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Xiong D, Song L, Chen Y, Jiao X, Pan Z. Salmonella Enteritidis activates inflammatory storm via SPI-1 and SPI-2 to promote intracellular proliferation and bacterial virulence. Front Cell Infect Microbiol 2023; 13:1158888. [PMID: 37325511 PMCID: PMC10266283 DOI: 10.3389/fcimb.2023.1158888] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 05/18/2023] [Indexed: 06/17/2023] Open
Abstract
Salmonella Enteritidis is an important intracellular pathogen, which can cause gastroenteritis in humans and animals and threaten life and health. S. Enteritidis proliferates in host macrophages to establish systemic infection. In this study, we evaluated the effects of Salmonella pathogenicity island-1 (SPI-1) and SPI-2 to S. Enteritidis virulence in vitro and in vivo, as well as the host inflammatory pathways affected by SPI-1 and SPI-2. Our results show that S. Enteritidis SPI-1 and SPI-2 contributed to bacterial invasion and proliferation in RAW264.7 macrophages, and induced cytotoxicity and cellular apoptosis of these cells. S. Enteritidis infection induced multiple inflammatory responses, including mitogen-activated protein kinase (ERK-mediated) and Janus kinase-signal transducer and activator of transcript (STAT) (STAT2-mediated) pathways. Both SPI-1 and SPI-2 were necessary to induce robust inflammatory responses and ERK/STAT2 phosphorylation in macrophages. In a mouse infection model, both SPIs, especially SPI-2, resulted in significant production of inflammatory cytokines and various interferon-stimulated genes in the liver and spleen. Activation of the ERK- and STAT2-mediated cytokine storm was largely affected by SPI-2. S. Enteritidis ΔSPI-1-infected mice displayed moderate histopathological damage and drastically reduced bacterial loads in tissues, whereas only slight damage and no bacteria were observed in ΔSPI-2- and ΔSPI-1/SPI-2-infected mice. A survival assay showed that ΔSPI-1 mutant mice maintained a medium level of virulence, while SPI-2 plays a decisive role in bacterial virulence. Collectively, our findings indicate that both SPIs, especially SPI-2, profoundly contributed to S. Enteritidis intracellular localization and virulence by activating multiple inflammatory pathways.
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Affiliation(s)
- Dan Xiong
- Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
- Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou, China
| | - Li Song
- Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
- Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou, China
| | - Yushan Chen
- Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
- Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou, China
| | - Xinan Jiao
- Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
- Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou, China
| | - Zhiming Pan
- Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
- Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou, China
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Shikov AE, Belousova ME, Belousov MV, Nizhnikov AA, Antonets KS. Salmonella-Based Biorodenticides: Past Applications and Current Contradictions. Int J Mol Sci 2022; 23:ijms232314595. [PMID: 36498920 PMCID: PMC9736839 DOI: 10.3390/ijms232314595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/03/2022] [Accepted: 11/14/2022] [Indexed: 11/24/2022] Open
Abstract
The idea of using pathogens to control pests has existed since the end of the 19th century. Enterobacteria from the genus Salmonella, discovered at that time, are the causative agents of many serious diseases in mammals often leading to death. Mostly, the strains of Salmonella are able to infect a wide spectrum of hosts belonging to vertebrates, but some of them show host restriction. Several strains of these bacteria have been used as biorodenticides due to the host restriction until they were banned in many countries in the second part of the 20th century. The main reason for the ban was their potential pathogenicity for some domestic animals and poultry and the outbreaks of gastroenteritis in humans. Since that time, a lot of data regarding the host specificity and host restriction of different strains of Salmonella have been accumulated, and the complexity of the molecular mechanisms affecting it has been uncovered. In this review, we summarize the data regarding the history of studying and application of Salmonella-based rodenticides, discuss molecular systems controlling the specificity of Salmonella interactions within its multicellular hosts at different stages of infection, and attempt to reconstruct the network of genes and their allelic variants which might affect the host-restriction mechanisms.
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Affiliation(s)
- Anton E. Shikov
- Laboratory for Proteomics of Supra-Organismal Systems, All-Russia Research Institute for Agricultural Microbiology (ARRIAM), Pushkin, St. Petersburg 196608, Russia
- Faculty of Biology, St. Petersburg State University, St. Petersburg 199034, Russia
| | - Maria E. Belousova
- Laboratory for Proteomics of Supra-Organismal Systems, All-Russia Research Institute for Agricultural Microbiology (ARRIAM), Pushkin, St. Petersburg 196608, Russia
| | - Mikhail V. Belousov
- Laboratory for Proteomics of Supra-Organismal Systems, All-Russia Research Institute for Agricultural Microbiology (ARRIAM), Pushkin, St. Petersburg 196608, Russia
- Faculty of Biology, St. Petersburg State University, St. Petersburg 199034, Russia
| | - Anton A. Nizhnikov
- Laboratory for Proteomics of Supra-Organismal Systems, All-Russia Research Institute for Agricultural Microbiology (ARRIAM), Pushkin, St. Petersburg 196608, Russia
- Faculty of Biology, St. Petersburg State University, St. Petersburg 199034, Russia
| | - Kirill S. Antonets
- Laboratory for Proteomics of Supra-Organismal Systems, All-Russia Research Institute for Agricultural Microbiology (ARRIAM), Pushkin, St. Petersburg 196608, Russia
- Faculty of Biology, St. Petersburg State University, St. Petersburg 199034, Russia
- Correspondence:
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Jung B, Park S, Kim E, Yoon H, Hahn TW. Salmonella Typhimurium lacking phoBR as a live vaccine candidate against poultry infection. Vet Microbiol 2022; 266:109342. [PMID: 35063827 DOI: 10.1016/j.vetmic.2022.109342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 01/11/2022] [Accepted: 01/13/2022] [Indexed: 10/19/2022]
Abstract
Salmonella enterica serovar Typhimurium, with a broad-host range, is a predominant cause of non-typhoidal Salmonella infection in humans, and the infectious source is highly associated with food animals, especially poultry. Considering the horizontal transmission of S. Typhimurium from farm animals to humans, vaccination has been strongly recommended in industrial animals. In an effort to eradicate S. Typhimurium in poultry farms, a live candidate vaccine strain lacking the phoBR genes, which encode the PhoB/PhoR two-component regulatory system responsible for cellular phosphate signaling, was evaluated in mice and chickens. Lack of the phoBR genes promoted overgrowth of intracellular Salmonella. However, notably, in BALB/c mouse models, the ΔphoBR mutant showed attenuated virulence and instead, provided protection against infection with virulent Salmonella, thereby clearing out Salmonella in the spleen and liver. Accordingly, immunization with the ΔphoBR mutant increased immunoglobulin (Ig)G and IgM antibody responses and also tended to increase the IgG2a/IgG1 ratio, which is indicative of T helper (Th)1-mediated cellular immunity. In chicken challenge models, immunization with the ΔphoBR mutant significantly boosted the production of IgG and IgM antibodies after the second vaccination. The vaccinated chickens ceased fecal shedding of challenged Salmonella earlier than the non-vaccinated ones and showed no Salmonella in their caecum and ileum. These results demonstrate the potential of the S. Typhimurium ΔphoBR mutant as a vaccine in chickens.
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Affiliation(s)
- Bogyo Jung
- Department of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon, 24341, South Korea
| | - Soyeon Park
- Department of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon, 24341, South Korea
| | - Eunsuk Kim
- Department of Molecular Science and Technology, Ajou University, Suwon, 16499, South Korea
| | - Hyunjin Yoon
- Department of Molecular Science and Technology, Ajou University, Suwon, 16499, South Korea.
| | - Tae-Wook Hahn
- Department of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon, 24341, South Korea.
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Wu X, Ning C, Key FM, Andrades Valtueña A, Lankapalli AK, Gao S, Yang X, Zhang F, Liu L, Nie Z, Ma J, Krause J, Herbig A, Cui Y. A 3,000-year-old, basal S. enterica lineage from Bronze Age Xinjiang suggests spread along the Proto-Silk Road. PLoS Pathog 2021; 17:e1009886. [PMID: 34547027 PMCID: PMC8486138 DOI: 10.1371/journal.ppat.1009886] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 10/01/2021] [Accepted: 08/11/2021] [Indexed: 01/03/2023] Open
Abstract
Salmonella enterica (S. enterica) has infected humans for a long time, but its evolutionary history and geographic spread across Eurasia is still poorly understood. Here, we screened for pathogen DNA in 14 ancient individuals from the Bronze Age Quanergou cemetery (XBQ), Xinjiang, China. In 6 individuals we detected S. enterica. We reconstructed S. enterica genomes from those individuals, which form a previously undetected phylogenetic branch basal to Paratyphi C, Typhisuis and Choleraesuis-the so-called Para C lineage. Based on pseudogene frequency, our analysis suggests that the ancient S. enterica strains were not host adapted. One genome, however, harbors the Salmonella pathogenicity island 7 (SPI-7), which is thought to be involved in (para)typhoid disease in humans. This offers first evidence that SPI-7 was acquired prior to the emergence of human-adapted Paratyphi C around 1,000 years ago. Altogether, our results show that Salmonella enterica infected humans in Eastern Eurasia at least 3,000 years ago, and provide the first ancient DNA evidence for the spread of a pathogen along the Proto-Silk Road.
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Affiliation(s)
- Xiyan Wu
- School of Life Sciences, Jilin University, Changchun, China
- School of History and Culture, Henan University, Kaifeng, China
| | - Chao Ning
- Max Planck Institute for the Science of Human History, Jena, Germany
| | - Felix M. Key
- Max Planck Institute for the Science of Human History, Jena, Germany
- Max Planck Institute for Infection Biology, Berlin, Germany
| | - Aida Andrades Valtueña
- Max Planck Institute for the Science of Human History, Jena, Germany
- Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | | | - Shizhu Gao
- College of Pharmacia Sciences, Jilin University, Changchun, China
| | - Xuan Yang
- School of Life Sciences, Jilin University, Changchun, China
| | - Fan Zhang
- School of Life Sciences, Jilin University, Changchun, China
| | - Linlin Liu
- Department of Radiation Oncology, The Second Hospital of Jilin University, Changchun, China
| | - Zhongzhi Nie
- Research Center for Chinese Frontier Archaeology, Jilin University, Changchun, China
| | - Jian Ma
- School of Cultural Heritage, Northwest University, Xi’an, China
| | - Johannes Krause
- Max Planck Institute for the Science of Human History, Jena, Germany
- Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Alexander Herbig
- Max Planck Institute for the Science of Human History, Jena, Germany
- Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Yinqiu Cui
- School of Life Sciences, Jilin University, Changchun, China
- Research Center for Chinese Frontier Archaeology, Jilin University, Changchun, China
- Key Laboratory for Evolution of Past Life and Environment in Northeast Asia (Jilin University), Ministry of Education, Changchun, China
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5
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Comparative efficacy of spray-dried plasma and bacitracin methylene disalicylate in reducing cecal colonization by Salmonella Enteritidis in broiler chickens. Poult Sci 2021; 100:101134. [PMID: 34089939 PMCID: PMC8182271 DOI: 10.1016/j.psj.2021.101134] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 02/28/2021] [Accepted: 03/04/2021] [Indexed: 12/19/2022] Open
Abstract
Spray-dried plasma (SDP) contains immunoglobulins and glycoproteins that possess antibacterial properties. Two floor-pen trials were conducted to determine the efficacy of dietary SDP and bacitracin methylene disalicylate (BMD) antibiotic in reducing intestinal colonization by Salmonella Enteritidis (SE) in broiler chickens. Experiment 1 was a 2-wk, 3 × 2 factorial design consisting of 6 treatments. Treatment CON consisted of chicks fed unmedicated corn-soybean meal (SBM) basal without SDP. Treatment BMD consisted of chicks given unmedicated corn-SBM basal into which BMD was added at 0.055g/kg diet. Treatment SDP consisted of chicks given unmedicated corn-SBM basal into which SDP was added at 30g/kg diet. Treatments CON-SE, BMD-SE, and SDP-SE consisted of chicks that were given diets similar to CON, BMD, and SDP, respectively, and were each inoculated with 7.46 × 108 CFU SE /mL at 1 day of age. Experiment 2 was a 42-day trial that was similar to Experiment 1 in design, except that chicks were placed on fresh clean litter. On d 3, 7, 14, and 28 post-challenge (PC), ceca SE concentration was enumerated on xylose lysine tergitol-4 (XLT4) agar. Body weight gain (BWG) and feed conversion ratio (FCR) were also recorded. Results for d 3 showed that BMD- and SDP-fed chicks had similar (P > 0.05) cecal SE (3.39 log 10 CFU / g and 3.58 log 10 CFU / g, respectively), but these levels were lower (P < 0.05) than that of CON-fed chicks (5.68 log 10 CFU / g). A similar trend was observed on d 7 and 14 PC. The BMD- and SDP-fed chicks also had higher BWG and FCR (P < 0.05) when compared with CON-fed chicks up to d 14. Thereafter, only BMD treatment sustained this growth-promoting effect till d 42 in SE-challenged birds. In conclusion, BMD and SDP showed similar efficacy in reducing cecal Salmonella and in mitigating consequent growth-depressing effect(s) in broiler chicks up to 2 wk of age.
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Hudson LK, Constantine-Renna L, Thomas L, Moore C, Qian X, Garman K, Dunn JR, Denes TG. Genomic characterization and phylogenetic analysis of Salmonella enterica serovar Javiana. PeerJ 2020; 8:e10256. [PMID: 33240617 PMCID: PMC7682435 DOI: 10.7717/peerj.10256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 10/06/2020] [Indexed: 02/01/2023] Open
Abstract
Salmonella enterica serovar Javiana is the fourth most reported serovar of laboratory-confirmed human Salmonella infections in the U.S. and in Tennessee (TN). Although Salmonella ser. Javiana is a common cause of human infection, the majority of cases are sporadic in nature rather than outbreak-associated. To better understand Salmonella ser. Javiana microbial population structure in TN, we completed a phylogenetic analysis of 111 Salmonella ser. Javiana clinical isolates from TN collected from Jan. 2017 to Oct. 2018. We identified mobile genetic elements and genes known to confer antibiotic resistance present in the isolates, and performed a pan-genome-wide association study (pan-GWAS) to compare gene content between clades identified in this study. The population structure of TN Salmonella ser. Javiana clinical isolates consisted of three genetic clades: TN clade I (n = 54), TN clade II (n = 4), and TN clade III (n = 48). Using a 5, 10, and 25 hqSNP distance threshold for cluster identification, nine, 12, and 10 potential epidemiologically-relevant clusters were identified, respectively. The majority of genes that were found to be over-represented in specific clades were located in mobile genetic element (MGE) regions, including genes encoding integrases and phage structures (91.5%). Additionally, a large portion of the over-represented genes from TN clade II (44.9%) were located on an 87.5 kb plasmid containing genes encoding a toxin/antitoxin system (ccdAB). Additionally, we completed phylogenetic analyses of global Salmonella ser. Javiana datasets to gain a broader insight into the population structure of this serovar. We found that the global phylogeny consisted of three major clades (one of which all of the TN isolates belonged to) and two cgMLST eBurstGroups (ceBGs) and that the branch length between the two Salmonella ser. Javiana ceBGs (1,423 allelic differences) was comparable to those from other serovars that have been reported as polyphyletic (929–2,850 allelic differences). This study demonstrates the population structure of TN and global Salmonella ser. Javiana isolates, a clinically important Salmonella serovar and can provide guidance for phylogenetic cluster analyses for public health surveillance and response.
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Affiliation(s)
- Lauren K Hudson
- Department of Food Science, University of Tennessee, Knoxville, TN, United States of America
| | | | - Linda Thomas
- Division of Laboratory Services, Tennessee Department of Health, Nashville, TN, United States of America
| | - Christina Moore
- Division of Laboratory Services, Tennessee Department of Health, Nashville, TN, United States of America
| | - Xiaorong Qian
- Division of Laboratory Services, Tennessee Department of Health, Nashville, TN, United States of America
| | - Katie Garman
- Tennessee Department of Health, Nashville, TN, United States of America
| | - John R Dunn
- Tennessee Department of Health, Nashville, TN, United States of America
| | - Thomas G Denes
- Department of Food Science, University of Tennessee, Knoxville, TN, United States of America
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The Salmonella LysR Family Regulator RipR Activates the SPI-13-Encoded Itaconate Degradation Cluster. Infect Immun 2020; 88:IAI.00303-20. [PMID: 32719152 DOI: 10.1128/iai.00303-20] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Accepted: 07/21/2020] [Indexed: 11/20/2022] Open
Abstract
Itaconate is a dicarboxylic acid that inhibits the isocitrate lyase enzyme of the bacterial glyoxylate shunt. Activated macrophages have been shown to produce itaconate, suggesting that these immune cells may employ this metabolite as a weapon against invading bacteria. Here, we demonstrate that in vitro, itaconate can exhibit bactericidal effects under acidic conditions similar to the pH of a macrophage phagosome. In parallel, successful pathogens, including Salmonella, have acquired a genetic operon encoding itaconate degradation proteins, which are induced heavily in macrophages. We characterized the regulation of this operon by the neighboring gene ripR in specific response to itaconate. Moreover, we developed an itaconate biosensor based on the operon promoter that can detect itaconate in a semiquantitative manner and, when combined with the ripR gene, is sufficient for itaconate-regulated expression in Escherichia coli Using this biosensor with fluorescence microscopy, we observed bacteria responding to itaconate in the phagosomes of macrophages and provide additional evidence that gamma interferon stimulates macrophage itaconate synthesis and that J774 mouse macrophages produce substantially more itaconate than the human THP-1 monocyte cell line. In summary, we examined the role of itaconate as an antibacterial metabolite in mouse and human macrophages, characterized the regulation of Salmonella's defense against it, and developed it as a convenient itaconate biosensor and inducible promoter system.
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8
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Mansour MN, Yaghi J, El Khoury A, Felten A, Mistou MY, Atoui A, Radomski N. Prediction of Salmonella serovars isolated from clinical and food matrices in Lebanon and genomic-based investigation focusing on Enteritidis serovar. Int J Food Microbiol 2020; 333:108831. [PMID: 32854018 DOI: 10.1016/j.ijfoodmicro.2020.108831] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/09/2020] [Accepted: 08/10/2020] [Indexed: 12/17/2022]
Abstract
Salmonella enterica subsp. enterica serovars are considered major causes of food poisoning and we performed this study because Salmonella is a burden in Lebanon. The present study investigated the ability of genomic information to predict serovar using a collection of Salmonella isolates from infected humans (n = 24) and contaminated food (n = 63) in Lebanon. Further, the phylogenomic relationships of the serovar the predominated in Lebanon (i.e., S. Enteritidis; n = 25) were investigated in comparison with isolates from other countries (n = 130) based on coregenome single nucleotide polymorphisms (SNPs). Genetic elements, specifically Salmonella pathogenicity islands (SPIs), plasmid replicons, and antibiotic-resistance genes were screened in S. Enteritidis genomes (n = 155). Our results revealed that the Salmonella serovars identification by seroagglutination from the samples isolated in Lebanon (n = 87) was highly correlated with the genomic-based prediction of serovars (80.4-85.0% with SeqSero1 and 93.1-94.2% with SeqSero2). The Salmonella serovars isolated from human and food samples in Lebanon were mainly Enteritidis (28.7%) and Infantis (26%). To a rare extent, other serovars included Amager, Anatum, Bredeney, Chincol, Heidelberg, Hofit, Kentucky, Montevideo, Muenster, Newport, Schwarzengrund, Senftenberg and Typhimurium. In comparison with other countries, S. Enteritidis samples isolated in Lebanon (56 ± 27 intra-group pairwise SNP differences) presented a strong phylogenomic relativeness at the coregenome level with samples, as for example with samples isolated from Syria (65 ± 31 inter-group pairwise SNP differences). Most of the studied S. Enteritidis genomes encoded 10 SPIs involved in survival in immune cells (i.e. SPIs 1, 2, 3, 4, 5, 12, 13, 14, 16 and 17). The plasmid replicons IncFIB (S)_1 and IncFII (S)_1 encoding elements involved in virulence were identified in the majority of the S. Enteritidis genomes (94% and 96%, respectively), the majority exhibiting aminoglycosides (gene aac(6')-Iaa_1). The IncI_1_Alpha replicon responsible for ampicillin-resistance was only detected in 2 of 25 S. Enteritidis Lebanese strains. Genomic-based risk assessment of Salmonella serovars in Lebanon showed that food imported from Syria might be an origin of the S. Enteritidis human cases in Lebanon. The detection of several SPIs involved in the survival, plasmid replicons involved in virulence, and aminoglycoside-resistance genes, emphasizes that S. Enteritidis is of paramount importance for public health in Lebanon and other countries.
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Affiliation(s)
- Marie Noel Mansour
- Centre d'Analyses et de Recherche (CAR), Unité de Recherche « Technologies et Valorisation Agro-alimentaire » (UR-TVA), Faculty of Sciences, Saint-Joseph University of Beirut, Campus of Sciences and Technologies, Mar Roukos, Lebanon.
| | - Joseph Yaghi
- Centre d'Analyses et de Recherche (CAR), Unité de Recherche « Technologies et Valorisation Agro-alimentaire » (UR-TVA), Faculty of Sciences, Saint-Joseph University of Beirut, Campus of Sciences and Technologies, Mar Roukos, Lebanon.
| | - André El Khoury
- Centre d'Analyses et de Recherche (CAR), Unité de Recherche « Technologies et Valorisation Agro-alimentaire » (UR-TVA), Faculty of Sciences, Saint-Joseph University of Beirut, Campus of Sciences and Technologies, Mar Roukos, Lebanon.
| | - Arnaud Felten
- Paris-Est University, French Agency for Food, Environmental and Occupational Health and Safety (Anses), Laboratory for Food Safety (LSAL), Maisons-Alfort, France.
| | - Michel-Yves Mistou
- Applied Mathematics and Computer Science, From Genomes to the Environment (MaIAGE), National Institute for Agricultural, Food and Environmental Research (INRAE), Université Paris-Saclay, Jouy-en-Josas, France.
| | - Ali Atoui
- Laboratory of Microbiology, Department of Life and Earth Sciences, Faculty of Sciences I, Lebanese University, Hadat Campus, Beirut, Lebanon.
| | - Nicolas Radomski
- Paris-Est University, French Agency for Food, Environmental and Occupational Health and Safety (Anses), Laboratory for Food Safety (LSAL), Maisons-Alfort, France.
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Joerger RD. Salmonella enterica's "Choice": Itaconic Acid Degradation or Bacteriocin Immunity Genes. Genes (Basel) 2020; 11:genes11070797. [PMID: 32679707 PMCID: PMC7397319 DOI: 10.3390/genes11070797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/08/2020] [Accepted: 07/13/2020] [Indexed: 11/30/2022] Open
Abstract
Itaconic acid is an immunoregulatory metabolite produced by macrophages in response to pathogen invasion. It also exhibits antibacterial activity because it is an uncompetitive inhibitor of isocitrate lyase, whose activity is required for the glyoxylate shunt to be operational. Some bacteria, such as Yersinia pestis, encode enzymes that can degrade itaconic acid and therefore eliminate this metabolic inhibitor. Studies, primarily with Salmonella enterica subspecies enterica serovar Typhimurium, have demonstrated the presence of similar genes in this pathogen and the importance of these genes for the persistence of the pathogen in murine hosts. This minireview demonstrates that, based on Blast searches of 1063 complete Salmonella genome sequences, not all Salmonella serovars possess these genes. It is also shown that the growth of Salmonella isolates that do not possess these genes is sensitive to the acid under glucose-limiting conditions. Interestingly, most of the serovars without the three genes, including serovar Typhi, harbor DNA at the corresponding genomic location that encodes two open reading frames that are similar to bacteriocin immunity genes. It is hypothesized that these genes could be important for Salmonella that finds itself in strong competition with other Enterobacteriacea in the intestinal tract—for example, during inflammation.
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Affiliation(s)
- Rolf D Joerger
- Department of Animal and Food Sciences, University of Delaware, Newark, DE 19716, USA
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10
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Key FM, Posth C, Esquivel-Gomez LR, Hübler R, Spyrou MA, Neumann GU, Furtwängler A, Sabin S, Burri M, Wissgott A, Lankapalli AK, Vågene ÅJ, Meyer M, Nagel S, Tukhbatova R, Khokhlov A, Chizhevsky A, Hansen S, Belinsky AB, Kalmykov A, Kantorovich AR, Maslov VE, Stockhammer PW, Vai S, Zavattaro M, Riga A, Caramelli D, Skeates R, Beckett J, Gradoli MG, Steuri N, Hafner A, Ramstein M, Siebke I, Lösch S, Erdal YS, Alikhan NF, Zhou Z, Achtman M, Bos K, Reinhold S, Haak W, Kühnert D, Herbig A, Krause J. Emergence of human-adapted Salmonella enterica is linked to the Neolithization process. Nat Ecol Evol 2020; 4:324-333. [PMID: 32094538 PMCID: PMC7186082 DOI: 10.1038/s41559-020-1106-9] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 01/08/2020] [Indexed: 11/13/2022]
Abstract
It has been hypothesized that the Neolithic transition towards an
agricultural and pastoralist economy facilitated the emergence of human adapted
pathogens. Here, we recovered eight Salmonella enterica subsp.
enterica genomes from human skeletons of transitional
foragers, pastoralists, and agro-pastoralists in western Eurasia that were up to
6,500 years old. Despite the high genetic diversity of S.
enterica all ancient bacterial genomes clustered in a single
previously uncharacterized branch that contains S. enterica
adapted to multiple mammalian species. All ancient bacterial genomes from
prehistoric (agro-)pastoralists fall within a part of this branch that also
includes the human-specific S. enterica Paratyphi C,
illustrating the evolution of a human pathogen over a period of five thousand
years. Bacterial genomic comparisons suggest that the earlier ancient strains
were not host specific, differed in pathogenic potential, and experienced
convergent pseudogenization that accompanied their downstream host adaptation.
These observations support the concept that the emergence of human adapted
S. enterica is linked to human cultural
transformations.
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Affiliation(s)
- Felix M Key
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany. .,Institute for Medical Engineering and Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA. .,Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
| | - Cosimo Posth
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany
| | - Luis R Esquivel-Gomez
- Transmission, Infection, Diversification & Evolution Group, Max Planck Institute for the Science of Human History, Jena, Germany
| | - Ron Hübler
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany
| | - Maria A Spyrou
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany
| | - Gunnar U Neumann
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany
| | - Anja Furtwängler
- Institute for Archaeological Sciences, Archaeo- and Palaeogenetics, University of Tuebingen, Tuebingen, Germany
| | - Susanna Sabin
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany
| | - Marta Burri
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany
| | - Antje Wissgott
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany
| | - Aditya Kumar Lankapalli
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany
| | - Åshild J Vågene
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany
| | - Matthias Meyer
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Sarah Nagel
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Rezeda Tukhbatova
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany.,Laboratory of Structural Biology, Kazan Federal University, Kazan, Russian Federation
| | - Aleksandr Khokhlov
- Samara State University of Social Sciences and Education, Samara, Russian Federation
| | - Andrey Chizhevsky
- Institute of Archaeology named after A.Kh. Khalikov of the Academy of Sciences of the Republic of Tatarstan, Kazan, Russian Federation
| | - Svend Hansen
- Eurasia Department, German Archaeological Institute, Berlin, Germany
| | | | - Alexey Kalmykov
- 'Nasledie' Cultural Heritage Unit, Stavropol, Russian Federation
| | - Anatoly R Kantorovich
- Department of Archaeology, Faculty of History, Lomonosov Moscow State University, Moscow, Russian Federation
| | | | - Philipp W Stockhammer
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany.,Institute for Pre- and Protohistoric Archaeology and Archaeology of the Roman Provinces, Ludwig Maximilian University Munich, Munich, Germany
| | - Stefania Vai
- Department of Biology, University of Florence, Florence, Italy
| | - Monica Zavattaro
- Museum of Anthropology and Ethnology, Museum System of the University of Florence, Florence, Italy
| | - Alessandro Riga
- Department of Biology, University of Florence, Florence, Italy
| | - David Caramelli
- Department of Biology, University of Florence, Florence, Italy
| | - Robin Skeates
- Department of Archaeology, Durham University, Durham, UK
| | | | | | - Noah Steuri
- Institute of Archaeological Sciences and Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland
| | - Albert Hafner
- Institute of Archaeological Sciences and Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland
| | | | - Inga Siebke
- Department of Physical Anthropology Institute of Forensic Medicine, University of Bern, Bern, Switzerland
| | - Sandra Lösch
- Department of Physical Anthropology Institute of Forensic Medicine, University of Bern, Bern, Switzerland
| | | | | | - Zhemin Zhou
- Warwick Medical School, University of Warwick, Coventry, UK
| | - Mark Achtman
- Warwick Medical School, University of Warwick, Coventry, UK
| | - Kirsten Bos
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany
| | - Sabine Reinhold
- Eurasia Department, German Archaeological Institute, Berlin, Germany
| | - Wolfgang Haak
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany
| | - Denise Kühnert
- Transmission, Infection, Diversification & Evolution Group, Max Planck Institute for the Science of Human History, Jena, Germany
| | - Alexander Herbig
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany.
| | - Johannes Krause
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany.
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11
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Kipper D, Hellfeldt RM, De Carli S, Lehmann FKM, Fonseca ASK, Ikuta N, Lunge VR. Salmonella serotype assignment by sequencing analysis of intergenic regions of ribosomal RNA operons. Poult Sci 2020; 98:5989-5998. [PMID: 31134273 DOI: 10.3382/ps/pez285] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Accepted: 05/03/2019] [Indexed: 02/02/2023] Open
Abstract
Salmonella laboratorial detection is usually carried out by bacteriological culture and serological methods. Salmonella isolates are then classified into more than 2,650 serotypes with different somatic (O) and flagellar (H) antigenic combinations. More recently, DNA analysis methods were developed and applied for the identification of Salmonella serotypes, including intergenic spacer regions (ISRs) that separates DNA-encoding ribosomal subunits (rRNA gene) in Salmonella genomes. The present study aimed to evaluate the nucleotide diversity of the ISRs in 2 rRNA operons (rrnB and rrnH) for the assignment of Salmonella serotypes. A total of 63 Salmonella isolates (bacterial cultures) from 21 serotypes were obtained in the period of 2014 to 2017. DNA was extracted, and PCRs were used to detect the genus Salmonella and 4 important serotypes: Enteritidis, Gallinarum, Heidelberg, and Typhimurium. ISRs of the operons rrnB and rrnH were amplified by PCR and then sequenced. All sequence results were submitted to BLASTn search and were aligned in comparison to 72 Salmonella reference nucleotide sequences. The results demonstrated that 60 (95.2%) samples returned a sequence of the same serotype (determined by the traditional serological procedure) after searching in BLASTn and/or in the alignment with the reference sequences for both operons (rrnB and rrnH). These PCR-sequencing procedures had a general agreement index of 0.792 based on the Kappa analysis, 98.7% sensitivity value, 100% specificity, and 98.4% accuracy. Three different phylogenetic trees were generated from the alignments with the sequences of rrnH, rrnB, and rrnH plus rrnB and isolates clustered in specific branches according to the serotypes.
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Affiliation(s)
- Diéssy Kipper
- Laboratório de Diagnóstico Molecular, Universidade Luterana do Brasil (ULBRA), Canoas, Rio Grande do Sul, 92425-900, Brazil
| | - Rafaella Martins Hellfeldt
- Curso de Medicina Veterinária, Universidade Luterana do Brasil (ULBRA), Canoas, Rio Grande do Sul, 92425-900, Brazil
| | - Silvia De Carli
- Laboratório de Diagnóstico Molecular, Universidade Luterana do Brasil (ULBRA), Canoas, Rio Grande do Sul, 92425-900, Brazil.,Laboratório de Virologia Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, 91501-970, Brazil
| | | | | | - Nilo Ikuta
- Laboratório de Diagnóstico Molecular, Universidade Luterana do Brasil (ULBRA), Canoas, Rio Grande do Sul, 92425-900, Brazil.,Curso de Medicina Veterinária, Universidade Luterana do Brasil (ULBRA), Canoas, Rio Grande do Sul, 92425-900, Brazil.,Simbios Biotecnologia, Cachoeirinha, Rio Grande do Sul, 94940-030, Brazil
| | - Vagner Ricardo Lunge
- Laboratório de Diagnóstico Molecular, Universidade Luterana do Brasil (ULBRA), Canoas, Rio Grande do Sul, 92425-900, Brazil.,Curso de Medicina Veterinária, Universidade Luterana do Brasil (ULBRA), Canoas, Rio Grande do Sul, 92425-900, Brazil.,Simbios Biotecnologia, Cachoeirinha, Rio Grande do Sul, 94940-030, Brazil
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12
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Cheng RA, Eade CR, Wiedmann M. Embracing Diversity: Differences in Virulence Mechanisms, Disease Severity, and Host Adaptations Contribute to the Success of Nontyphoidal Salmonella as a Foodborne Pathogen. Front Microbiol 2019; 10:1368. [PMID: 31316476 PMCID: PMC6611429 DOI: 10.3389/fmicb.2019.01368] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 05/31/2019] [Indexed: 12/19/2022] Open
Abstract
Not all Salmonella enterica serovars cause the same disease. S. enterica represents an incredibly diverse species comprising >2,600 unique serovars. While some S. enterica serovars are host-restricted, others infect a wide range of hosts. The diseases that nontyphoidal Salmonella (NTS) serovars cause vary considerably, with some serovars being significantly more likely to cause invasive disease in humans than others. Furthermore, while genomic analyses have advanced our understanding of the genetic diversity of these serovars, they have not been able to fully account for the observed clinical differences. One overarching challenge is that much of what is known about Salmonella's general biology and virulence strategies is concluded from studies examining a select few serovars, especially serovar Typhimurium. As targeted control strategies have been implemented to control select serovars, an increasing number of foodborne outbreaks involving serovars that are less frequently associated with human clinical illness are being detected. Harnessing what is known about the diversity of NTS serovars represents an important factor in achieving the ultimate goal of reducing salmonellosis-associated morbidity and mortality worldwide. In this review we summarize the current understanding of the differences and similarities among NTS serovars, highlighting the virulence mechanisms, genetic differences, and sources that characterize S. enterica diversity and contribute to its success as a foodborne pathogen.
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Affiliation(s)
- Rachel A. Cheng
- Department of Food Science, Cornell University, Ithaca, NY, United States
| | - Colleen R. Eade
- Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, NY, United States
- Department of Chemistry, University of North Carolina at Charlotte, Charlotte, NC, United States
| | - Martin Wiedmann
- Department of Food Science, Cornell University, Ithaca, NY, United States
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13
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Leekitcharoenphon P, Sørensen G, Löfström C, Battisti A, Szabo I, Wasyl D, Slowey R, Zhao S, Brisabois A, Kornschober C, Kärssin A, Szilárd J, Černý T, Svendsen CA, Pedersen K, Aarestrup FM, Hendriksen RS. Cross-Border Transmission of Salmonella Choleraesuis var. Kunzendorf in European Pigs and Wild Boar: Infection, Genetics, and Evolution. Front Microbiol 2019; 10:179. [PMID: 30787923 PMCID: PMC6373457 DOI: 10.3389/fmicb.2019.00179] [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: 09/17/2018] [Accepted: 01/23/2019] [Indexed: 11/21/2022] Open
Abstract
Salmonella enterica subspecies enterica serotype Choleraesuis is a swine adapted serovar. S. Choleraesuis variant Kunzendorf is responsible for the majority of outbreaks among pigs. S. Choleraesuis is rare in Europe, although there have been serious outbreaks in pigs including two outbreaks in Denmark in 1999–2000 and 2012–2013. Here, we elucidate the epidemiology, possible transmission routes and sources, and clonality of European S. Choleraesuis isolates including the Danish outbreak isolates. A total of 102 S. Choleraesuis isolates from different European countries and the United States, covering available isolates from the last two decades were selected for whole genome sequencing. We applied a temporally structured sequence analysis within a Bayesian framework to reconstruct a temporal and spatial phylogenetic tree. MLST type, resistance genes, plasmid replicons, and accessory genes were identified using bioinformatics tools. Fifty-eight isolates including 11 out of 12 strains from wild boars were pan-susceptible. The remaining isolates carried multiple resistance genes. Eleven different plasmid replicons in eight plasmids were determined among the isolates. Accessory genes were associated to the identified resistance genes and plasmids. The European S. Choleraesuis was estimated to have emerged in ∼1837 (95% credible interval, 1733–1983) with the mutation rate of 1.02 SNPs/genome/year. The isolates were clustered according to countries and neighbor countries. There were transmission events between strains from the United States and European countries. Wild boar and pig isolates were genetically linked suggesting cross-border transmission and transmission due to a wildlife reservoir. The phylogenetic tree shows that multiple introductions were responsible for the outbreak of 2012–2013 in Denmark, and suggests that poorly disinfected vehicles crossing the border into Denmark were potentially the source of the outbreak. Low levels of single nucleotide polymorphisms (SNPs) differences (0–4 SNPs) can be observed between clonal strains isolated from different organs of the same animal. Proper disinfection of livestock vehicles and improved quality control of livestock feed could help to prevent future spread of S. Choleraesuis or other more serious infectious diseases such as African swine fever (ASF) in the European pig production system.
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Affiliation(s)
- Pimlapas Leekitcharoenphon
- European Union Reference Laboratory for Antimicrobial Resistance, WHO Collaborating Center for Antimicrobial Resistance in Food Borne Pathogens and Genomics, Research Group for Genomic Epidemiology, National Food Institute, Kongens Lyngby, Denmark
| | - Gitte Sørensen
- European Union Reference Laboratory for Antimicrobial Resistance, WHO Collaborating Center for Antimicrobial Resistance in Food Borne Pathogens and Genomics, Research Group for Genomic Epidemiology, National Food Institute, Kongens Lyngby, Denmark
| | | | - Antonio Battisti
- Istituto Zooprofilattico Sperimentale del Lazio e della Toscana, National Reference Laboratory for Antimicrobial Resistance, Rome, Italy
| | - Istvan Szabo
- National Salmonella Reference Laboratory, Unit Molecular Microbiology and Genome Analysis, Federal Institute for Risk Assessment, Berlin, Germany
| | - Dariusz Wasyl
- National Veterinary Research Institute Department of Microbiology, National Reference Laboratory for Salmonellosis and Antimicrobial Resistance, Puławy, Poland
| | - Rosemarie Slowey
- Department of Agriculture, Food and the Marine Laboratories, Celbridge, Ireland
| | - Shaohua Zhao
- Division of Animal and Food Microbiology, Center for Veterinary Medicine, United States Food and Drug Administration, Laurel, MD, United States
| | - Anne Brisabois
- French Agency for Food, Environmental and Occupational Health and Safety, Maisons-Alfort, France
| | | | - Age Kärssin
- Veterinaar- ja Toidulaboratoorium, Tartu, Estonia
| | - Jánosi Szilárd
- Bakteriológiai Laboratórium, Állategészségügyi Diagnosztikai Igazgatóság, Nemzeti Élelmiszerlánc-biztonsági Hivatal, Budapest, Hungary
| | - Tomáš Černý
- Státní Veterinární Ústav Praha, Prague, Czechia
| | - Christina Aaby Svendsen
- European Union Reference Laboratory for Antimicrobial Resistance, WHO Collaborating Center for Antimicrobial Resistance in Food Borne Pathogens and Genomics, Research Group for Genomic Epidemiology, National Food Institute, Kongens Lyngby, Denmark
| | - Karl Pedersen
- National Veterinary Institute, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Frank M Aarestrup
- European Union Reference Laboratory for Antimicrobial Resistance, WHO Collaborating Center for Antimicrobial Resistance in Food Borne Pathogens and Genomics, Research Group for Genomic Epidemiology, National Food Institute, Kongens Lyngby, Denmark
| | - Rene S Hendriksen
- European Union Reference Laboratory for Antimicrobial Resistance, WHO Collaborating Center for Antimicrobial Resistance in Food Borne Pathogens and Genomics, Research Group for Genomic Epidemiology, National Food Institute, Kongens Lyngby, Denmark
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14
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Das S, Sreevidya VS, Udvadia AJ, Gyaneshwar P. Dopamine-induced sulfatase and its regulator are required for Salmonella enterica serovar Typhimurium pathogenesis. MICROBIOLOGY-SGM 2019; 165:302-310. [PMID: 30648943 DOI: 10.1099/mic.0.000769] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Catecholamine hormones enhance the virulence of pathogenic bacteria. Studies in the 1980s made intriguing observations that catecholamines were required for induction of sulfatase activity in many enteric pathogens, including Salmonella enterica serovar Typhimurium. In this report, we show that STM3122 and STM3124, part of horizontally acquired Salmonella pathogenesis island 13, encode a catecholamine-induced sulfatase and its regulator, respectively. Induction of sulfatase activity was independent of the well-studied QseBC and QseEF two-component regulatory systems. S. Typhimurium 14028S mutants lacking STM3122 or STM3124 showed reduced virulence in zebrafish. Because catecholamines are inactivated by sulfation in the mammalian gut, S. Typhimurium could utilize CA-induced sulfatase to access free catecholamines for growth and virulence.
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Affiliation(s)
- Seema Das
- Department of Biological Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | | | - Ava J Udvadia
- Department of Biological Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | - Prasad Gyaneshwar
- Department of Biological Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
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15
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Salmonella Pathogenicity Island 1 Is Expressed in the Chicken Intestine and Promotes Bacterial Proliferation. Infect Immun 2018; 87:IAI.00503-18. [PMID: 30396895 DOI: 10.1128/iai.00503-18] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 10/24/2018] [Indexed: 12/12/2022] Open
Abstract
Salmonella enterica serovar Enteritidis is a common cause of foodborne illness in the United States. The bacterium can be transmitted to humans via contaminated chicken meat and eggs, and virulence in humans requires type III secretion system 1 (TTSS-1), encoded on Salmonella pathogenicity island 1 (SPI-1). Chickens often carry S Enteritidis subclinically, obscuring the role of SPI-1 in facilitating bacterial colonization. To evaluate the role of SPI-1 in the infection of chicks by Salmonella, we created and utilized strains harboring a stable fluorescent reporter fusion designed to quantify SPI-1 expression within the intestinal tracts of animals. Using mutants unable to express TTSS-1, we demonstrated the important role of the secretion system in facilitating bacterial colonization. We further showed that coinoculation of an SPI-1 mutant with the wild-type strain increased the number of mutant organisms in intestinal tissue and contents, suggesting that the wild type rescues the mutant. Our results support the hypothesis that SPI-1 facilitates S Enteritidis colonization of the chicken and make SPI-1 an attractive target in preventing Salmonella carriage and colonization in chickens to reduce contamination of poultry meat and eggs by this foodborne pathogen.
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16
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Elder JR, Paul NC, Burin R, Guard J, Shah DH. Genomic organization and role of SPI-13 in nutritional fitness of Salmonella. Int J Med Microbiol 2018; 308:1043-1052. [PMID: 30466554 DOI: 10.1016/j.ijmm.2018.10.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 09/21/2018] [Accepted: 10/10/2018] [Indexed: 02/07/2023] Open
Abstract
Salmonella pathogenicity island 13 (SPI-13) contributes to the virulence of Salmonella. The majority of the SPI-13 genes encode proteins putatively involved in bacterial metabolism, however, their functions largely remain uncharacterized. It is currently unknown if SPI-13 contributes to metabolic fitness of Salmonella and, if so, what are the metabolic substrates for the protein encoded by genes within SPI-13. We employed Phenotype Microarray (Biolog, USA) to compare the metabolic properties of SPI-13 deficient mutant (ΔSPI-13) and the WT parent strain of non-typhoidal Salmonella enterica sub sp. enterica serovar Enteritidis (S. Enteritidis). The results of Phenotype Microarray revealed that SPI-13 is required for efficient utilization of two micronutrients, namely, d-glucuronic acid (DGA) and tyramine (TYR), as sole sources of carbon and/or nitrogen. By systematic deletion of the individual gene(s), we identified specific genes within SPI-13 that are required for efficient utilization of DGA (SEN2977-80) and TYR (SEN2967 and SEN2971-72) as sole nutrient sources. The results show that SPI-13 mediated DGA and TYR metabolic pathways afford nutritional fitness to S. Enteritidis. Comparative genomics analysis of the SPI-13 locus from 247 Salmonella strains belonging to 57 different serovars revealed that SPI-13 genes specifically involved in the metabolism of DGA and TYR are highly conserved in Salmonella enterica. Because DGA and TYR are naturally present as metabolic byproducts in the gastrointestinal tract and other host tissues, we propose a metabolic model that shows that the role of SPI-13 mediated DGA and TYR metabolism in the nutritional fitness of Salmonella is likely linked to nutritional virulence of this pathogen.
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Affiliation(s)
- Jacob R Elder
- Department of Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, 99164-7040, USA
| | - Narayan C Paul
- Department of Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, 99164-7040, USA
| | - Raquel Burin
- Department of Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, 99164-7040, USA
| | - Jean Guard
- Egg Quality and Safety Research Unit, Agriculture Research Service, United StatesDepartment of Agriculture, Athens, GA, 30605, USA
| | - Devendra H Shah
- Department of Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, 99164-7040, USA; Paul Allen School for Global Animal Health, College of Veterinary Medicine, Washington State University, Pullman, Washington, 99164-7040, USA.
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17
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Chiok KL, Paul NC, Adekanmbi EO, Srivastava SK, Shah DH. Dimethyl adenosine transferase (KsgA) contributes to cell-envelope fitness in Salmonella Enteritidis. Microbiol Res 2018; 216:108-119. [PMID: 30269850 DOI: 10.1016/j.micres.2018.08.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 08/17/2018] [Accepted: 08/21/2018] [Indexed: 01/02/2023]
Abstract
We previously reported that inactivation of a universally conserved dimethyl adenosine transferase (KsgA) attenuates virulence and increases sensitivity to oxidative and osmotic stress in Salmonella Enteritidis. Here, we show a role of KsgA in cell-envelope fitness as a potential mechanism underlying these phenotypes in Salmonella. We assessed structural integrity of the cell-envelope by transmission electron microscopy, permeability barrier function by determining intracellular accumulation of ethidium bromide and electrophysical properties by dielectrophoresis, an electrokinetic tool, in wild-type and ksgA knock-out mutants of S. Enteritidis. Deletion of ksgA resulted in disruption of the structural integrity, permeability barrier and distorted electrophysical properties of the cell-envelope. The cell-envelope fitness defects were alleviated by expression of wild-type KsgA (WT-ksgA) but not by its catalytically inactive form (ksgAE66A), suggesting that the dimethyl transferase activity of KsgA is important for cell-envelope fitness in S. Enteritidis. Upon expression of WT-ksgA and ksgAE66A in inherently permeable E. coli cells, the former strengthened and the latter weakened the permeability barrier, suggesting that KsgA also contributes to the cell-envelope fitness in E. coli. Lastly, expression of ksgAE66A exacerbated the cell-envelope fitness defects, resulting in impaired S. Enteritidis interactions with human intestinal epithelial cells, and human and avian phagocytes. This study shows that KsgA contributes to cell-envelope fitness and opens new avenues to modulate cell-envelopes via use of KsgA-antagonists.
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Affiliation(s)
- Kim Lam Chiok
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040, USA
| | - Narayan C Paul
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040, USA
| | - Ezekiel O Adekanmbi
- Department of Chemical and Materials Engineering, University of Idaho, Moscow, Idaho 83844-1021, USA
| | - Soumya K Srivastava
- Department of Chemical and Materials Engineering, University of Idaho, Moscow, Idaho 83844-1021, USA
| | - Devendra H Shah
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040, USA; Paul Allen School for Global Animal Health, Washington State University, Pullman, WA 99164-7040, USA.
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18
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Zhou Z, Lundstrøm I, Tran-Dien A, Duchêne S, Alikhan NF, Sergeant MJ, Langridge G, Fotakis AK, Nair S, Stenøien HK, Hamre SS, Casjens S, Christophersen A, Quince C, Thomson NR, Weill FX, Ho SYW, Gilbert MTP, Achtman M. Pan-genome Analysis of Ancient and Modern Salmonella enterica Demonstrates Genomic Stability of the Invasive Para C Lineage for Millennia. Curr Biol 2018; 28:2420-2428.e10. [PMID: 30033331 PMCID: PMC6089836 DOI: 10.1016/j.cub.2018.05.058] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 02/09/2018] [Accepted: 05/18/2018] [Indexed: 02/04/2023]
Abstract
Salmonella enterica serovar Paratyphi C causes enteric (paratyphoid) fever in humans. Its presentation can range from asymptomatic infections of the blood stream to gastrointestinal or urinary tract infection or even a fatal septicemia [1]. Paratyphi C is very rare in Europe and North America except for occasional travelers from South and East Asia or Africa, where the disease is more common [2, 3]. However, early 20th-century observations in Eastern Europe [3, 4] suggest that Paratyphi C enteric fever may once have had a wide-ranging impact on human societies. Here, we describe a draft Paratyphi C genome (Ragna) recovered from the 800-year-old skeleton (SK152) of a young woman in Trondheim, Norway. Paratyphi C sequences were recovered from her teeth and bones, suggesting that she died of enteric fever and demonstrating that these bacteria have long caused invasive salmonellosis in Europeans. Comparative analyses against modern Salmonella genome sequences revealed that Paratyphi C is a clade within the Para C lineage, which also includes serovars Choleraesuis, Typhisuis, and Lomita. Although Paratyphi C only infects humans, Choleraesuis causes septicemia in pigs and boar [5] (and occasionally humans), and Typhisuis causes epidemic swine salmonellosis (chronic paratyphoid) in domestic pigs [2, 3]. These different host specificities likely evolved in Europe over the last ∼4,000 years since the time of their most recent common ancestor (tMRCA) and are possibly associated with the differential acquisitions of two genomic islands, SPI-6 and SPI-7. The tMRCAs of these bacterial clades coincide with the timing of pig domestication in Europe [6]. Salmonella enterica aDNA sequences were found within 800-year-old teeth and bone The invasive Para C lineage was defined from 50,000 modern S. enterica genomes The Para C lineage includes Ragna, the aDNA genome, and human and swine pathogens Only few genomic changes occurred in the Para C lineage over its 3,000-year history
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Affiliation(s)
- Zhemin Zhou
- Warwick Medical School, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK.
| | - Inge Lundstrøm
- Centre for GeoGenetics, Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5-7, 1350 Copenhagen, Denmark
| | - Alicia Tran-Dien
- Unité des Bactéries Pathogènes Entériques, Institut Pasteur, Paris, France
| | - Sebastián Duchêne
- Department of Biochemistry and Molecular Biology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Nabil-Fareed Alikhan
- Warwick Medical School, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
| | - Martin J Sergeant
- Warwick Medical School, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
| | | | - Anna K Fotakis
- Centre for GeoGenetics, Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5-7, 1350 Copenhagen, Denmark
| | | | | | - Stian S Hamre
- Department of Archaeology, History, Cultural Studies and Religion, University of Bergen, Post Box 7805, 5020 Bergen, Norway
| | - Sherwood Casjens
- Pathology Department, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
| | | | - Christopher Quince
- Warwick Medical School, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
| | | | | | - Simon Y W Ho
- School of Life and Environmental Sciences; University of Sydney, Sydney NSW 2006, Australia
| | - M Thomas P Gilbert
- Centre for GeoGenetics, Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5-7, 1350 Copenhagen, Denmark; NTNU University Museum, N-7491 Trondheim, Norway.
| | - Mark Achtman
- Warwick Medical School, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK.
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Espinoza RA, Silva-Valenzuela CA, Amaya FA, Urrutia ÍM, Contreras I, Santiviago CA. Differential roles for pathogenicity islands SPI-13 and SPI-8 in the interaction of Salmonella Enteritidis and Salmonella Typhi with murine and human macrophages. Biol Res 2017; 50:5. [PMID: 28202086 PMCID: PMC5311848 DOI: 10.1186/s40659-017-0109-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 02/04/2017] [Indexed: 02/03/2023] Open
Abstract
Background Salmonella pathogenicity island (SPI)-13 is conserved in many serovars of S. enterica, including S. Enteritidis, S. Typhimurium and S. Gallinarum. However, it is absent in typhoid serovars such as S. Typhi and Paratyphi A, which carry SPI-8 at the same genomic location. Because the interaction with macrophages is a critical step in Salmonella pathogenicity, in this study we investigated the role played by SPI-13 and SPI-8 in the interaction of S. Enteritidis and S. Typhi with cultured murine (RAW264.7) and human (THP-1) macrophages. Results
Our results showed that SPI-13 was required for internalization of S. Enteritidis in murine but not human macrophages. On the other hand, SPI-8 was not required for the interaction of S. Typhi with human or murine macrophages. Of note, the presence of an intact copy of SPI-13 in a S. Typhi mutant carrying a deletion of SPI-8 did not improve its ability to be internalized by, or survive in human or murine macrophages. Conclusions Altogether, our results point out to different roles for SPI-13 and SPI-8 during Salmonella infection. While SPI-13 contributes to the interaction of S. Enteritidis with murine macrophages, SPI-8 is not required in the interaction of S. Typhi with murine or human macrophages. We hypothesized that typhoid serovars have lost SPI-13 and maintained SPI-8 to improve their fitness during another phase of human infection. Electronic supplementary material The online version of this article (doi:10.1186/s40659-017-0109-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Rodrigo A Espinoza
- Laboratorio de Microbiología, Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santos Dumont 964, Independencia, Santiago, Chile
| | - Cecilia A Silva-Valenzuela
- Laboratorio de Microbiología, Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santos Dumont 964, Independencia, Santiago, Chile.,Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, MA, 02111, USA
| | - Fernando A Amaya
- Laboratorio de Microbiología, Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santos Dumont 964, Independencia, Santiago, Chile
| | - Ítalo M Urrutia
- Laboratorio de Microbiología, Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santos Dumont 964, Independencia, Santiago, Chile
| | - Inés Contreras
- Laboratorio de Microbiología, Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santos Dumont 964, Independencia, Santiago, Chile.
| | - Carlos A Santiviago
- Laboratorio de Microbiología, Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santos Dumont 964, Independencia, Santiago, Chile.
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Arya G, Holtslander R, Robertson J, Yoshida C, Harris J, Parmley J, Nichani A, Johnson R, Poppe C. Epidemiology, Pathogenesis, Genoserotyping, Antimicrobial Resistance, and Prevention and Control of Non-Typhoidal Salmonella Serovars. CURRENT CLINICAL MICROBIOLOGY REPORTS 2017. [DOI: 10.1007/s40588-017-0057-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Elder JR, Chiok KL, Paul NC, Haldorson G, Guard J, Shah DH. Erratum to: The Salmonella pathogenicity island 13 contributes to pathogenesis in streptomycin pre-treated mice but not in day-old chickens. Gut Pathog 2016; 8:35. [PMID: 27413396 PMCID: PMC4943040 DOI: 10.1186/s13099-016-0114-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 05/24/2016] [Indexed: 12/02/2022] Open
Affiliation(s)
- Jacob R Elder
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040 USA
| | - Kim Lam Chiok
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040 USA
| | - Narayan C Paul
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040 USA
| | - Gary Haldorson
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040 USA
| | - Jean Guard
- Egg Quality and Safety Research Unit, Agriculture Research Service, United States Department of Agriculture, Athens, GA 30605 USA
| | - Devendra H Shah
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040 USA ; Paul Allen School for Global Animal Health, College of Veterinary Medicine, Washington State University, Pullman, WA 99164-7040 USA
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