1
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George NL, Bennett EC, Orlando BJ. Guarding the walls: the multifaceted roles of Bce modules in cell envelope stress sensing and antimicrobial resistance. J Bacteriol 2024; 206:e0012324. [PMID: 38869304 PMCID: PMC11270860 DOI: 10.1128/jb.00123-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2024] Open
Abstract
Bacteria have developed diverse strategies for defending their cell envelopes from external threats. In Firmicutes, one widespread strategy is to use Bce modules-membrane protein complexes that unite a peptide-detoxifying ABC transporter with a stress response coordinating two-component system. These modules provide specific, front-line defense for a wide variety of antimicrobial peptides and small molecule antibiotics as well as coordinate responses for heat, acid, and oxidative stress. Because of these abilities, Bce modules play important roles in virulence and the development of antibiotic resistance in a variety of pathogens, including Staphylococcus, Streptococcus, and Enterococcus species. Despite their importance, Bce modules are still poorly understood, with scattered functional data in only a small number of species. In this review, we will discuss Bce module structure in light of recent cryo-electron microscopy structures of the B. subtilis BceABRS module and explore the common threads and variations-on-a-theme in Bce module mechanisms across species. We also highlight the many remaining questions about Bce module function. Understanding these multifunctional membrane complexes will enhance our understanding of bacterial stress sensing and may point toward new therapeutic targets for highly resistant pathogens.
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Affiliation(s)
- Natasha L. George
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, USA
- Department of Microbiology, Genetics, and Immunology, Michigan State University, East Lansing, Michigan, USA
| | - Ellen C. Bennett
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, USA
- Department of Microbiology, Genetics, and Immunology, Michigan State University, East Lansing, Michigan, USA
| | - Benjamin J. Orlando
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, USA
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2
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Ngema SS, Madoroba E. A Mini-Review of Anti-Listerial Compounds from Marine Actinobacteria (1990-2023). Antibiotics (Basel) 2024; 13:362. [PMID: 38667038 PMCID: PMC11047329 DOI: 10.3390/antibiotics13040362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 03/17/2024] [Accepted: 04/04/2024] [Indexed: 04/29/2024] Open
Abstract
Among the foodborne illnesses, listeriosis has the third highest case mortality rate (20-30% or higher). Emerging drug-resistant strains of Listeria monocytogenes, a causative bacterium of listeriosis, exacerbate the seriousness of this public health concern. Novel anti-Listerial compounds are therefore needed to combat this challenge. In recent years, marine actinobacteria have come to be regarded as a promising source of novel antimicrobials. Hence, our aim was to provide a narrative of the available literature and discuss trends regarding bioprospecting marine actinobacteria for new anti-Listerial compounds. Four databases were searched for the review: Academic Search Ultimate, Google Scholar, ScienceDirect, and South African Thesis and Dissertations. The search was restricted to peer-reviewed full-text manuscripts that discussed marine actinobacteria as a source of antimicrobials and were written in English from 1990 to December 2023. In total, for the past three decades (1990-December 2023), only 23 compounds from marine actinobacteria have been tested for their anti-Listerial potential. Out of the 23 reported compounds, only 2-allyoxyphenol, adipostatins E-G, 4-bromophenol, and ansamycins (seco-geldanamycin B, 4.5-dihydro-17-O-demethylgeldanamycin, and seco-geldanamycin) have been found to possess anti-Listerial activity. Thus, our literature survey reveals the scarcity of published assays testing the anti-Listerial capacity of bioactive compounds sourced from marine actinobacteria during this period.
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Affiliation(s)
| | - Evelyn Madoroba
- Department of Biochemistry and Microbiology, University of Zululand, KwaDlangezwa 3886, South Africa;
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3
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Alejandro-Navarreto X, Freitag NE. Revisiting old friends: updates on the role of two-component signaling systems in Listeria monocytogenes survival and pathogenesis. Infect Immun 2024; 92:e0034523. [PMID: 38591895 PMCID: PMC11003226 DOI: 10.1128/iai.00345-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2024] Open
Abstract
Listeria monocytogenes is well recognized for both its broad resistance to stress conditions and its ability to transition from a soil bacterium to an intracellular pathogen of mammalian hosts. The bacterium's impressive ability to adapt to changing environments and conditions requires the rapid sensing of environmental cues and the coordinated response of gene products that enable bacterial growth and survival. Two-component signaling systems (TCSs) have been long recognized for their ability to detect environmental stimuli and transmit those signals into transcriptional responses; however, often the precise nature of the stimulus triggering TCS responses can be challenging to define. L. monocytogenes has up to 16 TCSs that have been recognized based on homology and included in this list are several whose functions remain poorly described. This review highlights the current understanding of the breadth and scope of L. monocytogenes TCS as relates to stress resistance and pathogenesis. Precise signals still often remain elusive, but the gene networks associated with TCSs are providing clues into possible functions.
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Affiliation(s)
| | - Nancy E. Freitag
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, Illinois, USA
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, Illinois, USA
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4
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Moura A, Leclercq A, Vales G, Tessaud-Rita N, Bracq-Dieye H, Thouvenot P, Madec Y, Charlier C, Lecuit M. Phenotypic and genotypic antimicrobial resistance of Listeria monocytogenes: an observational study in France. THE LANCET REGIONAL HEALTH. EUROPE 2024; 37:100800. [PMID: 38362545 PMCID: PMC10866989 DOI: 10.1016/j.lanepe.2023.100800] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/13/2023] [Accepted: 11/15/2023] [Indexed: 02/17/2024]
Abstract
Background Large-scale studies are needed to clarify antimicrobial resistance in the foodborne pathogen Listeria monocytogenes (Lm) and the effectiveness of listeriosis treatment options. Here we examined the antimicrobial resistance patterns in Lm over time and assessed genotype-phenotype concordances. Methods We analyzed 5339 Lm isolates (2908 clinical and 2431 food isolates) collected in France and overseas territories, between 2012 and 2019. Whole genome sequencing was performed for all isolates and antimicrobial resistance profiles inferred from draft assemblies. Antimicrobial susceptibility towards 22 antimicrobials was determined for all clinical isolates, and in food isolates with acquired resistance genes. Findings All tested isolates were resistant to at least 3 different classes of antimicrobials, consistent with Lm intrinsic traits. Acquired antimicrobial resistance in Lm was rare (2.23% isolates) and more prevalent in food (mainly lineage II) compared to clinical isolates (mainly lineage I) (3.74% vs 0.98%, p < 0.0001), and in isolates with disinfectants or stress resistance traits (e.g. bcrABC, 20.20% vs 7.20%, p < 0.0001), suggesting co-selection of resistance in food-production environments. Acquired antimicrobial resistance could be predicted from genomes with high accuracy (>99%), except for ciprofloxacin. Acquired antimicrobial phenotypes were towards tetracyclines (mostly due to tetM), trimethoprim (dfrD), lincosamides (lnuG), macrolides (ermB, mphB) and phenicols (fexA). Interpretation The reference treatment for listeriosis (aminopenicillins/aminoglycosides) remains effective, with no acquired resistance observed. Continuous surveillance of antimicrobial resistance in clinical and food isolates is crucial to detect the emergence of novel resistance. Funding Institut Pasteur, INSERM, Santé Publique France, Investissement d'Avenir program Laboratoire d'Excellence 'Integrative Biology of Emerging Infectious Diseases' (ANR-10-LABX-62-IBEID).
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Affiliation(s)
- Alexandra Moura
- Institut Pasteur, National Reference Centre and WHO Collaborating Centre Listeria, 75015, Paris, France
- Institut Pasteur, Université Paris Cité, Inserm U1117, Biology of Infection Unit, 75015, Paris, France
| | - Alexandre Leclercq
- Institut Pasteur, National Reference Centre and WHO Collaborating Centre Listeria, 75015, Paris, France
- Institut Pasteur, Université Paris Cité, Inserm U1117, Biology of Infection Unit, 75015, Paris, France
| | - Guillaume Vales
- Institut Pasteur, National Reference Centre and WHO Collaborating Centre Listeria, 75015, Paris, France
- Institut Pasteur, Université Paris Cité, Inserm U1117, Biology of Infection Unit, 75015, Paris, France
| | - Nathalie Tessaud-Rita
- Institut Pasteur, National Reference Centre and WHO Collaborating Centre Listeria, 75015, Paris, France
- Institut Pasteur, Université Paris Cité, Inserm U1117, Biology of Infection Unit, 75015, Paris, France
| | - Hélène Bracq-Dieye
- Institut Pasteur, National Reference Centre and WHO Collaborating Centre Listeria, 75015, Paris, France
- Institut Pasteur, Université Paris Cité, Inserm U1117, Biology of Infection Unit, 75015, Paris, France
| | - Pierre Thouvenot
- Institut Pasteur, National Reference Centre and WHO Collaborating Centre Listeria, 75015, Paris, France
- Institut Pasteur, Université Paris Cité, Inserm U1117, Biology of Infection Unit, 75015, Paris, France
| | - Yoann Madec
- Institut Pasteur, Université Paris Cité, Emerging Diseases Epidemiology Unit, 75015, Paris, France
| | - Caroline Charlier
- Institut Pasteur, National Reference Centre and WHO Collaborating Centre Listeria, 75015, Paris, France
- Institut Pasteur, Université Paris Cité, Inserm U1117, Biology of Infection Unit, 75015, Paris, France
| | - Marc Lecuit
- Institut Pasteur, National Reference Centre and WHO Collaborating Centre Listeria, 75015, Paris, France
- Institut Pasteur, Université Paris Cité, Inserm U1117, Biology of Infection Unit, 75015, Paris, France
- Necker-Enfants Malades University Hospital, Division of Infectious Diseases and Tropical Medicine, APHP, Institut Imagine, 75006, Paris, France
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5
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Ładziak M, Prochwicz E, Gut K, Gomza P, Jaworska K, Ścibek K, Młyńska-Witek M, Kadej-Zajączkowska K, Lillebaek EMS, Kallipolitis BH, Krawczyk-Balska A. Inactivation of lmo0946 ( sif) induces the SOS response and MGEs mobilization and silences the general stress response and virulence program in Listeria monocytogenes. Front Microbiol 2024; 14:1324062. [PMID: 38239729 PMCID: PMC10794523 DOI: 10.3389/fmicb.2023.1324062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 12/05/2023] [Indexed: 01/22/2024] Open
Abstract
Bacteria have evolved numerous regulatory pathways to survive in changing environments. The SOS response is an inducible DNA damage repair system that plays an indispensable role in bacterial adaptation and pathogenesis. Here we report a discovery of the previously uncharacterized protein Lmo0946 as an SOS response interfering factor (Sif) in the human pathogen Listeria monocytogenes. Functional genetic studies demonstrated that sif is indispensable for normal growth of L. monocytogenes in stress-free as well as multi-stress conditions, and sif contributes to susceptibility to β-lactam antibiotics, biofilm formation and virulence. Absence of Sif promoted the SOS response and elevated expression of mobilome genes accompanied by mobilization of the A118 prophage and ICELm-1 mobile genetic elements (MGEs). These changes were found to be associated with decreased expression of general stress response genes from the σB regulon as well as virulence genes, including the PrfA regulon. Together, this study uncovers an unexpected role of a previously uncharacterized factor, Sif, as an inhibitor of the SOS response in L. monocytogenes.
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Affiliation(s)
- Magdalena Ładziak
- Department of Molecular Microbiology, Biological and Chemical Research Centre, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Emilia Prochwicz
- Department of Molecular Microbiology, Biological and Chemical Research Centre, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Karina Gut
- Department of Molecular Microbiology, Biological and Chemical Research Centre, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Patrycja Gomza
- Department of Molecular Microbiology, Biological and Chemical Research Centre, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Karolina Jaworska
- Department of Molecular Microbiology, Biological and Chemical Research Centre, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Katarzyna Ścibek
- Department of Molecular Microbiology, Biological and Chemical Research Centre, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Marta Młyńska-Witek
- Department of Molecular Microbiology, Biological and Chemical Research Centre, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Katarzyna Kadej-Zajączkowska
- Department of Molecular Microbiology, Biological and Chemical Research Centre, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Eva M. S. Lillebaek
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Birgitte H. Kallipolitis
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Agata Krawczyk-Balska
- Department of Molecular Microbiology, Biological and Chemical Research Centre, Faculty of Biology, University of Warsaw, Warsaw, Poland
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6
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Sanz-García F, Laborda P, Ochoa-Sánchez LE, Martínez JL, Hernando-Amado S. The Pseudomonas aeruginosa Resistome: Permanent and Transient Antibiotic Resistance, an Overview. Methods Mol Biol 2024; 2721:85-102. [PMID: 37819517 DOI: 10.1007/978-1-0716-3473-8_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
One of the most concerning characteristics of Pseudomonas aeruginosa is its low susceptibility to several antibiotics of common use in clinics, as well as its facility to acquire increased resistance levels. Consequently, the study of the antibiotic resistance mechanisms of this bacterium is of relevance for human health. For such a study, different types of resistance should be distinguished. The intrinsic resistome is composed of a set of genes, present in the core genome of P. aeruginosa, which contributes to its characteristic, species-specific, phenotype of susceptibility to antibiotics. Acquired resistance refers to those genetic events, such as the acquisition of mutations or antibiotic resistance genes that reduce antibiotic susceptibility. Finally, antibiotic resistance can be transiently acquired in the presence of specific compounds or under some growing conditions. The current article provides information on methods currently used to analyze intrinsic, mutation-driven, and transient antibiotic resistance in P. aeruginosa.
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Affiliation(s)
| | - Pablo Laborda
- Centro Nacional de Biotecnología, CSIC, Madrid, Spain
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7
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Vitale M. Antibiotic Resistance: Do We Need Only Cutting-Edge Methods, or Can New Visions Such as One Health Be More Useful for Learning from Nature? Antibiotics (Basel) 2023; 12:1694. [PMID: 38136728 PMCID: PMC10740918 DOI: 10.3390/antibiotics12121694] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 11/30/2023] [Accepted: 12/01/2023] [Indexed: 12/24/2023] Open
Abstract
Antibiotic resistance is an increasing global problem for public health, and focusing on biofilms has provided further insights into resistance evolution in bacteria. Resistance is innate in many bacterial species, and many antibiotics are derived from natural molecules of soil microorganisms. Is it possible that nature can help control AMR diffusion? In this review, an analysis of resistance mechanisms is summarized, and an excursus of the different approaches to challenging resistance spread based on natural processes is presented as "lessons from Nature". On the "host side", immunotherapy strategies for bacterial infections have a long history before antibiotics, but continuous new inputs through biotechnology advances are enlarging their applications, efficacy, and safety. Antimicrobial peptides and monoclonal antibodies are considered for controlling antibiotic resistance. Understanding the biology of natural predators is providing new, effective, and safe ways to combat resistant bacteria. As natural enemies, bacteriophages were used to treat severe infections before the discovery of antibiotics, marginalized during the antibiotic era, and revitalized upon the diffusion of multi-resistance. Finally, sociopolitical aspects such as education, global action, and climate change are also considered as important tools for tackling antibiotic resistance from the One Health perspective.
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Affiliation(s)
- Maria Vitale
- Genetics of Microorganisms Laboratory, Molecular Biology Department, Istituto Zooprofilattico Sperimentale della Sicilia "A. Mirri", 90129 Palermo, Italy
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8
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Brown P, Hernandez K, Parsons C, Chen Y, Gould N, DePerno CS, Niedermeyer J, Kathariou S. Tetracycline resistance in Listeria monocytogenes and L. innocua from wild black bears ( Ursus americanus) in the United States is mediated by novel transposable elements. Appl Environ Microbiol 2023; 89:e0120523. [PMID: 37888979 PMCID: PMC10686073 DOI: 10.1128/aem.01205-23] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 09/17/2023] [Indexed: 10/28/2023] Open
Abstract
IMPORTANCE Listeria monocytogenes causes severe foodborne illness and is the only human pathogen in the genus Listeria. Previous surveys of AMR in Listeria focused on clinical sources and food or food processing environments, with AMR in strains from wildlife and other natural ecosystems remaining under-explored. We analyzed 185 sequenced strains from wild black bears (Ursus americanus) from the United States, including 158 and 27 L. monocytogenes and L. innocua, respectively. Tetracycline resistance was the most prevalent resistance trait. In L. monocytogenes, it was encountered exclusively in serotype 4b strains with the novel Tn916-like element Tn916.1039. In contrast, three distinct, novel tetracycline resistance elements (Tn5801.UAM, Tn5801.551, and Tn6000.205) were identified in L. innocua. Interestingly, Tn5801.551 was identical to elements in L. monocytogenes from a major foodborne outbreak in the United States in 2011. The findings suggest the importance of wildlife and non-pathogenic Listeria species as reservoir for resistance elements in Listeria.
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Affiliation(s)
- Phillip Brown
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, North Carolina, USA
| | - Kevin Hernandez
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Cameron Parsons
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Yi Chen
- Division of Microbiology, Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, Maryland, USA
| | - Nicholas Gould
- Fisheries, Wildlife, and Conservation Biology, Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, North Carolina, USA
| | - Christopher S. DePerno
- Fisheries, Wildlife, and Conservation Biology, Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, North Carolina, USA
| | - Jeffrey Niedermeyer
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Sophia Kathariou
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, North Carolina, USA
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, North Carolina, USA
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9
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Centorotola G, Ziba MW, Cornacchia A, Chiaverini A, Torresi M, Guidi F, Cammà C, Bowa B, Mtonga S, Magambwa P, D’Alterio N, Scacchia M, Pomilio F, Muuka G. Listeria monocytogenes in ready to eat meat products from Zambia: phenotypical and genomic characterization of isolates. Front Microbiol 2023; 14:1228726. [PMID: 37711697 PMCID: PMC10498467 DOI: 10.3389/fmicb.2023.1228726] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 08/17/2023] [Indexed: 09/16/2023] Open
Abstract
The contamination of ready to eat foods (RTE) products due to Listeria monocytogenes could compromise the products safety becoming a great risk for the consumers. The high presence of L. monocytogenes in RTE products has been described worldwide, but few data are available about these products from African countries. The aims of this study were to report the presence of L. monocytogenes in Zambian RTE products, providing genomic characterization and data on similarity with African circulating strains using whole genome sequencing (WGS). A total of 304 RTE products, produced by different Zambian manufacturers, were purchased at retail, from major supermarkets located in Lusaka, Zambia, comprising 130 dairy and 174 meat products. L. monocytogenes was detected only in 18 (10.3%) RTE meat products of the 174 samples tested. The MLST analysis grouped the 18 L. monocytogenes isolates in 7 clonal complexes (CCs): CC1 (n = 5), CC2 (n = 4), CC9 (n = 4), CC5 (n = 2), CC121 (n = 1), CC155 (n = 1), and CC3 (n = 1). According to the cgMLST results, several clusters were detected, in particular belonging to hyper-virulent clones CC1 and CC2. Regarding the virulence factors, a complete L. monocytogenes Pathogenicity Island 3 (LIPI-3) was present both in the CC1 and CC3, in addition to LIPI-1. Several resistance genes and mobile genetic elements were detected, including Stress Islands, the bcrABC cassette and Tn6188_qac transposon, plasmids and intact prophages. Despite being a first preliminary work with a limited number of samples and isolates, this study helped to increase existing knowledge on contaminated RTE products in Zambia, confirming the presence of hyper-virulent L. monocytogenes CCs, which could play an important role in human diseases, posing a public health concern for consumers.
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Affiliation(s)
- Gabriella Centorotola
- Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise “G. Caporale”, Teramo, Italy
| | - Maureen Wakwamba Ziba
- Central Veterinary Research Institute, Ministry of Fisheries and Livestock, Lusaka, Zambia
| | - Alessandra Cornacchia
- Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise “G. Caporale”, Teramo, Italy
| | - Alexandra Chiaverini
- Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise “G. Caporale”, Teramo, Italy
| | - Marina Torresi
- Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise “G. Caporale”, Teramo, Italy
| | - Fabrizia Guidi
- Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise “G. Caporale”, Teramo, Italy
| | - Cesare Cammà
- Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise “G. Caporale”, Teramo, Italy
| | - Benson Bowa
- Central Veterinary Research Institute, Ministry of Fisheries and Livestock, Lusaka, Zambia
| | - Samson Mtonga
- Central Veterinary Research Institute, Ministry of Fisheries and Livestock, Lusaka, Zambia
| | - Phelly Magambwa
- Central Veterinary Research Institute, Ministry of Fisheries and Livestock, Lusaka, Zambia
| | - Nicola D’Alterio
- Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise “G. Caporale”, Teramo, Italy
| | - Massimo Scacchia
- Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise “G. Caporale”, Teramo, Italy
| | - Francesco Pomilio
- Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise “G. Caporale”, Teramo, Italy
| | - Geoffrey Muuka
- Central Veterinary Research Institute, Ministry of Fisheries and Livestock, Lusaka, Zambia
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10
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Hanes R, Zhang F, Huang Z. Protein Interaction Network Analysis to Investigate Stress Response, Virulence, and Antibiotic Resistance Mechanisms in Listeria monocytogenes. Microorganisms 2023; 11:microorganisms11040930. [PMID: 37110353 PMCID: PMC10144942 DOI: 10.3390/microorganisms11040930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/29/2023] [Accepted: 03/31/2023] [Indexed: 04/05/2023] Open
Abstract
Listeria monocytogenes is a deadly and costly foodborne pathogen that has a high fatality rate in the elderly, pregnant women, and people with weakened immunity. It can survive under various stress conditions and is a significant concern for the food industry. In this work, a data analysis approach was developed with existing tools and databases and used to create individual and combined protein interaction networks to study stress response, virulence, and antimicrobial resistance and their interaction with L. monocytogenes. The networks were analyzed, and 28 key proteins were identified that may serve as potential targets for new strategies to combat L. monocytogenes. Five of the twenty-eight proteins (i.e., sigB, flaA, cheA, cheY, and lmo0693) represent the most promising targets because they are highly interconnected within the combined network. The results of this study provide a new set of targets for future work to identify new strategies to improve food preservation methods and treatments for L. monocytogenes.
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Affiliation(s)
- Robert Hanes
- Department of Chemical Engineering, Villanova University, Villanova, PA 19085, USA
| | - Fangyuan Zhang
- Department of Chemical Engineering, Villanova University, Villanova, PA 19085, USA
| | - Zuyi Huang
- Department of Chemical Engineering, Villanova University, Villanova, PA 19085, USA
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11
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Sun S, Wang M, Xiang J, Shao Y, Li L, Sedjoah RCAA, Wu G, Zhou J, Xin Z. BON domain-containing protein-mediated co-selection of antibiotic and heavy metal resistance in bacteria. Int J Biol Macromol 2023; 238:124062. [PMID: 36933600 DOI: 10.1016/j.ijbiomac.2023.124062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 03/12/2023] [Accepted: 03/13/2023] [Indexed: 03/17/2023]
Abstract
The widespread antibiotic resistance of bacteria has become one of the most severe threats to public health. However, the mechanisms that allow microbial acquisition of resistance are still poorly understood. In the present study, a novel BON domain-containing protein was heterologously expressed in Escherichia coli. It functions as an efflux pump-like to confer resistance to various antibiotics, especially for ceftazidime, with a >32-fold increase in minimum inhibitory concentration (MIC). The fluorescence spectroscopy experiment indicated that BON protein could interact with several metal ions, such as copper and silver, which has been associated with the induced co-regulation of antibiotic and heavy metal resistance in bacteria. Furthermore, the BON protein was demonstrated to spontaneously self-assemble into a trimer and generate a central pore-like architecture for antibiotic transporting. A WXG motif as a molecular switch is essential for forming the transmembrane oligomeric pores and controls the interaction between BON protein and cell membrane. Based on these findings, a mechanism termed "one-in, one-out", was proposed for the first time. The present study provides new insights into the structure and function of BON protein and a previously unidentified antibiotic resistance mechanism, filling the knowledge gap in understanding BON protein-mediated intrinsic antibiotic resistance.
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Affiliation(s)
- Shengwei Sun
- Key Laboratory of Food Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Mengxi Wang
- Key Laboratory of Food Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Jiahui Xiang
- Key Laboratory of Food Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yuting Shao
- Key Laboratory of Food Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Longxiang Li
- Key Laboratory of Food Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Rita-Cindy Aye-Ayire Sedjoah
- Key Laboratory of Food Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Guojun Wu
- Key Laboratory of Food Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Jingjie Zhou
- Key Laboratory of Food Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Zhihong Xin
- Key Laboratory of Food Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China.
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12
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Ghosh R, León-Ruiz M, Sardar SS, Lalsing D P, Benito-León J. Downbeat Nystagmus as a Presenting Manifestation of Neurolisteriosis in a Pregnant Woman. Neuroophthalmology 2023; 47:218-224. [PMID: 37434673 PMCID: PMC10332207 DOI: 10.1080/01658107.2023.2186431] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023] Open
Abstract
Listeria monocytogenes has tropism towards two immunologically "privileged" sites, the fetoplacental unit in pregnant women and the central nervous system (neurolisteriosis) in immunocompromised individuals. We report a case of neurolisteriosis in a previously asymptomatic pregnant woman from rural West Bengal, India, who presented with a subacute onset febrile illness with features of rhombencephalitis and a predominantly midline-cerebellopathy (slow and dysmetric saccades, florid downbeat nystagmus, horizontal nystagmus, and ataxia). With timely detection and the institution of prolonged intravenous antibiotic therapy, both the mother and the fetus were saved uneventfully.
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Affiliation(s)
- Ritwik Ghosh
- Department of General Medicine, Burdwan Medical College and Hospital, Burdwan, India
| | - Moisés León-Ruiz
- Section of Clinical Neurophysiology, Department of Neurology, University Hospital “La Paz”, Madrid, Spain
| | - Sona Singh Sardar
- Department of General Medicine, Burdwan Medical College and Hospital, Burdwan, India
| | - Padavi Lalsing D
- Department of General Medicine, Burdwan Medical College and Hospital, Burdwan, India
| | - Julián Benito-León
- Department of Neurology, University Hospital “12 de Octubre”, Madrid, Spain
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
- Department of Medicine, Complutense University, Madrid, Spain
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13
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Tholany J, Samra H, Kobayashi T, Prasidthrathsint K. Primary spontaneous listerial peritonitis. IDCases 2023; 32:e01748. [PMID: 36974133 PMCID: PMC10038783 DOI: 10.1016/j.idcr.2023.e01748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/15/2023] [Accepted: 03/15/2023] [Indexed: 03/18/2023] Open
Abstract
A male in his mid-60s with chronic kidney disease, ischemic cardiomyopathy, and nonalcoholic cirrhosis due to congestive hepatopathy presented with fever and abdominal pain for two weeks. He underwent diagnostic paracentesis, which noted an ascitic neutrophil count over 7000/mm3. Gram stain of the ascitic fluid showed Gram-positive cocci. He was diagnosed with spontaneous bacterial peritonitis (SBP) and was started on ceftriaxone. Ascites cultures grew Listeria monocytogenes and antibiotics were changed to ampicillin. He received one week of ampicillin while inpatient and seven weeks of oral amoxicillin, at which point his ascitic neutrophil count was less than 250/mm3. He was continued on suppressive amoxicillin for an additional 14 weeks with no recurrence in over a year after the discontinuation of amoxicillin. Though uncommon, L. monocytogenes should be considered a pathogen causing SBP. Focal listerial infections can be treated with penicillins alone while invasive disease may require the addition of aminoglycosides.
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14
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Food for Thought: Proteomics for Meat Safety. Life (Basel) 2023; 13:life13020255. [PMID: 36836616 PMCID: PMC9966529 DOI: 10.3390/life13020255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 01/13/2023] [Accepted: 01/14/2023] [Indexed: 01/18/2023] Open
Abstract
Foodborne bacteria interconnect food and human health. Despite significant progress in food safety regulation, bacterial contamination is still a serious public health concern and the reason for significant commercial losses. The screening of the microbiome in meals is one of the main aspects of food production safety influencing the health of the end-consumers. Our research provides an overview of proteomics findings in the field of food safety made over the last decade. It was believed that proteomics offered an accurate snapshot of the complex networks of the major biological machines called proteins. The proteomic methods for the detection of pathogens were armed with bioinformatics algorithms, allowing us to map the data onto the genome and transcriptome. The mechanisms of the interaction between bacteria and their environment were elucidated with unprecedented sensitivity, specificity, and depth. Using our web-based tool ScanBious for automated publication analysis, we analyzed over 48,000 scientific articles on antibiotic and disinfectant resistance and highlighted the benefits of proteomics for the food safety field. The most promising approach to studying safety in food production is the combination of classical genomic and metagenomic approaches and the advantages provided by proteomic methods with the use of panoramic and targeted mass spectrometry.
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15
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Stincone P, Fonseca Veras F, Micalizzi G, Donnarumma D, Vitale Celano G, Petras D, de Angelis M, Mondello L, Brandelli A. Listeria monocytogenes exposed to antimicrobial peptides displays differential regulation of lipids and proteins associated to stress response. Cell Mol Life Sci 2022; 79:263. [PMID: 35482131 PMCID: PMC11071860 DOI: 10.1007/s00018-022-04292-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 04/03/2022] [Accepted: 04/04/2022] [Indexed: 11/25/2022]
Abstract
With the onset of Listeria monocytogenes resistance to the bacteriocin nisin, the search for alternative antimicrobial treatments is of fundamental importance. In this work, we set out to investigate proteins and lipids involved in the resistance mechanisms of L. monocytogenes against the antimicrobial peptides (AMPs) nisin and fengycin. The effect of sub-lethal concentrations of nisin and lipopeptide fengycin secreted by Bacillus velezensis P34 on L. monocytogenes was investigated by mass spectrometry-based lipidomics and proteomics. Both AMPs caused a differential regulation of biofilm formation, confirming the promotion of cell attachment and biofilm assembling after treatment with nisin, whereas growth inhibition was observed after fengycin treatment. Anteiso branched-chain fatty acids were detected in higher amounts in fengycin-treated samples (46.6%) as compared to nisin-treated and control samples (39.4% and 43.4%, respectively). In addition, a higher relative abundance of 30:0, 31:0 and 32:0 phosphatidylglycerol species was detected in fengycin-treated samples. The lipidomics data suggest the inhibition of biofilm formation by the fengycin treatment, while the proteomics data revealed downregulation of important cell wall proteins involved in the building of biofilms, such as the lipoteichoic acid backbone synthesis (Lmo0927) and the flagella-related (Lmo0718) proteins among others. Together, these results provide new insights into the modification of lipid and protein profiles and biofilm formation in L. monocytogenes upon exposure to antimicrobial peptides.
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Affiliation(s)
- Paolo Stincone
- Laboratório de Bioquímica e Microbiologia Aplicada, ICTA-UFRGS, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, 91501-970, Brazil
| | - Flávio Fonseca Veras
- Laboratório de Bioquímica e Microbiologia Aplicada, ICTA-UFRGS, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, 91501-970, Brazil
| | - Giuseppe Micalizzi
- Chromaleont S.R.L., c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, viale Annunziata, 98168, Polo AnnunziataMessina, Italy
| | - Danilo Donnarumma
- Chromaleont S.R.L., c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, viale Annunziata, 98168, Polo AnnunziataMessina, Italy
| | - Gaetano Vitale Celano
- Department of Veterinary Medicine, University of Bari Aldo Moro, Prov. le Casamassima, km 3, Valenzano, 70010, Bari, Italy
| | - Daniel Petras
- CMFI Cluster of Excellence, Interfaculty Institute of Microbiology and Medicine, University of Tübingen, 72076, Tübingen, Germany
| | - Maria de Angelis
- Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, 70126, Bari, Italy
| | - Luigi Mondello
- Chromaleont S.R.L., c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, viale Annunziata, 98168, Polo AnnunziataMessina, Italy
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Polo Annunziata, viale Annunziata, 98168, Messina, Italy
| | - Adriano Brandelli
- Laboratório de Bioquímica e Microbiologia Aplicada, ICTA-UFRGS, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, 91501-970, Brazil.
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16
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Samant S, Uyemura B, Sarbagya P, Jha P. Listerial Spontaneous Bacterial Peritonitis. Cureus 2022; 14:e22051. [PMID: 35340468 PMCID: PMC8915950 DOI: 10.7759/cureus.22051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/09/2022] [Indexed: 11/05/2022] Open
Abstract
Spontaneous bacterial peritonitis (SBP) is a severe complication of ascites often seen in advanced hepatic disease that is most commonly caused by Gram-negative bacilli. Here, we report a rare case of Listeria monocytogenes SBP, diagnosed by peritoneal fluid culture and responsive to ampicillin, in a patient with portal hypertension secondary to nodular regenerative hyperplasia. Because Listeria species are resistant to empiric SBP therapies and delays in treatment have been associated with increased mortality, they must be considered in high-risk patients.
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17
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Phan TN, Miyamoto T, Masuda Y, Hohjoh KI, Thi ANT. Occurrence, antimicrobial resistance, and genetic diversity of Listeria monocytogenes at fish-processing plants in Vietnam. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2022. [DOI: 10.3136/fstr.fstr-d-21-00195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Trang Nguyen Phan
- Division of Food Science and Biotechnology, Faculty of Agriculture, Kyushu University
| | - Takahisa Miyamoto
- Division of Food Science and Biotechnology, Faculty of Agriculture, Kyushu University
| | - Yoshimitsu Masuda
- Division of Food Science and Biotechnology, Faculty of Agriculture, Kyushu University
| | - Ken-ichi Hohjoh
- Division of Food Science and Biotechnology, Faculty of Agriculture, Kyushu University
| | - Anh Ngoc Tong Thi
- Department of Food Technology, College of Agriculture, Can Tho University
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18
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Novel strategies of essential oils, chitosan, and nano- chitosan for inhibition of multi-drug resistant: E. coli O157:H7 and Listeria monocytogenes. Saudi J Biol Sci 2021; 29:2582-2590. [PMID: 35531141 PMCID: PMC9073063 DOI: 10.1016/j.sjbs.2021.12.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/25/2021] [Accepted: 12/14/2021] [Indexed: 11/21/2022] Open
Abstract
Despite the wide range of available antibiotics, food borne bacteria demonstrate a huge spectrum of resistance. The current study aims to use natural components such as essential oils (EOs), chitosan, and nano-chitosan that have very influential antibacterial properties with novel technologies like chitosan solution/film loaded with EOs against multi-drug resistant bacteria. Two strains of Escherichia coli O157:H7 and three strains of Listeria monocytogenes were used to estimate antibiotics resistance. Ten EOs and their mixture, chitosan, nano-chitosan, chitosan plus EO solutions, and biodegradable chitosan film enriched with EOs were tested as antibacterial agents against pathogenic bacterial strains. Results showed that E. coli O157:H7 51,659 and L. monocytogenes 19,116 relatively exhibited considerable resistance to more than one single antibiotic. Turmeric, cumin, pepper black, and marjoram did not show any inhibition zone against L. monocytogenes; Whereas, clove, thyme, cinnamon, and garlic EOs exhibited high antibacterial activity against L. monocytogenes with minimum inhibitory concentration (MIC) of 250–400 μl 100−1 ml and against E. coli O157:H7 with an MIC of 350–500 μl 100−1 ml, respectively. Among combinations, clove, and thyme EOs showed the highest antibacterial activity against E. coli O157:H7 with MIC of 170 μl 100−1 ml, and the combination of cinnamon and clove EOs showed the strongest antibacterial activity against L. monocytogenes with an MIC of 120 μl 100−1 ml. Both chitosan and nano-chitosan showed a promising potential as an antibacterial agent against pathogenic bacteria as their MICs were relatively lower against L. monocytogenes than for E. coli O157:H7. Chitosan combined with each of cinnamon, clove, and thyme oil have a more effective antibacterial activity against L. monocytogenes and E. coli O157:H7 than the mixture of oils alone. Furthermore, the use of either chitosan solution or biodegradable chitosan film loaded with a combination of clove and thyme EOs had the strongest antibacterial activity against L. monocytogenes and E. coli O157:H7. However, chitosan film without EOs did not exhibit an inhibition zone against the tested bacterial strains.
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19
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Mahmud MS, Hossain MS, Ahmed ATMF, Islam MZ, Sarker ME, Islam MR. Antimicrobial and Antiviral (SARS-CoV-2) Potential of Cannabinoids and Cannabis sativa: A Comprehensive Review. Molecules 2021; 26:7216. [PMID: 34885798 PMCID: PMC8658882 DOI: 10.3390/molecules26237216] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/21/2021] [Accepted: 11/23/2021] [Indexed: 12/26/2022] Open
Abstract
Antimicrobial resistance has emerged as a global health crisis and, therefore, new drug discovery is a paramount need. Cannabis sativa contains hundreds of chemical constituents produced by secondary metabolism, exerting outstanding antimicrobial, antiviral, and therapeutic properties. This paper comprehensively reviews the antimicrobial and antiviral (particularly against SARS-CoV-2) properties of C. sativa with the potential for new antibiotic drug and/or natural antimicrobial agents for industrial or agricultural use, and their therapeutic potential against the newly emerged coronavirus disease (COVID-19). Cannabis compounds have good potential as drug candidates for new antibiotics, even for some of the WHO's current priority list of resistant pathogens. Recent studies revealed that cannabinoids seem to have stable conformations with the binding pocket of the Mpro enzyme of SARS-CoV-2, which has a pivotal role in viral replication and transcription. They are found to be suppressive of viral entry and viral activation by downregulating the ACE2 receptor and TMPRSS2 enzymes in the host cellular system. The therapeutic potential of cannabinoids as anti-inflammatory compounds is hypothesized for the treatment of COVID-19. However, more systemic investigations are warranted to establish the best efficacy and their toxic effects, followed by preclinical trials on a large number of participants.
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Affiliation(s)
- Md Sultan Mahmud
- Faculty of Textile Engineering, Bangladesh University of Textiles, Dhaka 1208, Bangladesh; (M.S.M.); (A.T.M.F.A.); (M.Z.I.)
| | - Mohammad Sorowar Hossain
- Biomedical Research Foundation, Dhaka 1230, Bangladesh;
- School of Environment and Life Sciences, Independent University, Dhaka 1229, Bangladesh
| | - A. T. M. Faiz Ahmed
- Faculty of Textile Engineering, Bangladesh University of Textiles, Dhaka 1208, Bangladesh; (M.S.M.); (A.T.M.F.A.); (M.Z.I.)
| | - Md Zahidul Islam
- Faculty of Textile Engineering, Bangladesh University of Textiles, Dhaka 1208, Bangladesh; (M.S.M.); (A.T.M.F.A.); (M.Z.I.)
| | - Md Emdad Sarker
- Faculty of Textile Engineering, Bangladesh University of Textiles, Dhaka 1208, Bangladesh; (M.S.M.); (A.T.M.F.A.); (M.Z.I.)
| | - Md Reajul Islam
- Faculty of Textile Engineering, Bangladesh University of Textiles, Dhaka 1208, Bangladesh; (M.S.M.); (A.T.M.F.A.); (M.Z.I.)
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20
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Costello KM, Velliou E, Gutierrez-Merino J, Smet C, Kadri HE, Impe JFV, Bussemaker M. The effect of ultrasound treatment in combination with nisin on the inactivation of Listeria innocua and Escherichia coli. ULTRASONICS SONOCHEMISTRY 2021; 79:105776. [PMID: 34662803 PMCID: PMC8560821 DOI: 10.1016/j.ultsonch.2021.105776] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 09/27/2021] [Accepted: 09/29/2021] [Indexed: 05/21/2023]
Abstract
Ultrasound, alone or in combination with natural antimicrobials, is a novel food processing technology of interest to replace traditional food decontamination methods, as it is milder than classical sterilisation (heat treatment) and maintains desirable sensory characteristics. However, ultrasound efficacy can be affected by food structure/composition, as well as the order in which combined treatments are applied. More specifically, treatments which target different cell components could result in enhanced inactivation if applied in the appropriate order. The microbial properties i.e. Gram positive/Gram negative can also impact the treatment efficacy. This work presents a systematic study of the combined effect of ultrasound and nisin on the inactivation of the bacteria Listeria innocua (Gram positive) and Escherichia coli (Gram negative), at a range of cavitation conditions (44, 500, 1000 kHz). The order of treatment application was varied, and the impact of system structure was also investigated by varying the concentration of Xanthan gum used to create the food model systems (0 - 0.5% w/v). Microbial inactivation kinetics were monitored, and advanced microscopy and flow cytometry techniques were utilised to quantify the impact of treatment on a cellular level. Ultrasound was shown to be effective against E. coli at 500 kHz only, with L. innocua demonstrating resistance to all frequencies studied. Enhanced inactivation of E. coli was observed for the combination of nisin and ultrasound at 500 kHz, but only when nisin was applied before ultrasound treatment. The system structure negatively impacted the inactivation efficacy. The combined effect of ultrasound and nisin on E. coli was attributed to short-lived destabilisation of the outer membrane as a result of sonication, allowing nisin to penetrate the cytoplasmic membrane and facilitate cell inactivation.
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Affiliation(s)
- Katherine M Costello
- Department of Chemical and Process Engineering, University of Surrey, Guildford GU2 7XH, UK.
| | - Eirini Velliou
- Department of Chemical and Process Engineering, University of Surrey, Guildford GU2 7XH, UK; Centre for 3D Models of Health and Disease, Division of Surgery and Interventional Science, University College London, London W1W 7TY, UK
| | | | - Cindy Smet
- BioTeC+ Chemical and Biochemical Process Technology and Control, KU Leuven Campus Gent, Gent, Belgium
| | - Hani El Kadri
- Department of Chemical and Process Engineering, University of Surrey, Guildford GU2 7XH, UK
| | - Jan F Van Impe
- BioTeC+ Chemical and Biochemical Process Technology and Control, KU Leuven Campus Gent, Gent, Belgium
| | - Madeleine Bussemaker
- Department of Chemical and Process Engineering, University of Surrey, Guildford GU2 7XH, UK.
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21
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Gil-Gil T, Ochoa-Sánchez LE, Baquero F, Martínez JL. Antibiotic resistance: Time of synthesis in a post-genomic age. Comput Struct Biotechnol J 2021; 19:3110-3124. [PMID: 34141134 PMCID: PMC8181582 DOI: 10.1016/j.csbj.2021.05.034] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 05/13/2021] [Accepted: 05/20/2021] [Indexed: 12/20/2022] Open
Abstract
Antibiotic resistance has been highlighted by international organizations, including World Health Organization, World Bank and United Nations, as one of the most relevant global health problems. Classical approaches to study this problem have focused in infected humans, mainly at hospitals. Nevertheless, antibiotic resistance can expand through different ecosystems and geographical allocations, hence constituting a One-Health, Global-Health problem, requiring specific integrative analytic tools. Antibiotic resistance evolution and transmission are multilayer, hierarchically organized processes with several elements (from genes to the whole microbiome) involved. However, their study has been traditionally gene-centric, each element independently studied. The development of robust-economically affordable whole genome sequencing approaches, as well as other -omic techniques as transcriptomics and proteomics, is changing this panorama. These technologies allow the description of a system, either a cell or a microbiome as a whole, overcoming the problems associated with gene-centric approaches. We are currently at the time of combining the information derived from -omic studies to have a more holistic view of the evolution and spread of antibiotic resistance. This synthesis process requires the accurate integration of -omic information into computational models that serve to analyse the causes and the consequences of acquiring AR, fed by curated databases capable of identifying the elements involved in the acquisition of resistance. In this review, we analyse the capacities and drawbacks of the tools that are currently in use for the global analysis of AR, aiming to identify the more useful targets for effective corrective interventions.
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Affiliation(s)
- Teresa Gil-Gil
- Centro Nacional de Biotecnología, CSIC, Darwin 3, 28049 Madrid, Spain
| | | | - Fernando Baquero
- Department of Microbiology, Hospital Universitario Ramón y Cajal (IRYCIS), Madrid, Spain
- CIBER en Epidemiología y Salud Pública (CIBER-ESP), Madrid, Spain
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22
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Fischer MA, Wamp S, Fruth A, Allerberger F, Flieger A, Halbedel S. Population structure-guided profiling of antibiotic resistance patterns in clinical Listeria monocytogenes isolates from Germany identifies pbpB3 alleles associated with low levels of cephalosporin resistance. Emerg Microbes Infect 2021; 9:1804-1813. [PMID: 32691687 PMCID: PMC7473133 DOI: 10.1080/22221751.2020.1799722] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Numbers of listeriosis illnesses have been increasing in Germany and the European Union during the last decade. In addition, reports on the occurrence of antibiotic resistance in Listeria monocytogenes in clinical and environmental isolates are accumulating. The susceptibility towards 14 antibiotics was tested in a selection of clinical L. monocytogenes isolates to get a more precise picture of the development and manifestation of antibiotic resistance in the L. monocytogenes population. Based on the population structure determined by core genome multi locus sequence typing (cgMLST) 544 out of 1220 sequenced strains collected in Germany between 2009 and 2019 were selected to cover the phylogenetic diversity observed in the clinical L. monocytogenes population. All isolates tested were susceptible towards ampicillin, penicillin and co-trimoxazole – the most relevant antibiotics in the treatment of listeriosis. Resistance to daptomycin and ciprofloxacin was observed in 493 (91%) and in 71 (13%) of 544 isolates, respectively. While all tested strains showed resistance towards ceftriaxone, their resistance levels varied widely between 4 mg/L and >128 mg/L. An allelic variation of the penicillin binding protein gene pbpB3 was identified as the cause of this difference in ceftriaxone resistance levels. This study is the first population structure-guided analysis of antimicrobial resistance in recent clinical isolates and confirms the importance of penicillin binding protein B3 (PBP B3) for the high level of intrinsic cephalosporin resistance of L. monocytogenes on a population-wide scale.
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Affiliation(s)
- Martin A Fischer
- FG11 Division of Enteropathogenic bacteria and Legionella, Robert Koch Institute, Wernigerode, Germany
| | - Sabrina Wamp
- FG11 Division of Enteropathogenic bacteria and Legionella, Robert Koch Institute, Wernigerode, Germany
| | - Angelika Fruth
- FG11 Division of Enteropathogenic bacteria and Legionella, Robert Koch Institute, Wernigerode, Germany
| | | | - Antje Flieger
- FG11 Division of Enteropathogenic bacteria and Legionella, Robert Koch Institute, Wernigerode, Germany.,German Consultant Laboratory for Listeria, Robert Koch Institute, Wernigerode, Germany
| | - Sven Halbedel
- FG11 Division of Enteropathogenic bacteria and Legionella, Robert Koch Institute, Wernigerode, Germany.,German Consultant Laboratory for Listeria, Robert Koch Institute, Wernigerode, Germany
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23
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Listeria monocytogenes Peritonitis in a Patient Receiving Continuous Ambulatory Peritoneal Dialysis: A Case Report and Review of the Literature. Case Rep Nephrol 2021; 2021:6681629. [PMID: 33575047 PMCID: PMC7861955 DOI: 10.1155/2021/6681629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 11/21/2022] Open
Abstract
Listeria monocytogenes is a rare cause of peritoneal dialysis-related peritonitis. Only a handful of cases have been reported, and the optimal management is still uncertain. We present a case of Listeria monocytogenes peritonitis and perform a review of the literature to elucidate optimal antibiotic therapy.
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24
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Stincone P, Comerlato CB, Brandelli A. Proteomic analysis of Listeria monocytogenes exposed to free and nanostructured antimicrobial lipopeptides. Mol Omics 2021; 17:426-437. [PMID: 33735358 DOI: 10.1039/d0mo00178c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In this work, the effect of antimicrobial lipopeptide P34 on Listeria monocytogenes was evaluated for the first time through a proteomics approach. Bacteria were treated with sub-lethal doses of peptide P34 (F-P34) and P34 encapsulated into nanoliposomes (N-P34), while empty nanoliposomes (NE) and fresh buffer were used as controls. The proteomic analysis allowed the detection of one group of proteins commonly differentially represented in response to free and encapsulated P34 exposure. A second group of proteins was found to be exclusively differentially represented after exposure with encapsulated P34 only. The antimicrobial peptide P34 caused a significant downregulation of proteins associated with the transport of manganese and the over-representation of proteins related with iron transport in L. monocytogenes. In addition, reduction of stress tolerance proteins related to the σB and VirR regulons, together with the modulation of phosphoenolpyruvate phosphotransferase systems (PTS) for sugar transport were observed. The sugar and oligopeptide transporters regulated by antimicrobial action may influence the key virulence factor PrfA, reducing the pathogenicity of this microorganism.
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Affiliation(s)
- Paolo Stincone
- Laboratório de Bioquímica e Microbiologia Aplicada, Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91501-970 Porto Alegre, Brazil.
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25
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Baquero F, F Lanza V, Duval M, Coque TM. Ecogenetics of antibiotic resistance in Listeria monocytogenes. Mol Microbiol 2020; 113:570-579. [PMID: 32185838 DOI: 10.1111/mmi.14454] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Revised: 12/25/2019] [Accepted: 01/09/2020] [Indexed: 12/17/2022]
Abstract
The acquisition process of antibiotic resistance in an otherwise susceptible organism is shaped by the ecology of the species. Unlike other relevant human pathogens, Listeria monocytogenes has maintained a high rate of susceptibility to the antibiotics used for decades to treat human and animal infections. However, L. monocytogenes can acquire antibiotic resistance genes from other organisms' plasmids and conjugative transposons. Ecological factors could account for its susceptibility. L. monocytogenes is ubiquitous in nature, most frequently including reservoirs unexposed to antibiotics, including intracellular sanctuaries. L. monocytogenes has a remarkably closed genome, reflecting limited community interactions, small population sizes and high niche specialization. The L. monocytogenes species is divided into variants that are specialized in small specific niches, which reduces the possibility of coexistence with potential donors of antibiotic resistance. Interactions with potential donors are also hampered by interspecies antagonism. However, occasional increases in population sizes (and thus the possibility of acquiring antibiotic resistance) can derive from selection of the species based on intrinsic or acquired resistance to antibiotics, biocides, heavy metals or by a natural tolerance to extreme conditions. High-quality surveillance of the emergence of resistance to the key drugs used in primary therapy is mandatory.
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Affiliation(s)
- Fernando Baquero
- Department of Microbiology, Ramón y Cajal Institute for Health Research, Ramón y Cajal University Hospital, Madrid, Spain
| | - Val F Lanza
- Department of Microbiology, Ramón y Cajal Institute for Health Research, Ramón y Cajal University Hospital, Madrid, Spain.,Bioinformatics Unit, Ramón y Cajal Institute for Health Research, Ramón y Cajal University Hospital, Madrid, Spain
| | - Mélodie Duval
- Département de Biologie Cellulaire et Infection, Unité des interactions Bactéries-Cellules, Institut Pasteur, and Inserm, Paris, France
| | - Teresa M Coque
- Department of Microbiology, Ramón y Cajal Institute for Health Research, Ramón y Cajal University Hospital, Madrid, Spain
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Teixeira LA, Carvalho FT, Vallim DC, Pereira RC, Cunha Neto A, Vieira BS, Carvalho RC, Figueiredo EE. Listeria monocytogenes in Export-approved Beef from Mato Grosso, Brazil: Prevalence, Molecular Characterization and Resistance to Antibiotics and Disinfectants. Microorganisms 2019; 8:microorganisms8010018. [PMID: 31861870 PMCID: PMC7023217 DOI: 10.3390/microorganisms8010018] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 09/29/2019] [Accepted: 10/14/2019] [Indexed: 12/31/2022] Open
Abstract
The Brazilian state of Mato Grosso is the largest producer and exporter of beef in the country, but few studies of relevance have been conducted to evaluate the microbiological safety of its products. This study aimed to estimate the prevalence of Listeria monocytogenes (LM) in export-approved beef from Mato Grosso and to characterize the isolates in terms of molecular properties and antimicrobial resistance. From a total of 50 samples analyzed, Listeria sp. was isolated in 18 (36% prevalence). Listeria monocytogenes was confirmed in 6 (12% prevalence). Among the serotype groups assessed by multiplex PCR, serotype 4 (4b, 4d or 4e) was the most prevalent. Although antibiotic resistance was not an issue, two strains isolated from different plants showed high resistance to sodium hypochlorite. Overall, this scenario causes concern because it puts at risk not only the Brazilian customer, but also the population of countries that import beef from Mato Grosso.
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Affiliation(s)
- Larrayane A.C. Teixeira
- College of Nutrition, Federal University of Mato Grosso, 78060-900 Cuiabá, MT, Brazil (F.T.C.); (A.C.N.)
| | - Fernanda T. Carvalho
- College of Nutrition, Federal University of Mato Grosso, 78060-900 Cuiabá, MT, Brazil (F.T.C.); (A.C.N.)
| | - Deyse C. Vallim
- Laboratory of Bacterial Zoonoses, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, 21040-360 Rio de Janeiro, RJ, Brazil; (D.C.V.)
| | - Rodrigo C.L. Pereira
- Laboratory of Bacterial Zoonoses, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, 21040-360 Rio de Janeiro, RJ, Brazil; (D.C.V.)
| | - Adelino Cunha Neto
- College of Nutrition, Federal University of Mato Grosso, 78060-900 Cuiabá, MT, Brazil (F.T.C.); (A.C.N.)
| | - Bruno S. Vieira
- College of Animal Science, Federal Institute of Education, Science and Technology of Mato Grosso, 78580-000 Alta Floresta, MT, Brazil
- Correspondence: (B.S.V.); (E.E.S.F.); Tel.: +55-66-3512-7000 (B.S.V.); +55-65-3615-8811 (E.E.S.F.)
| | - Ricardo C.T. Carvalho
- College of Nutrition, Federal University of Mato Grosso, 78060-900 Cuiabá, MT, Brazil (F.T.C.); (A.C.N.)
| | - Eduardo E.S. Figueiredo
- College of Nutrition, Federal University of Mato Grosso, 78060-900 Cuiabá, MT, Brazil (F.T.C.); (A.C.N.)
- Correspondence: (B.S.V.); (E.E.S.F.); Tel.: +55-66-3512-7000 (B.S.V.); +55-65-3615-8811 (E.E.S.F.)
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Osman KM, Kappell AD, Fox EM, Orabi A, Samir A. Prevalence, Pathogenicity, Virulence, Antibiotic Resistance, and Phylogenetic Analysis of Biofilm-Producing Listeria monocytogenes Isolated from Different Ecological Niches in Egypt: Food, Humans, Animals, and Environment. Pathogens 2019; 9:E5. [PMID: 31861483 PMCID: PMC7168649 DOI: 10.3390/pathogens9010005] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/07/2019] [Accepted: 12/09/2019] [Indexed: 02/07/2023] Open
Abstract
Serious outbreaks of foodborne disease have been caused by Listeria monocytogenes found in retail delicatessens and the severity of disease is significant, with high hospitalization and mortality rates. Little is understood about the formidable public health threat of L. monocytogenes in all four niches, humans, animals, food, and environment, in Egypt. This study analyzed the presence of L. monocytogenes collected from the four environmental niches and bioinformatics analysis was implemented to analyze and compare the data. PCR was used to detect virulence genes encoded by pathogenicity island (LIPI-1). prfA amino acid substation that causes constitutive expression of virulence was common in 77.7% of isolates. BLAST analysis did not match other isolates in the NCBI database, suggesting this may be a characteristic of the region associated with these isolates. A second group included the NH1 isolate originating in China, and BLAST analysis showed this prfA allele was shared with isolates from other global locations, such as Europe and North America. Identification of possible links and transmission pathways between the four niches helps to decrease the risk of disease in humans, to take more specific control measures in the context of disease prevention, to limit economic losses associated with food recalls, and highlights the need for treatment options.
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Affiliation(s)
- Kamelia M. Osman
- Department of Microbiology, Faculty of Veterinary Medicine, Cairo University, Cairo 12211, Egypt; (A.O.); (A.S.)
| | - Anthony D. Kappell
- Water Quality Center, Department of Civil, Construction and Environmental Engineering, Marquette University, Milwaukee, WI 53233, USA;
| | - Edward M. Fox
- Department of Applied Sciences, North Umbria University, Newcastle upon Tyne NE1 2SU, UK;
| | - Ahmed Orabi
- Department of Microbiology, Faculty of Veterinary Medicine, Cairo University, Cairo 12211, Egypt; (A.O.); (A.S.)
| | - Ahmed Samir
- Department of Microbiology, Faculty of Veterinary Medicine, Cairo University, Cairo 12211, Egypt; (A.O.); (A.S.)
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Wang G, Zhao H, Zheng B, Li D, Yuan Y, Han Q, Tian Z, Zhang J. TLR2 Promotes Monocyte/Macrophage Recruitment Into the Liver and Microabscess Formation to Limit the Spread of Listeria Monocytogenes. Front Immunol 2019; 10:1388. [PMID: 31297109 PMCID: PMC6607897 DOI: 10.3389/fimmu.2019.01388] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 06/03/2019] [Indexed: 12/24/2022] Open
Abstract
TLR2 signaling plays a critical protective role against acute Listeria monocytogenes (Lm) infection by up-regulating inflammatory cytokines and promoting macrophage antimicrobial capabilities. However, the underlying mechanism by which TLR2 regulates hepatic macrophage-mediated anti-Lm immune responses remains poorly understood. In this study, we found that both the absolute number and proportion of monocyte/macrophage (Mo/MΦ) in the liver and spleen of Tlr2 -/- mice were significantly lower compared to wild type mice. Changes in TLR2 signaling in both hepatocytes and Mo/MΦs were associated with the infiltration of Mo/MΦs in response to Lm-infection. Analyses by proteome profiler array and ELISA revealed that hepatocytes recruited Mo/MΦs via TLR2-dependent secretion of CCL2 and CXCL1, which was confirmed by receptor blocking and exogenous chemokine administration. Importantly, we found that TLR2 contributed to macrophage mobility in the liver through a TLR2/NO/F-actin pathway, facilitating the formation of macrophage-associated hepatic microabscesses. Moreover, TLR2 activation induced the expression of several PRRs on hepatic macrophages associated with the recognition of Lm and augmented macrophage bacterial clearance activity. Our findings provide insight into the intrinsic mechanisms of TLR2-induced Mo/MΦ migration and mobility, as well as the interaction between macrophages and hepatocytes in resistance to Lm infection.
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Affiliation(s)
- Guan Wang
- School of Pharmaceutical Sciences, Institute of Immunopharmaceutical Sciences, Shandong University, Jinan, China
| | - Huajun Zhao
- School of Pharmaceutical Sciences, Institute of Immunopharmaceutical Sciences, Shandong University, Jinan, China
| | - Bingqing Zheng
- School of Pharmaceutical Sciences, Institute of Immunopharmaceutical Sciences, Shandong University, Jinan, China
| | - Dongxuan Li
- School of Pharmaceutical Sciences, Institute of Immunopharmaceutical Sciences, Shandong University, Jinan, China
| | - Yi Yuan
- School of Pharmaceutical Sciences, Institute of Immunopharmaceutical Sciences, Shandong University, Jinan, China
| | - Qiuju Han
- School of Pharmaceutical Sciences, Institute of Immunopharmaceutical Sciences, Shandong University, Jinan, China
| | - Zhigang Tian
- School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Jian Zhang
- School of Pharmaceutical Sciences, Institute of Immunopharmaceutical Sciences, Shandong University, Jinan, China
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Markowska K, Grudniak AM, Milczarek B, Wolska KI. The Effect of Silver Nanoparticles on Listeria monocytogenes PCM2191 Peptidoglycan Metabolism and Cell Permeability. Pol J Microbiol 2019; 67:315-320. [PMID: 30451448 PMCID: PMC7256742 DOI: 10.21307/pjm-2018-037] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/10/2018] [Indexed: 12/28/2022] Open
Abstract
Listeria monocytogenes is Gram-positive bacterial pathogen, a causative agent of food poisoning and systemic disease – listeriosis. This species is still susceptible to several conventionally used antibiotics but an increase in its resistance has been reported. For this reason the search for new, alternative therapies is an urgent task. Silver nanoparticles seem to be the promising antibacterial agent. Minimal inhibitory concentration of silver nanoparticles was determined. Sublethal concentrations were used in study of nanosilver effect on cells lysis by estimation of the number of cells surviving the treatment with 0.25 or 0.5 of minimal inhibitory concentrations of silver nanoparticles. Autolysis of isolated peptidoglycan was studied by measuring the absorbance of preparation subjected to nanosilver treatment. Silver nanoparticles effect on L. monocytogenes envelopes permeability was determined by measuring the efflux of cF, DNA and proteins. It was demonstrated that nanosilver enhanced the lysis of L. monocytogenes cells and, to the lesser extent, autolysis of isolated peptidoglycan. The increase in the efflux of carboxyfluoresceine, DNA and proteins was also noted. The obtained results allow to postulate that L. monocytogenes peptidoglycan, constituting the main component of cell wall, is the target of silver nanoparticles activity against this pathogen.
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Affiliation(s)
- Katarzyna Markowska
- Department of Bacterial Genetics, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Anna Maria Grudniak
- Department of Bacterial Genetics, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Barbara Milczarek
- Department of Bacterial Genetics, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Krystyna Izabella Wolska
- Department of Bacterial Genetics, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
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Role and regulation of the stress activated sigma factor sigma B (σ B) in the saprophytic and host-associated life stages of Listeria monocytogenes. ADVANCES IN APPLIED MICROBIOLOGY 2019; 106:1-48. [PMID: 30798801 DOI: 10.1016/bs.aambs.2018.11.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The stress activated sigma factor sigma B (σB) plays a pivotal role in allowing the food-borne bacterial pathogen Listeria monocytogenes to modulate its transcriptional landscape in order to survive in a variety of harsh environments both outside and within the host. While we have a comparatively good understanding of the systems under the control of this sigma factor much less is known about how the activity of σB is controlled. In this review, we present a current model describing how this sigma factor is thought to be controlled including an overview of what is known about stress sensing and the early signal transduction events that trigger its activation. We discuss the known regulatory overlaps between σB and other protein and RNA regulators in the cell. Finally, we describe the role of σB in surviving both saprophytic and host-associated stresses. The complexity of the regulation of this sigma factor reflects the significant role that it plays in the persistence of this important pathogen in the natural environment, the food chain as well as within the host during the early stages of an infection. Understanding its regulation will be a critical step in helping to develop rational strategies to prevent its growth and survival in the food destined for human consumption and in the prevention of listeriosis.
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Jiang X, Yu T, Xu P, Xu X, Ji S, Gao W, Shi L. Role of Efflux Pumps in the in vitro Development of Ciprofloxacin Resistance in Listeria monocytogenes. Front Microbiol 2018; 9:2350. [PMID: 30319598 PMCID: PMC6170607 DOI: 10.3389/fmicb.2018.02350] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 09/12/2018] [Indexed: 12/19/2022] Open
Abstract
Efflux is a primary fluoroquinolone resistance mechanism in Listeria monocytogenes. In the present study, ciprofloxacin resistant strains were selected by exposure of sensitive strain to progressively increasing concentrations of ciprofloxacin and then the roles of efflux pumps Lde and MdrL in the development of resistance to ciprofloxacin were also investigated in L. monocytogenes. Ciprofloxacin sensitive strain of L. monocytogenes exhibited reduced susceptibility to this antibiotic after induction. Cross-resistance to ethidium bromide (EtBr) was observed in ciprofloxacin-induced strains. However, cross-resistance to benzalkonium chloride (BC) did not occur in this study. Compared to the wild-type strain HL06, the expression levels of lde were increased in four ciprofloxacin-induced strains. The single-gene deletion mutants of lde and mdrL from the ciprofloxacin-induced resistant strain HL06CIP4 were constructed. However, decreased minimum inhibitory concentration (MIC) of ciprofloxacin was observed only in HL06CIP4Δlde compared to that of the parental strain HL06CIP4. Ciprofloxacin uptake appeared to be obviously increased in HL06CIP4Δlde in relative to HL06CIP4. These evidences suggested that efflux pump Lde is involved in ciprofloxacin resistance in L. monocytogenes HL06CIP4. The deletion of lexA had no effect on the expression levels of lde in HL06CIP4 in the absence or presence of ciprofloxacin, indicating that LexA was not involved in the regulation of efflux pump Lde in L. monocytogenes.
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Affiliation(s)
- Xiaobing Jiang
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - Tao Yu
- College of Life Science and Technology, Xinxiang University, Xinxiang, China
| | - Ping Xu
- College of Life Science and Technology, Xinxiang University, Xinxiang, China
| | - Xiaobo Xu
- College of Life Science and Technology, Xinxiang University, Xinxiang, China
| | - Shengdong Ji
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - Wujun Gao
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - Lei Shi
- Institute of Food Safety and Nutrition, Jinan University, Guangzhou, China
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Marini E, Magi G, Ferretti G, Bacchetti T, Giuliani A, Pugnaloni A, Rippo MR, Facinelli B. Attenuation of Listeria monocytogenes Virulence by Cannabis sativa L. Essential Oil. Front Cell Infect Microbiol 2018; 8:293. [PMID: 30186775 PMCID: PMC6113369 DOI: 10.3389/fcimb.2018.00293] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 07/31/2018] [Indexed: 12/15/2022] Open
Abstract
Anti-virulence strategies are being explored as a novel approach to combat pathogens. Such strategies include inhibition of surface adhesion, tissue invasion, toxin production, and/or interference with the gene regulation of other virulence traits. Listeria monocytogenes, the causative agent of listeriosis, is a facultative intracellular food pathogen characterized by a wide distribution in the environment. Its ability to persist within biofilms and to develop resistance to sanitizers is the cause of significant problems in food processing plants and of steep costs for the food industry. In humans, the treatment of listeriosis is hampered by the intracellular location of listeriae and the poor intracellular penetration of some antibiotics. Eleven L. monocytogenes isolates from patients who were diagnosed with invasive listeriosis in Italy in 2014-2016 were studied. This in vitro and in vivo study explored the antibacterial and anti-virulence properties of a steam-distilled essential oil of Cannabis sativa L., which is being intensively investigated for its high content in powerful bioactive phytochemicals. Susceptibility experiments demonstrated a moderate bactericidal activity of the essential oil (Minimum Bactericidal Concentration > 2048 μg/mL). Assessment of the effects of sublethal concentrations of the essential oil on L. monocytogenes virulence traits demonstrated a significant action on motility. Listeriae were non-motile after exposure to the essential oil. Light and scanning electron microscopy documented aggregates of listeriae with the flagella trapped inside the cluster. Real-time RT-PCR experiments showed downregulation of flagellar motility genes and of the regulatory gene prfA. The ability to form biofilm and to invade Caco-2 cells was also significantly reduced. Galleria mellonella larvae infected with L. monocytogenes grown in presence of sublethal concentrations of the essential oil showed much higher survival rates compared with controls, suggesting that the extract inhibited tissue invasion. Food contamination with L. monocytogenes is a major concern for the food industry, particularly for plants making ready-to-eat and processed food. The present work provides a baseline in the study of the anti-virulence properties of the C. sativa essential oil against L. monocytogenes. Further studies are needed to understand if it could be used as an alternative agent for the control of L. monocytogenes in food processing plants.
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Affiliation(s)
- Emanuela Marini
- Unit of Microbiology, Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
| | - Gloria Magi
- Unit of Microbiology, Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
| | - Gianna Ferretti
- Department of Clinical Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Tiziana Bacchetti
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Angelica Giuliani
- Division of Pathology, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Armanda Pugnaloni
- Division of Pathology, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Maria Rita Rippo
- Division of Pathology, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Bruna Facinelli
- Unit of Microbiology, Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
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Wu S, Yu PL, Wheeler D, Flint S. Transcriptomic study on persistence and survival of Listeria monocytogenes following lethal treatment with nisin. J Glob Antimicrob Resist 2018; 15:25-31. [PMID: 29933119 DOI: 10.1016/j.jgar.2018.06.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 06/01/2018] [Accepted: 06/11/2018] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVES The aim of this study was to determine gene expression associated with the persistence of a Listeria monocytogenes stationary-phase population when facing lethal nisin treatment. METHODS RNA-Seq analysis was used for gene expression profiling of persister cells in nutrient-rich medium (persister TN) compared with untreated cells (non-persister). The results were confirmed using reverse transcription quantitative PCR (RT-qPCR). RESULTS Functional genes associated with the persister population were identified in multiple systems, such as heat-shock-related stress response, cell wall synthesis, ATP-binding cassette (ABC) transport system, phosphotransferase system (PTS) and SOS/DNA repair. CONCLUSIONS This study pointed to genetic regulation of persister cells exposed to lethal nisin concentrations and provides some insight into possible mechanisms of impeding bacterial persistence.
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Affiliation(s)
- Shuyan Wu
- Massey Institute of Food Science and Technology, Massey University, Riddet Road, 4442 Palmerston North, New Zealand
| | - Pak-Lam Yu
- School of Engineering & Advanced Technology, Massey University, Riddet Road, 4442 Palmerston North, New Zealand
| | - Dave Wheeler
- Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand
| | - Steve Flint
- Massey Institute of Food Science and Technology, Massey University, Riddet Road, 4442 Palmerston North, New Zealand.
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Wang Y, Feng H, Zhu Y, Gao P. Structural insights into glutathione-mediated activation of the master regulator PrfA in Listeria monocytogenes. Protein Cell 2018; 8:308-312. [PMID: 28271443 PMCID: PMC5359189 DOI: 10.1007/s13238-017-0390-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Affiliation(s)
- Yong Wang
- Key Laboratory of Infection and Immunity, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Han Feng
- Key Laboratory of Infection and Immunity, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yalan Zhu
- Key Laboratory of Infection and Immunity, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Pu Gao
- Key Laboratory of Infection and Immunity, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
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Phenotypic and Genotypic Analysis of Antimicrobial Resistance among Listeria monocytogenes Isolated from Australian Food Production Chains. Genes (Basel) 2018; 9:genes9020080. [PMID: 29425131 PMCID: PMC5852576 DOI: 10.3390/genes9020080] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 01/30/2018] [Accepted: 01/31/2018] [Indexed: 12/30/2022] Open
Abstract
The current global crisis of antimicrobial resistance (AMR) among important human bacterial pathogens has been amplified by an increased resistance prevalence. In recent years, a number of studies have reported higher resistance levels among Listeria monocytogenes isolates, which may have implications for treatment of listeriosis infection where resistance to key treatment antimicrobials is noted. This study examined the genotypic and phenotypic AMR patterns of 100 L. monocytogenes isolates originating from food production supplies in Australia and examined this in the context of global population trends. Low levels of resistance were noted to ciprofloxacin (2%) and erythromycin (1%); however, no resistance was observed to penicillin G or tetracycline. Resistance to ciprofloxacin was associated with a mutation in the fepR gene in one isolate; however, no genetic basis for resistance in the other isolate was identified. Resistance to erythromycin was correlated with the presence of the ermB resistance gene. Both resistant isolates belonged to clonal complex 1 (CC1), and analysis of these in the context of global CC1 isolates suggested that they were more similar to isolates from India rather than the other CC1 isolates included in this study. This study provides baseline AMR data for L. monocytogenes isolated in Australia, identifies key genetic markers underlying this resistance, and highlights the need for global molecular surveillance of resistance patterns to maintain control over the potential dissemination of AMR isolates.
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In vitro characterization of the antivirulence target of Gram-positive pathogens, peptidoglycan O-acetyltransferase A (OatA). PLoS Pathog 2017; 13:e1006667. [PMID: 29077761 PMCID: PMC5697884 DOI: 10.1371/journal.ppat.1006667] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 11/21/2017] [Accepted: 09/25/2017] [Indexed: 12/17/2022] Open
Abstract
The O-acetylation of the essential cell wall polymer peptidoglycan occurs in most Gram-positive bacterial pathogens, including species of Staphylococcus, Streptococcus and Enterococcus. This modification to peptidoglycan protects these pathogens from the lytic action of the lysozymes of innate immunity systems and, as such, is recognized as a virulence factor. The key enzyme involved, peptidoglycan O-acetyltransferase A (OatA) represents a particular challenge to biochemical study since it is a membrane associated protein whose substrate is the insoluble peptidoglycan cell wall polymer. OatA is predicted to be bimodular, being comprised of an N-terminal integral membrane domain linked to a C-terminal extracytoplasmic domain. We present herein the first biochemical and kinetic characterization of the C-terminal catalytic domain of OatA from two important human pathogens, Staphylococcus aureus and Streptococcus pneumoniae. Using both pseudosubstrates and novel biosynthetically-prepared peptidoglycan polymers, we characterized distinct substrate specificities for the two enzymes. In addition, the high resolution crystal structure of the C-terminal domain reveals an SGNH/GDSL-like hydrolase fold with a catalytic triad of amino acids but with a non-canonical oxyanion hole structure. Site-specific replacements confirmed the identity of the catalytic and oxyanion hole residues. A model is presented for the O-acetylation of peptidoglycan whereby the translocation of acetyl groups from a cytoplasmic source across the cytoplasmic membrane is catalyzed by the N-terminal domain of OatA for their transfer to peptidoglycan by its C-terminal domain. This study on the structure-function relationship of OatA provides a molecular and mechanistic understanding of this bacterial resistance mechanism opening the prospect for novel chemotherapeutic exploration to enhance innate immunity protection against Gram-positive pathogens. Multi-drug resistance amongst important human pathogens, such as methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant Enterococcus (VRE) and drug-resistant Streptococcus pneumoniae (DRSP), continues to challenge clinicians and threaten the lives of infected patients. Of the several approaches being taken to address this serious issue is the development of antagonists that render the bacterial infection more susceptible to the defensive enzymes and proteins of our innate immunity systems. One such target is the enzyme O-acetyltransferase A (OatA). This extracellular enzyme modifies the essential bacterial cell wall component peptidoglycan and thereby makes it resistant to the lytic action of lysozyme, our first line of defense against invading pathogens. In this study, we present the first biochemical and structural characterization of OatA. Using both the S. aureus and S. pneumoniae enzymes as model systems, we demonstrate that OatA has unique substrate specificities. We also show that the catalytic domain of OatA is a structural homolog of a well-studied superfamily of hydrolases. It uses a catalytic triad of Ser-His-Asp to transfer acetyl groups specifically to the C-6 hydroxyl group of muramoyl residues within peptidoglycan. This information on the structure and function relationship of OatA is important for the future development of effective inhibitors which may serve as antivirulence agents.
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Kandi V. Human Listeriosis Presenting as Breast Abscess: Report of a Rare Case. Cureus 2017; 9:e1006. [PMID: 28289572 PMCID: PMC5332169 DOI: 10.7759/cureus.1006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
An abscess is defined as a collection of pus in various tissues of the body including skin and other organs. Abscesses most commonly are formed on the skin under the armpits, groin areas, and rectal areas. Most abscesses involve microbial infections with few remaining sterile. The treatment of abscesses includes both medical and surgical intervention. In the era of multidrug resistance, isolation and identification of the causative microbe and testing for antimicrobial susceptible patterns assume greater significance for the better management of patients, thereby reducing the resultant morbidity and mortality. Listeria spp. are a group of aerobic and non-spore forming gram-positive bacilli. They are present in the environment, soil, and water. Listeria spp. have also been noted to be present as a normal intestinal flora of animals. They are known for their ability to thrive under both cold and hot environmental conditions. Human infections with Listeria spp. have not been frequently reported, mostly because of the difficulty in laboratory identification and complex clinical presentations. In humans, Listeria spp. have been frequently responsible for food poisoning and neonatal meningitis. Although not considered as a classic pathogen, Listeria spp. are associated with infections in elderly people, pregnant women, newborns, and persons with weakened immune systems. This report presents a case of breast abscess caused by Listeria spp. in a young lactating female belonging to rural India.
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Lebreton A, Stavru F, Brisse S, Cossart P. 1926-2016: 90 Years of listeriology. Microbes Infect 2016; 18:711-723. [PMID: 27876526 DOI: 10.1016/j.micinf.2016.10.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 10/26/2016] [Indexed: 01/28/2023]
Abstract
ISOPOL - for "International Symposium on Problems of Listeria and Listeriosis" - meetings gather every three years since 1957 participants from all over the world and allow exchange and update on a wide array of topics concerning Listeria and listeriosis, ranging from epidemiology, diagnostic and typing methods, to genomics, post-genomics, fundamental microbiology, cell biology and pathogenesis. The XIXth ISOPOL meeting took place in Paris from June 14th to 17th, 2016 at Institut Pasteur. We provide here a report of the talks that were given during the meeting, which represents an up-to-date overview of ongoing research on this important pathogen and biological model.
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Affiliation(s)
- Alice Lebreton
- École normale supérieure, PSL Research University, CNRS, Inserm, Institut de Biologie de l'École Normale Supérieure (IBENS), Équipe Infection et Devenir de l'ARN, 75005 Paris, France; INRA, IBENS, 75005 Paris, France
| | - Fabrizia Stavru
- Institut Pasteur, Unité des Interactions Bactéries-Cellules, 75015 Paris, France; Inserm, U604, 75015 Paris, France; INRA, USC2020, 75015 Paris, France; CNRS, SNC5101, Paris, France
| | - Sylvain Brisse
- Institut Pasteur, Molecular Prevention and Therapy of Human Diseases, 75724 Paris, France; Institut Pasteur, Microbial Evolutionary Genomics, 75724 Paris, France; CNRS, UMR 3525, Paris, France
| | - Pascale Cossart
- Institut Pasteur, Unité des Interactions Bactéries-Cellules, 75015 Paris, France; Inserm, U604, 75015 Paris, France; INRA, USC2020, 75015 Paris, France.
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Sapuan S, Kortsalioudaki C, Anthony M, Chang J, Embleton ND, Geethanath RM, Gray J, Greenough A, Lal MK, Luck S, Pattnayak S, Reynolds P, Russell AB, Scorrer T, Turner M, Heath PT, Vergnano S. Neonatal listeriosis in the UK 2004-2014. J Infect 2016; 74:236-242. [PMID: 27867063 DOI: 10.1016/j.jinf.2016.11.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 09/20/2016] [Accepted: 11/10/2016] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To define the clinical features and outcomes of neonatal listeriosis, and identify the maternal risk factors to seek scope for improvement. METHODS Neonatal listeriosis was identified prospectively from a United Kingdom neonatal infection surveillance network (neonIN) between 2004 and 2014. The participating neonatal units completed a study-specific proforma. RESULTS The incidence of neonatal listeriosis was 3.4 per 100,000 live births. Of the 21 cases identified, 19 were confirmed with a median gestational age of 33 weeks and a median birth weight of 1960 g. The majority had clinical features (95%, 18/19), presented within the first 24 h (95%, 18/19), and received penicillin empirically (94%, 18/19). The neonatal case-fatality rate was 21% (24% if probable cases were included). A proportion of mothers were investigated (60%, 12/18) and diagnosed with listeriosis (58%, 7/12); 32% (6/19) were treated with antibiotics but only 33% (6/12) included penicillin. DISCUSSION Despite its rarity and the prompt and appropriate use of antibiotics neonatal listeriosis has a high case-fatality rate. There is room for improvement in the adherence to the empiric antibiotic choice for puerperal sepsis, according to the national guidelines as this, would target listeriosis. Strategies should be in place to prevent pregnancy-associated listeriosis in higher risk population.
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Affiliation(s)
- Shari Sapuan
- Paediatric Infectious Diseases Research Group, St George's University of London, Jenner Wing, Level 2, Room 2.215E, Mail Point J2C, London, SW17 0RE, UK.
| | - Christina Kortsalioudaki
- Paediatric Infectious Diseases Research Group, St George's University of London, Jenner Wing, Level 2, Room 2.215E, Mail Point J2C, London, SW17 0RE, UK.
| | - Mark Anthony
- Children's Services, John Radcliffe Hospital, Oxford University Hospitals NHSFT, Newborn Care Unit, Headington, Oxford, OX3 9DU, UK.
| | - John Chang
- Croydon Health Services NHS Trust, St George's University of London, Croydon University Hospital, 530 London Rd, Croydon, Surrey, CR7 7YE, UK.
| | - Nicholas D Embleton
- Royal Victoria Infirmary, Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, NE1 4LP, UK.
| | - Ruppa M Geethanath
- City Hospital Sunderland NHSFT, Sunderland Royal Hospital, Kayll Road, Sunderland, SR4 7TP, UK.
| | - Jim Gray
- Birmingham Children's Hospital NHSFT, Birmingham Children's Hospital, Steelhouse Lane, Birmingham, B4 6NH, UK.
| | - Anne Greenough
- King's College London, King's Health Partners, Royal College of Paediatrics and Child Health, Neonatal Intensive Care Unit, King's College Hospital, 4th Floor Golden Jubilee Wing, Denmark Hill, SE5 9RS, UK.
| | - Mithilesh K Lal
- Department of Neonatal Medicine, The James Cook University Hospital, Marton Road, Middlesbrough, TS4 3BW, UK.
| | - Suzanne Luck
- Kingston Hospital NHS Trust, Galsworthy Rd, Kingston upon Thames, KT2 7QB, UK.
| | - Santosh Pattnayak
- Kent Neonatal Transport Service, Medway NHS Foundation Trust, Gillingham Kent, ME7 5NY, UK.
| | - Peter Reynolds
- Department of Paediatrics, St. Peter's Hospital, Ashford and St. Peter's Hospitals NHSFT, Royal Holloway University of London, Surrey & Sussex Neonatal ODN, Guildford Road, Surrey, KT16 0PZ, UK.
| | - Allison B Russell
- Birmingham Women's NHSFT, West Midlands Maternity and Children's Strategic Clinical Network, Mindelsohn Way, Birmingham, B15 2TG, UK.
| | - Timothy Scorrer
- Portsmouth Hospitals NHS Trust, Queen Alexandra Hospital, Portsmouth Hospitals NHS Trust, Southwick Hill Road, Portsmouth, PO6 3LY, UK.
| | - Mark Turner
- Women's and Children's Health, University of Liverpool, Liverpool Women's NHSFT, Institute of Translational Medicine, Crown St, Liverpool, L8 7SS, UK.
| | - Paul T Heath
- Paediatric Infectious Diseases Research Group, St George's University of London, Jenner Wing, Level 2, Room 2.215E, Mail Point J2C, London, SW17 0RE, UK.
| | - Stefania Vergnano
- Paediatric Infectious Diseases Research Group, St George's University of London, Jenner Wing, Level 2, Room 2.215E, Mail Point J2C, London, SW17 0RE, UK; Paediatric Infectious Diseases, Bristol Royal Hospital for Children, University of Bristol, Level 6, UH Bristol Education and Research Centre, Upper Maudlin Street, Bristol BS2 8AE, UK.
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Novais C, Tedim AP, Lanza VF, Freitas AR, Silveira E, Escada R, Roberts AP, Al-Haroni M, Baquero F, Peixe L, Coque TM. Co-diversification of Enterococcus faecium Core Genomes and PBP5: Evidences of pbp5 Horizontal Transfer. Front Microbiol 2016; 7:1581. [PMID: 27766095 PMCID: PMC5053079 DOI: 10.3389/fmicb.2016.01581] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 09/21/2016] [Indexed: 12/17/2022] Open
Abstract
Ampicillin resistance has greatly contributed to the recent dramatic increase of a cluster of human adapted Enterococcus faecium lineages (ST17, ST18, and ST78) in hospital-based infections. Changes in the chromosomal pbp5 gene have been associated with different levels of ampicillin susceptibility, leading to protein variants (designated as PBP5 C-types to keep the nomenclature used in previous works) with diverse degrees of reduction in penicillin affinity. Our goal was to use a comparative genomics approach to evaluate the relationship between the diversity of PBP5 among E. faecium isolates of different phylogenomic groups as well as to assess the pbp5 transferability among isolates of disparate clonal lineages. The analyses of 78 selected E. faecium strains as well as published E. faecium genomes, suggested that the diversity of pbp5 mirrors the phylogenomic diversification of E. faecium. The presence of identical PBP5 C-types as well as similar pbp5 genetic environments in different E. faecium lineages and clones from quite different geographical and environmental origin was also documented and would indicate their horizontal gene transfer among E. faecium populations. This was supported by experimental assays showing transfer of large (≈180–280 kb) chromosomal genetic platforms containing pbp5 alleles, ponA (transglycosilase) and other metabolic and adaptive features, from E. faecium donor isolates to suitable E. faecium recipient strains. Mutation profile analysis of PBP5 from available genomes and strains from this study suggests that the spread of PBP5 C-types might have occurred even in the absence of a significant ampicillin resistance phenotype. In summary, genetic platforms containing pbp5 sequences were stably maintained in particular E. faecium lineages, but were also able to be transferred among E. faecium clones of different origins, emphasizing the growing risk of further spread of ampicillin resistance in this nosocomial pathogen.
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Affiliation(s)
- Carla Novais
- UCIBIO/REQUIMTE, Laboratório de Microbiologia, Departamento de Ciências Biológicas, Faculdade Farmácia, Universidade do Porto Porto, Portugal
| | - Ana P Tedim
- Servicio de Microbiología, Instituto Ramón y Cajal de Investigación SanitariaMadrid, Spain; Consorcio de Investigación Biomédica en Red de Epidemiología y Salud PúblicaBarcelona, Spain
| | - Val F Lanza
- Servicio de Microbiología, Instituto Ramón y Cajal de Investigación SanitariaMadrid, Spain; Consorcio de Investigación Biomédica en Red de Epidemiología y Salud PúblicaBarcelona, Spain
| | - Ana R Freitas
- UCIBIO/REQUIMTE, Laboratório de Microbiologia, Departamento de Ciências Biológicas, Faculdade Farmácia, Universidade do PortoPorto, Portugal; Servicio de Microbiología, Instituto Ramón y Cajal de Investigación SanitariaMadrid, Spain
| | - Eduarda Silveira
- UCIBIO/REQUIMTE, Laboratório de Microbiologia, Departamento de Ciências Biológicas, Faculdade Farmácia, Universidade do Porto Porto, Portugal
| | - Ricardo Escada
- UCIBIO/REQUIMTE, Laboratório de Microbiologia, Departamento de Ciências Biológicas, Faculdade Farmácia, Universidade do PortoPorto, Portugal; Faculdade de Ciências da Saúde, Universidade Fernando PessoaPorto, Portugal
| | - Adam P Roberts
- Division of Microbial Diseases, UCL Eastman Dental Institute, University College London London, UK
| | - Mohammed Al-Haroni
- Division of Microbial Diseases, UCL Eastman Dental Institute, University College London London, UK
| | - Fernando Baquero
- Servicio de Microbiología, Instituto Ramón y Cajal de Investigación SanitariaMadrid, Spain; Consorcio de Investigación Biomédica en Red de Epidemiología y Salud PúblicaBarcelona, Spain; Unidad de Resistencia a Antibióticos y Virulencia Bacteriana (RYC-CSIC)Madrid, Spain
| | - Luísa Peixe
- UCIBIO/REQUIMTE, Laboratório de Microbiologia, Departamento de Ciências Biológicas, Faculdade Farmácia, Universidade do Porto Porto, Portugal
| | - Teresa M Coque
- Servicio de Microbiología, Instituto Ramón y Cajal de Investigación SanitariaMadrid, Spain; Consorcio de Investigación Biomédica en Red de Epidemiología y Salud PúblicaBarcelona, Spain; Unidad de Resistencia a Antibióticos y Virulencia Bacteriana (RYC-CSIC)Madrid, Spain
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Evaluation of the safety and efficacy of Listex™ P100 for reduction of pathogens on different ready‐to‐eat (RTE) food products. EFSA J 2016. [DOI: 10.2903/j.efsa.2016.4565] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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The analysis of the antibiotic resistome offers new opportunities for therapeutic intervention. Future Med Chem 2016; 8:1133-51. [DOI: 10.4155/fmc-2016-0027] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Most efforts in the development of antimicrobials have focused on the screening of lethal targets. Nevertheless, the constant expansion of antimicrobial resistance makes the antibiotic resistance determinants themselves suitable targets for finding inhibitors to be used in combination with antibiotics. Among them, inhibitors of antibiotic inactivating enzymes and of multidrug efflux pumps are suitable candidates for improving the efficacy of antibiotics. In addition, the application of systems biology tools is helping to understand the changes in bacterial physiology associated to the acquisition of resistance, including the increased susceptibility to other antibiotics displayed by some antibiotic-resistant mutants. This information is useful for implementing novel strategies based in metabolic interventions or combination of antibiotics for improving the efficacy of antibacterial therapy.
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