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Saliu EM, Eitinger M, Zentek J, Vahjen W. Nutrition Related Stress Factors Reduce the Transfer of Extended-Spectrum Beta-Lactamase Resistance Genes between an Escherichia coli Donor and a Salmonella Typhimurium Recipient In Vitro. Biomolecules 2019; 9:E324. [PMID: 31370208 PMCID: PMC6724058 DOI: 10.3390/biom9080324] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 07/25/2019] [Accepted: 07/26/2019] [Indexed: 12/26/2022] Open
Abstract
The transfer of extended spectrum β-lactamase (ESBL)-genes occurs frequently between different bacteria species. The aim of this study was to investigate the impact of nutrition related stress factors on this transfer. Thus, an Escherichia coli donor and a Salmonella Typhimurium recipient were co-incubated for 4 h in media containing different levels of the stress factors' pH, osmolality, copper, zinc and acetic, propionic, lactic, and n-butyric acid, as well as subtherapeutic levels of cefotaxime, sulfamethoxazole/trimethoprim, and nitrofurantoin. Conjugation frequencies were calculated as transconjugants per donor, recipient, and total bacterial count. A correction factor for the stress impact on bacterial growth was used. Acetic, lactic, and n-butyric, acid, as well as pH, showed no significant impact. In contrast, increasing concentrations of propionate, zinc, copper, and nitrofurantoin, as well as increased osmolality reduced conjugation frequencies. Sulfamethoxazole/trimethoprim and cefotaxime showed increased transconjugants per donor, which decreased after correction for stress. This study showed, for the model mating pair, that conjugation frequencies decreased under different physiological stress conditions, and, thus, the hypothesis that stress factors may enhance conjugation should be viewed with caution. Furthermore, for studies on in vitro gene transfer, it is vital to consider the impact of studied stressors on bacterial growth.
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Affiliation(s)
- Eva-Maria Saliu
- Freie Universität Berlin, Institute of Animal Nutrition, Königin-Luise-Str. 49, 14195 Berlin, Germany.
| | - Marita Eitinger
- Freie Universität Berlin, Institute of Animal Nutrition, Königin-Luise-Str. 49, 14195 Berlin, Germany
| | - Jürgen Zentek
- Freie Universität Berlin, Institute of Animal Nutrition, Königin-Luise-Str. 49, 14195 Berlin, Germany
| | - Wilfried Vahjen
- Freie Universität Berlin, Institute of Animal Nutrition, Königin-Luise-Str. 49, 14195 Berlin, Germany
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Durão P, Balbontín R, Gordo I. Evolutionary Mechanisms Shaping the Maintenance of Antibiotic Resistance. Trends Microbiol 2018; 26:677-691. [DOI: 10.1016/j.tim.2018.01.005] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 01/05/2018] [Accepted: 01/24/2018] [Indexed: 01/10/2023]
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Sousa A, Frazão N, Ramiro RS, Gordo I. Evolution of commensal bacteria in the intestinal tract of mice. Curr Opin Microbiol 2017; 38:114-121. [PMID: 28591676 DOI: 10.1016/j.mib.2017.05.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 04/28/2017] [Accepted: 05/21/2017] [Indexed: 12/19/2022]
Abstract
Hundreds of different bacterial species inhabit our intestines and contribute to our health status, with significant loss of species diversity typically observed in disease conditions. Within each microbial species a great deal of diversity is hidden and such intra-specific variation is also key to the proper homeostasis between the host and its microbial inhabitants. Indeed, it is at this level that new mechanisms of antibiotic resistance emerge and pathogenic characteristics evolve. Yet, our knowledge on intra-species variation in the gut is still limited and an understanding of the evolutionary mechanisms acting on it is extremely reduced. Here we review recent work that has begun to reveal that adaptation of commensal bacteria to the mammalian intestine may be fast and highly repeatable, and that the time scales of evolutionary and ecological change can be very similar in these ecosystems.
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Affiliation(s)
- Ana Sousa
- Instituto Gulbenkian de Ciência, Rua da Quinta Grande, 6, Oeiras, Portugal; iBiMED, Institute for Biomedicine, Universidade de Aveiro, Portugal
| | - Nelson Frazão
- Instituto Gulbenkian de Ciência, Rua da Quinta Grande, 6, Oeiras, Portugal
| | - Ricardo S Ramiro
- Instituto Gulbenkian de Ciência, Rua da Quinta Grande, 6, Oeiras, Portugal
| | - Isabel Gordo
- Instituto Gulbenkian de Ciência, Rua da Quinta Grande, 6, Oeiras, Portugal.
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Sabia C, de Niederhäusern S, Guerrieri E, Bondi M, Anacarso I, Iseppi R, Messi P. Interference of Lactobacillus plantarum strains in the in vitro conjugative transfer of R-plasmids. Curr Microbiol 2008; 58:101-5. [PMID: 18810532 DOI: 10.1007/s00284-008-9279-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2008] [Accepted: 07/08/2008] [Indexed: 11/29/2022]
Abstract
Probiotic compounds, which are often constituted of lactobacilli, exert a number of health benefits through maintenance of the intestinal ecosystem balance. Among the important interactions that occur in the gut microbiota, plasmid transfer by mating is an increasing cause of concern, particularly when antibiotic-resistant genes are involved. Because lactobacilli seem to be able to influence this mechanism, the aim of the present work was to investigate the in vitro capability of two Lactobacillus plantarum strains (one bacteriocin producer and one nonproducer) to interfere with the conjugation processes. For this purpose different matings were performed adding to the donor and recipient cells L. plantarum 35d bac+ and L. plantarum 396/1 bac- as agents of interference. Conjugations added with a Staphylococcus aureus strain or without any agent of interference were used as controls. The results of our experiments demonstrated that both lactobacillus strains were able to decrease mating frequency. Statistically significant differences in the viable transconjugants were obtained in the presence and in the absence of the lactobacilli. The effect was almost the same with the two L. plantarum independent of bacteriocin production. In the trial performed with S. aureus, no decrease in mating frequency was observed, confirming that the capability to interfere with R-plasmid transfer ability could be a property of the tested L. plantarum strains.
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Affiliation(s)
- Carla Sabia
- Department of Biomedical Sciences, University of Modena and Reggio Emilia, Modena, Italy
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Kelly BG, Vespermann A, Bolton DJ. Gene transfer events and their occurrence in selected environments. Food Chem Toxicol 2008; 47:978-83. [PMID: 18639605 DOI: 10.1016/j.fct.2008.06.012] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2007] [Revised: 06/19/2008] [Accepted: 06/20/2008] [Indexed: 11/30/2022]
Abstract
Genes encoding virulence determinants are transferred between species in many different environments. In this review we describe gene transfer events to and from different species of bacteria, from bacteria to plants, and from plants to bacteria. Examples of the setting for these transfer events include: the GI tract, the rumen, the oral cavity, and in food matrixes. As a case study, the flux of virulence factors from E.coli O157:H7 is described as an example of gene flow in the environment.
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Affiliation(s)
- B G Kelly
- Ashtown Food Research Centre, Ashtown, Dublin 15, Ireland.
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Moubareck C, Lecso M, Pinloche E, Butel MJ, Doucet-Populaire F. Inhibitory impact of bifidobacteria on the transfer of beta-lactam resistance among Enterobacteriaceae in the gnotobiotic mouse digestive tract. Appl Environ Microbiol 2006; 73:855-60. [PMID: 17122392 PMCID: PMC1800754 DOI: 10.1128/aem.02001-06] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
While looking for new means to limit the dissemination of antibiotic resistance, we evaluated the role of potentially probiotic bifidobacteria on the transfer of resistance genes between enterobacteria. Transfers of bla genes encoding extended-spectrum beta-lactamases (SHV-5 and CTX-M-15) were studied in the absence or presence of bifidobacteria. In vitro, transfer frequencies of these bla genes decreased significantly in the presence of three of five tested strains, i.e., Bifidobacterium longum CUETM-89-215, Bifidobacterium bifidum CIP-56.7T, and Bifidobacterium pseudocatenulatum CIP-104168T. Four transfer experiments were conducted in the digestive tract of gnotobiotic mice, the first three observing the effect of B. longum CUETM-89-215, B. bifidum CIP-56.7T, and B. pseudocatenulatum CIP-104168T on blaSHV-5 transfer and the fourth experiment studying the effect of B. bifidum CIP-56.7T on blaCTX-M-15 transfer. These experiments revealed significant decreases in the transconjugant levels (up to 3 logs) in mice having received B. bifidum CIP-56.7T or B. pseudocatenulatum CIP-104168T compared to control mice. Bifidobacteria appear to have an inhibitory impact on the transfer of antibiotic resistance genes. The inhibitory effect is associated to specific bifidobacterial strains and may be related to the production of thermostable metabolites by these strains.
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Affiliation(s)
- C. Moubareck
- Laboratoire de Microbiologie, EA 4065, UFR des Sciences Pharmaceutiques et Biologiques, Université René Descartes-Paris 5, 75270 Paris Cedex 06, France, Centre Hospitalier de Versailles, Le Chesnay, France
| | - M. Lecso
- Laboratoire de Microbiologie, EA 4065, UFR des Sciences Pharmaceutiques et Biologiques, Université René Descartes-Paris 5, 75270 Paris Cedex 06, France, Centre Hospitalier de Versailles, Le Chesnay, France
| | - E. Pinloche
- Laboratoire de Microbiologie, EA 4065, UFR des Sciences Pharmaceutiques et Biologiques, Université René Descartes-Paris 5, 75270 Paris Cedex 06, France, Centre Hospitalier de Versailles, Le Chesnay, France
| | - M. J. Butel
- Laboratoire de Microbiologie, EA 4065, UFR des Sciences Pharmaceutiques et Biologiques, Université René Descartes-Paris 5, 75270 Paris Cedex 06, France, Centre Hospitalier de Versailles, Le Chesnay, France
| | - F. Doucet-Populaire
- Laboratoire de Microbiologie, EA 4065, UFR des Sciences Pharmaceutiques et Biologiques, Université René Descartes-Paris 5, 75270 Paris Cedex 06, France, Centre Hospitalier de Versailles, Le Chesnay, France
- Corresponding author. Mailing address: Faculté des Sciences Pharmaceutiques et Biologiques, Laboratoire de Microbiologie, 4 Avenue de l'Observatoire, 75270 Paris Cedex 06, France. Phone: (33) 1 53 73 99 13. Fax: (33) 1 53 73 99 23. E-mail:
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Walsh C, Duffy G, O'Mahony R, Fanning S, Blair IS, McDowell DA. Antimicrobial resistance in Irish isolates of verocytotoxigenic Escherichia coli (E. coli)—VTEC. Int J Food Microbiol 2006; 109:173-8. [PMID: 16626832 DOI: 10.1016/j.ijfoodmicro.2006.01.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2005] [Revised: 11/24/2005] [Accepted: 01/03/2006] [Indexed: 11/19/2022]
Abstract
This study compared the antimicrobial resistance profiles of Escherichia coli O157:H7 isolates (n=257) recovered from bovine hides, minced beef and human clinical samples in Ireland, to those profiles of a range of Irish non-O157 E. coli (O111 and O26) isolates (n=31) from a variety of clinical and veterinary sources. Four multi-drug resistant (MDR) E. coli O157:H7 food isolates were identified, with resistance to 10 (1 isolate), 6 (1 isolate) and 4 (2 isolates) antimicrobial agents, respectively. Two of these isolates (resistant to 7 and 4 antimicrobial classes) were characterised further by molecular methods and found to contain class 1 integrons along with a beta-lactamase-encoding tem-1 gene. Transfer of antimicrobial resistance (ampicillin, streptomycin and sulphonamides), the tem-1 gene and markers (int1, qacEDelta1, sul1) characteristic of class 1 integrons were evident in one MDR isolate (resistant to 4 antimicrobial classes) when conjugation and transformation experiments were performed. A clinical isolate and a veterinary isolate of the O111 serotype were MDR and resistant to 4 and 3 antimicrobial classes, respectively. These data suggest that the prevalence of antimicrobial resistance among the three VTEC serotypes examined in this study is low. However, these organisms may become a public health risk should they enter the food chain.
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Affiliation(s)
- C Walsh
- The National Food Centre, Teagasc, Dunsinea, Ashtown, Dublin 15, Ireland
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van den Eede G, Aarts H, Buhk HJ, Corthier G, Flint HJ, Hammes W, Jacobsen B, Midtvedt T, van der Vossen J, von Wright A, Wackernagel W, Wilcks A. The relevance of gene transfer to the safety of food and feed derived from genetically modified (GM) plants. Food Chem Toxicol 2004; 42:1127-56. [PMID: 15123384 DOI: 10.1016/j.fct.2004.02.001] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2003] [Accepted: 02/04/2004] [Indexed: 12/31/2022]
Abstract
In 2000, the thematic network ENTRANSFOOD was launched to assess four different topics that are all related to the testing or assessment of food containing or produced from genetically modified organisms (GMOs). Each of the topics was linked to a European Commission (EC)-funded large shared cost action (see http://www.entransfood.com). Since the exchange of genetic information through horizontal (lateral) gene transfer (HGT) might play a more important role, in quantity and quality, than hitherto imagined, a working group dealing with HGT in the context of food and feed safety was established. This working group was linked to the GMOBILITY project (GMOBILITY, 2003) and the results of the deliberations are laid down in this review paper. HGT is reviewed in relation to the potential risks of consuming food or feed derived from transgenic crops. First, the mechanisms for obtaining transgenic crops are described. Next, HGT mechanisms and its possible evolutionary role are described. The use of marker genes is presented in detail as a special case for genes that may pose a risk. Furthermore, the exposure to GMOs and in particular to genetically modified (GM) deoxyribonucleic acid (DNA) is discussed as part of the total risk assessment. The review finishes off with a number of conclusions related to GM food and feed safety. The aim of this paper is to provide a comprehensive overview to assist risk assessors as well as regulators and the general public in understanding the safety issues related to these mechanisms.
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Affiliation(s)
- G van den Eede
- European Commission Directorate General Joint Research Centre, Institute for Health and Consumer Protection, Biotechnology and GMOs Unit, Via E. Fermi 1-T.P. 331, I-21020 Ispra (VA), Italy.
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Maisonneuve S, Ouriet MF, Duval-Iflah Y. Interrelationships between dairy product intake, microflora metabolism, faecal properties and plasmid dissemination in gnotobiotic mice. Br J Nutr 2002; 87:121-9. [PMID: 11895164 DOI: 10.1079/bjn2001490] [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: 11/11/2022]
Abstract
We previously described the effects of intake of dairy products on plasmid dissemination in the digestive tract of gnotobiotic mice associated with human faecal flora (HFF) and found that yoghurt, heat-treated yoghurt (HTY) and milk reduced population levels of transconjugants compared with findings in mice fed a standard mouse diet. In the case of lactose intake, transconjugants were not detected. The aim of the present study was to assess the possible interrelationships between these observations and other variables (bacterial ecology, pH, moisture, enzyme activities, short-chain fatty acid (SCFA) contents, lactic acid contents). Much of the interest of the present comparison lies in the fact that the animals were homogeneous in terms of age, gender, food and intestinal microflora, owing to the gnotobiotic mouse model maintained in sterile isolators. We observed no variation in SCFA and lactic acid contents or in the population levels of strictly anaerobic strains of Bacteroides and Bifidobacterium, and of the facultative anaerobic recipient Escherichia coli PG1 strain. The main modifications were the reduction of population levels of transconjugants in mice receiving yoghurt, HTY and milk, and concomitantly an increase of beta-galactosidase and a decrease of beta-glucosidase activities, compared with control mice fed a standard diet. Total inhibition of plasmid transfer was observed in HFF mice consuming lactose, and concomitantly the two enzyme activities (beta-glucosidase and beta-galactosidase) were increased, compared with the findings in control mice fed a standard diet. In axenic mice consuming lactose, plasmid transfer occurred, beta-galactosidase was not detected and beta-glucosidase was decreased. It is therefore proposed that these two enzyme activities influence plasmid transfer and persistence of transconjugants in the digestive tract of HFF associated mice. When both activities were increased there was a total inhibition of plasmid transfer (case of lactose intake). When beta-galactosidase increased and beta-glucosidase decreased (case of yoghurt, HTY and milk), plasmid transfer occurred at a lower efficiency than in the control group, resulting in lower population levels of transconjugants.
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Affiliation(s)
- Sylvie Maisonneuve
- Institut National de la Recherche Agronomique, Centre de Recherche de Jouy en Josas, Unité d'Ecologie et de Physiologie du Système Digestif, France
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