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J Barton A, Hill J, J Blohmke C, J Pollard A. Host restriction, pathogenesis and chronic carriage of typhoidal Salmonella. FEMS Microbiol Rev 2021; 45:6159486. [PMID: 33733659 PMCID: PMC8498562 DOI: 10.1093/femsre/fuab014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 03/03/2021] [Indexed: 12/16/2022] Open
Abstract
While conjugate vaccines against typhoid fever have recently been recommended by the World Health Organization for deployment, the lack of a vaccine against paratyphoid, multidrug resistance and chronic carriage all present challenges for the elimination of enteric fever. In the past decade, the development of in vitro and human challenge models has resulted in major advances in our understanding of enteric fever pathogenesis. In this review, we summarise these advances, outlining mechanisms of host restriction, intestinal invasion, interactions with innate immunity and chronic carriage, and discuss how this knowledge may progress future vaccines and antimicrobials.
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Affiliation(s)
- Amber J Barton
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford OX3 7LE, UK.,National Institute for Health Research (NIHR) Oxford Biomedical Research Centre, Oxford OX4 2PG, UK.,Department of Clinical Research, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
| | - Jennifer Hill
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford OX3 7LE, UK.,National Institute for Health Research (NIHR) Oxford Biomedical Research Centre, Oxford OX4 2PG, UK
| | - Christoph J Blohmke
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford OX3 7LE, UK.,National Institute for Health Research (NIHR) Oxford Biomedical Research Centre, Oxford OX4 2PG, UK
| | - Andrew J Pollard
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford OX3 7LE, UK.,National Institute for Health Research (NIHR) Oxford Biomedical Research Centre, Oxford OX4 2PG, UK
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Efficacy of a Salmonella enterica serovar Abortusovis (S. Abortusovis) inactivated vaccine in experimentally infected gestating ewes. Res Vet Sci 2020; 135:486-494. [PMID: 33268004 DOI: 10.1016/j.rvsc.2020.11.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 11/20/2020] [Accepted: 11/22/2020] [Indexed: 11/21/2022]
Abstract
Salmonella enterica serovar Abortusovis (S. Abortusovis) infection is one of the most important causes of infectious late-term abortion as well as birth of weak lambs in sheep in many countries throughout the world. Implementation of protocols based on the application of effective vaccines is one of the most effective approaches for controlling this disease, but variable efficacy has been reported, possibly related to factors associated with the host, the vaccine, the parameters used for determining efficacy and the challenge protocols. In this context, a new commercial inactivated vaccine (INMEVA; Laboratorios Hipra S.A., Spain) was evaluated in 20 control and 17 vaccinated gestating ewes, subcutaneously challenged at 90 days of gestation with 5 × 106 colony-forming units (cfu) of a wild strain of S. Abortusovis. Incidence of reproductive failures, bacterial vaginal excretion (by real time PCR), and lamb survival were evaluated as indicators of the vaccine's level of protection. Moreover, humoral response (by ELISA test in serum samples) was studied. Vaccination was showed to be safe under the study conditions. Vaccine efficacy was demonstrated in two different ways: i) it significantly decreased the percentage of abortions [29.4% (5/17) in the vaccinated group compared to the control group (65%; 13/20)] and ii) there was a significant reduction of the overall vaginal excretion in the sampling period (3.05 log cfu/mL ± 0.84 in the vaccinated group vs. 5.68 ± 0.67 in the control group). Given these results, the vaccine evaluated can be considered as an effective alternative for controlling S. Abortusovis infection in ovine flocks.
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3
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A general strategy to control antibody specificity against targets showing molecular and biological similarity: Salmonella case study. Sci Rep 2020; 10:18439. [PMID: 33116156 PMCID: PMC7595100 DOI: 10.1038/s41598-020-75285-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 10/12/2020] [Indexed: 11/10/2022] Open
Abstract
The control of antibody specificity plays pivotal roles in key technological fields such as diagnostics and therapeutics. During the development of immunoassays (IAs) for the biosensing of pathogens in food matrices, we have found a way to rationalize and control the specificity of polyclonal antibodies (sera) for a complex analytical target (the Salmonella genus), in terms of number of analytes (Salmonella species) and potential cross-reactivity with similar analytes (other bacteria strains). Indeed, the biosensing of Salmonella required the development of sera and serum mixtures displaying homogeneous specificity for a large set of strains showing broad biochemical variety (54 Salmonella serovars tested in this study), which partially overlaps with the molecular features of other class of bacteria (like specific serogroups of E. coli). To achieve a trade-off between specificity harmonisation and maximization, we have developed a strategy based on the conversion of the specificity profiles of individual sera in to numerical descriptors, which allow predicting the capacity of serum mixtures to detect multiple bacteria strains. This approach does not imply laborious purification steps and results advantageous for process scaling-up, and may help in the customization of the specificity profiles of antibodies needed for diagnostic and therapeutic applications such as multi-analyte detection and recombinant antibody engineering, respectively.
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Rojas L, Melgar-Rodríguez S, Díaz-Zúñiga J, Alvarez C, Monasterio G, Rojas C, Cafferata EA, Hernández M, Cortéz C, Carvajal P, Vernal R. Inhibitory effect of serotype a of Aggregatibacter actinomycetemcomitans on the increased destructive potential of serotype b. Oral Dis 2019; 26:409-418. [PMID: 31738464 DOI: 10.1111/odi.13237] [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: 08/14/2018] [Revised: 10/03/2019] [Accepted: 11/10/2019] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The serotype b of Aggregatibacter actinomycetemcomitans (A. actinomycetemcomitans) induces higher cytokine production in dendritic cells (DCs) compared with the other serotypes. However, this increased immunostimulatory potential was modified when DCs were co-infected with the other A. actinomycetemcomitans serotypes. This study aimed to analyze whether the production of interferon gamma (IFN-γ), C-reactive protein (CRP), matrix metalloproteinase (MMP)-2, and MMP-9, as well as the activity of osteoclasts, also varies when DCs are co-infected with the A. actinomycetemcomitans serotypes. MATERIALS AND METHODS Human DCs were stimulated with the A. actinomycetemcomitans serotypes using the following stimulatory conditions: serotype a/b/c/a+b/a+c/b+c/a+b+c. The IFN-γ, CRP, and MMP-2 levels were quantified by ELISA. The active form of MMP-9 was quantified using fluorescent functional assays. The MMP-2 gelatinolytic activity was identified by zymogram. The osteoclast activity was determined by quantifying the TRAP expression and resorption-pit formation using cytochemistry and osteoassays. RESULTS Higher levels of IFN-γ, CRP, MMP-2, MMP-9, and osteoclast activity were detected when DCs were stimulated with the serotype b of A. actinomycetemcomitans compared with the others. This increased immunostimulatory potential attributed to serotype b diminished when DCs were co-infected with the serotype a. CONCLUSIONS This study provides new insights into the virulence of A. actinomycetemcomitans and reveals important differences in the immunostimulatory and pro-destructive potential among its serotypes.
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Affiliation(s)
- Leticia Rojas
- Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | | | - Jaime Díaz-Zúñiga
- Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Carla Alvarez
- Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Gustavo Monasterio
- Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Carolina Rojas
- Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Emilio A Cafferata
- Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.,Department of Periodontology, School of Dentistry, Universidad Científica del Sur, Lima, Peru
| | - Marcela Hernández
- Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.,Dentistry Unit, Faculty of Health Sciences, Universidad Autónoma de Chile, Santiago, Chile
| | - Cristian Cortéz
- Center for Genomics and Bioinformatics, Faculty of Sciences, Universidad Mayor, Santiago, Chile
| | - Paola Carvajal
- Department of Conservative Dentistry, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Rolando Vernal
- Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.,Dentistry Unit, Faculty of Health Sciences, Universidad Autónoma de Chile, Santiago, Chile
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Serotype a of Aggregatibacter actinomycetemcomitans down-regulates the increased serotype b-induced cytokine and chemokine production in dendritic cells. Arch Oral Biol 2018; 93:155-162. [DOI: 10.1016/j.archoralbio.2018.06.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Revised: 06/04/2018] [Accepted: 06/09/2018] [Indexed: 12/15/2022]
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Li K, Xu H, Jiang W, Li J, Liu W, Wang T, Fang M. Development and characterization of stable reporter cells for fast and sensitive detection of pyrogen. Anal Biochem 2018; 557:69-76. [PMID: 30030993 DOI: 10.1016/j.ab.2018.07.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 06/18/2018] [Accepted: 07/17/2018] [Indexed: 12/20/2022]
Abstract
Pyrogens are a class of heterogeneous compounds that cause fever and induce inflammatory responses in the host. Lipopolysaccharides (LPS, also known as endotoxin) is the major pyrogen in the category of drug quality control. Accurate and fast quantification of pyrogens is crucial for drug safety. In the present study, we aimed to develop a sensitive and reliable method for rapid detection of pyrogens using luciferase reporter assay. Stable human A549 luciferase reporter cells were constructed under the control of a NF-κB-responsive element or IFN-β promoter. Our results showed that several monoclonal stable cell clones responded to 0.1 EU/ml endotoxin, which was less than human fever threshold at 0.3 EU/ml of endotoxin. Further, compared with original A549 cells, TLR4 expression on the reporter cells were significantly increased after low amount LPS stimulation. In addition, reporter cells also responded to zymosan stimulation. Therefore, these results indicated that the stable luciferase reporter cells respond to endotoxin and non-endotoxin pyrogens and have the potential to further develop into a sensitive and fast pyrogen evaluation method.
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Affiliation(s)
- Kaili Li
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, NO.1 Beichen West Road, Chaoyang District, Beijing, 100101, China; Institute of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
| | - Henan Xu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, NO.1 Beichen West Road, Chaoyang District, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100101, China
| | - Wei Jiang
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, NO.1 Beichen West Road, Chaoyang District, Beijing, 100101, China
| | - Jing Li
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, NO.1 Beichen West Road, Chaoyang District, Beijing, 100101, China
| | - Wenjun Liu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, NO.1 Beichen West Road, Chaoyang District, Beijing, 100101, China
| | - Tao Wang
- Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai, 200031, China.
| | - Min Fang
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, NO.1 Beichen West Road, Chaoyang District, Beijing, 100101, China; International College, University of Chinese Academy of Sciences, Beijing, 100101, China.
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7
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Chlebicz A, Śliżewska K. Campylobacteriosis, Salmonellosis, Yersiniosis, and Listeriosis as Zoonotic Foodborne Diseases: A Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:E863. [PMID: 29701663 PMCID: PMC5981902 DOI: 10.3390/ijerph15050863] [Citation(s) in RCA: 231] [Impact Index Per Article: 38.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 04/23/2018] [Accepted: 04/24/2018] [Indexed: 12/16/2022]
Abstract
Zoonoses are diseases transmitted from animals to humans, posing a great threat to the health and life of people all over the world. According to WHO estimations, 600 million cases of diseases caused by contaminated food were noted in 2010, including almost 350 million caused by pathogenic bacteria. Campylobacter, Salmonella, as well as Yersinia enterocolitica and Listeria monocytogenes may dwell in livestock (poultry, cattle, and swine) but are also found in wild animals, pets, fish, and rodents. Animals, often being asymptomatic carriers of pathogens, excrete them with faeces, thus delivering them to the environment. Therefore, pathogens may invade new individuals, as well as reside on vegetables and fruits. Pathogenic bacteria also penetrate food production areas and may remain there in the form of a biofilm covering the surfaces of machines and equipment. A common occurrence of microbes in food products, as well as their improper or careless processing, leads to common poisonings. Symptoms of foodborne infections may be mild, sometimes flu-like, but they also may be accompanied by severe complications, some even fatal. The aim of the paper is to summarize and provide information on campylobacteriosis, salmonellosis, yersiniosis, and listeriosis and the aetiological factors of those diseases, along with the general characteristics of pathogens, virulence factors, and reservoirs.
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Affiliation(s)
- Agnieszka Chlebicz
- Institute of Fermentation Technology and Microbiology, Department of Biotechnology and Food Sciences, Lodz University of Technology, Wólczańska 171/173, 90-924 Łódź, Poland.
| | - Katarzyna Śliżewska
- Institute of Fermentation Technology and Microbiology, Department of Biotechnology and Food Sciences, Lodz University of Technology, Wólczańska 171/173, 90-924 Łódź, Poland.
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Lin YS, Zhou H, Forrest R, Frampton C, Burrows L, Hickford J. Association between variation in faecal egg count for a natural mixed field-challenge of nematode parasites and TLR4 variation. Vet Parasitol 2016; 218:5-9. [DOI: 10.1016/j.vetpar.2016.01.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 11/30/2015] [Accepted: 01/04/2016] [Indexed: 02/01/2023]
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9
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Pirianov G, MacIntyre DA, Lee Y, Waddington SN, Terzidou V, Mehmet H, Bennett PR. Specific inhibition of c-Jun N-terminal kinase delays preterm labour and reduces mortality. Reproduction 2015; 150:269-77. [PMID: 26183892 PMCID: PMC4982111 DOI: 10.1530/rep-15-0258] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 07/16/2015] [Indexed: 11/08/2022]
Abstract
Preterm labour (PTL) is commonly associated with infection and/or inflammation. Lipopolysaccharide (LPS) from different bacteria can be used to independently or mutually activate Jun N-terminal kinase (JNK)/AP1- or NF-κB-driven inflammatory pathways that lead to PTL. Previous studies using Salmonella abortus LPS, which activates both JNK/AP-1 and NF-κB, showed that selective inhibition of NF-κB delays labour and improves pup outcome. Where labour is induced using Escherichia coli LPS (O111), which upregulates JNK/AP-1 but not NF-κB, inhibition of JNK/AP-1 activation also delays labour. In this study, to determine the potential role of JNK as a therapeutic target in PTL, we investigated the specific contribution of JNK signalling to S. Abortus LPS-induced PTL in mice. Intrauterine administration of S. Abortus LPS to pregnant mice resulted in the activation of JNK in the maternal uterus and fetal brain, upregulation of pro-inflammatory proteins COX-2, CXCL1, and CCL2, phosphorylation of cPLA2 in myometrium, and induction of PTL. Specific inhibition of JNK by co-administration of specific D-JNK inhibitory peptide (D-JNKI) delayed LPS-induced preterm delivery and reduced fetal mortality. This is associated with inhibition of myometrial cPLA2 phosphorylation and proinflammatory proteins synthesis. In addition, we report that D-JNKI inhibits the activation of JNK/JNK3 and caspase-3, which are important mediators of neural cell death in the neonatal brain. Our data demonstrate that specific inhibition of TLR4-activated JNK signalling pathways has potential as a therapeutic approach in the management of infection/inflammation-associated PTL and prevention of the associated detrimental effects to the neonatal brain.
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Affiliation(s)
- Grisha Pirianov
- Imperial College Parturition Research GroupDepartment of Reproductive Biology, Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Campus, Du Cane Road, London W12 0NN, UKGene Transfer Technology GroupInstitute for Women's Health, University College London, 86-96 Chenies Mews, London WC1E 6HX, UKProteostasis Therapeutics 200 Technology SquareSuite 402, Cambridge, Massachusetts 02139, USADepartment of Biomedical and Forensic SciencesAnglia Ruskin University, East Road, Cambridge CB1 1PT, UK
| | - David A MacIntyre
- Imperial College Parturition Research GroupDepartment of Reproductive Biology, Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Campus, Du Cane Road, London W12 0NN, UKGene Transfer Technology GroupInstitute for Women's Health, University College London, 86-96 Chenies Mews, London WC1E 6HX, UKProteostasis Therapeutics 200 Technology SquareSuite 402, Cambridge, Massachusetts 02139, USADepartment of Biomedical and Forensic SciencesAnglia Ruskin University, East Road, Cambridge CB1 1PT, UK
| | - Yun Lee
- Imperial College Parturition Research GroupDepartment of Reproductive Biology, Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Campus, Du Cane Road, London W12 0NN, UKGene Transfer Technology GroupInstitute for Women's Health, University College London, 86-96 Chenies Mews, London WC1E 6HX, UKProteostasis Therapeutics 200 Technology SquareSuite 402, Cambridge, Massachusetts 02139, USADepartment of Biomedical and Forensic SciencesAnglia Ruskin University, East Road, Cambridge CB1 1PT, UK
| | - Simon N Waddington
- Imperial College Parturition Research GroupDepartment of Reproductive Biology, Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Campus, Du Cane Road, London W12 0NN, UKGene Transfer Technology GroupInstitute for Women's Health, University College London, 86-96 Chenies Mews, London WC1E 6HX, UKProteostasis Therapeutics 200 Technology SquareSuite 402, Cambridge, Massachusetts 02139, USADepartment of Biomedical and Forensic SciencesAnglia Ruskin University, East Road, Cambridge CB1 1PT, UK
| | - Vasso Terzidou
- Imperial College Parturition Research GroupDepartment of Reproductive Biology, Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Campus, Du Cane Road, London W12 0NN, UKGene Transfer Technology GroupInstitute for Women's Health, University College London, 86-96 Chenies Mews, London WC1E 6HX, UKProteostasis Therapeutics 200 Technology SquareSuite 402, Cambridge, Massachusetts 02139, USADepartment of Biomedical and Forensic SciencesAnglia Ruskin University, East Road, Cambridge CB1 1PT, UK
| | - Huseyin Mehmet
- Imperial College Parturition Research GroupDepartment of Reproductive Biology, Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Campus, Du Cane Road, London W12 0NN, UKGene Transfer Technology GroupInstitute for Women's Health, University College London, 86-96 Chenies Mews, London WC1E 6HX, UKProteostasis Therapeutics 200 Technology SquareSuite 402, Cambridge, Massachusetts 02139, USADepartment of Biomedical and Forensic SciencesAnglia Ruskin University, East Road, Cambridge CB1 1PT, UK
| | - Phillip R Bennett
- Imperial College Parturition Research GroupDepartment of Reproductive Biology, Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Campus, Du Cane Road, London W12 0NN, UKGene Transfer Technology GroupInstitute for Women's Health, University College London, 86-96 Chenies Mews, London WC1E 6HX, UKProteostasis Therapeutics 200 Technology SquareSuite 402, Cambridge, Massachusetts 02139, USADepartment of Biomedical and Forensic SciencesAnglia Ruskin University, East Road, Cambridge CB1 1PT, UK
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Rivera-Chávez F, Bäumler AJ. The Pyromaniac Inside You: Salmonella Metabolism in the Host Gut. Annu Rev Microbiol 2015; 69:31-48. [PMID: 26002180 DOI: 10.1146/annurev-micro-091014-104108] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A metabolically diverse microbial community occupies all available nutrient-niches in the lumen of the mammalian intestine, making it difficult for pathogens to establish themselves in this highly competitive environment. Salmonella serovars sidestep the competition by using their virulence factors to coerce the host into creating a novel nutrient-niche. Inflammation-derived nutrients available in this new niche support a bloom of Salmonella serovars, thereby ensuring transmission of the pathogen to the next susceptible host by the fecal-oral route. Here we review the anaerobic food chain that characterizes resident gut-associated microbial communities along with the winning metabolic strategy Salmonella serovars use to edge out competing microbes in the inflamed intestine.
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Affiliation(s)
- Fabian Rivera-Chávez
- Department of Medical Microbiology and Immunology, School of Medicine, University of California, Davis, California 95616;
| | - Andreas J Bäumler
- Department of Medical Microbiology and Immunology, School of Medicine, University of California, Davis, California 95616;
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