concentrations in the aquatic environment. Naturalized FIB that are derived from fecal inputs into the environment, and subsequently adapted to maintain their population within the non-host environment are termed "naturalized enteric FIB". In contrast, an additional theory suggests that some "naturalized" FIB diverged from enteric FIB many millions of years ago and are now normal inhabitants of the environment where they are referred to as "naturalized non-enteric FIB". In the case of the Escherichia genus, the naturalized non-enteric members are identified as E. coli during routine water quality monitoring. An over-estimation of the health risk could result when these naturalized, non-enteric FIB, (that is, not derived from avian or mammalian fecal contamination), contribute to water quality monitoring results. It has been postulated that these environmental FIB belonging to the genera Escherichia and Enterococcus can be differentiated from enteric FIB by genetic methods because they lack some of the genes required for colonization of the host intestine, and have acquired genes that aid survival in the environment. Advances in molecular tools such as next generation sequencing will aid the identification of genes peculiar or "enriched" in particular habitats to discriminate between enteric and environmental FIB. In this appraisal, we have reviewed the research studying "naturalized" FIB, and discussed the techniques for their differentiation from enteric FIB. This differentiation includes the important distinction between enteric FIB derived from fresh and non-recent fecal inputs, and those truly non-enteric environmental microbes, which are currently identified as FIB during routine water quality monitoring. The inclusion of tools for the identification of naturalized FIB (enteric or environmental) would be a valuable resource for future studies assessing water quality.
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Affiliation(s)
- Megan L Devane
- Institute of Environmental Science and Research Ltd., 27 Creyke Rd, Ilam, Christchurch, New Zealand.
| | - Elaine Moriarty
- Institute of Environmental Science and Research Ltd., 27 Creyke Rd, Ilam, Christchurch, New Zealand
| | - Louise Weaver
- Institute of Environmental Science and Research Ltd., 27 Creyke Rd, Ilam, Christchurch, New Zealand
| | - Adrian Cookson
- AgResearch Ltd., Hopkirk Research Institute, Massey University, Palmerston North, New Zealand; mEpiLab, School of Veterinary Sciences, Massey University, Palmerston North, New Zealand
| | - Brent Gilpin
- Institute of Environmental Science and Research Ltd., 27 Creyke Rd, Ilam, Christchurch, New Zealand
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Cho S, Hiott LM, Woodley TA, Frye JG, Jackson CR. Evaluation of a new chromogenic agar for the detection of environmental Enterococcus. J Microbiol Methods 2020; 178:106082. [PMID: 33039542 DOI: 10.1016/j.mimet.2020.106082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 10/02/2020] [Accepted: 10/03/2020] [Indexed: 11/28/2022]
Abstract
CHROMagar Enterococcus (CHR), a new chromogenic medium not yet available for commercial purchase, was evaluated for the isolation of Enterococcus from environmental water samples. Its performance was evaluated in comparison to commercially available media, Enterococcosel agar and m-Enterococcus agar. Three consecutive tests were conducted with each test being performed with a newer batch of the CHR medium with improved media composition per batch. The recovery rate, positive predictive value, and sensitivity of the CHR medium improved with the subsequent re-formulation of the media components from 93.9%, 63%, and 92.6%, respectively, with the first batch of CHR, to 96.2%, 97.4%, and 95.7%, respectively, with the newest batch of CHR. The results showed that the newer batches of CHR performed better than the previous versions and are comparable to the other two commercial media tested. The CHR medium has been developed to decrease the turnaround time to approximately 18 h and be read more easily due to bigger colony morphology. The superior growth of colonies on CHR compared with other media in a shorter period of time can aid in the early detection of enterococci and may offer a user-friendly alternative to other media for the isolation of enterococci.
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Affiliation(s)
- Sohyun Cho
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, United States Department of Agriculture, Agricultural Research Service, Athens, GA 30605, USA.
| | - Lari M Hiott
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, United States Department of Agriculture, Agricultural Research Service, Athens, GA 30605, USA.
| | - Tiffanie A Woodley
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, United States Department of Agriculture, Agricultural Research Service, Athens, GA 30605, USA.
| | - Jonathan G Frye
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, United States Department of Agriculture, Agricultural Research Service, Athens, GA 30605, USA.
| | - Charlene R Jackson
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, United States Department of Agriculture, Agricultural Research Service, Athens, GA 30605, USA.
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Ito Y, Shrestha Malla S, Bhattarai AP, Haramoto E, Shindo J, Nishida K. Waterborne diarrhoeal infection risk from multiple water sources and the impact of an earthquake. JOURNAL OF WATER AND HEALTH 2020; 18:464-476. [PMID: 32833674 DOI: 10.2166/wh.2020.223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In the Kathmandu Valley of Nepal, locals depend on multiple water sources due to the limited access to safe water, which is a great global concern regarding its impact on human health. This study aimed to compare the infection risk of diarrhoea from multiple water sources with different concentrations of Escherichia coli among water supply areas and evaluate the impact of changing water sources due to the Gorkha earthquake on the infection risk. The concentration of enteropathogenic E. coli was estimated in samples of piped water, jar water, groundwater, and tanker water, which were collected in the Valley. The volume of each water ingestion was determined based on a questionnaire survey and considering drinking and bathing sources. The highest estimated risk was observed for households drinking groundwater from shallow dug wells, followed by tanker water. The estimated risk implied the regional disparity due to various water sources with different quality. After the earthquake, the ratio of households drinking only jar water increased, and the estimated risk decreased. The damage on piped water supply, the decrease of tanker water availability and the decrease of residents' trust in groundwater quality presumably enhanced the consumption of jar water despite its high price.
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Affiliation(s)
- Yuri Ito
- Special Graduates Program on River Basin Environmental Science, University of Yamanashi, Kofu, Yamanashi 400-8511, Japan
| | - Sadhana Shrestha Malla
- Interdisciplinary Centre for River Basin Environment (ICRE), University of Yamanashi, Kofu, Yamanashi 400-8511, Japan E-mail:
| | | | - Eiji Haramoto
- Interdisciplinary Centre for River Basin Environment (ICRE), University of Yamanashi, Kofu, Yamanashi 400-8511, Japan E-mail:
| | - Junko Shindo
- Interdisciplinary Centre for River Basin Environment (ICRE), University of Yamanashi, Kofu, Yamanashi 400-8511, Japan E-mail:
| | - Kei Nishida
- Interdisciplinary Centre for River Basin Environment (ICRE), University of Yamanashi, Kofu, Yamanashi 400-8511, Japan E-mail:
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19
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Kim S, Bradshaw R, Kulkarni P, Allard S, Chiu PC, Sapkota AR, Newell MJ, Handy ET, East CL, Kniel KE, Sharma M. Zero-Valent Iron-Sand Filtration Reduces Escherichia coli in Surface Water and Leafy Green Growing Environments. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2020. [DOI: 10.3389/fsufs.2020.00112] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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20
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Cho S, Jackson C, Frye J. The prevalence and antimicrobial resistance phenotypes of
Salmonella
,
Escherichia coli
and
Enterococcus
sp. in surface water. Lett Appl Microbiol 2020; 71:3-25. [DOI: 10.1111/lam.13301] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 04/09/2020] [Accepted: 04/13/2020] [Indexed: 12/25/2022]
Affiliation(s)
- S. Cho
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit United States Department of Agriculture, Agricultural Research Service Athens GA United States of America
| | - C.R. Jackson
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit United States Department of Agriculture, Agricultural Research Service Athens GA United States of America
| | - J.G. Frye
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit United States Department of Agriculture, Agricultural Research Service Athens GA United States of America
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21
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Cho S, Hiott LM, McDonald JM, Barrett JB, McMillan EA, House SL, Adams ES, Frye JG, Jackson CR. Diversity and antimicrobial resistance of Enterococcus from the Upper Oconee Watershed, Georgia. J Appl Microbiol 2020; 128:1221-1233. [PMID: 31834656 DOI: 10.1111/jam.14550] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 11/15/2019] [Accepted: 12/03/2019] [Indexed: 01/01/2023]
Abstract
AIM It is well-known that enterococci are abundant in the environment; however, the role of surface water as a reservoir of antimicrobial-resistant enterococci remains largely undefined. In this study, surface water samples were collected over a 2-year period from the Upper Oconee watershed, Athens, GA to examine enterococci and their antimicrobial resistance. METHODS AND RESULTS Approximately 97% (445/458) of the samples were positive for enterococci and a total of 637 enterococci were isolated. The predominant species were Enterococcus casseliflavus (33·6%) followed by Enterococcus faecalis (26·5%) and Enterococcus hirae (13·2%). Regardless of species, the highest levels of resistance were to lincomycin (88·5%) and tetracycline (13%); isolates also exhibited resistance to newer antimicrobials, daptomycin (8·9%) and tigecycline (6·4%). Multidrug resistance (resistance ≥3 antimicrobial classes) was observed to as many as five classes of antimicrobials. Resistant enterococci appeared to be randomly dispersed over the seasons rather than clustered by species or antimicrobial resistance. CONCLUSIONS This study demonstrated that surface waters contain a large population of diverse species of antimicrobial-resistant enterococci, including resistance to new antimicrobials. SIGNIFICANCE AND IMPACT OF THE STUDY These results may indicate the potential of human intestinal illness and/or colonization of the human gut with resistant enterococci as enterococci correlate with increased disease risk to humans during recreational exposure to water.
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Affiliation(s)
- S Cho
- Department of Microbiology, University of Georgia, Athens, GA, USA
| | - L M Hiott
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, USDA-ARS Russell Research Center, Athens, GA, USA
| | - J M McDonald
- Lewis F. Rogers Institute for Environmental and Spatial Analysis, University of North Georgia, Oakwood, GA, USA
| | - J B Barrett
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, USDA-ARS Russell Research Center, Athens, GA, USA
| | - E A McMillan
- Department of Microbiology, University of Georgia, Athens, GA, USA
| | - S L House
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, USDA-ARS Russell Research Center, Athens, GA, USA
| | - E S Adams
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, USDA-ARS Russell Research Center, Athens, GA, USA
| | - J G Frye
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, USDA-ARS Russell Research Center, Athens, GA, USA
| | - C R Jackson
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, USDA-ARS Russell Research Center, Athens, GA, USA
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Parks S, Joyner JL, Nusnbaum M. Reaching a Large Urban Undergraduate Population through Microbial Ecology Course-Based Research Experiences. JOURNAL OF MICROBIOLOGY & BIOLOGY EDUCATION 2020; 21:jmbe-21-17. [PMID: 32313597 PMCID: PMC7148149 DOI: 10.1128/jmbe.v21i1.2047] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 02/14/2020] [Indexed: 05/09/2023]
Abstract
Traditional postsecondary education is making progress on embracing the diversity of student backgrounds and experiences while preparing them for the demands of STEM careers. Course-based undergraduate research experiences (CUREs) are effective tools to concurrently achieve many student and faculty goals: facilitating training of students, building career competencies, generating publishable research results and enabling research experiences where students apply their knowledge and interest. Georgia State University is not unique with a high student demand for research experiences and mentors that is greater than traditional research faculty labs can accommodate. Georgia State University is, however, unique in that it is a demographically diverse campus which serves minority and non-traditional students (i.e., second career and veterans) and is also rapidly growing. Therefore, to enhance the microbiology curriculum and facilitate authentic research experiences for the growing number of biology majors, a cluster of course-based research experiences in microbial ecology was developed. A former research lab space was converted to a collaborative teaching lab to serve the growth in course offerings, as well as to accommodate multiple microbial ecology research projects occurring in the same space. The courses offered appeal to students, build on the strengths of faculty experiences, and facilitate collaboration amongst students and with the greater Atlanta community. To ensure that our CUREs are accessible to the diverse students in our department, we addressed a variety of logistical and curricular challenges. Solutions to such challenges align with the goals of the university to offer research and signature experiences to ensure students are included and trained in STEM skills.
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Affiliation(s)
- Samantha Parks
- Department of Biology, Georgia State University, Atlanta, GA 30302
| | | | - Matthew Nusnbaum
- Department of Biology, Georgia State University, Atlanta, GA 30302
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23
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Cho S, Gupta SK, McMillan EA, Sharma P, Ramadan H, Jové T, Jackson CR, Frye JG. Genomic Analysis of Multidrug-Resistant Escherichia coli from Surface Water in Northeast Georgia, United States: Presence of an ST131 Epidemic Strain Containing blaCTX-M-15 on a Phage-Like Plasmid. Microb Drug Resist 2019; 26:447-455. [PMID: 31725354 DOI: 10.1089/mdr.2019.0306] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Surface water is suspected of playing a role in the development and spread of antimicrobial-resistant (AR) bacteria, including human pathogens. In our previous study, 496 Escherichia coli isolates were recovered from water samples collected over a 2-year period from the Upper Oconee watershed, Athens, GA, United States, of which 34 (6.9%) were AR isolates. Of these, six isolates were selected based on their multidrug resistance (MDR) phenotypes, the presence of mobile genetic elements, and their pathogenic potential and were subjected to whole-genome sequence (WGS) analysis to enhance our understanding of environmental MDR E. coli isolates. This study is the first report on genomic characterization of MDR E. coli from environmental water in the United States through a WGS approach. The sequences of the six MDR E. coli isolates were analyzed and the locations of their AR genes were identified. One of the E. coli isolates was an ST131 epidemic strain, which also produced an extended-spectrum β-lactamase encoded by the blaCTX-M-15 gene, carried on a plasmid that is a member of a very rarely reported family of phage-like plasmids. This is the first time an in-depth sequence analysis has been done on a blaCTX-M-15- containing phage-like plasmid, the presence of which suggests a new emerging mechanism of AR gene transmission.
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Affiliation(s)
- Sohyun Cho
- Department of Microbiology, University of Georgia, Athens, Georgia, USA
| | - Sushim K Gupta
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Athens, Georgia, USA
| | | | - Poonam Sharma
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Athens, Georgia, USA
| | - Hazem Ramadan
- Hygiene and Zoonoses Department, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Thomas Jové
- Univ. Limoges, INSERM, CHU Limoges, RESINFIT, U1092, Limoges, France
| | - Charlene R Jackson
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Athens, Georgia, USA
| | - Jonathan G Frye
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Athens, Georgia, USA
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Cho S, Nguyen HAT, McDonald JM, Woodley TA, Hiott LM, Barrett JB, Jackson CR, Frye JG. Genetic Characterization of Antimicrobial-Resistant Escherichia coli Isolated from a Mixed-Use Watershed in Northeast Georgia, USA. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16193761. [PMID: 31591305 PMCID: PMC6801870 DOI: 10.3390/ijerph16193761] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 10/02/2019] [Accepted: 10/04/2019] [Indexed: 11/16/2022]
Abstract
In order to determine the role of surface water in the development and spread of antibiotic-resistant (AR) bacteria, water samples were collected quarterly from 2015 to 2016 from a mixed-use watershed in Georgia. In our previous study, 496 Escherichia coli were isolated from surface water, out of which, 34 isolates were resistant to antimicrobials. For the current study, these 34 AR E. coli were characterized using pulsed-field gel electrophoresis, AR gene detection, plasmid replicon typing, class I integron detection, and multi-locus sequence typing. Genes were identified as conferring resistance to azithromycin (mph(A)); β-lactams (blaCMY, blaCTX, blaTEM); chloramphenicol (floR); streptomycin (strA, strB); sulfisoxazole (sul1, sul2); tetracycline (tetA, tetB, tetC); and trimethoprim/sulfamethoxazole (dhfr5, dhfr12). Five ciprofloxacin- and/or nalidixic-resistant isolates contained point mutations in gyrA and/or parC. Most of the isolates (n = 28) carried plasmids and three were positive for class I integrons. Twenty-nine sequence types (ST) were detected, including three epidemic urinary-tract-infection-associated ST131 isolates. One of the ST131 E. coli isolates exhibited an extended-spectrum β-lactamase (ESBL) phenotype and carried blaCTX-M-15 and blaTEM-1. To our knowledge, this is the first study on the emergence of an ESBL-producing E. coli ST131 from environmental water in the USA, which poses a potential risk to human health through the recreational, agricultural, or municipal use of this natural resource. This study identified E. coli with AR mechanisms to commonly used antimicrobials and carrying mobile genetic elements, which could transfer AR genes to other bacteria in the aquatic environment.
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Affiliation(s)
- Sohyun Cho
- Department of Microbiology, University of Georgia, Athens, GA 30602, USA.
| | - Hoang Anh Thi Nguyen
- Department of Microbiology, University of Georgia, Athens, GA 30602, USA.
- (Present) Houston Methodist Research Institute, Houston, TX 77030, USA.
| | - Jacob M McDonald
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA 30602, USA.
- Southeast Coast Network, National Park Service, Athens, GA 30605, USA.
| | - Tiffanie A Woodley
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, United States Department of Agriculture, Agricultural Research Service, U.S. National Poultry Research Center, Athens, GA 30605, USA.
| | - Lari M Hiott
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, United States Department of Agriculture, Agricultural Research Service, U.S. National Poultry Research Center, Athens, GA 30605, USA.
| | - John B Barrett
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, United States Department of Agriculture, Agricultural Research Service, U.S. National Poultry Research Center, Athens, GA 30605, USA.
| | - Charlene R Jackson
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, United States Department of Agriculture, Agricultural Research Service, U.S. National Poultry Research Center, Athens, GA 30605, USA.
| | - Jonathan G Frye
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, United States Department of Agriculture, Agricultural Research Service, U.S. National Poultry Research Center, Athens, GA 30605, USA.
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Haymaker J, Sharma M, Parveen S, Hashem F, May EB, Handy ET, White C, East C, Bradshaw R, Micallef SA, Callahan MT, Allard S, Anderson B, Craighead S, Gartley S, Vanore A, Kniel KE, Solaiman S, Bui A, Murray R, Craddock HA, Kulkarni P, Foust D, Duncan R, Taabodi M, Sapkota AR. Prevalence of Shiga-toxigenic and atypical enteropathogenic Escherichia coli in untreated surface water and reclaimed water in the Mid-Atlantic U.S. ENVIRONMENTAL RESEARCH 2019; 172:630-636. [PMID: 30878734 DOI: 10.1016/j.envres.2019.02.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 02/08/2019] [Accepted: 02/12/2019] [Indexed: 06/09/2023]
Abstract
The microbial quality of irrigation water has increasingly become a concern as a source of contamination for fruits and vegetables. Non-traditional sources of water are being used by more and more growers in smaller, highly diversified farms in the Mid-Atlantic region of the U.S. Shiga-toxigenic E. coli (STEC) have been responsible for several outbreaks of infections associated with the consumption of leafy greens. Our study evaluated the prevalence of the "big seven" STEC serogroups and the associated enterohemorrhagic E. coli (EHEC) virulence factors (VF) genes in conventional and nontraditional irrigation waters in the Mid-Atlantic region of the U.S. Water samples (n = 510) from 170 sampling events were collected from eight untreated surface water sites, two wastewater reclamation facilities, and one vegetable processing plant, over a 12-month period. Ten liters of water were filtered through Modified Moore swabs (MMS); swabs were then enriched into Universal Pre-enrichment Broth (UPB), followed by enrichment into non-O157 STEC R&F broth and isolation on R & F non-O157 STEC chromogenic plating medium. Isolates (n = 2489) from enriched MMS from water samples were screened for frequently reported STEC serogroups that cause foodborne illness: O26, O45, O103, O111, O121, O145, and O157, along with VF genes stx1, stx2, eae, and ehxA. Through this screening process, STEC isolates were found in 2.35% (12/510) of water samples, while 9.0% (46/510) contained an atypical enteropathogenic E. coli (aEPEC) isolate. The eae gene (n = 88 isolates) was the most frequently detected EHEC VF of the isolates screened. The majority of STEC isolates (stx1 or stx2) genes mainly came from either a pond or reclamation pond water site on two specific dates, potentially indicating that these isolates were not spatially or temporally distributed among the sampling sites. STEC isolates at reclaimed water sites may have been introduced after wastewater treatment. None of the isolates containing eae were determined to be Escherichia albertii. Our work showed that STEC prevalence in Mid-Atlantic untreated surface waters over a 12-month period was lower than the prevalence of atypical EPEC.
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Affiliation(s)
- Joseph Haymaker
- University of Maryland Eastern Shore, Department of Agriculture and Resource Sciences, Princess Anne, MD, United States
| | - Manan Sharma
- United States Department of Agriculture, Agricultural Research Service, Northeast Area, Beltsville Agricultural Research Center, Environmental Microbial and Food Safety Laboratory, Beltsville, MD, United States.
| | - Salina Parveen
- University of Maryland Eastern Shore, Department of Agriculture and Resource Sciences, Princess Anne, MD, United States
| | - Fawzy Hashem
- University of Maryland Eastern Shore, Department of Agriculture and Resource Sciences, Princess Anne, MD, United States
| | - Eric B May
- University of Maryland Eastern Shore, Department of Agriculture and Resource Sciences, Princess Anne, MD, United States
| | - Eric T Handy
- United States Department of Agriculture, Agricultural Research Service, Northeast Area, Beltsville Agricultural Research Center, Environmental Microbial and Food Safety Laboratory, Beltsville, MD, United States
| | - Chanelle White
- University of Maryland Eastern Shore, Department of Agriculture and Resource Sciences, Princess Anne, MD, United States
| | - Cheryl East
- United States Department of Agriculture, Agricultural Research Service, Northeast Area, Beltsville Agricultural Research Center, Environmental Microbial and Food Safety Laboratory, Beltsville, MD, United States
| | - Rhodel Bradshaw
- United States Department of Agriculture, Agricultural Research Service, Northeast Area, Beltsville Agricultural Research Center, Environmental Microbial and Food Safety Laboratory, Beltsville, MD, United States
| | - Shirley A Micallef
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, MD, United States
| | - Mary Theresa Callahan
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, MD, United States
| | - Sarah Allard
- Maryland Institute for Applied Environmental Health, University of Maryland School of Public Health, College Park, MD, United States
| | - Brienna Anderson
- University of Delaware, Department of Animal and Food Sciences, Newark, DE 19716, United States
| | - Shani Craighead
- University of Delaware, Department of Animal and Food Sciences, Newark, DE 19716, United States
| | - Samantha Gartley
- University of Delaware, Department of Animal and Food Sciences, Newark, DE 19716, United States
| | - Adam Vanore
- University of Delaware, Department of Animal and Food Sciences, Newark, DE 19716, United States
| | - Kalmia E Kniel
- University of Delaware, Department of Animal and Food Sciences, Newark, DE 19716, United States
| | - Sultana Solaiman
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, MD, United States
| | - Anthony Bui
- Maryland Institute for Applied Environmental Health, University of Maryland School of Public Health, College Park, MD, United States
| | - Rianna Murray
- Maryland Institute for Applied Environmental Health, University of Maryland School of Public Health, College Park, MD, United States
| | - Hillary A Craddock
- Maryland Institute for Applied Environmental Health, University of Maryland School of Public Health, College Park, MD, United States
| | - Prachi Kulkarni
- Maryland Institute for Applied Environmental Health, University of Maryland School of Public Health, College Park, MD, United States
| | - Derek Foust
- University of Maryland Eastern Shore, Department of Agriculture and Resource Sciences, Princess Anne, MD, United States
| | - Rico Duncan
- University of Maryland Eastern Shore, Department of Agriculture and Resource Sciences, Princess Anne, MD, United States
| | - Maryam Taabodi
- University of Maryland Eastern Shore, Department of Agriculture and Resource Sciences, Princess Anne, MD, United States
| | - Amy R Sapkota
- Maryland Institute for Applied Environmental Health, University of Maryland School of Public Health, College Park, MD, United States
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