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Rahmawaty A, Cheng LW, Wang PC, Chen SC. Comparative pathogenicity and histopathological analysis of Edwardsiella anguillarum intraperitoneal infection in milkfish (Chanos chanos), Nile tilapia (Oreochromis niloticus) and Asian seabass (Lates calcarifer). JOURNAL OF FISH DISEASES 2024; 47:e13982. [PMID: 38899543 DOI: 10.1111/jfd.13982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 05/27/2024] [Accepted: 05/31/2024] [Indexed: 06/21/2024]
Abstract
Edwardsiella anguillarum, a highly virulent species within the Edwardsiella genus, causes significant mortality in milkfish farms in Taiwan. This study aimed to investigate the comparison of milkfish susceptibility, a newly identified host species in Taiwanese aquaculture, with other species Nile tilapia (Oreochromis niloticus) and Asian seabass (Lates calcarifer), to E. anguillarum, elucidating its pathogenicity across both seawater and freshwater aquaculture environments. The results showed milkfish exhibited the highest mortality rate of 85% within 48 h of infection, whereas Nile tilapia exhibited a mortality rate of 70% between the second- and tenth-day post challenge, and seabass exhibited a mortality rate of 25% between the second- and sixth-day post challenge. Gross lesions observed in milkfish included splenomegaly and haemorrhage, whereas Nile tilapia exhibited signs of ascites, exophthalmia and brain haemorrhage. Seabass displayed spleen granulomas and haemorrhage at the injection site. Histopathological analysis revealed common features across all three species, including multifocal necrosis, bacterial presence in the necrotic areas, serositis and oedema. Asian seabass also exhibited chronic lesions in the form of splenic granulomas. This study highlights the high susceptibility of milkfish and Nile tilapia to E. anguillarum, emphasizing the urgent need for further investigation into targeted vaccine development for these fish species. These results not only deepen our understanding of the differing levels of pathogenicity among the three species but also offer valuable insights for improving disease prevention and management strategies in aquaculture, including those applied within polyculture systems and for the maintenance of aquaculture water environments.
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Affiliation(s)
- Atiek Rahmawaty
- International College, International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, International College, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Li-Wu Cheng
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Pei-Chi Wang
- International College, International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, International College, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Research Centre for Fish Vaccine and Diseases, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Southern Taiwan Fish Diseases Research Centre, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Shih-Chu Chen
- International College, International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, International College, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Research Centre for Fish Vaccine and Diseases, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Southern Taiwan Fish Diseases Research Centre, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- General Research Service Center, National Pingtung University of Science and Technology, Pingtung, Taiwan
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Janda JM, Duman M. Expanding the Spectrum of Diseases and Disease Associations Caused by Edwardsiella tarda and Related Species. Microorganisms 2024; 12:1031. [PMID: 38792860 PMCID: PMC11124366 DOI: 10.3390/microorganisms12051031] [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: 04/29/2024] [Revised: 05/12/2024] [Accepted: 05/16/2024] [Indexed: 05/26/2024] Open
Abstract
The genus Edwardsiella, previously residing in the family Enterobacteriaceae and now a member of the family Hafniaceae, is currently composed of five species, although the taxonomy of this genus is still unsettled. The genus can primarily be divided into two pathogenic groups: E. tarda strains are responsible for almost all human infections, and two other species (E. ictaluri, E. piscicida) cause diseases in fish. Human infections predominate in subtropical habitats of the world and in specific geospatial regions with gastrointestinal disease, bloodborne infections, and wound infections, the most common clinical presentations in decreasing order. Gastroenteritis can present in many different forms and mimic other intestinal disturbances. Chronic gastroenteritis is not uncommon. Septicemia is primarily found in persons with comorbid conditions including malignancies and liver disease. Mortality rates range from 9% to 28%. Most human infections are linked to one of several risk factors associated with freshwater or marine environments such as seafood consumption. In contrast, edwardsiellosis in fish is caused by two other species, in particular E. ictaluri. Both E. ictaluri and E. piscicida can cause massive outbreaks of disease in aquaculture systems worldwide, including enteric septicemia in channel catfish and tilapia. Collectively, these species are increasingly being recognized as important pathogens in clinical and veterinary medicine. This article highlights and provides a current perspective on the taxonomy, microbiology, epidemiology, and pathogenicity of this increasingly important group.
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Affiliation(s)
- J. Michael Janda
- Kern County Public Health Laboratory, Bakersfield, CA 93306, USA
| | - Muhammed Duman
- Aquatic Animal Disease Department, Faculty of Veterinary Medicine, Bursa Uludag University, 16059 Bursa, Turkey;
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Byadgi OV, Rahmawaty A, Wang PC, Chen SC. Comparative genomics of Edwardsiella anguillarum and Edwardsiella piscicida isolated in Taiwan enables the identification of distinctive features and potential virulence factors using Oxford-Nanopore MinION® sequencing. JOURNAL OF FISH DISEASES 2023; 46:287-297. [PMID: 36571326 DOI: 10.1111/jfd.13743] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 12/08/2022] [Accepted: 12/09/2022] [Indexed: 06/17/2023]
Abstract
Edwardsiella tarda (ET) and Edwardsiella anguillarum (EA) are the most harmful bacterial fish pathogens in Taiwan. However, there is confusion regarding the genotypic identification of E. tarda and E. piscicida (EP). Therefore, we used a novel Nanopore MinION MK1C platform to sequence and compare the complete genomes of E. piscicida and E. anguillarum. The number of coding genes, rRNA, and tRNA recorded for E. anguillarum and E. piscicida were 8322, 25, and 98, and 5458, 25, and 98, respectively. Ribosomal multilocus sequence typing (rMLST) for E. piscicida indicated 35 rps. The shared clusters between E. anguillarum and E. piscicida indicated several unique clusters for the individual genomes. The phylogenetic tree analysis for all complete genomes indicated that E. anguillarum and E. piscicida were placed into two species-specific genotypes. Distribution of subsystems for annotated genomes found that genes related to virulence, defence, and disease for E. anguillarum were 103 and those for E. piscicida were 60 and pathogenic islands (PI) were 498 and 225, respectively. Vaccine candidates were identified in silico from the core genes using high antigenic, solubility, and secretion probabilities. Altogether, the genome data revealed distinctive features between E. anguillarum and E. piscicida, which suggest different pathogenicity and thus the need for separate preventive strategies.
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Affiliation(s)
- Omkar Vijay Byadgi
- International College, International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Atiek Rahmawaty
- International College, International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Pei-Chi Wang
- International College, International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Research Centre for Fish Vaccine and Diseases, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Southern Taiwan Fish Diseases Research Centre, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Shih-Chu Chen
- International College, International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Research Centre for Fish Vaccine and Diseases, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Southern Taiwan Fish Diseases Research Centre, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Research Centre for Animal Biologics, National Pingtung University of Science and Technology, Pingtung, Taiwan
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Rehman MNU, Dawar FU, Zeng J, Fan L, Feng W, Wang M, Yang N, Guo G, Zheng J. Complete genome sequence analysis of Edwardsiella tarda SC002 from hatchlings of Siamese crocodile. Front Vet Sci 2023; 10:1140655. [PMID: 36968469 PMCID: PMC10034365 DOI: 10.3389/fvets.2023.1140655] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 02/08/2023] [Indexed: 03/11/2023] Open
Abstract
Edwardsiella tarda is a Gram-negative, facultative anaerobic rod-shaped bacterium and the causative agent of the systemic disease “Edwardsiellosis”. It is commonly prevalent in aquatic organisms with subsequent economic loss and hence has attracted increasing attention from researchers. In this study, we investigated the complete genome sequence of a highly virulent isolate Edwardsiella tarda SC002 isolated from hatchlings of the Siamese crocodile. The genome of SC002 consisted of one circular chromosome of length 3,662,469 bp with a 57.29% G+C content and four novel plasmids. A total of 3,734 protein-coding genes, 12 genomic islands (GIs), 7 prophages, 48 interspersed repeat sequences, 248 tandem repeat sequences, a CRISPR component with a total length of 175 bp, and 171 ncRNAs (tRNA = 106, sRNA = 37, and rRNA = 28) were predicted. In addition, the coding genes of assembled genome were successfully annotated against eight general databases (NR = 3,618/3,734, COG = 2,947/3,734, KEGG = 3,485/3,734, SWISS-PROT = 2,787/3,734, GO = 2,648/3,734, Pfam = 2,648/3,734, CAZy = 130/3,734, and TCDB = 637/3,734) and four pathogenicity-related databases (ARDB = 11/3,734, CARD = 142/3,734, PHI = 538/3,734, and VFDB = 315/3,734). Pan-genome and comparative genome analyses of the complete sequenced genomes confirmed their evolutionary relationships. The present study confirmed that E. tarda SC002 is a potential pathogen bearing a bulk amount of antibiotic resistance, virulence, and pathogenic genes and its open pan-genome may enhance its host range in the future.
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Affiliation(s)
- Muhammad Nafees Ur Rehman
- Laboratory of Microbiological Engineering (Infection and Immunity), School of Life Sciences, Hainan University, Haikou, China
| | - Farman Ullah Dawar
- Department of Zoology, Kohat University of Science and Technology, Kohat, Pakistan
| | - Jifeng Zeng
- Laboratory of Microbiological Engineering (Infection and Immunity), School of Life Sciences, Hainan University, Haikou, China
- One Health Institute, Hainan University, Haikou, China
| | - Lixia Fan
- Laboratory of Microbiological Engineering (Infection and Immunity), School of Life Sciences, Hainan University, Haikou, China
| | - Wei Feng
- Laboratory of Microbiological Engineering (Infection and Immunity), School of Life Sciences, Hainan University, Haikou, China
| | - Mengqi Wang
- Laboratory of Microbiological Engineering (Infection and Immunity), School of Life Sciences, Hainan University, Haikou, China
| | - Nuo Yang
- Laboratory of Microbiological Engineering (Infection and Immunity), School of Life Sciences, Hainan University, Haikou, China
| | - Guiying Guo
- Laboratory of Microbiological Engineering (Infection and Immunity), School of Life Sciences, Hainan University, Haikou, China
| | - Jiping Zheng
- Laboratory of Microbiological Engineering (Infection and Immunity), School of Life Sciences, Hainan University, Haikou, China
- One Health Institute, Hainan University, Haikou, China
- *Correspondence: Jiping Zheng
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Higashigawa M, Ito M, Nashida Y. Edwardsiella tarda is an Important Causative Agent of Maternal-Fetal Infections in Pregnant Women: a Case Report and Japanese Literature Review. Jpn J Infect Dis 2023; 76:80-83. [PMID: 36184397 DOI: 10.7883/yoken.jjid.2022.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We present a case study of a 6-day-old male infant who was referred to our hospital for fever, jaundice, and poor suckling, and was diagnosed with meningitis due to Edwardsiella tarda. We were able to detect E. tarda DNA after performing broad-range polymerase chain reaction targeting the bacterial 16S rRNA gene followed by a Basic Local Alignment Search Tool analysis of the DNA extracted from the cerebrospinal fluid. Furthermore, Japanese literature review showed that E. tarda caused perinatal invasive infections in mothers and infants and that the risk of fetal meningitis might be related to the food preference of Japanese people for raw fish. It is crucial to disseminate the information that pregnant women should refrain from eating high-risk raw fish, including freshwater fish.
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Affiliation(s)
| | - Mitsue Ito
- Department of Pediatrics/Neonatology, Japanese Red Cross Ise Hospital, Japan
| | - Yuji Nashida
- Department of Pediatrics/Neonatology, Japanese Red Cross Ise Hospital, Japan
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Rahmawaty A, Chen MY, Byadgi OV, Wang PC, Chen SC. Phenotypic and genotypic analysis of Edwardsiella isolates from Taiwan indicates wide variation with a particular reference to Edwardsiella tarda and Edwardsiella anguillarum. JOURNAL OF FISH DISEASES 2022; 45:1659-1672. [PMID: 35916068 DOI: 10.1111/jfd.13688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 07/01/2022] [Accepted: 07/06/2022] [Indexed: 06/15/2023]
Abstract
Edwardsiella spp. is a gram-negative, facultatively anaerobic, intracellular bacteria threatening the aquaculture industry worldwide. Noticeably, E. tarda is now genotypically classified into three distinct groups (E. tarda, E. piscicida and E. anguillarum), but morphologically, it is unclear due to varying degrees of virulence in different fish hosts. Hence, to reclassify E. tarda, we investigated differences in genotypes, phenotypes and pathogenicity. We collected Edwardsiella isolates from five different counties of Taiwan between 2017 and 2021. At first, gyrB gene was amplified for a phylogenetic tree from 40 isolates from different fish and one reference isolate, BCRC10670, from the human. Thirty-nine strains clustered into E. anguillarum, 1 strain into E. piscicida and 1 strain into E. tarda from human strain. Second, all isolates were characterized using various phenotypic (API 20E biochemical profiles) and genotypic (pulsed-field gel electrophoresis [PFGE], and virulence-related gene detection). SpeI digestion revealed 10 pulsotypes and I-CeuI into 7 pulsotypes. Virulent genes (citC, gadB, katB, mukF and fimA) confirmed in 35, 31, 28, 37 and 38 isolates, respectively. Finally, in vivo challenge test in milkfish (Chanos chanos) indicated the highest mortality from E. anguillarum. Overall, results revealed unique features with Edwardsiella spp. genotypes and pathogenicity, which are relevant to the host and provide useful insights for future vaccine development.
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Affiliation(s)
- Atiek Rahmawaty
- International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, International College, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Mei-Yun Chen
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Omkar Vijay Byadgi
- International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, International College, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Pei-Chi Wang
- International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, International College, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Research Centre for Fish Vaccine and Diseases, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Southern Taiwan Fish Diseases Research Centre, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Shih-Chu Chen
- International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, International College, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Research Centre for Fish Vaccine and Diseases, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Southern Taiwan Fish Diseases Research Centre, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Research Centre for Animal Biologics, National Pingtung University of Science and Technology, Pingtung, Taiwan
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Armwood AR, Griffin MJ, Richardson BM, Wise DJ, Ware C, Camus AC. Pathology and virulence of Edwardsiella tarda, Edwardsiella piscicida, and Edwardsiella anguillarum in channel (Ictalurus punctatus), blue (Ictalurus furcatus), and channel × blue hybrid catfish. JOURNAL OF FISH DISEASES 2022; 45:1683-1698. [PMID: 35880718 PMCID: PMC9796362 DOI: 10.1111/jfd.13691] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 07/08/2022] [Accepted: 07/11/2022] [Indexed: 05/19/2023]
Abstract
In the mid-2010s, Edwardsiella tarda was reaffiliated into three discrete taxa (E. anguillarum, E. piscicida, and E. tarda), obscuring previous descriptions of E. tarda-induced pathology in fish. To clarify ambiguity regarding the pathology of E. tarda, E. piscicida, and E. anguillarum infections in US farm-raised catfish, channel catfish (Ictalurus punctatus), blue catfish (I. furcatus), and channel × blue catfish hybrids were challenged with comparable doses of each bacterium. The most severe pathology and mortality occurred in fish challenged with E. piscicida, supporting previous reports of increased pathogenicity in commercially important ictalurids, while E. anguillarum and E. tarda warrant only minimal concern. Acute pathologic lesions among bacterial species were predominantly necrotizing and characteristic of gram-negative sepsis but became progressively granulomatous over time. After 100 days, survivors were exposed to the approximate median lethal doses of E. piscicida and E. ictaluri, revealing some cross-protective effects among E. piscicida, E. anguillarum, and E. ictaluri. In contrast, no fish that survived E. tarda challenge demonstrated any protection against E. piscicida or E. ictaluri. This work supports reports of increased susceptibility of channel, blue, and hybrid catfish to E. piscicida, while highlighting potential cross-protective affects among fish associated Edwardsiella spp.
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Affiliation(s)
- Abigail R. Armwood
- Department of Pathology, College of Veterinary MedicineUniversity of GeorgiaAthensGeorgiaUSA
| | - Matt J. Griffin
- Department of Pathobiology and Population Medicine, College of Veterinary MedicineMississippi State UniversityStonevilleMississippiUSA
- Thad Cochran National Warmwater Aquaculture Center, Delta Research and Extension CenterMississippi State UniversityStonevilleMississippiUSA
| | - Bradley M. Richardson
- Warmwater Aquaculture Research UnitAgricultural Research Service, United States Department of AgricultureStonevilleMississippiUSA
| | - David J. Wise
- Thad Cochran National Warmwater Aquaculture Center, Delta Research and Extension CenterMississippi State UniversityStonevilleMississippiUSA
- Mississippi Agriculture and Forestry Experiment Station, College of Forest ResourcesMississippi State UniversityStonevilleMississippiUSA
| | - Cynthia Ware
- Thad Cochran National Warmwater Aquaculture Center, Delta Research and Extension CenterMississippi State UniversityStonevilleMississippiUSA
| | - Alvin C. Camus
- Department of Pathology, College of Veterinary MedicineUniversity of GeorgiaAthensGeorgiaUSA
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Chen W, Huang J, Wang W, Wang Y, Chen H, Wang Q, Zhang Y, Liu Q, Yang D. Multi-tissue scRNA-seq reveals immune cell landscape of turbot ( Scophthalmus maximus). FUNDAMENTAL RESEARCH 2022; 2:550-561. [PMID: 38933994 PMCID: PMC11197760 DOI: 10.1016/j.fmre.2021.12.015] [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: 09/10/2021] [Revised: 12/24/2021] [Accepted: 12/28/2021] [Indexed: 10/19/2022] Open
Abstract
In vertebrates, bony fishes possess not only innate immune cells but also T and B cells that are equivalent to those in mammals. However, the precise sub-cluster of immune cells in teleost fish remains largely unknown. Herein, we developed a dynamic bacterial infection model in turbot (Scophthalmus maximus) and created a fish immune cell landscape (FICL) for a primary lymphoid organ (head kidney), a secondary lymphoid organ (spleen), and barrier tissues (gills and posterior intestine). Moreover, through comprehensive characterization of the expression profiles of 16 clusters, including dendritic cells-like (DCs-like), macrophages (MΦs), neutrophils, NK cells, as well as 12 sub-clusters of T and B cells, we found that CD8+ CTLs, CD4-CD8- T, Th17 and ILC3-2 like cells possess a bifunctional role associated with cytotoxicity and immunoregulation during bacterial infection. To our knowledge, these results could provide a useful resource for a better understanding of immune cells in teleost fish and could act as a comprehensive knowledge base for assessing the evolutionary mechanism of adaptive immunity in vertebrates.
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Affiliation(s)
- Weijie Chen
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jianchang Huang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Wei Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Ying Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hao Chen
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Qiyao Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yuanxing Zhang
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai 200237, China
| | - Qin Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
| | - Dahai Yang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai 200237, China
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Wang LK, Sun SS, Zhang SY, Nie P, Xie HX. Orf1B controls secretion of T3SS proteins and contributes to Edwardsiella piscicida adhesion to epithelial cells. Vet Res 2022; 53:40. [PMID: 35692056 PMCID: PMC9190107 DOI: 10.1186/s13567-022-01057-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 04/12/2022] [Indexed: 11/26/2022] Open
Abstract
Edwardsiella piscicida is a Gram-negative enteric pathogen that causes hemorrhagic septicemia in fish. The type III secretion system (T3SS) is one of its two most important virulence islands. T3SS protein EseJ inhibits E. piscicida adhesion to epithelioma papillosum cyprini (EPC) cells by negatively regulating type 1 fimbria. Type 1 fimbria helps E. piscicida to adhere to fish epithelial cells. In this study, we characterized a functional unknown protein (Orf1B) encoded within the T3SS gene cluster of E. piscicida. This protein consists of 122 amino acids, sharing structural similarity with YscO in Vibrio parahaemolyticus. Orf1B controls secretion of T3SS translocon and effectors in E. piscicida. By immunoprecipitation, Orf1B was shown to interact with T3SS ATPase EsaN. This interaction may contribute to the assembly of the ATPase complex, which energizes the secretion of T3SS proteins. Moreover, disruption of Orf1B dramatically decreased E. piscicida adhesion to EPC cells due to the increased steady-state protein level of EseJ within E. piscicida. Taken together, this study partially unraveled the mechanisms through which Orf1B promotes secretion of T3SS proteins and contributes to E. piscicida adhesion. This study helps to improve our understanding on molecular mechanism of E. piscicida pathogenesis.
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Affiliation(s)
- Long Kun Wang
- Dalian Ocean University, Dalian, 116023, Liaoning, China.,State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, Hubei, China
| | - Shan Shan Sun
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, Hubei, China.,College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Shu Ya Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, Hubei, China.,College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Pin Nie
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, Hubei, China
| | - Hai Xia Xie
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, Hubei, China.
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Coordinate regulation of carbohydrate metabolism and virulence by PtsH in pathogen Edwardsiella piscicida. Appl Microbiol Biotechnol 2022; 106:2063-2077. [PMID: 35218391 PMCID: PMC8881556 DOI: 10.1007/s00253-022-11848-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Revised: 02/16/2022] [Accepted: 02/20/2022] [Indexed: 11/02/2022]
Abstract
Carbohydrate metabolism of bacterial pathogens conducts crucial roles in regulating pathogenesis but the molecular mechanisms by which metabolisms and virulence are been modulated and coordinated remain to be illuminated. Here, we investigated in this regard Edwardsiella piscicida, a notorious zoonotic pathogen previously named E. tarda that could ferment very few PTS sugars including glucose, fructose, mannose, N-acetylglucosamine, and N-acetylgalactosamine. We systematically characterized the roles of each of the predicted 23 components of phosphotransferase system (PTS) with the respective in-frame deletion mutants and defined medium containing specific PTS sugar. In addition, PtsH was identified as the crucial PTS component potentiating the utilization of all the tested PTS sugars. Intriguingly, we also found that PtsH while not Fpr was involved in T3SS gene expression and was essential for the pathogenesis of E. piscicida. To corroborate this, His15 and Ser46, the two established PtsH residues involved in phosphorylation cascade, showed redundant roles in regulating T3SS yields. Moreover, PtsH was shown to facilitate mannose uptake and transform it into mannose-6-phosphate, an allosteric substrate established to activate EvrA to augment bacterial virulence. Collectively, our observations provide new insights into the roles of PTS reciprocally regulating carbohydrate metabolism and virulence gene expression. KEY POINTS: • PTS components' roles for sugar uptake are systematically determined in Edwardsiella piscicida. • PtsH is involved in saccharides uptake and in the regulation of E. piscicida's T3SS expression. • PtsH phosphorylation at His15 and Ser46 is essential for the T3SS expression and virulence.
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Ma R, Liu Y, Gan J, Qiao H, Ma J, Zhang Y, Bu Y, Shao S, Zhang Y, Wang Q. OUP accepted manuscript. Nucleic Acids Res 2022; 50:3777-3798. [PMID: 35325196 PMCID: PMC9023278 DOI: 10.1093/nar/gkac180] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 02/25/2022] [Accepted: 03/07/2022] [Indexed: 11/14/2022] Open
Affiliation(s)
| | | | | | - Haoxian Qiao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jiabao Ma
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yi Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yifan Bu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Shuai Shao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai 200237, China
| | - Yuanxing Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai 200237, China
| | - Qiyao Wang
- To whom correspondence should be addressed. Tel: +86 21 64253306; Fax: +86 21 64253306;
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12
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Sayed M, Ozdemir O, Essa M, Olivier A, Karsi A, Lawrence ML, Abdelhamed H. Virulence and live vaccine potential of Edwardsiella piscicida phoP and phoQ mutants in catfish against edwardsiellosis. JOURNAL OF FISH DISEASES 2021; 44:1463-1474. [PMID: 34037985 DOI: 10.1111/jfd.13453] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/10/2021] [Accepted: 05/11/2021] [Indexed: 06/12/2023]
Abstract
Edwardsiella piscicida is a Gram-negative facultative intracellular bacterium causing edwardsiellosis in catfish, the largest aquaculture industry in the United States. A safe and effective vaccine is an urgent need to avoid economic losses associated with E. piscicida outbreaks. PhoP/PhoQ is a two-component signal transduction system (TCS) that plays an important role in bacterial pathogenesis through sense and response to environmental and host stress signals. This study aimed to explore the contribution of PhoQ/PhoP in E. piscicida virulence and develop live attenuated vaccines against E. piscicida infection in channel catfish (Ictalurus punctatus) and hybrid catfish (channel catfish ♀ × blue catfish (I. furcatus) ♂). In the current study, two in-frame deletion mutants were constructed by deleting phoP (ETAC_09785) and phoQ (ETAC_09790) genes in E. piscicida strain C07-087, and the virulence and protection efficacy of the constructed strains were evaluated in catfish following intraperitoneal injection. Both EpΔphoP and EpΔphoQ strains had a delayed adaptation to oxidative stress (0.2% H2 O2 ) compared to E. piscicida wild type. The EpΔphoP and EpΔphoQ mutants produced significantly less biofilm compared to wild-type E. piscicida. Notably, EpΔphoP and EpΔphoQ mutants were significantly attenuated in channel catfish compared with wild-type E. piscicida (6.63% and 4.17% versus 49.16% mortalities), and channel catfish vaccinated with EpΔphoP and EpΔphoQ were significantly protected (95.65% and 97.92% survival) against E. piscicida infection at 21 days post-vaccination. In hybrid catfish, EpΔphoP was significantly more attenuated than EpΔphoQ, but EpΔphoQ provided significantly better protection than EpΔphoP. EpΔphoP and EpΔphoQ strains both induced specific antibodies in channel catfish against E. piscicida at 14 and 21 days post-vaccination. This result indicated that EpΔphoP and EpΔphoQ mutants were safe and protective in channel catfish fingerlings, while EpΔphoP was safe in hybrid catfish. Our findings show that PhoP and PhoQ are required for adaptation to oxidative stress and biofilm formation and may help E. piscicida face tough environmental challenges; thus, functional PhoP and PhoQ are critical for a successful infection.
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Affiliation(s)
- Mohamed Sayed
- Department of Comparative Biomedical Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
- Department of Fish Diseases and Management, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - Ozan Ozdemir
- Department of Comparative Biomedical Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
| | - Manal Essa
- Department of Fish Diseases and Management, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - Alicia Olivier
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
| | - Attila Karsi
- Department of Comparative Biomedical Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
| | - Mark L Lawrence
- Department of Comparative Biomedical Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
| | - Hossam Abdelhamed
- Department of Comparative Biomedical Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
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13
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Comparative genomics of Edwardsiellaictaluri revealed four distinct host-specific genotypes and thirteen potential vaccine candidates. Genomics 2021; 113:1976-1987. [PMID: 33848586 DOI: 10.1016/j.ygeno.2021.04.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 12/31/2020] [Accepted: 04/05/2021] [Indexed: 02/02/2023]
Abstract
Edwardsiella ictaluri has been considered an important threat for catfish aquaculture industry for more than 4 decades and an emerging pathogen of farmed tilapia but only 9 sequenced genomes were publicly available. We hereby report two new complete genomes of E. ictaluri originated from diseased hybrid red tilapia (Oreochromis sp.) and striped catfish (Pangasianodon hypophthalmus) in Southeast Asia. E. ictaluri species has an open pan-genome consisting of 2615 core genes and 5592 pan genes. Phylogenetic analysis using core genome MLST (cgMLST) and ANI values consistently placed E. ictaluri isolates into 4 host-specific genotypes. Presence of unique genes and absence of certain genes from each genotype provided potential biomarkers for further development of genotyping scheme. Vaccine candidates with high antigenic, solubility and secretion probabilities were identified in silico from the core genes. Microevolution within the species is brought about by bacteriophages and insertion elements and possibly drive host adaptation.
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14
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Baseggio L, Silayeva O, Buller N, Landos M, Englestädter J, Barnes AC. Complete, closed and curated genome sequences of Photobacterium damselae subsp. piscicida isolates from Australia indicate mobilome-driven localized evolution and novel pathogenicity determinants. Microb Genom 2021; 7:000562. [PMID: 33885359 PMCID: PMC8208687 DOI: 10.1099/mgen.0.000562] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Despite the recent advances in sequencing technologies, the complete assembly of multi-chromosome genomes of the Vibrionaceae, often containing several plasmids, remains challenging. Using a combination of Oxford Nanopore MinION long reads and short Illumina reads, we fully sequenced, closed and curated the genomes of two strains of a primary aquatic pathogen Photobacterium damselae subsp. piscicida isolated in Australia. These are also the first genome sequences of P. damselae subsp. piscicida isolated in Oceania and, to our knowledge, in the Southern hemisphere. We also investigated the phylogenetic relationships between Australian and overseas isolates, revealing that Australian P. damselae subsp. piscicida are more closely related to the Asian and American strains rather than to the European ones. We investigated the mobilome and present new evidence showing that a host specialization process and progressive adaptive evolution to fish are ongoing in P. damselae subsp. piscicida, and are largely mediated by transposable elements, predominantly in chromosome 2, and by plasmids. Finally, we identified two novel potential virulence determinants in P. damselae subsp. piscicida - a chorismate mutase gene, which is ubiquitously retained and co-localized with the AIP56 apoptogenic toxin-encoding gene on the pPHDP10 plasmid, and transfer-messenger RNA gene ssrA located on the main chromosome, homologous to a critical-to-virulence determinant in Yersinia pseudotuberculosis. Our study describes, to our knowledge, the only fully closed and manually curated genomes of P. damselae subsp. piscicida available to date, offering new insights into this important fish pathogen and its evolution.
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Affiliation(s)
- Laura Baseggio
- School of Biological Sciences, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Oleksandra Silayeva
- School of Biological Sciences, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Nicky Buller
- Diagnostic and Laboratory Services (DDLS), Department of Primary Industries and Regional Development (DPIRD), 3 Baron-Hay Court, South Perth, Western Australia 6151, Australia
| | - Matt Landos
- Future Fisheries Veterinary Services, East Ballina, New South Wales 2478, Australia
| | - Jan Englestädter
- School of Biological Sciences, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Andrew C. Barnes
- School of Biological Sciences, University of Queensland, Brisbane, Queensland 4072, Australia
- *Correspondence: Andrew C. Barnes,
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15
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Ye L, Bae M, Cassilly CD, Jabba SV, Thorpe DW, Martin AM, Lu HY, Wang J, Thompson JD, Lickwar CR, Poss KD, Keating DJ, Jordt SE, Clardy J, Liddle RA, Rawls JF. Enteroendocrine cells sense bacterial tryptophan catabolites to activate enteric and vagal neuronal pathways. Cell Host Microbe 2020; 29:179-196.e9. [PMID: 33352109 DOI: 10.1016/j.chom.2020.11.011] [Citation(s) in RCA: 136] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 09/08/2020] [Accepted: 11/19/2020] [Indexed: 12/12/2022]
Abstract
The intestinal epithelium senses nutritional and microbial stimuli using epithelial sensory enteroendocrine cells (EEC). EECs communicate nutritional information to the nervous system, but whether they also relay signals from intestinal microbes remains unknown. Using in vivo real-time measurements of EEC and nervous system activity in zebrafish, we discovered that the bacteria Edwardsiella tarda activate EECs through the receptor transient receptor potential ankyrin A1 (Trpa1) and increase intestinal motility. Microbial, pharmacological, or optogenetic activation of Trpa1+EECs directly stimulates vagal sensory ganglia and activates cholinergic enteric neurons by secreting the neurotransmitter 5-hydroxytryptamine (5-HT). A subset of indole derivatives of tryptophan catabolism produced by E. tarda and other gut microbes activates zebrafish EEC Trpa1 signaling. These catabolites also directly stimulate human and mouse Trpa1 and intestinal 5-HT secretion. These results establish a molecular pathway by which EECs regulate enteric and vagal neuronal pathways in response to microbial signals.
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Affiliation(s)
- Lihua Ye
- Department of Molecular Genetics and Microbiology, Duke Microbiome Center, Duke University School of Medicine, Durham, NC 27710, USA; Division of Gastroenterology, Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA
| | - Munhyung Bae
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA
| | - Chelsi D Cassilly
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA
| | - Sairam V Jabba
- Department of Anesthesiology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Daniel W Thorpe
- Flinders Medical Research Institute, College of Medicine and Public Health, Flinders University, Adelaide, Australia
| | - Alyce M Martin
- Flinders Medical Research Institute, College of Medicine and Public Health, Flinders University, Adelaide, Australia
| | - Hsiu-Yi Lu
- Department of Molecular Genetics and Microbiology, Duke Microbiome Center, Duke University School of Medicine, Durham, NC 27710, USA
| | - Jinhu Wang
- Division of Cardiology, School of Medicine, Emory University, Atlanta, GA 30322, USA
| | - John D Thompson
- Department of Cell Biology, Regeneration Next, Duke University School of Medicine, Durham, NC 27710, USA
| | - Colin R Lickwar
- Department of Molecular Genetics and Microbiology, Duke Microbiome Center, Duke University School of Medicine, Durham, NC 27710, USA; Division of Gastroenterology, Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA
| | - Kenneth D Poss
- Department of Cell Biology, Regeneration Next, Duke University School of Medicine, Durham, NC 27710, USA
| | - Damien J Keating
- Flinders Medical Research Institute, College of Medicine and Public Health, Flinders University, Adelaide, Australia
| | - Sven-Eric Jordt
- Department of Anesthesiology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Jon Clardy
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA
| | - Rodger A Liddle
- Division of Gastroenterology, Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA; Department of Veterans Affairs, Durham, NC 27705, USA
| | - John F Rawls
- Department of Molecular Genetics and Microbiology, Duke Microbiome Center, Duke University School of Medicine, Durham, NC 27710, USA; Division of Gastroenterology, Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA.
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16
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Tekedar HC, Blom J, Kalindamar S, Nho S, Karsi A, Lawrence ML. Comparative genomics of the fish pathogens Edwardsiella ictaluri 93-146 and Edwardsiella piscicida C07-087. Microb Genom 2020; 6. [PMID: 32108566 PMCID: PMC7067208 DOI: 10.1099/mgen.0.000322] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Edwardsiella ictaluri and Edwardsiella piscicida are important fish pathogens affecting cultured and wild fish worldwide. To investigate the genome-level differences and similarities between catfish-adapted strains in these two species, the complete E. ictaluri 93-146 and E. piscicida C07-087 genomes were evaluated by applying comparative genomics analysis. All available complete (10) and non-complete (19) genomes from five Edwardsiella species were also included in a systematic analysis. Average nucleotide identity and core-genome phylogenetic tree analyses indicated that the five Edwardsiella species were separated from each other. Pan-/core-genome analyses for the 29 strains from the five species showed that genus Edwardsiella members have 9474 genes in their pan genome, while the core genome consists of 1421 genes. Orthology cluster analysis showed that E. ictaluri and E. piscicida genomes have the greatest number of shared clusters. However, E. ictaluri and E. piscicida also have unique features; for example, the E. ictaluri genome encodes urease enzymes and cytochrome o ubiquinol oxidase subunits, whereas E. piscicida genomes encode tetrathionate reductase operons, capsular polysaccharide synthesis enzymes and vibrioferrin-related genes. Additionally, we report for what is believed to be the first time that E. ictaluri 93-146 and three other E. ictaluri genomes encode a type IV secretion system (T4SS), whereas none of the E. piscicida genomes encode this system. Additionally, the E. piscicida C07-087 genome encodes two different type VI secretion systems. E. ictaluri genomes tend to encode more insertion elements, phage regions and genomic islands than E. piscicida. We speculate that the T4SS could contribute to the increased number of mobilome elements in E. ictaluri compared to E. piscicida. Two of the E. piscicida genomes encode full CRISPR-Cas regions, whereas none of the E. ictaluri genomes encode Cas proteins. Overall, comparison of the E. ictaluri and E. piscicida genomes reveals unique features and provides new insights on pathogenicity that may reflect the host adaptation of the two species.
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Affiliation(s)
- Hasan C Tekedar
- College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
| | - Jochen Blom
- Bioinformatics and Systems Biology, Justus-Liebig-University Giessen, 35392 Giessen, Hesse, Germany
| | - Safak Kalindamar
- College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
| | - Seongwon Nho
- Division of Microbiology, National Center for Toxicological Research/FDA, Jefferson, AR, USA
| | - Attila Karsi
- College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
| | - Mark L Lawrence
- College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
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17
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Abstract
Edwardsiella piscicida is an Enterobacteriaceae that is abundant in water and causes food and waterborne infections in fish, animals, and humans. The bacterium causes Edwardsiellosis in farmed fish and can lead to severe economic losses in aquaculture worldwide. E. piscicida is an intracellular pathogen that can also cause systemic infection. Type III and type VI secretion systems are the bacterium’s most lethal weapons against host defenses. It also possesses multi-antibiotic resistant genes and is selected and enriched in the environment due to the overuse of antibiotics. Therefore, the bacterium has great potential to contribute to the evolution of the resistome. All these properties have made this bacterium a perfect model to study bacteria virulence mechanisms and the spread of antimicrobial genes in the environment. We summarize recent advance in E. piscicida biology and provide insights into future research in virulence mechanisms, vaccine development and novel therapeutics.
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Affiliation(s)
- Ka Yin Leung
- a Guangdong Technion - Israel Institute of Technology, Biotechnology and Food Engineering , Shantou , Guangdong , China
| | - Qiyao Wang
- b State Key Laboratory of Bioreactor Engineering, School of Biotechnology, East China University of Science and Technology , Shanghai , China.,c Shanghai Engineering Research Center of Marine Cultured Animal Vaccines, East China University of Science and Technology , Shanghai , China.,d Shanghai Collaborative Innovation Center for Biomanufacturing, East China University of Science and Technology , Shanghai , China
| | - Zhiyun Yang
- a Guangdong Technion - Israel Institute of Technology, Biotechnology and Food Engineering , Shantou , Guangdong , China
| | - Bupe A Siame
- e Department of Biology , Trinity Western University , Langley , BC , Canada
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18
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Han Y, Wei L, Xiao J, Zhang Y, Wang Q, Zhou M. Identification and study of InV as an inverse autotransporter family representative in Edwardsiella piscicida. Arch Microbiol 2020; 202:1107-1116. [PMID: 32052095 PMCID: PMC7223825 DOI: 10.1007/s00203-019-01804-y] [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: 02/25/2019] [Revised: 12/17/2019] [Accepted: 12/26/2019] [Indexed: 12/15/2022]
Abstract
Invasins and intimins, members of virulence-related adhesin family which is involved in attachment and adherence to epithelial cells during infection, are found in various pathogens. These pathogens can attach to enterocytes and lead to the formation of a pedestal-like structure. Invasins and intimins belong to type Ve secretion systems, and the N-terminal β-barrel domain acts as a translocation pore to secrete the C-terminal passenger domain. However, the relationship between invasins/intimins and type III secretion system (T3SS) has been poorly studied. Based on the transposon insertion mutant library of Edwardsiella piscicida, we got a transposon insertion mutant with significant T3SS defect and identified the mutated gene ETAE_0323 (named inV later). This gene encoded a protein with 2359 amino acid residues and was predicted to be an invasin. To study the relationship between InV and T3SS, strains with N-terminus or C-terminus deleted InV fragments were made. However, none of them was able to copy the phenotype of the transposon insertion mutant previously identified. The localization of InV in ΔT3SS strain was not significantly different from WT, suggesting that the T3SS defect in the transposon insertion mutant was likely to be caused by polar effect. Nevertheless, depletion of inV still showed dramatic internalization and virulence defect in HeLa cell and zebrafish model, respectively, suggesting InV as a virulence related protein.
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Affiliation(s)
- Yu Han
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Lifan Wei
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Jingfan Xiao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Yuanxing Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.,Shanghai Collaborative Innovation Center for Biomanufacturing, 130 Meilong Road, Shanghai, 200237, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China
| | - Qiyao Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China. .,Shanghai Collaborative Innovation Center for Biomanufacturing, 130 Meilong Road, Shanghai, 200237, China. .,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China.
| | - Mian Zhou
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
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19
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Wei L, Qiao H, Sit B, Yin K, Yang G, Ma R, Ma J, Yang C, Yao J, Ma Y, Xiao J, Liu X, Zhang Y, Waldor MK, Wang Q. A Bacterial Pathogen Senses Host Mannose to Coordinate Virulence. iScience 2019; 20:310-323. [PMID: 31605945 PMCID: PMC6817725 DOI: 10.1016/j.isci.2019.09.028] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 08/19/2019] [Accepted: 09/20/2019] [Indexed: 11/21/2022] Open
Abstract
Bacterial pathogens are thought to activate expression of virulence genes upon detection of host-associated cues, but identification of the nature of such signals has proved difficult. We generated a genome-scale defined transposon mutant library in Edwardsiella piscicida, an important fish pathogen, to quantify the fitness of insertion mutants for intracellular growth in macrophages and in turbot (Scophthalmus maximus). These screens identified EvrA, a transcription activator that induces expression of esrB, a key virulence regulator. EvrA is directly bound and activated by mannose-6-phosphate (man-6P) derived from actively imported mannose. Mutants lacking EvrA or expressing an EvrA unable to bind man-6P were similarly attenuated in turbot. Exogenously added mannose promoted E. piscicida virulence, and high levels of mannose were detected in fish tissue. Together, these observations reveal that binding of a host-derived sugar to a transcription factor can facilitate pathogen sensing of the host environment and trigger virulence programs.
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Affiliation(s)
- Lifan Wei
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Haoxian Qiao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Brandon Sit
- Division of Infectious Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Kaiyu Yin
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Guanhua Yang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Ruiqing Ma
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jiabao Ma
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Chun Yang
- State Key Laboratory of Genetic Engineering, Department of Physiology and Biophysics, School of Life Sciences, Fudan University, Shanghai, 200433, China
| | - Jun Yao
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200433, China
| | - Yue Ma
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai 200237, China
| | - Jingfan Xiao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaohong Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai 200237, China
| | - Yuanxing Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai 200237, China
| | - Matthew K Waldor
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China; Division of Infectious Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA; Howard Hughes Medical Institute, Boston, MA 02115, USA
| | - Qiyao Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai 200237, China.
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20
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Griffin MJ, Petty BD, Ware C, Fogelson SB. Recovery and confirmation of Edwardsiella piscicida from a black crappie Pomoxis nigromaculatus (Lesueur, 1829). JOURNAL OF FISH DISEASES 2019; 42:1457-1461. [PMID: 31309579 DOI: 10.1111/jfd.13056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 05/03/2019] [Accepted: 05/07/2019] [Indexed: 06/10/2023]
Affiliation(s)
- Matt J Griffin
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, Mississippi
| | - B Denise Petty
- North Florida Aquatic Veterinary Services, Fort White, Florida
| | - Cynthia Ware
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, Mississippi
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21
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Tan J, Yang D, Wang Z, Zheng X, Zhang Y, Liu Q. EvpP inhibits neutrophils recruitment via Jnk-caspy inflammasome signaling in vivo. FISH & SHELLFISH IMMUNOLOGY 2019; 92:851-860. [PMID: 31129187 DOI: 10.1016/j.fsi.2019.05.051] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 05/22/2019] [Accepted: 05/22/2019] [Indexed: 06/09/2023]
Abstract
Innate immunity is regulated by phagocytic cells and is critical for host control of bacterial infection. In many bacteria, the type VI secretion system (T6SS) can affect bacterial virulence in certain environments, but little is known about the mechanisms underlying T6SS regulation of innate immune responses during infection in vivo. Here, we developed an infection model by microinjecting bacteria into the tail vein muscle of 3-day-post-fertilized zebrafish larvae, and found that both macrophages and neutrophils are essential for bacterial clearance. Further study revealed that EvpP plays a critical role in promoting the pathogenesis of Edwardsiella piscicida (E. piscicida) via inhibiting the phosphorylation of Jnk signaling to reduce the expression of chemokine (CXC motif) ligand 8 (cxcl8a), matrix metallopeptidase 13 (mmp13) and interleukin-1β (IL-1β) in vivo. Subsequently, by utilizing Tg (mpo:eGFP+/+) zebrafish larvae for E. piscicida infection, we found that the EvpP-inhibited Jnk-caspy (caspase-1 homolog) inflammasome signaling axis significantly suppressed the recruitment of neutrophils to infection sites, and the caspy- or IL-1β-morpholino (MO) knockdown larvae were more susceptible to infection and failed to restrict bacterial colonization in vivo. taken together, this interaction improves our understanding about the complex and contextual role of a bacterial T6SS effector in modulating the action of neutrophils during infection, and offers new insights into the warfare between bacterial weapons and host immunological surveillance.
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Affiliation(s)
- Jinchao Tan
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Dahai Yang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, 200237, China
| | - Zhuang Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Xin Zheng
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Yuanxing Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, 200237, China
| | - Qin Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, 200237, China.
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22
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Guan Y, Yin K, Zhou M, Yang M, Zhang Y, Liu X, Wang Q. EsrB negatively regulates expression of the glutamine sythetase GlnA in the fish pathogen Edwardsiella piscicida. FEMS Microbiol Lett 2019; 365:4810546. [PMID: 29346648 DOI: 10.1093/femsle/fny007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 01/13/2018] [Indexed: 12/13/2022] Open
Abstract
Edwardsiella piscicida is a gram-negative bacterial pathogen invading a wide range of fish species. Response regulator EsrB is essential for the activation of type III and type VI secretion systems (T3/T6SS). In this study, proteomes of the wild-type E. piscicida EIB202 and ΔesrB mutant strains were compared to identify the regulon components of EsrB cultured in DMEM allowing T3/T6SS expression. As a result, 19 proteins showed different expression, which were identified to be associated with T3/T6SS, related to amino acid transport and metabolism, and energy production. Particularly, GlnA, a glutamine synthetase essential for ammonia assimilation and glutamine biosynthesis from glutamate, was found to be regulated negatively by EsrB. Moreover, GlnA affected bacterial growth in vitro and bacterial colonization in vivo. Collectively, our results indicated that EsrB plays important roles in regulating the expression of metabolic pathways and virulence genes, including glutamine biosynthesis in E. piscicida during infection.
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Affiliation(s)
- Yunpeng Guan
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Kaiyu Yin
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Mian Zhou
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.,Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai 200237, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai 200237, China
| | - Minjun Yang
- Shanghai-MOST Key Laboratory of Health and Disease Genomics, Chinese National Human Genome Center at Shanghai, Shanghai 200237, China
| | - Yuanxing Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.,Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai 200237, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai 200237, China
| | - Xiaohong Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.,Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai 200237, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai 200237, China
| | - Qiyao Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.,Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai 200237, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai 200237, China
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23
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Ma R, Huang J, Zhang Y, Wang Q. Identification and characterization of FtsH mediating in vivo colonization and stress adaptation in the fish pathogen Edwardsiella piscicida. FEMS Microbiol Lett 2019; 366:5570582. [PMID: 31529028 DOI: 10.1093/femsle/fnz198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 09/12/2019] [Indexed: 01/10/2023] Open
Abstract
Edwardsiella piscicida is an important pathogenic enteric bacterium of fish. FtsH is a unique membrane-anchored AAA + protease that regulates protein homeostasis in bacteria. In cooperation with modulators HflK and HflC, FtsH is essential in enteric bacteria and controls the response to environmental stresses. Here, we used in vivo pattern analysis of conditional essentiality (PACE) and identified that ftsH and hflK/C were associated with impaired in vivo colonization in Edw. piscicida and attenuated internalization ability of ZF4 cells. The ftsH mutant displayed increased survival during prolonged treatment of starvation and high osmotic stresses in Edw. piscicida. Further analysis showed that the disruption of ftsH resulted in the overproduction of the established substrate LpxC, which is responsible for the synthesis of LPS (lipopolysaccharide), as well as the substrate YfgM, which is involved in high osmolality tolerance during stationary phase. However, the inconsistency in the abilities of the ftsH and hflK/C mutants to achieve YfgM-based osmotic resistance indicated that there might be multiple, while distinctive, pathways controlled by FtsH and the associated modulator proteins HflK/C. This investigation revealed the unique functions of FtsH and its modulator HflK/C in Edw. piscicida.
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Affiliation(s)
- Ruiqing Ma
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jianchang Huang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yuanxing Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China
| | - Qiyao Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China
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24
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Yang D, Liu X, Xu W, Gu Z, Yang C, Zhang L, Tan J, Zheng X, Wang Z, Quan S, Zhang Y, Liu Q. The Edwardsiella piscicida thioredoxin-like protein inhibits ASK1-MAPKs signaling cascades to promote pathogenesis during infection. PLoS Pathog 2019; 15:e1007917. [PMID: 31314784 PMCID: PMC6636751 DOI: 10.1371/journal.ppat.1007917] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 06/14/2019] [Indexed: 12/02/2022] Open
Abstract
It is important that bacterium can coordinately deliver several effectors into host cells to disturb the cellular progress during infection, however, the precise role of effectors in host cell cytosol remains to be resolved. In this study, we identified a new bacterial virulence effector from pathogenic Edwardsiella piscicida, which presents conserved crystal structure to thioredoxin family members and is defined as a thioredoxin-like protein (Trxlp). Unlike the classical bacterial thioredoxins, Trxlp can be translocated into host cells, mimicking endogenous thioredoxin to abrogate ASK1 homophilic interaction and phosphorylation, then suppressing the phosphorylation of downstream Erk1/2- and p38-MAPK signaling cascades. Moreover, Trxlp-mediated inhibition of ASK1-Erk/p38-MAPK axis promotes the pathogenesis of E. piscicida in zebrafish larvae infection model. Taken together, these data provide insights into the mechanism underlying the bacterial thioredoxin as a virulence effector in downmodulating the innate immune responses during E. piscicida infection. Thioredoxin (Trx) is universally conserved thiol-oxidoreductase that regulates numerous cellular pathways under thiol-based redox control in both prokaryotic and eukaryotic organisms. Despite its central importance, the mechanism of bacterial Trx recognizes its target proteins in host cellular signaling remains unknown. Here, we uncover a bacterial thioredoxin-like protein that can be translocated into host cells and mimic the endogenous TRX1 to target ASK1-MAPK signaling, finally facilitating bacterial pathogenesis. This work expands our understanding of bacterial thioredoxins in manipulating host innate immunity.
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Affiliation(s)
- Dahai Yang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China
| | - Xiaohong Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China
| | - Wenting Xu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Zhaoyan Gu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Cuiting Yang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Lingzhi Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Jinchao Tan
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Xin Zheng
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Zhuang Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Shu Quan
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Yuanxing Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China
| | - Qin Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- * E-mail:
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25
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Genome-Wide Identification of Fitness Factors in Seawater for Edwardsiella piscicida. Appl Environ Microbiol 2019; 85:AEM.00233-19. [PMID: 30877123 DOI: 10.1128/aem.00233-19] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 03/12/2019] [Indexed: 12/29/2022] Open
Abstract
Marine pathogens are transmitted from one host to another through seawater. Therefore, it is important for marine pathogens to maintain survival or growth in seawater. However, little is known about how marine pathogens adapt to living in seawater environments. Here, transposon insertion sequencing was performed to explore the genetic determinants of Edwardsiella piscicida survival in seawater at 16 and 28°C. Seventy-one mutants with mutations mainly in metabolism-, transportation-, and type III secretion system (T3SS)-related genes showed significantly increased or impaired fitness in 16°C water. In 28°C seawater, 63 genes associated with transcription and translation, as well as energy production and conversion, were essential for optimal survival of the bacterium. In particular, 11 T3SS-linked mutants displayed enhanced fitness in 16°C seawater but not in 28°C seawater. In addition, 13 genes associated with oxidative phosphorylation and 4 genes related to ubiquinone synthesis were identified for survival in 28°C seawater but not in 16°C seawater, which suggests that electron transmission and energy-producing aerobic respiration chain factors are indispensable for E. piscicida to maintain survival in higher-temperature seawater. In conclusion, we defined genes and processes related to metabolism and virulence that operate in E. piscicida to facilitate survival in low- and high-temperature seawater, which may underlie the infection outbreak mechanisms of E. piscicida and facilitate the development of improved vaccines against marine pathogens.IMPORTANCE Edwardsiella piscicida is one of the most important marine pathogens and causes serious edwardsiellosis in farmed fish during the summer-autumn seasonal changes, resulting in enormous losses to aquaculture industries worldwide. Survival and transmission of the pathogen in seawater are critical steps that increase the risk of outbreaks. To investigate the mechanism of survival in seawater for this marine pathogen, we used transposon insertion sequencing analysis to explore the fitness determinants in summer and autumn seawater. Approximately 127 genes linked to metabolism and virulence, as well as other processes, were revealed in E. piscicida to contribute to better adaptations to the seasonal alternations of seawater environments; these genes provide important insights into the infection outbreak mechanisms of E. piscicida and potential improved treatments or vaccines against marine pathogens.
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26
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Camus A, Griffin M, Armwood A, Soto E. A Spontaneous Outbreak of Systemic Edwardsiella piscicida Infection in Largemouth Bass Micropterus salmoides (Lacépède, 1802) in California, USA. JOURNAL OF FISH DISEASES 2019; 42:759-763. [PMID: 30801740 DOI: 10.1111/jfd.12961] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 12/28/2018] [Accepted: 12/31/2018] [Indexed: 06/09/2023]
Affiliation(s)
- Al Camus
- Department of Pathology, College of Veterinary Medicine, University of Georgia Athens, Athens, Georgia
| | - Matt Griffin
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, Mississippi
| | - Abigail Armwood
- Department of Pathology, College of Veterinary Medicine, University of Georgia Athens, Athens, Georgia
| | - Esteban Soto
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, California
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27
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Kalindamar S, Lu J, Abdelhamed H, Tekedar HC, Lawrence ML, Karsi A. Transposon mutagenesis and identification of mutated genes in growth-delayed Edwardsiella ictaluri. BMC Microbiol 2019; 19:55. [PMID: 30849940 PMCID: PMC6408766 DOI: 10.1186/s12866-019-1429-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 02/27/2019] [Indexed: 01/23/2023] Open
Abstract
Background Edwardsiella ictaluri is a Gram-negative facultative intracellular anaerobe and the etiologic agent of enteric septicemia of channel catfish (ESC). To the catfish industry, ESC is a devastating disease due to production losses and treatment costs. Identification of virulence mechanisms of E. ictaluri is critical to developing novel therapeutic approaches for the disease. Here, we report construction of a transposon insertion library and identification of mutated genes in growth-delayed E. ictaluri colonies. We also provide safety and efficacy of transposon insertion mutants in catfish. Results An E. ictaluri transposon insertion library with 45,000 transposants and saturating 30.92% of the TA locations present in the E. ictaluri genome was constructed. Transposon end mapping of 250 growth-delayed E. ictaluri colonies and bioinformatic analysis of sequences revealed 56 unique E. ictaluri genes interrupted by the MAR2xT7 transposon, which are involved in metabolic and cellular processes and mostly localized in the cytoplasm or cytoplasmic membrane. Of the 56 genes, 30 were associated with bacterial virulence. Safety and vaccine efficacy testing of 19 mutants showed that mutants containing transposon insertions in hypothetical protein (Eis::004), and Fe-S cluster assembly protein (IscX, Eis::039), sulfurtransferase (TusA, Eis::158), and universal stress protein A (UspA, Eis::194) were safe and provided significant protection (p < 0.05) against wild-type E. ictaluri. Conclusions The results indicate that random transposon mutagenesis causing growth-delayed phenotype results in identification bacterial virulence genes, and attenuated strains with transposon interrupted virulence genes could be used as vaccine to activate fish immune system.
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Affiliation(s)
- Safak Kalindamar
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
| | - Jingjun Lu
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
| | - Hossam Abdelhamed
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
| | - Hasan C Tekedar
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
| | - Mark L Lawrence
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
| | - Attila Karsi
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA.
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28
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Wen Y, Chen S, Jiang Z, Wang Z, Tan J, Hu T, Wang Q, Zhou X, Zhang Y, Liu Q, Yang D. Dysregulated haemolysin promotes bacterial outer membrane vesicles-induced pyroptotic-like cell death in zebrafish. Cell Microbiol 2019; 21:e13010. [DOI: 10.1111/cmi.13010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 11/29/2018] [Accepted: 01/04/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Ying Wen
- State Key Laboratory of Bioreactor Engineering; East China University of Science and Technology; Shanghai China
| | - Shouwen Chen
- State Key Laboratory of Bioreactor Engineering; East China University of Science and Technology; Shanghai China
| | - Zhiwei Jiang
- State Key Laboratory of Bioreactor Engineering; East China University of Science and Technology; Shanghai China
| | - Zhuang Wang
- State Key Laboratory of Bioreactor Engineering; East China University of Science and Technology; Shanghai China
| | - Jinchao Tan
- State Key Laboratory of Bioreactor Engineering; East China University of Science and Technology; Shanghai China
| | - Tianjian Hu
- State Key Laboratory of Bioreactor Engineering; East China University of Science and Technology; Shanghai China
| | - Qiyao Wang
- State Key Laboratory of Bioreactor Engineering; East China University of Science and Technology; Shanghai China
- Laboratory for Marine Biology and Biotechnology; Qingdao National Laboratory for Marine Science and Technology; Qingdao China
- Shanghai Collaborative Innovation Center for Biomanufacturing; Shanghai China
- Shanghai Engineering Research Center of Marine Cultured Animal Vaccines; Shanghai China
| | - Xiangshan Zhou
- State Key Laboratory of Bioreactor Engineering; East China University of Science and Technology; Shanghai China
| | - Yuanxing Zhang
- State Key Laboratory of Bioreactor Engineering; East China University of Science and Technology; Shanghai China
- Shanghai Collaborative Innovation Center for Biomanufacturing; Shanghai China
- Shanghai Engineering Research Center of Marine Cultured Animal Vaccines; Shanghai China
| | - Qin Liu
- State Key Laboratory of Bioreactor Engineering; East China University of Science and Technology; Shanghai China
- Laboratory for Marine Biology and Biotechnology; Qingdao National Laboratory for Marine Science and Technology; Qingdao China
- Shanghai Collaborative Innovation Center for Biomanufacturing; Shanghai China
- Shanghai Engineering Research Center of Marine Cultured Animal Vaccines; Shanghai China
| | - Dahai Yang
- State Key Laboratory of Bioreactor Engineering; East China University of Science and Technology; Shanghai China
- Shanghai Engineering Research Center of Marine Cultured Animal Vaccines; Shanghai China
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29
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Wei L, Qiao H, Liu B, Yin K, Liu Q, Zhang Y, Ma Y, Wang Q. MarTrack: A versatile toolbox of mariner transposon derivatives used for functional genetic analysis of bacterial genomes. Microbiol Res 2019; 219:84-93. [PMID: 30642470 DOI: 10.1016/j.micres.2018.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 11/22/2018] [Accepted: 11/23/2018] [Indexed: 11/28/2022]
Abstract
The mariner transposon family of Himar1 has been widely used for the random mutagenesis of bacteria to generate single insertions into the chromosome. Here, a versatile toolbox of mariner transposon derivatives was generated and applied to the functional genomics investigation of fish pathogen Edwardsiella piscicida. In this study, we combined the merits of the random mutagenesis of mariner transposon and common efficient reporter marker genes or regulatory elements, mcherry, gfp, luxAB, lacZ, sacBR, and PBAD and antibiotic resistance cassettes to construct a series of derivative transposon vectors, pMmch, pMKGR, pMCGR, pMXKGR, pMLKGR, pMSGR, and pMPR, based on the initial transposon pMar2xT7. The function and effectiveness of the modified transposons were verified by introducing them into E. piscicida EIB202. Based on the toolbox, a transposon insertion mutant library containing approximately 3.0 × 105 separated mutants was constructed to explore the upstream regulators of esrB, the master regulator of the type III and type VI secretion systems (T3/T6SS) in E. piscicida. Following analysis by Con-ARTIST, ETAE_2184 (renamed as EsrR) was screened out and identified as a novel regulator mediating T3SS expression. In addition, the esrR mutants displayed critical virulence attenuation. Due to the broad-range host compatibility of mariner transposons, the newly built transposon toolbox can be broadly applied for functional genomics studies in various bacteria.
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Affiliation(s)
- Lifan Wei
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China
| | - Haoxian Qiao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China
| | - Bing Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China
| | - Kaiyu Yin
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, PR China
| | - Qin Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, PR China
| | - Yuanxing Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, PR China
| | - Yue Ma
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, PR China.
| | - Qiyao Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, PR China.
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30
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Buján N, Toranzo AE, Magariños B. Edwardsiella piscicida: a significant bacterial pathogen of cultured fish. DISEASES OF AQUATIC ORGANISMS 2018; 131:59-71. [PMID: 30324915 DOI: 10.3354/dao03281] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Edwardsiella piscicida, a Gram-negative, facultative aerobic pathogen belonging to the Enterobacteriaceae family, is the etiological agent of edwardsiellosis in fish and a significant problem in global aquaculture. E. piscicida has been reported from a broad geographical range and has been isolated from more than 20 fish host species to date, but this is likely to be an underestimation, because misidentification of E. piscicida as other species within the genus remains to be resolved. Common clinical signs associated with edwardsiellosis include, but are not limited to, exophthalmia, haemorrhages of the skin and in several internal organs, mild to moderate dermal ulcerations, abdominal distension, discoloration in the fish surface, and erratic swimming. Many antibiotics are currently effective against E. piscicida, although legal restrictions and the cost of medicated feeds have encouraged significant research investment in vaccination for the management of edwardsiellosis in commercial aquaculture. Here we summarise the current understanding of E. piscicida and highlight the difficulties with species assignment and the need for further research on epidemiology and strain variability.
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Affiliation(s)
- N Buján
- Departamento de Microbioloxía y Parasitoloxía, Facultade de Bioloxía-Edif, CIBUS, and Instituto de Acuicultura, Universidade de Santiago de Compostela, Santiago de Compostela, 15782, Spain
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31
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LEE K, KIM HK, PARK SK, SOHN H, CHO Y, CHOI YM, JEONG DG, KIM JH. First report of the occurrence and whole-genome characterization of Edwardsiella tarda in the false killer whale (Pseudorca crassidens). J Vet Med Sci 2018; 80:1041-1046. [PMID: 29695679 PMCID: PMC6021894 DOI: 10.1292/jvms.17-0590] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 04/16/2018] [Indexed: 01/22/2023] Open
Abstract
Although several Edwardsiella tarda infections have been reported, its pathogenic role in marine mammals has not been investigated at the genome level. We investigated the genome of E. tarda strain KC-Pc-HB1, isolated from the false killer whale (Pseudorca crassidens) found bycaught in South Korea. The obtained genome was similar to that of human pathogenic E. tarda strains, but distinct from other Edwardsiella species. Although type III and VI secretion systems, which are essential for the virulence of other Edwardsiella species, were absent, several virulence-related genes involved in the pathogenesis of E. tarda were found in the genome. These results provide important insights into the E. tarda infecting marine mammals and give valuable information on potential virulence factors in this pathogen.
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Affiliation(s)
- Kyunglee LEE
- Cetacean Research Institute (CRI), National Institute of
Fisheries Science (NIFS), Ulsan 44780, Republic of Korea
| | - Hye Kwon KIM
- Infectious Disease Research Center, Korea Research Institute
of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Sung-Kyun PARK
- Infectious Disease Research Center, Korea Research Institute
of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Hawsun SOHN
- Cetacean Research Institute (CRI), National Institute of
Fisheries Science (NIFS), Ulsan 44780, Republic of Korea
| | - Yuna CHO
- Cetacean Research Institute (CRI), National Institute of
Fisheries Science (NIFS), Ulsan 44780, Republic of Korea
| | - Young-Min CHOI
- Cetacean Research Institute (CRI), National Institute of
Fisheries Science (NIFS), Ulsan 44780, Republic of Korea
| | - Dae Gwin JEONG
- Infectious Disease Research Center, Korea Research Institute
of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Ji Hyung KIM
- Infectious Disease Research Center, Korea Research Institute
of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
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32
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Zhang L, Jiang Z, Fang S, Huang Y, Yang D, Wang Q, Zhang Y, Liu Q. Systematic Identification of Intracellular-Translocated Candidate Effectors in Edwardsiella piscicida. Front Cell Infect Microbiol 2018; 8:37. [PMID: 29503811 PMCID: PMC5820615 DOI: 10.3389/fcimb.2018.00037] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 01/29/2018] [Indexed: 12/31/2022] Open
Abstract
Many bacterial pathogens inject effectors directly into host cells to target a variety of host cellular processes and promote bacterial dissemination and survival. Identifying the bacterial effectors and elucidating their functions are central to understanding the molecular pathogenesis of these pathogens. Edwardsiella piscicida is a pathogen with a wide host range, and very few of its effectors have been identified to date. Here, based on the genes significantly regulated by macrophage infection, we identified 25 intracellular translocation-positive candidate effectors, including all five previously reported effectors, namely EseG, EseJ, EseH, EseK, and EvpP. A subsequent secretion analysis revealed diverse secretion patterns for the 25 effector candidates, suggesting that multiple transport pathways were involved in the internalization of these candidate effectors. Further, we identified two novel type VI secretion system (T6SS) putative effectors and three outer membrane vesicles (OMV)-dependent putative effectors among the candidate effectors described above, and further analyzed their contribution to bacterial virulence in a zebrafish model. This work demonstrates an effective approach for screening bacterial effectors and expands the effectors repertoire in E. piscicida.
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Affiliation(s)
- Lingzhi Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Zhiwei Jiang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Shan Fang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Yajun Huang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Dahai Yang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Qiyao Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China.,Shanghai Collaborative Innovation Center for Bio-Manufacturing Technology, Shanghai, China
| | - Yuanxing Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China.,Shanghai Collaborative Innovation Center for Bio-Manufacturing Technology, Shanghai, China
| | - Qin Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China.,Shanghai Collaborative Innovation Center for Bio-Manufacturing Technology, Shanghai, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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Reichley SR, Ware C, Steadman J, Gaunt PS, García JC, LaFrentz BR, Thachil A, Waldbieser GC, Stine CB, Buján N, Arias CR, Loch T, Welch TJ, Cipriano RC, Greenway TE, Khoo LH, Wise DJ, Lawrence ML, Griffin MJ. Comparative Phenotypic and Genotypic Analysis of Edwardsiella Isolates from Different Hosts and Geographic Origins, with Emphasis on Isolates Formerly Classified as E. tarda, and Evaluation of Diagnostic Methods. J Clin Microbiol 2017; 55:3466-3491. [PMID: 28978684 PMCID: PMC5703813 DOI: 10.1128/jcm.00970-17] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 09/28/2017] [Indexed: 11/20/2022] Open
Abstract
Edwardsiella spp. are responsible for significant losses in important wild and cultured fish species worldwide. Recent phylogenomic investigations have determined that bacteria historically classified as Edwardsiella tarda actually represent three genetically distinct yet phenotypically ambiguous taxa with various degrees of pathogenicity in different hosts. Previous recognition of these taxa was hampered by the lack of a distinguishing phenotypic character. Commercial test panel configurations are relatively constant over time, and as new species are defined, appropriate discriminatory tests may not be present in current test panel arrangements. While phenobiochemical tests fail to discriminate between these taxa, data presented here revealed discriminatory peaks for each Edwardsiella species using matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) methodology, suggesting that MALDI-TOF can offer rapid, reliable identification in line with current systematic classifications. Furthermore, a multiplex PCR assay was validated for rapid molecular differentiation of the Edwardsiella spp. affecting fish. Moreover, the limitations of relying on partial 16S rRNA for discrimination of Edwardsiella spp. and advantages of employing alternative single-copy genes gyrB and sodB for molecular identification and classification of Edwardsiella were demonstrated. Last, sodB sequencing confirmed that isolates previously defined as typical motile fish-pathogenic E. tarda are synonymous with Edwardsiella piscicida, while atypical nonmotile fish-pathogenic E. tarda isolates are equivalent to Edwardsiella anguillarum Fish-nonpathogenic E. tarda isolates are consistent with E. tarda as it is currently defined. These analyses help deconvolute the scientific literature regarding these organisms and provide baseline information to better facilitate proper taxonomic assignment and minimize erroneous identifications of Edwardsiella isolates in clinical and research settings.
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Affiliation(s)
- Stephen R Reichley
- Thad Cochran National Warmwater Aquaculture Center, Stoneville, Mississippi, USA
- College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, USA
| | - Cynthia Ware
- Thad Cochran National Warmwater Aquaculture Center, Stoneville, Mississippi, USA
- College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, USA
| | - James Steadman
- Thad Cochran National Warmwater Aquaculture Center, Stoneville, Mississippi, USA
- College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, USA
| | - Patricia S Gaunt
- Thad Cochran National Warmwater Aquaculture Center, Stoneville, Mississippi, USA
- College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, USA
| | - Julio C García
- United States Department of Agriculture-Agricultural Research Service, Aquatic Animal Health Research Unit, Auburn, Alabama, USA
| | - Benjamin R LaFrentz
- United States Department of Agriculture-Agricultural Research Service, Aquatic Animal Health Research Unit, Auburn, Alabama, USA
| | - Anil Thachil
- Cornell University Animal Health Diagnostic Center, Ithaca, New York, USA
| | - Geoffrey C Waldbieser
- USDA-ARS Warmwater Aquaculture Research Unit, Thad Cochran National Warmwater Aquaculture Center, Stoneville, Mississippi, USA
| | - Cynthia B Stine
- Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, Maryland, USA
| | - Noemí Buján
- Departamento de Microbioloxía e Parasitoloxía, CIBUS-Facultade de Bioloxía and Instituto de Acuicultura, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, Spain
| | - Cova R Arias
- School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, Auburn, Alabama, USA
| | - Thomas Loch
- College of Veterinary Medicine, Michigan State University, East Lansing, Michigan, USA
| | - Timothy J Welch
- National Center for Cool and Cold Water Aquaculture, Kearneysville, West Virginia, USA
| | - Rocco C Cipriano
- USGS National Fish Health Research Laboratory, Kearneysville, West Virginia, USA
| | - Terrence E Greenway
- Thad Cochran National Warmwater Aquaculture Center, Stoneville, Mississippi, USA
| | - Lester H Khoo
- Thad Cochran National Warmwater Aquaculture Center, Stoneville, Mississippi, USA
- College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, USA
| | - David J Wise
- Thad Cochran National Warmwater Aquaculture Center, Stoneville, Mississippi, USA
| | - Mark L Lawrence
- College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, USA
| | - Matt J Griffin
- Thad Cochran National Warmwater Aquaculture Center, Stoneville, Mississippi, USA
- College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, USA
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34
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Wang L, Shao C, Xu W, Zhou Q, Wang N, Chen S. Proteome profiling reveals immune responses in Japanese flounder (Paralichthys olivaceus) infected with Edwardsiella tarda by iTRAQ analysis. FISH & SHELLFISH IMMUNOLOGY 2017; 66:325-333. [PMID: 28511951 DOI: 10.1016/j.fsi.2017.05.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 05/04/2017] [Accepted: 05/06/2017] [Indexed: 06/07/2023]
Abstract
The liver is an important organ for bacterial pathogen attack in fish. The differential proteomic response of the Japanese flounder liver to Edwardsiella tarda infection was examined using isobaric tags for relative and absolute quantitation (iTRAQ) labeling followed by liquid chromatography-tandem mass spectrometry (LC-MS/MS). A total of 3290 proteins were identified and classified into categories related to biological process (51.4%), molecular function (63.6%), and cellular component (57.7%). KEGG enrichment analysis indicated the complement and coagulation cascade pathways and the mineral absorption pathway were significantly enriched. Among the differentially expressed proteins, those involved in mediating complement cascade (e.g. complement component C7, C8, C9, complement factor H, complement factor Bf/C2) and mineral absorption (e.g. ferritin, STEAP-4) were most significantly upregulated during infection. Subsequently, five significantly upregulated (C4, C8beta, ferritin middle subunit, PRDX4-like and KRT18) and one significantly downregulated (transferrin) candidate immune proteins were validated by multiple reaction monitoring (MRM) assays. Furthermore, changes in expression of 15 proteins in the complement cascade and mineral absorption pathways were validated at the transcriptional level using quantitative real-time PCR (qPCR). The transcriptional levels of four transcription factors (p21Ras, Rab-31-like, NF-κB, STAT3) were also investigated by qPCR following infection with E. tarda. This study contributes to understanding the defense mechanisms of the liver in fish.
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Affiliation(s)
- Lei Wang
- Key Laboratory for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Changwei Shao
- Key Laboratory for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Wenteng Xu
- Key Laboratory for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Qian Zhou
- Key Laboratory for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Na Wang
- Key Laboratory for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Songlin Chen
- Key Laboratory for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
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35
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Liu Y, Gao Y, Liu X, Liu Q, Zhang Y, Wang Q, Xiao J. Transposon insertion sequencing reveals T4SS as the major genetic trait for conjugation transfer of multi-drug resistance pEIB202 from Edwardsiella. BMC Microbiol 2017; 17:112. [PMID: 28499353 PMCID: PMC5427535 DOI: 10.1186/s12866-017-1013-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 04/26/2017] [Indexed: 01/12/2023] Open
Abstract
Background Conjugation is a major type of horizontal transmission of genes that involves transfer of a plasmid into a recipient using specific conjugation machinery, which results in an extended spectrum of bacterial antibiotics resistance. However, there is inadequate knowledge about the regulator and mechanisms that control the conjugation processes, especially in an aquaculture environment where a cocktail of antibiotics may be present. Here, we investigated these with pEIB202, a typical multi-drug resistant IncP plasmid encoding tetracycline, streptomycin, sulfonamide and chloramphenicol resistance in fish pathogen Edwardsiella piscicida strain EIB202. Results We used transposon insertion sequencing (TIS) to identify genes that are responsible for conjugation transfer of pEIB202. All ten of the plasmid-borne type IV secretion system (T4SS) genes and a putative lipoprotein p007 were identified to play an important role in pEIB202 horizontal transfer. Antibiotics appear to modulate conjugation frequencies by repressing T4SS gene expression. In addition, we identified topA gene, which encodes topoisomerase I, as an inhibitor of pEIB202 transfer. Furthermore, the RNA-seq analysis of the response regulator EsrB encoded on the chromosome also revealed its essential role in facilitating the conjugation by upregulating the T4SS genes. Conclusions Collectively, our screens unraveled the genetic basis of the conjugation transfer of pEIB202 and the influence of horizontally acquired EsrB on this process. Our results will improve the understanding of the mechanism of plasmid conjugation processes that facilitate dissemination of antibiotic resistance especially in aquaculture industries.
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Affiliation(s)
- Yang Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Yanan Gao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Xiaohong Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China.,Shanghai Collaborative Innovation Center for Biomanufacturing, 130 Meilong Road, Shanghai, 200237, China
| | - Qin Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China.,Shanghai Collaborative Innovation Center for Biomanufacturing, 130 Meilong Road, Shanghai, 200237, China
| | - Yuanxing Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China.,Shanghai Collaborative Innovation Center for Biomanufacturing, 130 Meilong Road, Shanghai, 200237, China
| | - Qiyao Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China.,Shanghai Collaborative Innovation Center for Biomanufacturing, 130 Meilong Road, Shanghai, 200237, China
| | - Jingfan Xiao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China. .,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China. .,Shanghai Collaborative Innovation Center for Biomanufacturing, 130 Meilong Road, Shanghai, 200237, China.
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36
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Liu Y, Zhao L, Yang M, Yin K, Zhou X, Leung KY, Liu Q, Zhang Y, Wang Q. Transcriptomic dissection of the horizontally acquired response regulator EsrB reveals its global regulatory roles in the physiological adaptation and activation of T3SS and the cognate effector repertoire in Edwardsiella piscicida during infection toward turbot. Virulence 2017; 8:1355-1377. [PMID: 28441105 DOI: 10.1080/21505594.2017.1323157] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
Edwardsiella piscicida is the leading pathogen threatening worldwide aquaculture industries. The 2-component system (TCS) EsrA-EsrB is essential for the pathogenesis of this bacterium. However, little is known about the regulon and regulatory mechanism of EsrA-EsrB or about the factors that mediate the interaction of TCS with bacterial hosts. Here, our RNA-seq analysis indicated that EsrB strongly induces type III and type VI secretion systems (T3/T6SS) expression and that it modulates the expression of both physiology- and virulence-associated genes in E. piscicida grown in DMEM. EsrB binds directly to a highly conserved 18-bp DNA motif to regulate the expression of T3SS and other genes. EsrB/DMEM-activated genes include 3 known and 6 novel T3SS-dependent effectors. All these effector genes are highly induced by EsrB during the late stage of in vivo infection in fish. Furthermore, although in vivo colonization by the bacterium relies on EsrB and T3/T6SS expression, it does not require the expression of individual effectors other than EseJ. The mutant lacking these 9 effectors showed significant defects in in vivo colonization and virulence toward turbot, and, more importantly, a high level of protection against challenges by wild-type E. piscicida, suggesting that it may represent a promising live attenuated vaccine. Taken together, our data demonstrate that EsrB plays a global regulatory role in controlling physiologic responses and the expression of T3SS and its cognate effector genes. Our findings will facilitate further work on the mechanism of molecular pathogenesis of this bacterium during infection.
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Affiliation(s)
- Yang Liu
- a State Key Laboratory of Bioreactor Engineering , East China University of Science and Technology , Shanghai , China
| | - Luyao Zhao
- a State Key Laboratory of Bioreactor Engineering , East China University of Science and Technology , Shanghai , China
| | - Minjun Yang
- b Shanghai-MOST Key Laboratory of Health and Disease Genomics , Chinese National Human Genome Center at Shanghai , Shanghai , China
| | - Kaiyu Yin
- a State Key Laboratory of Bioreactor Engineering , East China University of Science and Technology , Shanghai , China
| | - Xiaohui Zhou
- c Department of Pathobiology and Veterinary Science , University of Connecticut , Storrs , CT , USA
| | - Ka Yin Leung
- a State Key Laboratory of Bioreactor Engineering , East China University of Science and Technology , Shanghai , China.,d Department of Biology , Faculty of Natural and Applied Sciences, Trinity Western University , Langley , BC , Canada
| | - Qin Liu
- a State Key Laboratory of Bioreactor Engineering , East China University of Science and Technology , Shanghai , China.,e Shanghai Engineering Research Center of Maricultured Animal Vaccines , Shanghai , China.,f Shanghai Collaborative Innovation Center for Biomanufacturing Technology , Shanghai , China
| | - Yuanxing Zhang
- a State Key Laboratory of Bioreactor Engineering , East China University of Science and Technology , Shanghai , China.,e Shanghai Engineering Research Center of Maricultured Animal Vaccines , Shanghai , China.,f Shanghai Collaborative Innovation Center for Biomanufacturing Technology , Shanghai , China
| | - Qiyao Wang
- a State Key Laboratory of Bioreactor Engineering , East China University of Science and Technology , Shanghai , China.,e Shanghai Engineering Research Center of Maricultured Animal Vaccines , Shanghai , China.,f Shanghai Collaborative Innovation Center for Biomanufacturing Technology , Shanghai , China
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37
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Abstract
Edwardsiella hoshinae is a Gram-negative facultative anaerobe that has primarily been isolated from avians and reptiles. We report here the complete and annotated genome sequence of an isolate from a monitor lizard (Varanus sp.), which contains a chromosome of 3,811,650 bp and no plasmids.
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38
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Interactome of E. piscicida and grouper liver proteins reveals strategies of bacterial infection and host immune response. Sci Rep 2017; 7:39824. [PMID: 28045121 PMCID: PMC5206647 DOI: 10.1038/srep39824] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 11/28/2016] [Indexed: 11/12/2022] Open
Abstract
The occurrence of infectious diseases is related to heterogeneous protein interactions between a host and a microbe. Therefore, elucidating the host-pathogen interplay is essential. We previously revealed the protein interactome between Edwardsiella piscicida and fish gill cells, and the present study identified the protein interactome between E. piscicida and E. drummondhayi liver cells. E. drummondhayi liver cells and bacterial pull-down approaches were used to identify E. piscicida outer membrane proteins that bind to liver cells and fish liver cell proteins that interact with bacterial cells, respectively. Eight bacterial proteins and 11 fish proteins were characterized. Heterogeneous protein-protein interactions between these bacterial cells and fish liver cells were investigated through far-Western blotting and co-immunoprecipitation. A network was constructed based on 42 heterogeneous protein-protein interactions between seven bacterial proteins and 10 fish proteins. A comparison of the new interactome with the previously reported interactome showed that four bacterial proteins overlapped, whereas all of the identified fish proteins were new, suggesting a difference between bacterial tricks for evading host immunity and the host strategy for combating bacterial infection. Furthermore, these bacterial proteins were found to regulate the expression of host innate immune-related proteins. These findings indicate that the interactome contributes to bacterial infection and host immunity.
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39
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Molina L, Geoffroy VA, Segura A, Udaondo Z, Ramos JL. Iron Uptake Analysis in a Set of Clinical Isolates of Pseudomonas putida. Front Microbiol 2016; 7:2100. [PMID: 28082966 PMCID: PMC5187384 DOI: 10.3389/fmicb.2016.02100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 12/12/2016] [Indexed: 11/13/2022] Open
Abstract
Pseudomonas putida strains are frequent inhabitants of soil and aquatic niches and they are occasionally isolated from hospital environments. As the available iron sources in human tissues, edaphic, and aquatic niches are different, we have analyzed iron-uptake related genes in different P. putida strains that were isolated from all these environments. We found that these isolates can be grouped into different clades according to the genetics of siderophore biosynthesis and recycling. The pyoverdine locus of the six P. putida clinical isolates that have so far been completely sequenced, are not closely related; three strains (P. putida HB13667, HB3267, and NBRC14164T) are grouped in Clade I and the other three in Clade II, suggesting possible different origins and evolution. In one clinical strain, P. putida HB4184, the production of siderophores is induced under high osmolarity conditions. The pyoverdine locus in this strain is closely related to that of strain P. putida HB001 which was isolated from sandy shore soil of the Yellow Sea in Korean marine sand, suggesting their possible origin, and evolution. The acquisition of two unique TonB-dependent transporters for xenosiderophore acquisition, similar to those existing in the opportunistic pathogen P. aeruginosa PAO, is an interesting adaptation trait of the clinical strain P. putida H8234 that may confer adaptive advantages under low iron availability conditions.
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Affiliation(s)
- Lázaro Molina
- Environmental Protection Department, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas Granada, Spain
| | - Valérie A Geoffroy
- Centre National de la Recherche Scientifique, UMR 7242, Université de Strasbourg, (ESBS) Illkirch, France
| | - Ana Segura
- Environmental Protection Department, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas Granada, Spain
| | - Zulema Udaondo
- Environmental Protection Department, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas Granada, Spain
| | - Juan-Luis Ramos
- Environmental Protection Department, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas Granada, Spain
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40
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Yin K, Wang Q, Xiao J, Zhang Y. Comparative proteomic analysis unravels a role for EsrB in the regulation of reactive oxygen species stress responses in Edwardsiella piscicida. FEMS Microbiol Lett 2016; 364:fnw269. [PMID: 27915248 DOI: 10.1093/femsle/fnw269] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 09/04/2016] [Accepted: 11/22/2016] [Indexed: 11/14/2022] Open
Abstract
As a leading pathogen, Edwardsiella piscicida can cause hemorrhagic septicemia in fish and gastro-intestinal infections in humans. The two-component regulatory system EsrA-EsrB plays essential roles in pathogenesis through the type III and type VI secretion systems, and hemolysin production in E. piscicida It is unclear whether other virulence- or stress response-associated genes are regulated by EsrA-EsrB. In this study, the proteomes of wild-type E. piscicida EIB202 and esrB mutant strains were compared to reveal EsrB regulon components after growth in Luria-Bertani broth (LB). Overall, the expression levels of nine genes exhibited significant changes, and five of them required the presence of EsrB, while others exhibited higher levels in the esrB mutant. The diverse functions of these proteins were identified, including amino acid metabolism, oxidative stress defense and energy production. Interestingly, superoxidase dismutase and thiol peroxidase were the most significantly down-regulated by EsrB. Furthermore, other reported reactive oxygen species (ROS) resistance-related genes were also down-regulated by EsrB as revealed by quantitative real-time. Compared with the wild-type and the complement strain esrB+, ΔesrB displayed a significantly enhanced ROS resistance. These results demonstrated that EsrB plays important roles in the ROS resistance pathway in E. piscicida grown in LB conditions.
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Affiliation(s)
- Kaiyu Yin
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Qiyao Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China.,Shanghai Collaborative Innovation Center for Biomanufacturing, Shanghai, China
| | - Jingfan Xiao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China .,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China.,Shanghai Collaborative Innovation Center for Biomanufacturing, Shanghai, China
| | - Yuanxing Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China.,Shanghai Collaborative Innovation Center for Biomanufacturing, Shanghai, China
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41
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Complete Genome Sequence of Edwardsiella piscicida Isolate S11-285 Recovered from Channel Catfish (Ictalurus punctatus) in Mississippi, USA. GENOME ANNOUNCEMENTS 2016; 4:4/6/e01259-16. [PMID: 27881536 PMCID: PMC5122678 DOI: 10.1128/genomea.01259-16] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Edwardsiella piscicida is a recently described Gram-negative facultative anaerobe and an important pathogen to many wild and cultured fish species worldwide. Here, we report the complete and annotated genome of E. piscicida isolate S11-285 recovered from channel catfish (Ictalurus punctatus), consisting of a chromosome of 3,923,603 bp and 1 plasmid.
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42
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Ucko M, Colorni A, Dubytska L, Thune RL. Edwardsiella piscicida-like pathogen in cultured grouper. DISEASES OF AQUATIC ORGANISMS 2016; 121:141-148. [PMID: 27667811 DOI: 10.3354/dao03051] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
An Edwardsiella sp. was isolated from the kidney of diseased groupers (Epinephelus aeneus and E. marginatus) cultured in Eilat (Israel, Red Sea). Affected fish presented a severe suppurative nephritis with large abscesses occasionally spreading into the surrounding musculature. Biochemical profiles and phenotypic comparisons failed to provide a clear identification to the species level, and genetic analysis of the 16S subunit failed to discriminate between Edwardsiella piscicida, E. tarda and E. ictaluri. Analysis of the gyrB gene, however, placed the grouper isolates into the E. piscicida-like group, a newly recognized taxon which also encompasses the non-motile strains previously classified as atypical E. tarda. Initial genomic analysis revealed the presence of the Edwardsiella type 3 secretion system (T3SS) but also revealed a pathogenicity island encoding a second T3SS with homology to the locus of enterocyte effacement of Escherichia coli. Further analysis revealed 3 different type 6 secretion systems that were also present in all sequenced isolates of Edwardsiella piscicida-like strains. Based on estimated DNA-DNA hybridization values and the average nucleotide index, the grouper strain fits into the E. piscicida-like phylogroup described as E. anguillarum sp. nov. The peculiarities associated with this isolate and the association of other conspecific piscine isolates from multiple marine and brackish water species suggest a link of the entire E. piscicida-like phylogroup to the marine environment.
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Affiliation(s)
- Michal Ucko
- Israel Oceanographic and Limnological Research, National Center for Mariculture, PO Box 1212, Eilat 88112, Israel
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43
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Camus A, Dill J, McDermott A, Hatcher N, Griffin M. Edwardsiella piscicida-associated septicaemia in a blotched fantail stingray Taeniura meyeni (Müeller & Henle). JOURNAL OF FISH DISEASES 2016; 39:1125-1131. [PMID: 26850591 DOI: 10.1111/jfd.12435] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 10/15/2015] [Indexed: 06/05/2023]
Affiliation(s)
- A Camus
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - J Dill
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - A McDermott
- Animal Health Department, Georgia Aquarium, Inc., Atlanta, GA, USA
| | - N Hatcher
- Animal Health Department, Georgia Aquarium, Inc., Atlanta, GA, USA
| | - M Griffin
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, MS, USA
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44
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Griffin MJ, Reichley SR, Greenway TE, Quiniou SM, Ware C, Gao DX, Gaunt PS, Yanong RPE, Pouder DB, Hawke JP, Soto E. Comparison of Edwardsiella ictaluri isolates from different hosts and geographic origins. JOURNAL OF FISH DISEASES 2016; 39:947-69. [PMID: 26661707 DOI: 10.1111/jfd.12431] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 10/04/2015] [Accepted: 10/05/2015] [Indexed: 05/04/2023]
Abstract
The intraspecific variability of E. ictaluri isolates from different origins was investigated. Isolates were recovered from farm-raised catfish (Ictalurus punctatus) in Mississippi, USA, tilapia (Oreochromis niloticus) cultured in the Western Hemisphere and zebrafish (Danio rerio) propagated in Florida, USA. These isolates were phenotypically homologous and antimicrobial profiles were largely similar. Genetically, isolates possessed differences that could be exploited by repetitive-sequence-mediated PCR and gyrB sequence, which identified three distinct E. ictaluri genotypes: one associated with catfish, one from tilapia and a third from zebrafish. Plasmid profiles were also group specific and correlated with rep-PCR and gyrB sequences. The catfish isolates possessed profiles typical of those described for E. ictaluri isolates; however, plasmids from the zebrafish and tilapia isolates differed in both composition and arrangement. Furthermore, some zebrafish and tilapia isolates were PCR negative for several E. ictaluri virulence factors. Isolates were serologically heterogenous, as serum from a channel catfish exposed to a catfish isolate had reduced antibody activity to tilapia and zebrafish isolates. This work identifies three genetically distinct strains of E. ictaluri from different origins using rep-PCR, 16S, gyrB and plasmid sequencing, in addition to antimicrobial and serological profiling.
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Affiliation(s)
- M J Griffin
- Thad Cochran National Warmwater Aquaculture Center, Mississippi State University, Stoneville, MS, USA
| | - S R Reichley
- Thad Cochran National Warmwater Aquaculture Center, Mississippi State University, Stoneville, MS, USA
| | - T E Greenway
- Thad Cochran National Warmwater Aquaculture Center, Mississippi State University, Stoneville, MS, USA
| | - S M Quiniou
- Thad Cochran National Warmwater Aquaculture Center, Warmwater Aquaculture Research Unit, Agricultural Research Service, United States Department of Agriculture, Stoneville, MS, USA
| | - C Ware
- Thad Cochran National Warmwater Aquaculture Center, Mississippi State University, Stoneville, MS, USA
| | - D X Gao
- Thad Cochran National Warmwater Aquaculture Center, Mississippi State University, Stoneville, MS, USA
| | - P S Gaunt
- Thad Cochran National Warmwater Aquaculture Center, Mississippi State University, Stoneville, MS, USA
| | - R P E Yanong
- Tropical Aquaculture Laboratory, Fisheries and Aquatic Sciences Program, School of Forest Resources and Conservation, Institute of Food and Agricultural Sciences, University of Florida, Ruskin, FL, USA
| | - D B Pouder
- Tropical Aquaculture Laboratory, Fisheries and Aquatic Sciences Program, School of Forest Resources and Conservation, Institute of Food and Agricultural Sciences, University of Florida, Ruskin, FL, USA
| | - J P Hawke
- Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
| | - E Soto
- Department of Biomedical Sciences, School of Veterinary Medicine, Ross University, Basseterre, St. Kitts, West Indies
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Suezawa C, Yasuda M, Negayama K, Kameyama T, Hirauchi M, Nakai T, Okuda J. Identification of genes associated with the penetration activity of the human type of Edwardsiella tarda EdwGII through human colon epithelial cell monolayers. Microb Pathog 2016; 95:148-156. [DOI: 10.1016/j.micpath.2016.04.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 03/28/2016] [Accepted: 04/01/2016] [Indexed: 11/27/2022]
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Castro N, Osorio CR, Buján N, Fuentes JC, Rodríguez J, Romero M, Jiménez C, Toranzo AE, Magariños B. Insights into the virulence-related genes of Edwardsiella tarda isolated from turbot in Europe: genetic homogeneity and evidence for vibrioferrin production. JOURNAL OF FISH DISEASES 2016; 39:565-576. [PMID: 26096159 DOI: 10.1111/jfd.12389] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 04/15/2015] [Accepted: 04/15/2015] [Indexed: 06/04/2023]
Abstract
Edwardsiella tarda has long been known as a pathogen that causes severe economic losses in aquaculture industry. Insights gained on E. tarda pathogenesis may prove useful in the development of new methods for the treatment of infections as well as preventive measures against future outbreaks. In this report, we have established the correlation between the presence of virulence genes, related with three aspects typically involved in bacterial pathogenesis (chondroitinase activity, quorum sensing and siderophore-mediated ferric uptake systems), in the genome of E. tarda strains isolated from turbot in Europe and their phenotypic traits. A total of 8 genes were tested by PCR for their presence in 73 E. tarda isolates. High homogeneity was observed in the presence/absence pattern of all the strains. Positive results in the amplification of virulence-related genes were correlated with the detection of chondroitinase activity in agar plates, in vivo AHL production during fish infection and determination of type of siderophore produced by E. tarda. To the best of our knowledge, this is the first study carried out with European strains on potential virulence factors. Furthermore, we demonstrated for the first time that E. tarda produces the siderophore vibrioferrin.
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Affiliation(s)
- N Castro
- Departamento de Microbiología y Parasitología, Facultad de Biología-CIBUS, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - C R Osorio
- Departamento de Microbiología y Parasitología, Instituto de Acuicultura, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - N Buján
- Departamento de Microbiología y Parasitología, Facultad de Biología-CIBUS, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - J C Fuentes
- Departamento de Química Fundamental, Facultad de Ciencias y Centro de Investigaciones de Ciencias Avanzadas (CICA), Universidad de A Coruña, A Coruña, Spain
| | - J Rodríguez
- Departamento de Química Fundamental, Facultad de Ciencias y Centro de Investigaciones de Ciencias Avanzadas (CICA), Universidad de A Coruña, A Coruña, Spain
| | - M Romero
- Departamento de Microbiología y Parasitología, Facultad de Biología-CIBUS, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - C Jiménez
- Departamento de Química Fundamental, Facultad de Ciencias y Centro de Investigaciones de Ciencias Avanzadas (CICA), Universidad de A Coruña, A Coruña, Spain
| | - A E Toranzo
- Departamento de Microbiología y Parasitología, Facultad de Biología-CIBUS, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - B Magariños
- Departamento de Microbiología y Parasitología, Facultad de Biología-CIBUS, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
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Cui S, Xiao J, Wang Q, Zhang Y. H-NS binding to evpB and evpC and repressing T6SS expression in fish pathogen Edwardsiella piscicida. Arch Microbiol 2016; 198:653-61. [PMID: 27125651 DOI: 10.1007/s00203-016-1226-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Revised: 03/11/2016] [Accepted: 04/15/2016] [Indexed: 11/30/2022]
Abstract
Edwardsiella piscicida is an important causative agent of hemorrhagic septicemia in fish and infects both cultured and wild fish species. Type VI secretion system (T6SS) was proved to play important roles in pathogenesis of E. piscicida. In this study, it was demonstrated that the expression of T6SS genes evpB and evpC was under control of the global regulator H-NS in E. piscicida and the transcriptional level of evpB and evpC was significantly down-regulated by H-NS. Compared to the wild type, the transcriptional levels of evpB and evpC were up-regulated in hns null mutant, while down-regulated in hns overexpression strain. The results of EMSA and DNase I footprinting revealed that H-NS protein directly bound to upstream region of evpC at multiple sites. A high-affinity motif with a 9-nucleotide sequence 5'-ATATAAAAT-3' was defined for H-NS preferential recognition based on the feature of the binding sites. These results indicated that H-NS acted cooperatively to form extended nucleoprotein filaments on target DNA. Site-directed mutagenesis of H-NS further showed that R86 played an essential role in T6SS gene binding. These findings highlighted the mechanisms underlying the complex regulation network of T6SS by H-NS in E. piscicida.
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Affiliation(s)
- Shilei Cui
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Jingfan Xiao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China. .,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China.
| | - Qiyao Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China.,Shanghai Collaborative Innovation Center for Biomanufacturing Technology, Shanghai, China
| | - Yuanxing Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China.,Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China.,Shanghai Collaborative Innovation Center for Biomanufacturing Technology, Shanghai, China
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Fogelson SB, Petty BD, Reichley SR, Ware C, Bowser PR, Crim MJ, Getchell RG, Sams KL, Marquis H, Griffin MJ. Histologic and molecular characterization of Edwardsiella piscicida infection in largemouth bass (Micropterus salmoides). J Vet Diagn Invest 2016; 28:338-44. [DOI: 10.1177/1040638716637639] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The genus Edwardsiella is composed of a diverse group of facultative anaerobic, gram-negative bacteria that can produce disease in a wide variety of hosts, including birds, reptiles, mammals, and fish. Our report describes the isolation and identification of Edwardsiella piscicida associated with chronic mortality events in 2 separate captive largemouth bass ( Micropterus salmoides) populations in New York and Florida. Wet-mount biopsies of skin mucus, gill, kidney, and spleen from several affected largemouth bass contained significant numbers of motile bacteria. Histologic examination revealed multifocal areas of necrosis scattered throughout the heart, liver, anterior kidney, posterior kidney, and spleen. Many of the necrotic foci were encapsulated or replaced by discrete granulomas and associated with colonies of gram-negative bacteria. Initial phenotypic and matrix-assisted laser desorption ionization–time of flight mass spectrometric analysis against existing spectral databases of recovered isolates identified these bacteria as Edwardsiella tarda. Subsequent molecular analysis using repetitive sequence mediated and species-specific PCR, as well as 16S rRNA, rpoB, and gyrB sequences, classified these isolates as E. piscicida. As a newly designated taxon, E. piscicida should be considered as a differential for multiorgan necrosis and granulomas in largemouth bass.
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Affiliation(s)
- Susan B. Fogelson
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA (Fogelson)
- North Florida Aquatic Veterinary Services, Fort White, FL (Petty)
- Thad Cochran National Warmwater Aquaculture Center, Aquatic Research and Diagnostic Laboratory, Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, MS (Reichley, Ware, Griffin)
- Aquatic Animal Health Program, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY (Bowser, Getchell, Sams, Marquis)
- IDEXX BioResearch, Columbia, MO (Crim)
| | - Barbara D. Petty
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA (Fogelson)
- North Florida Aquatic Veterinary Services, Fort White, FL (Petty)
- Thad Cochran National Warmwater Aquaculture Center, Aquatic Research and Diagnostic Laboratory, Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, MS (Reichley, Ware, Griffin)
- Aquatic Animal Health Program, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY (Bowser, Getchell, Sams, Marquis)
- IDEXX BioResearch, Columbia, MO (Crim)
| | - Stephen R. Reichley
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA (Fogelson)
- North Florida Aquatic Veterinary Services, Fort White, FL (Petty)
- Thad Cochran National Warmwater Aquaculture Center, Aquatic Research and Diagnostic Laboratory, Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, MS (Reichley, Ware, Griffin)
- Aquatic Animal Health Program, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY (Bowser, Getchell, Sams, Marquis)
- IDEXX BioResearch, Columbia, MO (Crim)
| | - Cynthia Ware
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA (Fogelson)
- North Florida Aquatic Veterinary Services, Fort White, FL (Petty)
- Thad Cochran National Warmwater Aquaculture Center, Aquatic Research and Diagnostic Laboratory, Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, MS (Reichley, Ware, Griffin)
- Aquatic Animal Health Program, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY (Bowser, Getchell, Sams, Marquis)
- IDEXX BioResearch, Columbia, MO (Crim)
| | - Paul R. Bowser
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA (Fogelson)
- North Florida Aquatic Veterinary Services, Fort White, FL (Petty)
- Thad Cochran National Warmwater Aquaculture Center, Aquatic Research and Diagnostic Laboratory, Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, MS (Reichley, Ware, Griffin)
- Aquatic Animal Health Program, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY (Bowser, Getchell, Sams, Marquis)
- IDEXX BioResearch, Columbia, MO (Crim)
| | - Marcus J. Crim
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA (Fogelson)
- North Florida Aquatic Veterinary Services, Fort White, FL (Petty)
- Thad Cochran National Warmwater Aquaculture Center, Aquatic Research and Diagnostic Laboratory, Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, MS (Reichley, Ware, Griffin)
- Aquatic Animal Health Program, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY (Bowser, Getchell, Sams, Marquis)
- IDEXX BioResearch, Columbia, MO (Crim)
| | - Rodman G. Getchell
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA (Fogelson)
- North Florida Aquatic Veterinary Services, Fort White, FL (Petty)
- Thad Cochran National Warmwater Aquaculture Center, Aquatic Research and Diagnostic Laboratory, Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, MS (Reichley, Ware, Griffin)
- Aquatic Animal Health Program, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY (Bowser, Getchell, Sams, Marquis)
- IDEXX BioResearch, Columbia, MO (Crim)
| | - Kelly L. Sams
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA (Fogelson)
- North Florida Aquatic Veterinary Services, Fort White, FL (Petty)
- Thad Cochran National Warmwater Aquaculture Center, Aquatic Research and Diagnostic Laboratory, Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, MS (Reichley, Ware, Griffin)
- Aquatic Animal Health Program, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY (Bowser, Getchell, Sams, Marquis)
- IDEXX BioResearch, Columbia, MO (Crim)
| | - Hélène Marquis
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA (Fogelson)
- North Florida Aquatic Veterinary Services, Fort White, FL (Petty)
- Thad Cochran National Warmwater Aquaculture Center, Aquatic Research and Diagnostic Laboratory, Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, MS (Reichley, Ware, Griffin)
- Aquatic Animal Health Program, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY (Bowser, Getchell, Sams, Marquis)
- IDEXX BioResearch, Columbia, MO (Crim)
| | - Matt J. Griffin
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA (Fogelson)
- North Florida Aquatic Veterinary Services, Fort White, FL (Petty)
- Thad Cochran National Warmwater Aquaculture Center, Aquatic Research and Diagnostic Laboratory, Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, MS (Reichley, Ware, Griffin)
- Aquatic Animal Health Program, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY (Bowser, Getchell, Sams, Marquis)
- IDEXX BioResearch, Columbia, MO (Crim)
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49
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Gutierrez MG, Yoder-Himes DR, Warawa JM. Comprehensive identification of virulence factors required for respiratory melioidosis using Tn-seq mutagenesis. Front Cell Infect Microbiol 2015; 5:78. [PMID: 26583079 PMCID: PMC4631991 DOI: 10.3389/fcimb.2015.00078] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 10/21/2015] [Indexed: 12/23/2022] Open
Abstract
Respiratory melioidosis is a disease presentation of the biodefense pathogen, Burkholderia pseudomallei, which is frequently associated with a lethal septicemic spread of the bacteria. We have recently developed an improved respiratory melioidosis model to study the pathogenesis of Burkholderia pseudomallei in the lung (intubation-mediated intratracheal [IMIT] inoculation), which more closely models descriptions of human melioidosis, including prominent septicemic spread from the lung and reduced involvement of the upper respiratory tract. We previously demonstrated that the Type 3 Secretion System cluster 3 (T3SS3) is a critical virulence determinant for B. pseudomallei when delivered directly into the lung. We decided to comprehensively identify all virulence determinants required for respiratory melioidosis using the Tn-seq phenotypic screen, as well as to investigate which virulence determinants are required for dissemination to the liver and spleen. While previous studies have used Tn-seq to identify essential genes for in vitro cultured B. pseudomallei, this represents the first study to use Tn-seq to identify genes required for in vivo fitness. Consistent with our previous findings, we identified T3SS3 as the largest genetic cluster required for fitness in the lung. Furthermore, we identified capsular polysaccharide and Type 6 Secretion System cluster 5 (T6SS5) as the two additional major genetic clusters facilitating respiratory melioidosis. Importantly, Tn-seq did not identify additional, novel large genetic systems supporting respiratory melioidosis, although these studies identified additional small gene clusters that may also play crucial roles in lung fitness. Interestingly, other previously identified virulence determinants do not appear to be required for lung fitness, such as lipopolysaccharide. The role of T3SS3, capsule, and T6SS5 in lung fitness was validated by competition studies, but only T3SS3 was found to be important for respiratory melioidosis when delivered as a single strain challenge, suggesting that competition studies may provide a higher resolution analysis of fitness factors in the lung. The use of Tn-seq phenotypic screening also provided key insights into the selective pressure encountered in the liver.
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Affiliation(s)
- Maria G Gutierrez
- Department of Microbiology and Immunology, University of Louisville Louisville, KY, USA
| | | | - Jonathan M Warawa
- Department of Microbiology and Immunology, University of Louisville Louisville, KY, USA ; Center for Predictive Medicine, University of Louisville Louisville, KY, USA
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50
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Seo JS, Kwon MG, Hwang JY, Jung SH, Han HJ, Kim MS, Do JW, Park MA, Kim DW, Cho WS, Lee K. Complete genome sequence and comparative genome analysis of Streptococcus parauberis KCTC11980. Genes Genomics 2015. [DOI: 10.1007/s13258-015-0325-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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