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Rothstein AP, Jesser KJ, Feistel DJ, Konstantinidis KT, Trueba G, Levy K. Population genomics of diarrheagenic Escherichia coli uncovers high connectivity between urban and rural communities in Ecuador. INFECTION, GENETICS AND EVOLUTION : JOURNAL OF MOLECULAR EPIDEMIOLOGY AND EVOLUTIONARY GENETICS IN INFECTIOUS DISEASES 2023; 113:105476. [PMID: 37392822 PMCID: PMC10599324 DOI: 10.1016/j.meegid.2023.105476] [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: 05/07/2023] [Revised: 05/11/2023] [Accepted: 06/28/2023] [Indexed: 07/03/2023]
Abstract
Human movement may be an important driver of transmission dynamics for enteric pathogens but has largely been underappreciated except for international 'travelers' diarrhea or cholera. Phylodynamic methods, which combine genomic and epidemiological data, are used to examine rates and dynamics of disease matching underlying evolutionary history and biogeographic distributions, but these methods often are not applied to enteric bacterial pathogens. We used phylodynamics to explore the phylogeographic and evolutionary patterns of diarrheagenic E. coli in northern Ecuador to investigate the role of human travel in the geographic distribution of strains across the country. Using whole genome sequences of diarrheagenic E. coli isolates, we built a core genome phylogeny, reconstructed discrete ancestral states across urban and rural sites, and estimated migration rates between E. coli populations. We found minimal structuring based on site locations, urban vs. rural locality, pathotype, or clinical status. Ancestral states of phylogenomic nodes and tips were inferred to have 51% urban ancestry and 49% rural ancestry. Lack of structuring by location or pathotype E. coli isolates imply highly connected communities and extensive sharing of genomic characteristics across isolates. Using an approximate structured coalescent model, we estimated rates of migration among circulating isolates were 6.7 times larger for urban towards rural populations compared to rural towards urban populations. This suggests increased inferred migration rates of diarrheagenic E. coli from urban populations towards rural populations. Our results indicate that investments in water and sanitation prevention in urban areas could limit the spread of enteric bacterial pathogens among rural populations.
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Affiliation(s)
- Andrew P. Rothstein
- Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA, USA
| | - Kelsey J. Jesser
- Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA, USA
| | - Dorian J. Feistel
- School of a Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - Konstantinos T. Konstantinidis
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- School of a Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - Gabriel Trueba
- Instituto de Microbiología, Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Quito, Pichincha, Ecuador
| | - Karen Levy
- Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA, USA
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Prack McCormick B, Quiroga MP, Álvarez VE, Centrón D, Tittonell P. Antimicrobial resistance dissemination associated with intensive animal production practices in Argentina: A systematic review and meta-analysis. Rev Argent Microbiol 2023; 55:25-42. [PMID: 36137889 DOI: 10.1016/j.ram.2022.07.001] [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] [Received: 09/27/2021] [Revised: 05/20/2022] [Accepted: 07/07/2022] [Indexed: 10/14/2022] Open
Abstract
Abuse and misuse of antimicrobial agents has accelerated the spread of antimicrobial-resistant bacteria. The association between antimicrobial-resistant infections in humans and antimicrobial use in agriculture is complex, but well-documented. This study provides a systematic review and meta-analysis of the dissemination of antimicrobial resistance (AMR) to antimicrobials defined as critically important by the WHO, in swine, chicken, and cattle from intensive and extensive production systems in Argentina. We conducted searches in electronic databases (MEDLINE-PubMed, Web of Science, SciELO, the National System of Digital Repositories from Argentina) as well as in the gray literature. Inclusion criteria were epidemiological studies on AMR in the main food-transmitted bacteria, Salmonella spp., Campylobacter spp., Escherichia coli and Enterococcus spp., and mastitis-causing bacteria, isolated from swine, chicken, dairy and beef cattle from Argentina. This study gives evidence for supporting the hypothesis that AMR of common food-transmitted bacteria in Argentina is reaching alarming levels. Meta-analyses followed by subgroup analyses confirmed the association between the prevalence of AMR and (a) animal species (p<0.01) for streptomycin, ampicillin and tetracycline or (b) the animal production system (p<0.05) for streptomycin, cefotaxime, nalidixic acid, ampicillin and tetracycline. Moreover, swine (0.47 [0.29; 0.66]) and intensive production (0.62 [0.34; 0.83]) showed the highest pooled prevalence of multidrug resistance while dairy (0.056 [0.003; 0.524]) and extensive production (0.107 [0.043; 0.240]) showed the lowest. A research gap regarding beef-cattle from feedlot was identified. Finally, there is an urgent need for political measures meant to coordinate and harmonize AMR surveillance and regulate antimicrobial use in animal production.
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Affiliation(s)
- Barbara Prack McCormick
- Universidad Nacional de Lomas de Zamora, Facultad de Ciencias Agrarias, RP N˚4 km 2 (1836), Llavallol, Buenos Aires, Argentina.
| | - María P Quiroga
- Laboratorio de Investigaciones en Mecanismos de Resistencia a Antibióticos, Instituto de Investigaciones en Microbiología y Parasitología Médica, Facultad de Medicina, Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas (IMPaM, UBA-CONICET), Paraguay 2157 (PC 1121), Ciudad Autónoma de Buenos Aires, Argentina
| | - Verónica E Álvarez
- Laboratorio de Investigaciones en Mecanismos de Resistencia a Antibióticos, Instituto de Investigaciones en Microbiología y Parasitología Médica, Facultad de Medicina, Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas (IMPaM, UBA-CONICET), Paraguay 2157 (PC 1121), Ciudad Autónoma de Buenos Aires, Argentina
| | - Daniela Centrón
- Laboratorio de Investigaciones en Mecanismos de Resistencia a Antibióticos, Instituto de Investigaciones en Microbiología y Parasitología Médica, Facultad de Medicina, Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas (IMPaM, UBA-CONICET), Paraguay 2157 (PC 1121), Ciudad Autónoma de Buenos Aires, Argentina.
| | - Pablo Tittonell
- Agroecology, Environment and Systems Group, Instituto de Investigaciones Forestales y Agropecuarias de Bariloche, Instituto Nacional de Tecnologia Agropecuaria - Consejo Nacional de Investigaciones Científicas y Técnicas (IFAB, INTA-CONICET), Modesta Victoria 4450 - CC 277 (8400), San Carlos de Bariloche, Río Negro, Argentina; Groningen Institute of Evolutionary Life Sciences, Groningen University, PO Box 11103, 9700 CC Groningen, The Netherlands
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Global Travel and Antimicrobial Resistance: a Challenge for Stewardship. CURRENT TREATMENT OPTIONS IN INFECTIOUS DISEASES 2022. [DOI: 10.1007/s40506-021-00257-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Shinde RA, Adole VA, Jagdale BS. Synthesis, Computational, Antibacterial and Antifungal Investigation of Two Tri-Fluorinated Chalcones of 1-(2,3-Dihydrobenzo[ b][1,4]dioxin-6-yl)ethan-1-one. Polycycl Aromat Compd 2021. [DOI: 10.1080/10406638.2021.1977346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Rahul A. Shinde
- Department of Chemistry, Mahatma Gandhi Vidyamandir’s Arts, Science and Commerce College, Manmad (Affiliated to Savitribai Phule Pune University, Pune), Nashik, MS, India
| | - Vishnu A. Adole
- Department of Chemistry, Mahatma Gandhi Vidyamandir’s Arts, Science and Commerce College, Manmad (Affiliated to Savitribai Phule Pune University, Pune), Nashik, MS, India
| | - Bapu S. Jagdale
- Department of Chemistry, Mahatma Gandhi Vidyamandir’s Loknete Vyankatrao Hiray Arts, Science and Commerce College Panchavati (Affiliated to Savitribai Phule Pune University, Pune), Nashik, MS, India
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Microwave prompted solvent-free synthesis of new series of heterocyclic tagged 7-arylidene indanone hybrids and their computational, antifungal, antioxidant, and cytotoxicity study. Bioorg Chem 2021; 115:105259. [PMID: 34426144 DOI: 10.1016/j.bioorg.2021.105259] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 07/25/2021] [Accepted: 08/06/2021] [Indexed: 12/23/2022]
Abstract
In this study, we report the expeditious synthesis of ten new antifungal and antioxidant agents containing heterocyclic linked 7-arylidene indanone moiety. The solvent-free microwave technique, ample substrate scope, superfast synthesis, and very simple operation are noteworthy features of this protocol. Antifungal activities of the newly synthesized compounds were evaluated against four fungal strains namely Rhizophus oryzae, Mucor mucido, Aspergillus niger, and Candida albicans. Most of the compounds were shown strong inhibition of the investigated fungal agents. In vitro, antioxidant potential against DPPH and OH radicals affirmed that the synthesized compounds are good to excellent radicals scavenging agents. The cytotoxicity data of the synthesized compounds towards HL-60 cells uncovered that the synthesized compounds display very low to negligible cytotoxicity. The structural and quantum chemical parameters of the synthesized compounds were explored by employing density functional theory (DFT) at B3LYP functional using 6-311G(d,p) basis set. The compound 3a is discussed in detail for the theoretical and experimental correlation. Time-dependent density functional theory (TD-DFT) at CAM-B3LYP functional with 6-311G(d,p) basis set was used for the electronic absorption study in the gas phase and indichloromethane and benzene solvents. The UV-Visible absorption peaks and fundamental vibrational wavenumbers were computed and a good agreement between observed and theoretical results has been achieved. From the DFT and antifungal activity correlation, it has been found that the 7-heteroarylidene indanones with more stabilized LUMO energy levels display good antifungal potential.
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Vidyarthi AJ, Das A, Chaudhry R. Antimicrobial resistance and COVID-19 syndemic: Impact on public health. Drug Discov Ther 2021; 15:124-129. [PMID: 34234060 DOI: 10.5582/ddt.2021.01052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The COVID -19 pandemic has had a catastrophic impact on the global economy and the healthcare industry. Unfortunately, the scientific community still hasn't discovered a definite cure for this virus. Also, owing to the unscrupulous use of antibiotics in wake of the current situation, another ongoing pandemic of antimicrobial resistance (AMR) has been entirely eclipsed. However, increased compliance to infection control measures like hand hygiene (both at hospital and community level), and restricted travel might be favorable. It is evident that the AMR strategies will be impacted disproportionately varying with the respective policies followed by the countries and hospitals to deal with the pandemic. The vaccination drive initiated globally has provided a glimmer of hope. In this article, the possible reciprocity between the two contemporaneous pandemics has been addressed. The world needs to be vigilant to punctuate the symphony between these lethal threats to global health. The restraint to combat against AMR will be boosted as our discernment of the problem also changes with the epidemiological interplay becoming more apparent in near future.
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Affiliation(s)
- Ashima Jain Vidyarthi
- Department of Microbiology, All India Institute of Medical Sciences, New Delh, India
| | - Arghya Das
- Department of Microbiology, All India Institute of Medical Sciences, New Delh, India
| | - Rama Chaudhry
- Department of Microbiology, All India Institute of Medical Sciences, New Delh, India
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Peng Y, Liang S, Poonsuk K, On H, Li SW, Maurin MMP, Chan CH, Chan CL, Sin ZY, Tun HM. Role of gut microbiota in travel-related acquisition of extended spectrum β-lactamase-producing Enterobacteriaceae. J Travel Med 2021; 28:6145023. [PMID: 33615366 DOI: 10.1093/jtm/taab022] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 01/18/2021] [Accepted: 02/05/2021] [Indexed: 01/10/2023]
Abstract
BACKGROUND International travel could facilitate the spread of antimicrobial-resistant bacteria including extended spectrum β-lactamase-producing Enterobacteriaceae (ESBL-E). Previous studies, which attempted to understand the role of gut microbiota in the acquisition of antimicrobial resistant bacteria during international travels, are limited to western travellers. METHODS We established a prospective cohort of 90 Hong Kong travellers to investigate gut microbiota determinants and associated risk factors for the acquisition of ESBL-E. Baseline characteristics and travel-associated risk factors were gathered through questionnaires. Faecal samples were collected in 3-4 days before and after travel. Antimicrobial susceptibility of ESBL-E isolates was tested, and gut microbiota were profiled by 16S rDNA amplicon sequencing. Non-parametric tests were used to detect potential associations, and logistic regression models were used to quantify the associations. Random forest models were constructed to identify microbial predictors for ESBL-E acquisition. RESULTS In total, 49 (54.4%) participants were tested negative for ESBL-E colonization before travel and were followed up after travel. A total of 60 ESBL-E isolates were cultured from 20 (40.8%) participants. Having low Actinobacteria richness and low abundance of short-chain fatty acid-producing bacteria in the gut microbiota before travel increased the risk of acquiring ESBL-E and the risk can be further exacerbated by eating raw seafood during travel. Besides, post-travel ESBL-E positive participants had increased abundances of several opportunistic pathogens such as Staphylococcus, Enterococcus, Escherichia/Shigella and Klebsiella. The random forest model integrating pre-travel microbiota and the identified travel-related risk factor could predict ESBL-E acquisition with an area under the curve of 75.4% (95% confidence interval: 57.9-93.0%). CONCLUSIONS In this study, we identified both travel-related risk factors and microbiota predictors for the risk of ESBL-E acquisition. Our results provide foundational knowledge for future developments of microbiota-based interventions to prevent ESBL-E acquisition during international travels.
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Affiliation(s)
- Ye Peng
- HKU-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR 999077, China
| | - Suisha Liang
- HKU-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR 999077, China
| | - Kanchana Poonsuk
- HKU-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR 999077, China
| | - Hilda On
- HKU-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR 999077, China
| | - Sze Wang Li
- HKU-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR 999077, China
| | - Morgan Maxime Pascal Maurin
- HKU-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR 999077, China.,Faculty of Medicine, University of Clermont Auvergne, Clermont-Ferrand 63100, France
| | - Ching Him Chan
- HKU-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR 999077, China
| | - Chak Lun Chan
- HKU-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR 999077, China
| | - Zhen Ye Sin
- HKU-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR 999077, China.,Department of Biosciences, Derham University, Durham DH1 3DE, UK
| | - Hein Min Tun
- HKU-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR 999077, China.,School of Public Health, Nanjing Medical University, Jiangning District, Nanjing 211166, China
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Candida auris Bloodstream Infections in Russia. Antibiotics (Basel) 2020; 9:antibiotics9090557. [PMID: 32872574 PMCID: PMC7559283 DOI: 10.3390/antibiotics9090557] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/22/2020] [Accepted: 08/28/2020] [Indexed: 11/17/2022] Open
Abstract
Candida auris-a fungus (yeast) that can cause hospital outbreaks was first recognized in 2009. The authors report data on 38 cases of C. auris bloodstream infections in multidisciplinary hospitals situated in two distantly located regions of Russia, considering predisposing factors, antifungal susceptibility of isolates, treatment, and outcomes. Interhospital transfers of patients and labor migration contributed to the spread of C. auris. The South Asian lineage of the studied strains was indicated by K143R substitution in ERG11 gene and phylogenetic analysis of internal transcribed spacer and D1-D2 domain. All isolates from C. auris candidemia cases were susceptible to echinocandins. High-level resistance to fluconazole and resistance to amphotericin B were present in the majority of strains. The overall all-cause mortality rate in C. auris bloodstream infections was 55.3% and the 30-day all-cause mortality rate 39.5%. The attributable mortality was 0%. Eradication of C. auris from blood was associated with the favourable outcomes in patients. It was achieved irrespective of whether antifungal preparations within or outside the susceptibility range were administered. Further international surveillance and studies providing consensus guidelines for the management of C. auris infections are needed.
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Fouz N, Pangesti KNA, Yasir M, Al-Malki AL, Azhar EI, Hill-Cawthorne GA, Abd El Ghany M. The Contribution of Wastewater to the Transmission of Antimicrobial Resistance in the Environment: Implications of Mass Gathering Settings. Trop Med Infect Dis 2020; 5:tropicalmed5010033. [PMID: 32106595 PMCID: PMC7157536 DOI: 10.3390/tropicalmed5010033] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/30/2020] [Accepted: 02/15/2020] [Indexed: 12/11/2022] Open
Abstract
Antimicrobial resistance (AMR) is the major issue posing a serious global health threat. Low- and middle-income countries are likely to be the most affected, both in terms of impact on public health and economic burden. Recent studies highlighted the role of resistance networks on the transmission of AMR organisms, with this network being driven by complex interactions between clinical (e.g., human health, animal husbandry and veterinary medicine) and other components, including environmental factors (e.g., persistence of AMR in wastewater). Many studies have highlighted the role of wastewater as a significant environmental reservoir of AMR as it represents an ideal environment for AMR bacteria (ARB) and antimicrobial resistant genes (ARGs) to persist. Although the treatment process can help in removing or reducing the ARB load, it has limited impact on ARGs. ARGs are not degradable; therefore, they can be spread among microbial communities in the environment through horizontal gene transfer, which is the main resistance mechanism in most Gram-negative bacteria. Here we analysed the recent literature to highlight the contribution of wastewater to the emergence, persistence and transmission of AMR under different settings, particularly those associated with mass gathering events (e.g., Hajj and Kumbh Mela).
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Affiliation(s)
- Nour Fouz
- The Westmead Institute for Medical Research, The University of Sydney, Sydney, NSW 2145, Australia;
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Krisna N. A. Pangesti
- School of Public Health, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia; (K.N.A.P.); (G.A.H.-C.)
| | - Muhammad Yasir
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (M.Y.); (E.I.A.)
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Abdulrahman L. Al-Malki
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Esam I. Azhar
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (M.Y.); (E.I.A.)
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Grant A. Hill-Cawthorne
- School of Public Health, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia; (K.N.A.P.); (G.A.H.-C.)
| | - Moataz Abd El Ghany
- The Westmead Institute for Medical Research, The University of Sydney, Sydney, NSW 2145, Australia;
- The Marie Bashir Institute of Infectious Diseases and Biosecurity, The University of Sydney, Sydney, NSW 2145, Australia
- The Westmead Clinical School, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2145, Australia
- Correspondence: or
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Nellums LB, Thompson H, Holmes A, Castro-Sánchez E, Otter JA, Norredam M, Friedland JS, Hargreaves S. Antimicrobial resistance among migrants in Europe: a systematic review and meta-analysis. THE LANCET. INFECTIOUS DISEASES 2018; 18:796-811. [PMID: 29779917 PMCID: PMC6032478 DOI: 10.1016/s1473-3099(18)30219-6] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 01/12/2018] [Accepted: 03/13/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND Rates of antimicrobial resistance (AMR) are rising globally and there is concern that increased migration is contributing to the burden of antibiotic resistance in Europe. However, the effect of migration on the burden of AMR in Europe has not yet been comprehensively examined. Therefore, we did a systematic review and meta-analysis to identify and synthesise data for AMR carriage or infection in migrants to Europe to examine differences in patterns of AMR across migrant groups and in different settings. METHODS For this systematic review and meta-analysis, we searched MEDLINE, Embase, PubMed, and Scopus with no language restrictions from Jan 1, 2000, to Jan 18, 2017, for primary data from observational studies reporting antibacterial resistance in common bacterial pathogens among migrants to 21 European Union-15 and European Economic Area countries. To be eligible for inclusion, studies had to report data on carriage or infection with laboratory-confirmed antibiotic-resistant organisms in migrant populations. We extracted data from eligible studies and assessed quality using piloted, standardised forms. We did not examine drug resistance in tuberculosis and excluded articles solely reporting on this parameter. We also excluded articles in which migrant status was determined by ethnicity, country of birth of participants' parents, or was not defined, and articles in which data were not disaggregated by migrant status. Outcomes were carriage of or infection with antibiotic-resistant organisms. We used random-effects models to calculate the pooled prevalence of each outcome. The study protocol is registered with PROSPERO, number CRD42016043681. FINDINGS We identified 2274 articles, of which 23 observational studies reporting on antibiotic resistance in 2319 migrants were included. The pooled prevalence of any AMR carriage or AMR infection in migrants was 25·4% (95% CI 19·1-31·8; I2 =98%), including meticillin-resistant Staphylococcus aureus (7·8%, 4·8-10·7; I2 =92%) and antibiotic-resistant Gram-negative bacteria (27·2%, 17·6-36·8; I2 =94%). The pooled prevalence of any AMR carriage or infection was higher in refugees and asylum seekers (33·0%, 18·3-47·6; I2 =98%) than in other migrant groups (6·6%, 1·8-11·3; I2 =92%). The pooled prevalence of antibiotic-resistant organisms was slightly higher in high-migrant community settings (33·1%, 11·1-55·1; I2 =96%) than in migrants in hospitals (24·3%, 16·1-32·6; I2 =98%). We did not find evidence of high rates of transmission of AMR from migrant to host populations. INTERPRETATION Migrants are exposed to conditions favouring the emergence of drug resistance during transit and in host countries in Europe. Increased antibiotic resistance among refugees and asylum seekers and in high-migrant community settings (such as refugee camps and detention facilities) highlights the need for improved living conditions, access to health care, and initiatives to facilitate detection of and appropriate high-quality treatment for antibiotic-resistant infections during transit and in host countries. Protocols for the prevention and control of infection and for antibiotic surveillance need to be integrated in all aspects of health care, which should be accessible for all migrant groups, and should target determinants of AMR before, during, and after migration. FUNDING UK National Institute for Health Research Imperial Biomedical Research Centre, Imperial College Healthcare Charity, the Wellcome Trust, and UK National Institute for Health Research Health Protection Research Unit in Healthcare-associated Infections and Antimictobial Resistance at Imperial College London.
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Affiliation(s)
| | | | - Alison Holmes
- Department of Medicine, Imperial College London, London, UK
| | | | | | - Marie Norredam
- Danish Research Centre for Migration Ethnicity and Health, University of Copenhagen, Copenhagen, Denmark; Section of Immigrant Medicine, Department of Infectious Disease, Copenhagen University Hospital, Hvidovre, Denmark
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Park SB, Steadman CS, Chaudhari AA, Pillai SR, Singh SR, Ryan PL, Willard ST, Feugang JM. Proteomic analysis of antimicrobial effects of pegylated silver coated carbon nanotubes in Salmonella enterica serovar Typhimurium. J Nanobiotechnology 2018; 16:31. [PMID: 29587743 PMCID: PMC5870919 DOI: 10.1186/s12951-018-0355-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 03/19/2018] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Synthesis of silver nano-compounds with enhanced antimicrobial effects is of great interest for the development of new antibacterial agents. Previous studies have reported the antibacterial properties of pegylated silver-coated carbon nanotubes (pSWCNT-Ag) showing less toxicity in human cell lines. However, the mechanism underlining the pSWCNT-Ag as a bactericidal agent remained unfolded. Here we assessed the pSWCNT-Ag effects against foodborne pathogenic bacteria growth and proteome profile changes. RESULTS Measurements of bioluminescent imaging, optical density, and bacteria colony forming units revealed dose-dependent and stronger bactericidal activity of pSWCNT-Ag than their non-pegylated counterparts (SWCNT-Ag). In ovo administration of pSWCNT-Ag or phosphate-buffered saline resulted in comparable chicken embryo development and growth. The proteomic analysis, using two-dimensional electrophoresis combined with matrix assisted laser desorption/ionization time of flight/time of flight mass spectrometry, was performed on control and surviving Salmonella enterica serovar Typhimurium to pSWCNT-Ag. A total of 15 proteins (ten up-regulated and five down-regulated) differentially expressed proteins were identified. Functional analyses showed significant reduction of proteins associated with biofilm formation, nutrient and energy metabolism, quorum sensing and maintenance of cell structure and cell motility in surviving S. Typhimurium. In contrast, proteins associated with oxygen stress, DNA protection, starvation, membrane rebuilding, and alternative nutrient formation were induced as the compensatory reaction. CONCLUSIONS This study provides further evidence of the antibacterial effects of pSWCNT-Ag nanocomposites and knowledge of their mechanism of action through various protein changes. The findings may lead to the development of more effective and safe antimicrobial agents.
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Affiliation(s)
- Seong B. Park
- Department of Animal and Dairy Sciences, Mississippi State University, Mississippi State, MS 39762 USA
| | - Christy S. Steadman
- Department of Animal and Dairy Sciences, Mississippi State University, Mississippi State, MS 39762 USA
| | - Atul A. Chaudhari
- Center for Nanobiotechnology Research, Alabama State University, Montgomery, AL USA
| | - Shreekumar R. Pillai
- Center for Nanobiotechnology Research, Alabama State University, Montgomery, AL USA
| | - Shree R. Singh
- Center for Nanobiotechnology Research, Alabama State University, Montgomery, AL USA
| | - Peter L. Ryan
- Department of Animal and Dairy Sciences, Mississippi State University, Mississippi State, MS 39762 USA
- Department of Pathobiology and Population Medicine, Mississippi State University, Mississippi State, MS 39762 USA
| | - Scott T. Willard
- Department of Animal and Dairy Sciences, Mississippi State University, Mississippi State, MS 39762 USA
- Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology, Mississippi State University, Mississippi State, MS 39762 USA
| | - Jean M. Feugang
- Department of Animal and Dairy Sciences, Mississippi State University, Mississippi State, MS 39762 USA
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Zamanlou S, Rezaee MA, Aghazadeh M, Ghotaslou R, Nave HH, Khalili Y. Genotypic Diversity of Multidrug Resistant Shigella species from Iran. Infect Chemother 2018; 50:29-37. [PMID: 29637750 PMCID: PMC5895828 DOI: 10.3947/ic.2018.50.1.29] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 01/05/2018] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND In many developing countries, shigellosis is endemic and also occurs in epidemics and treatment of multidrug-resistant (MDR) isolates are important. The aims of this study were to determine the antimicrobial susceptibility, prevalence of class 1 and 2 integrons and the clonal relatedness of isolates. MATERIALS AND METHODS Antimicrobial susceptibility tests were performed by disc diffusion method. Polymerase chain reaction (PCR)-sequencing technique was employed for detection and characterization of integrons. The genetic relatedness was evaluated by using enterobacterial repetitive intergenic consensus (ERIC) PCR. RESULTS There was a high percentage of resistance to trimethoprim-sulfamethoxazole (TMP/SMX) (93.7%), ampicillin (AMP) (87.3%), streptomycin (STR) (84.5%) and tetracycline (TET) (78.9%). Multidrug resistant phenotype was seen in 95.1% of total isolates. Most common MDR profile was TMP/SMX/STR/AMP resistant pattern. Among the 142 Shigella spp. analyzed in this study, 28 isolates were positive for class 1 integron with two types of gene cassette arrays (dfrA17/aadA5 = 31.7% and dfrA7 = 3.8%). The class 2 integron was more frequently detected among the isolates (94.7%) with dfrA1/sat1/aadA1 (69.4%) and dfrA1/sat1 (30.6%) gene cassettes. ERIC-PCR results showed 6, 5, 4 and 3 main genotypes among S. flexneri, S. sonnei, S. boydii and S. dysenteriae isolates, respectively. CONCLUSIONS Our findings revealed that multidrug resistant Shigella species with high prevalence of class 2 integron were very common in Iran. In addition, ERIC-PCR patterns showed limited variety of clones are responsible for shigellosis in the region of the study.
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Affiliation(s)
- Sajjad Zamanlou
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Microbiology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran.,Iranian Social Security Organization, Emam Reza Hospital, Urmia, Iran
| | - Mohammad Ahangarzadeh Rezaee
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Microbiology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Mohammad Aghazadeh
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Reza Ghotaslou
- Department of Microbiology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hossein Hosseini Nave
- Department of Microbiology and Virology, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Younes Khalili
- Department of Microbiology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Iranian Social Security Organization, Emam Reza Hospital, Urmia, Iran
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Pires J, Kuenzli E, Kasraian S, Tinguely R, Furrer H, Hilty M, Hatz C, Endimiani A. Polyclonal Intestinal Colonization with Extended-Spectrum Cephalosporin-Resistant Enterobacteriaceae upon Traveling to India. Front Microbiol 2016; 7:1069. [PMID: 27462305 PMCID: PMC4940376 DOI: 10.3389/fmicb.2016.01069] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 06/27/2016] [Indexed: 12/18/2022] Open
Abstract
We aimed to assess the intestinal colonization dynamics by multiple extended-spectrum cephalosporin-resistant Enterobacteriaceae (ESC-R-Ent) clones in Swiss travelers to India, a country with high prevalence of these multidrug-resistant pathogens. Fifteen healthy volunteers (HVs) colonized with ESC-R-Ent after traveling to India who provided stools before, after, and at 3- and 6-month follow-up are presented in this study. Stools were enriched in a LB broth containing 3 mg/L cefuroxime and plated in standard selective media (BLSE, ChromID ESBL, Supercarba) to detect carbapenem- and/or ESC-R-Ent. At least 5 Enterobacteriaceae colonies were analyzed for each stool provided. All strains underwent phenotypic tests (MICs in microdilution) and molecular typing to define bla genes (microarray, PCR/sequencing), clonality (MLST, rep-PCR), and plasmid content. While only three HVs were colonized before the trip, all participants had positive stools after returning, but the colonization rate decreased during the follow-up period (i.e., six HVs were still colonized at both 3 and 6 months). More importantly, polyclonal acquisition (median of 2 clones, range 1–5) was identified at return in all HVs. The majority of the Escherichia coli isolates belonged to phylogenetic groups A and B1 and to high diverse non-epidemic sequence types (STs); however, 15% of them belonged to clonal complex 10 and mainly possessed blaCTX−M−15 genes. F family plasmids were constantly found (~80%) in the recovered ESC-R-Ent. Our results indicate a possible polyclonal acquisition of the ESC-R-Ent via food-chain and/or through an environmental exposure. For some HVs, prolonged colonization in the follow-up period was observed due to clonal persistence or presence of the same plasmid replicon types in a new bacterial host. Travel medicine practitioners, clinicians, and clinical microbiologists who are facing the returning travelers and their samples for different reasons should be aware of this important phenomenon, so that better infection control measures, treatment strategies, and diagnostic tests can be adopted.
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Affiliation(s)
- João Pires
- Institute for Infectious Diseases, University of BernBern, Switzerland; Graduate School of Cellular and Biomedical Sciences, University of BernBern, Switzerland
| | - Esther Kuenzli
- Division for Infectious Diseases and Hospital Epidemiology, University Hospital BaselBasel, Switzerland; Swiss Tropical and Public Health InstituteBasel, Switzerland; Epidemiology, Biostatistics and Prevention Institute, University of ZurichZurich, Switzerland
| | - Sara Kasraian
- Institute for Infectious Diseases, University of Bern Bern, Switzerland
| | - Regula Tinguely
- Institute for Infectious Diseases, University of Bern Bern, Switzerland
| | - Hansjakob Furrer
- Department of Infectious Diseases, Bern University Hospital, University of Bern Bern, Switzerland
| | - Markus Hilty
- Institute for Infectious Diseases, University of BernBern, Switzerland; Department of Infectious Diseases, Bern University Hospital, University of BernBern, Switzerland
| | - Christoph Hatz
- Swiss Tropical and Public Health InstituteBasel, Switzerland; Epidemiology, Biostatistics and Prevention Institute, University of ZurichZurich, Switzerland
| | - Andrea Endimiani
- Institute for Infectious Diseases, University of Bern Bern, Switzerland
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Mekonnen A, Yitayew B, Tesema A, Taddese S. In Vitro Antimicrobial Activity of Essential Oil of Thymus schimperi, Matricaria chamomilla, Eucalyptus globulus, and Rosmarinus officinalis. Int J Microbiol 2016; 2016:9545693. [PMID: 26880928 PMCID: PMC4736320 DOI: 10.1155/2016/9545693] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 11/23/2015] [Accepted: 12/01/2015] [Indexed: 11/17/2022] Open
Abstract
In this study, the in vitro antimicrobial activities of four plant essential oils (T. schimperi, E. globulus, R. officinalis, and M. Chamomilla) were evaluated against bacteria and fungi. The studies were carried out using agar diffusion method for screening the most effective essential oils and agar dilution to determine minimum inhibitory concentration of the essential oils. Results of this study revealed that essential oils of T. schimperi, E. globulus, and R. officinalis were active against bacteria and some fungi. The antimicrobial effect of M. chamomilla was found to be weaker and did not show any antimicrobial activity. The minimum inhibitory concentration values of T. schimperi were <15.75 mg/mL for most of the bacteria and fungi used in this study. The minimum inhibitory concentration values of the other essential oils were in the range of 15.75-36.33 mg/mL against tested bacteria. This study highlighted the antimicrobial activity of the essential oil of E. globulus, M. chamomilla, T. Schimperi, and R. officinalis. The results indicated that T. schimperi have shown strong antimicrobial activity which could be potential candidates for preparation of antimicrobial drug preparation.
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Affiliation(s)
- Awol Mekonnen
- College of Medicine, Institute of Medicine and Health Science, Debre Birhan University, P.O. Box 445, Debre Berhan, Ethiopia
| | - Berhanu Yitayew
- College of Medicine, Institute of Medicine and Health Science, Debre Birhan University, P.O. Box 445, Debre Berhan, Ethiopia
| | - Alemnesh Tesema
- College of Medicine, Institute of Medicine and Health Science, Debre Birhan University, P.O. Box 445, Debre Berhan, Ethiopia
| | - Solomon Taddese
- College of Natural Science, Department of Biology, Debre Birhan University, P.O. Box 445, Debre Berhan, Ethiopia
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MULTIDRUG RESISTANCE IN WILD BIRD POPULATIONS: IMPORTANCE OF THE FOOD CHAIN. J Zoo Wildl Med 2015; 46:723-31. [DOI: 10.1638/2012-0212.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Srivastava J, Chandra H, Nautiyal AR, Kalra SJS. Antimicrobial resistance (AMR) and plant-derived antimicrobials (PDA ms) as an alternative drug line to control infections. 3 Biotech 2014; 4:451-460. [PMID: 28324380 PMCID: PMC4162903 DOI: 10.1007/s13205-013-0180-y] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 10/07/2013] [Indexed: 12/26/2022] Open
Abstract
Infectious diseases caused by antimicrobial-resistant microbes (ARMs) and the treatment are the serious problems in the field of medical science today world over. The development of alternative drug line to treat such infectious diseases is urgently required. Researches on ARMs revealed the presence of membrane proteins responsible for effusing the antibiotics from the bacterial cells. Such proteins have successfully been treated by plant-derived antimicrobials (PDAms) synergistically along with the commercially available antibiotics. Such synergistic action usually inhibits the efflux pump. The enhanced activity of plant-derived antimicrobials is being researched and is considered as the future treatment strategy to cure the incurable infections. The present paper reviews the advancement made in the researches on antimicrobial resistance along with the discovery and the development of more active PDAms.
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Affiliation(s)
- Jatin Srivastava
- Department of Applied Sciences, Faculty of Environmental Science, Himalayan Institute of Technology and Management, BKT, NH 24, Lucknow, 227005, UP, India.
| | - Harish Chandra
- Department of Medicinal and Aromatic Plants, School of Agriculture and Allied Sciences, High Altitude Plant Physiology Research Center, H.N.B. Garhwal University, Srinagar, Uttrakhand, India
| | - Anant R Nautiyal
- Department of Medicinal and Aromatic Plants, School of Agriculture and Allied Sciences, High Altitude Plant Physiology Research Center, H.N.B. Garhwal University, Srinagar, Uttrakhand, India
| | - Swinder J S Kalra
- Department of Chemistry, Dayanand Anglo Vedic College, Civil Lines, Kanpur, UP, India
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Kaushik D, Mohan M, Borade DM, Swami OC. Ampicillin: rise fall and resurgence. J Clin Diagn Res 2014; 8:ME01-3. [PMID: 24995206 DOI: 10.7860/jcdr/2014/8777.4356] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 06/20/2014] [Indexed: 11/24/2022]
Abstract
Antimicrobial resistance (AMR) is a global problem. AMR has posed new challenges in treatment of infectious diseases. Antimicrobials are losing efficacy due to development of resistant pathogens. It has lead to re-emergence of certain infectious diseases. Treatment of such diseases has undergone changes with use of alternative antimicrobials and drug combinations. Pathogens are likely to develop resistance to alternative antimicrobials also and risk of infections with nonexistent treatment is real. Salmonella showed widespread resistant to ampicillin which resulted in use of alternative antimicrobials like fluroquinolones and cephalosporins in the treatment of enteric fever in last two decades. Unfortunately there are growing reports of resistance to these antimicrobials. Interestingly there are numerous reports of ampicillin regaining activity against Salmonella. Speculatively lack of exposure of Salmonella to ampicillin for long time resulted in the loss of plasmid mediated resistance in the pathogen. There may have been emergence of de novo ampicillin susceptible strains. This is assuring in the era where problem of AMR is compounded by the scarcity of new antimicrobial development.
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Affiliation(s)
- Dwarikadhish Kaushik
- Consultant Physician, Department of Critical Care Medicine, St Joseph Hospital , Mariyam Nagar, Nandgram Ghaziabad-201003, UP, India
| | - Mudit Mohan
- Consultant Physician, Department of Medicine, Yashoda Hospital , Ghaziabad, UP, India
| | - Dhammraj M Borade
- Assistant Manager, Department of Medical Service, Unichem Laboratories Ltd , Unichem Bhavan, Prabhat Estate, S.V. Road, Jogeshwari (W), Mumbai, Maharashtra, India
| | - Onkar C Swami
- Head, Department of Medical Services, Unichem Laboratories Ltd , Unichem Bhavan, Prabhat Estate, S.V. Road, Jogeshwari (W), Mumbai, Maharashtra, India
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β-Lactamase production in key gram-negative pathogen isolates from the Arabian Peninsula. Clin Microbiol Rev 2014; 26:361-80. [PMID: 23824364 DOI: 10.1128/cmr.00096-12] [Citation(s) in RCA: 138] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
SUMMARY Infections due to Gram-negative bacilli (GNB) are a leading cause of morbidity and mortality worldwide. The extent of antibiotic resistance in GNB in countries of the Gulf Cooperation Council (GCC), namely, Saudi Arabia, United Arab Emirates, Kuwait, Qatar, Oman, and Bahrain, has not been previously reviewed. These countries share a high prevalence of extended-spectrum-β-lactamase (ESBL)- and carbapenemase-producing GNB, most of which are associated with nosocomial infections. Well-known and widespread β-lactamases genes (such as those for CTX-M-15, OXA-48, and NDM-1) have found their way into isolates from the GCC states. However, less common and unique enzymes have also been identified. These include PER-7, GES-11, and PME-1. Several potential risk factors unique to the GCC states may have contributed to the emergence and spread of β-lactamases, including the unnecessary use of antibiotics and the large population of migrant workers, particularly from the Indian subcontinent. It is clear that active surveillance of antimicrobial resistance in the GCC states is urgently needed to address regional interventions that can contain the antimicrobial resistance issue.
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Transfer of multidrug-resistant bacteria between intermingled ecological niches: the interface between humans, animals and the environment. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2013; 10:278-94. [PMID: 23343983 PMCID: PMC3564142 DOI: 10.3390/ijerph10010278] [Citation(s) in RCA: 181] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 12/31/2012] [Accepted: 01/09/2013] [Indexed: 12/14/2022]
Abstract
The use of antimicrobial agents has been claimed to be the driving force for the emergence and spread of microbial resistance. However, several studies have reported the presence of multidrug-resistant bacteria in populations exposed to low levels of antimicrobial drugs or even never exposed. For many pathogens, especially those organisms for which asymptomatic colonization typically precedes infection (e.g., Enterococcus spp. and Escherichia coli), the selective effects of antimicrobial use can only be understood if we considerer all biological and environmental pathways which enable these bacteria, and the genes they carry, to spread between different biomes. This ecological framework provides an essential perspective for formulating antimicrobial use policies, precisely because it encompasses the root causes of these problems rather than merely their consequences.
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20
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van der Bij AK, Pitout JDD. The role of international travel in the worldwide spread of multiresistant Enterobacteriaceae. J Antimicrob Chemother 2012; 67:2090-100. [DOI: 10.1093/jac/dks214] [Citation(s) in RCA: 196] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Peirano G, Laupland KB, Gregson DB, Pitout JDD. Colonization of returning travelers with CTX-M-producing Escherichia coli. J Travel Med 2011; 18:299-303. [PMID: 21896092 DOI: 10.1111/j.1708-8305.2011.00548.x] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND We previously identified foreign travel as a risk factor for acquiring infections due to CTX-M (active on cefotaxime first isolated in Munich) producing Escherichia coli. The objective of this study was to assess the prevalence of extended-spectrum β-lactamase (ESBL)-producing E coli among stool samples submitted from travelers as compared to non-travelers (a non-traveler had not been outside of Canada for at least 6 months before submitting a stool specimen). METHODS Once a travel case was identified, the next stool from a non-traveler (not been outside of Canada for at least 6 months) was included and cultured on the chromID-ESBL selection media. Molecular characterization was done using polymerase chain reaction and sequencing for bla(CTX-Ms), bla(TEMs), bla(SHVs), plasmid-mediated quinolone-resistant determinants, O25-ST131, phylogenetic groups, pulsed-field gel electrophoresis (PFGE), and multilocus sequencing typing. RESULTS A total of 226 individuals were included; 195 (86%) were negative, and 31 (14%) were positive for ESBL-producing E coli. Notably, travelers were 5.2 (95% CI 2.1-31.1) times more likely than non-travelers to have an ESBL-producing E coli cultured from their stool. The highest rates of ESBL positivity were associated with travel to Africa or the Indian subcontinent. Among the 31 ESBL-producing E coli isolated, 22 produced CTX-M-15, 8 produced CTX-M-14, 1 produced CTX-M-8, 12 were positive for aac(6')-Ib-cr, and 8 belonged to clone ST131. CONCLUSIONS Our study confirms that foreign travel, especially to the Indian subcontinent and Africa, represents a major risk for rectal colonization with CTX-M-producing E coli and contributed to the Worldwide spread of these bacteria.
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Affiliation(s)
- Gisele Peirano
- Division of Microbiology, Calgary Laboratory Services, University of Calgary, Calgary, Alberta, Canada
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22
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Ranjbar R, Aleo A, Giammanco GM, Dionisi AM, Sadeghifard N, Mammina C. Genetic relatedness among isolates of Shigella sonnei carrying class 2 integrons in Tehran, Iran, 2002-2003. BMC Infect Dis 2007; 7:62. [PMID: 17587439 PMCID: PMC1914347 DOI: 10.1186/1471-2334-7-62] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2007] [Accepted: 06/22/2007] [Indexed: 11/26/2022] Open
Abstract
Background Shigella spp. are major cause of diarrhoeal disease in both developing and developed countries. Shigella sonnei is the serogroup of Shigella most frequently responsible for sporadic and epidemic enteritis in developed countries. In recent years the emergence and spread of S. sonnei biotype g carrying class 2 integron have been frequently reported in many countries. Recently, S. sonnei has been reported as the prevalent serogroup of Shigella in Iran. The present study was carried out to investigate phenotypic and genetic characteristics of Shigella sonnei isolates identified in the years 2002 and 2003 in Tehran, Iran. Methods Biotyping, drug susceptibility testing, pulsed field gel electrophoresis (PFGE) and analysis of class 2 integrons have been carried out on 60 S. sonnei isolates, including 57 sporadic isolates from paediatric cases of shigellosis occurring in 2002 and 2003, two sporadic isolates recovered in 1984 and the ATCC 9290 strain. Results Biotype g and resistance to streptomycin, sulfamethoxazole-trimethoprim and tetracycline were exhibited by 54 of the 57 recent isolates. Of the 54 biotype g isolates, 28 exhibited a class 2 integron of 2161 bp, and 24 a class 2 integron of 1371 bp, respectively. Class 2 integrons were not detected in four isolates only, including the two endemic isolates recovered in 1984 and two strains from recent sporadic cases. PFGE divided the strains into eight pulsotypes labeled A to H, three major pulsotypes – A to C – including the large majority of the recent sporadic S. sonnei isolates. Pulsotypes A and C were the most prevalent groups, accounting for 41.6% and 35.0%, respectively, of the isolates under study. Conclusion The results suggest that biotype g, class 2 integron carrying S. sonnei are prevalent in our geographic area. S. sonnei isolated in the years 2002 and 2003 could be attributed to a few predominant clusters including, respectively, strains with pulsotypes B and C carrying a 2161 bp class 2 integron, and those having pulsotype A and a 1371 bp class 2 integron. A few epidemic clones are responsible for the apparently endemic occurrence of shigellosis in Tehran, Iran.
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Affiliation(s)
- Reza Ranjbar
- Research Center of Molecular Biology, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Aurora Aleo
- Dipartimento di Igiene e Microbiologia "G. D'Alessandro", Università di Palermo, Via del Vespro 133, I-90127 Palermo, Italy
| | - Giovanni M Giammanco
- Dipartimento di Igiene e Microbiologia "G. D'Alessandro", Università di Palermo, Via del Vespro 133, I-90127 Palermo, Italy
| | - Anna Maria Dionisi
- Dipartimento di Malattie Infettive, Parassitarie e Immunomediate, Istituto Superiore di Sanità, Viale Regina Elena 299, I-00161Rome, Italy
| | - Nourkhoda Sadeghifard
- Department of Microbiology, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran
| | - Caterina Mammina
- Dipartimento di Igiene e Microbiologia "G. D'Alessandro", Università di Palermo, Via del Vespro 133, I-90127 Palermo, Italy
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da Costa PM, Oliveira M, Bica A, Vaz-Pires P, Bernardo F. Antimicrobial resistance in Enterococcus spp. and Escherichia coli isolated from poultry feed and feed ingredients. Vet Microbiol 2007; 120:122-31. [PMID: 17098382 DOI: 10.1016/j.vetmic.2006.10.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2006] [Revised: 09/07/2006] [Accepted: 10/04/2006] [Indexed: 10/24/2022]
Abstract
Poultry feed is at the start of the food safety chain in the "farm-to-fork" model, and might serve as a source of antimicrobial resistant bacteria present in poultry meat. Antimicrobial resistance was investigated in 1137 enterococci and 163 Escherichia coli strains recovered from 23 samples of commercial broiler feed and 66 samples of raw feeding materials taken over half a year timespan. Enumeration of enterococci and E. coli were also performed using traditional plating and fluorescent in situ hybridisation methods. Viable enterococci were detected in all feed samples and in 66% of samples of separate feed ingredients, while E. coli was present in 50% and 32% of feed and raw feeding materials, respectively. The median values (50th percentile) for plate and FISH counts for feeds were, respectively, 2.70 log CFU/g and 5.52 log cells/g for enterococci, and 0.15 log CFU/g and 6.00 log cells/g for E. coli. Among enterococci recovered from feed ingredients, resistance to rifampicin, erythromycin, nitrofurantoin, tetracycline, and ciprofloxacin was found in 59.8%, 21.6%, 21.2%, 18.0% and 6.9% of the isolates, respectively. A considerable proportion of the enterococci isolates obtained from broiler feed displayed resistance to tetracycline (69.1%), rifampicin (58.5%), erythromycin (52.9%) and nitrofurantoin (36.2%). Lower percentage of resistance was observed to chloramphenicol (4.6%), ciprofloxacin (3.9%), vancomycin (1.9%) and ampicillin (1.2%). Among E. coli recovered from feed ingredients and poultry feeds, resistance to ampicillin, tetracycline and streptomycin was found in 22.9%, 27.6% and 19.0% and in 22.4%, 41.4% and 17.0% of the isolates, respectively. These data show that feedstuffs and poultry feeds are extensively contaminated by resistant enterococci and, in a lesser extent, by E. coli, thus leading to their introduction in the farm environment.
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Affiliation(s)
- Paulo Martins da Costa
- Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto, Largo Professor Abel Salazar 2, 4099-003 Porto, Portugal.
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Abstract
The increasing identification of antibiotic-resistant pathogens that cause serious infections cannot be ignored. Although the future cannot be predicted with certainty, it is surely possible that an extensive epidemic of resistant bacterial infections could potentially harm millions of people. Given that it takes more than 10 years to establish the efficacy and safety of new compounds, there is an urgent need to restock the antibiotic pipeline. Only a few new antibacterial agents have received approval by the US Food and Drug Administration in the last 5 years, including linezolid in 2001, cefditoren, pivoxil and ertapenem in 2002, gemifloxacin and daptomycin in 2003, and telithromycin in 2004. Many of these agents are improved derivatives from established classes of antibiotics, and several are directed primarily at resistant Gram-positive bacteria (e.g., linezolid and daptomycin). One promising new addition is the recent approval of tigecycline (Tigacyl, Wyeth) in June 2005.
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Affiliation(s)
- Stephen H Zinner
- Mount Auburn Hospital, Department of Medicine, Harvard Medical School, Cambridge, MA 02138, USA.
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Ziebuhr W, Xiao K, Coulibaly B, Schwarz R, Dandekar T. Pharmacogenomic strategies against resistance development in microbial infections. Pharmacogenomics 2004; 5:361-79. [PMID: 15165173 DOI: 10.1517/14622416.5.4.361] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
There are several promising new strategies against resistance development in microbial infections. This paper discusses typical experimental and bioinformatical strategies to study the impact of infectious challenges on host–pathogen interaction, followed by several novel approaches and sources for new pharmaceutical strategies against resistance development. Genomics reveals promising new targets by providing a better understanding of cellular pathways, through the identification of new pathways, and by identifying new intervention areas, such as phospholipids, glycolipids, innate immunity, and antibiotic peptides. Additional antibiotic resources come from new genomes, including marine organisms, lytic phages and probiotic strategies. A system perspective regards all interactions between the host, pathogen and environment to develop new pharmacogenomic strategies against resistance development.
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Affiliation(s)
- Wilma Ziebuhr
- Institut für Molekulare Infektionsbiologie, Würzburg, Germany
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