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de Souza Rodrigues D, Lannes‐Costa PS, da Silva Santos G, Ribeiro RL, Langoni H, Teixeira LM, Nagao PE. Antimicrobial resistance, biofilm production and invasion of mammary epithelial cells by
Enterococcus faecalis
and
Enterococcus mundtii
strains isolated from bovine subclinical mastitis in Brazil. Lett Appl Microbiol 2022; 75:184-194. [DOI: 10.1111/lam.13718] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 01/24/2022] [Accepted: 04/05/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Dayane de Souza Rodrigues
- Laboratório de Biologia Molecular e Fisiologia de Estreptococos Instituto de Biologia Roberto Alcantara Gomes Universidade do Estado do Rio de Janeiro (UERJ) Rio de Janeiro RJ Brazil
| | - Pamella Silva Lannes‐Costa
- Laboratório de Biologia Molecular e Fisiologia de Estreptococos Instituto de Biologia Roberto Alcantara Gomes Universidade do Estado do Rio de Janeiro (UERJ) Rio de Janeiro RJ Brazil
| | - Gabriela da Silva Santos
- Laboratório de Biologia Molecular e Fisiologia de Estreptococos Instituto de Biologia Roberto Alcantara Gomes Universidade do Estado do Rio de Janeiro (UERJ) Rio de Janeiro RJ Brazil
| | - Rachel Leite Ribeiro
- Instituto de Microbiologia Paulo de Góes Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil
| | - Helio Langoni
- Departamento de Higiene Veterinária e Saúde Pública Faculdade de Medicina Veterinária e Zootecnia Universidade do Estado de São Paulo Botucatu, São Paulo Brazil
| | - Lúcia Martins Teixeira
- Instituto de Microbiologia Paulo de Góes Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil
| | - Prescilla Emy Nagao
- Laboratório de Biologia Molecular e Fisiologia de Estreptococos Instituto de Biologia Roberto Alcantara Gomes Universidade do Estado do Rio de Janeiro (UERJ) Rio de Janeiro RJ Brazil
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Stapleton GS, Cazer CL, Gröhn YT. Modeling the Effect of Tylosin Phosphate on Macrolide-Resistant Enterococci in Feedlots and Reducing Resistance Transmission. Foodborne Pathog Dis 2020; 18:85-96. [PMID: 33006484 DOI: 10.1089/fpd.2020.2835] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Tylosin phosphate (TYL) is administered to more than 50% of U.S. beef cattle to reduce the incidence of liver abscesses but may increase the risk of macrolide-lincosamide-streptogramin-resistant bacteria disseminating from the feedlot. Limited evidence has been collected to understand how TYL affects the proportion of resistant bacteria in cattle or the feedlot environment. We created a mathematical model to investigate the effects of TYL administration on Enterococcus dynamics and examined preharvest strategies to mitigate the impact of TYL administration on resistance. The model simulated the physiological pharmacokinetics of orally administered TYL and estimated the pharmacodynamic effects of TYL on populations of resistant and susceptible Enterococcus within the cattle large intestine, feedlot pen, water trough, and feed bunk. The model parameters' population distributions were based on the available literature; 1000 Monte Carlo simulations were performed to estimate the likely distribution of outcomes. At the end of the simulated treatment period, the median estimated proportion of macrolide-resistant enterococci was only 1 percentage point higher within treated cattle compared with cattle not fed TYL, in part because the TYL concentrations in the large intestine were substantially lower than the enterococci minimum inhibitory concentrations. However, 25% of the simulated cattle had a >10 percentage point increase in the proportion of resistant enterococci associated with TYL administration, termed the TYL effect. The model predicts withdrawing TYL treatment and moving cattle to an antimicrobial-free terminal pen with a low prevalence of resistant environmental enterococci for as few as 6 days could reduce the TYL effect by up to 14 percentage points. Additional investigation of the importance of this subset of cattle to the overall risk of resistance transmission from feedlots will aid in the interpretation and implementation of resistance mitigation strategies.
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Affiliation(s)
| | - Casey L Cazer
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
| | - Yrjö T Gröhn
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
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Cavicchioli VQ, Todorov SD, Iliev I, Ivanova I, Drider D, Nero LA. Physiological and molecular insights of bacteriocin production by Enterococcus hirae ST57ACC from Brazilian artisanal cheese. Braz J Microbiol 2019; 50:369-377. [PMID: 30852798 DOI: 10.1007/s42770-019-00068-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 12/07/2018] [Indexed: 11/25/2022] Open
Abstract
The bacteriocinogenic Enterococcus hirae ST57ACC recently isolated from a Brazilian artisanal cheese was subjected here to additional analyses in order to evaluate its bacteriocin production and the potential influence of ABC transporter system in its expression. Besides these physiological and molecular aspects, the bacteriocin was evaluated for its cytotoxicity against HT-29. Differences in the inoculum size had no impact on the growth of E. hirae ST57ACC; however, the bacteriocin was only produced after 9 h of growth when the strain was inoculated at 5% or 10% (v/v), with similar levels of bacteriocin production obtained by both conventional growth and batch fermentation. Furthermore, potential expression of ABC transporters corresponding to the bacteriocin transport and sugar metabolism was identified. In terms of adverse effects, when a semi-purified fraction of the bacteriocin and the cell-free supernatant were tested against HT-29, total cell viability was similar to observed on untreated cells, indicating the absence of cytotoxic effect. Based on the obtained results, E. hirae ST57ACC can produce its bacteriocin at industrial level by using bioreactors, its bacteriocin expression is potentially influenced by the ABC transporter system, and no cytotoxic effects were observed on HT-29 cells, indicating its potential use as a bio-preservative.
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Affiliation(s)
| | - Svetoslav Dimitrov Todorov
- Departamento de Veterinária, Universidade Federal de Viçosa, Campus UFV, Viçosa, MG, 36570-900, Brazil
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580, São Paulo, SP, 05508-000, Brazil
| | - Ilia Iliev
- Department of Biochemistry and Microbiology, Faculty of Biology, Plovdiv University, 4 Tzar Asen Str, 4000, Plovdiv, Bulgaria
| | - Iskra Ivanova
- Department of General and Applied Microbiology, Faculty of Biology, Sofia University "St. Kliment Ohridski", 8 Dragan Tzankov Blvd., 1164, Sofia, Bulgaria
| | - Djamel Drider
- Université de Lille, INRA, Université d'Artois, Université du Littoral-Côte d'Opale, EA 7394-ICV-Institut Charles Viollette, F-59000, Lille, France
| | - Luís Augusto Nero
- Departamento de Veterinária, Universidade Federal de Viçosa, Campus UFV, Viçosa, MG, 36570-900, Brazil.
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Gatto V, Tabanelli G, Montanari C, Prodomi V, Bargossi E, Torriani S, Gardini F. Tyrosine decarboxylase activity of Enterococcus mundtii: new insights into phenotypic and genetic aspects. Microb Biotechnol 2016; 9:801-813. [PMID: 27624853 PMCID: PMC5072196 DOI: 10.1111/1751-7915.12402] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 06/15/2016] [Indexed: 01/24/2023] Open
Abstract
Few information is available about the tyraminogenic potential of the species Enterococcus mundtii. In this study, two plant‐derived strains of E. mundtii were selected and investigated to better understand the phenotypic behaviour and the genetic mechanisms involved in tyramine accumulation. Both the strains accumulated tyramine from the beginning of exponential phase of growth, independently on the addition of tyrosine to the medium. The strains accumulated also 2‐phenylethylamine, although with lower efficiency and in greater extent when tyrosine was not added. Accordingly, the tyrosine decarboxylase (tyrDC) gene expression level increased during the exponential phase with tyrosine added, while it remained constant and high without precursor. The genetic organization as well as sequence identity levels of tyrDC and tyrosine permease (tyrP) genes indicated a correlation with those of phylogenetically closer enterococcal species, such as E. faecium, E. hirae and E. durans; however, the gene Na+/H+ antiporter (nhaC) that usually follow tyrP is missing. In addition, BLAST analysis revealed the presence of additional genes encoding for decarboxylase and permease in the genome of several E. mundtii strains. It is speculated the occurrence of a duplication event and the acquisition of different specificity for these enzymes that deserves further investigations.
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Affiliation(s)
- Veronica Gatto
- Department of Biotechnology, University of Verona, Verona, Italy
| | - Giulia Tabanelli
- Department of Agricultural and Food Sciences, University of Bologna, Cesena, Italy
| | - Chiara Montanari
- Interdepartmental Center for Industrial Agri-food Research, University of Bologna, Cesena, Italy
| | | | - Eleonora Bargossi
- Department of Agricultural and Food Sciences, University of Bologna, Cesena, Italy
| | - Sandra Torriani
- Department of Biotechnology, University of Verona, Verona, Italy.
| | - Fausto Gardini
- Department of Agricultural and Food Sciences, University of Bologna, Cesena, Italy.,Interdepartmental Center for Industrial Agri-food Research, University of Bologna, Cesena, Italy
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