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Avendaño-Herrera R, Echeverría-Bugueño M, Hernández M, Saldivia P, Irgang R. Proteomic characterization of Tenacibaculum dicentrarchi under iron limitation reveals an upregulation of proteins related to iron oxidation and reduction metabolism, iron uptake systems and gliding motility. JOURNAL OF FISH DISEASES 2024; 47:e13984. [PMID: 38943549 DOI: 10.1111/jfd.13984] [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: 03/27/2024] [Revised: 05/29/2024] [Accepted: 06/04/2024] [Indexed: 07/01/2024]
Abstract
A strategy for vaccine design involves identifying proteins that could be involved in pathogen-host interactions. The aim of this proteomic study was to determine how iron limitation affects the protein expression of Tenacibaculum dicentrarchi, with a primary focus on virulence factors and proteins associated with iron uptake. The proteomic analysis was carried out using two strains of T. dicentrarchi grown under normal (control) and iron-limited conditions, mimicking the host environment. Our findings revealed differences in the proteins expressed by the type strain CECT 7612T and the Chilean strain TdCh05 of T. dicentrarchi. Nonetheless, both share a common response to iron deprivation, with an increased expression of proteins associated with iron oxidation and reduction metabolism (e.g., SufA, YpmQ, SufD), siderophore transport (e.g., ExbD, TonB-dependent receptor, HbpA), heme compound biosynthesis, and iron transporters under iron limitation. Proteins involved in gliding motility, such as GldL and SprE, were also upregulated in both strains. A negative differential regulation of metabolic proteins, particularly those associated with amino acid biosynthesis, was observed under iron limitation, reflecting the impact of iron availability on bacterial metabolism. Additionally, the TdCh05 strain exhibited unique proteins associated with gliding motility machinery and phage infection control compared to the type strain. These groups of proteins have been identified as virulence factors within the Flavobacteriaceae family, including the genus Tenacibaculum. These results build upon our previous report on iron acquisition mechanisms and could lay the groundwork for future studies aimed at elucidating the role of some of the described proteins in the infectious process of tenacibaculosis, as well as in the development of potential vaccines.
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Affiliation(s)
- Ruben Avendaño-Herrera
- Universidad Andrés Bello, Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Viña del Mar, Chile
- Interdisciplinary Center for Aquaculture Research (INCAR), Viña del Mar, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Universidad Andrés Bello, Quintay, Chile
| | - Macarena Echeverría-Bugueño
- Universidad Andrés Bello, Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Viña del Mar, Chile
- Interdisciplinary Center for Aquaculture Research (INCAR), Viña del Mar, Chile
| | - Mauricio Hernández
- Division of Biotechnology, Molecular Epidemiology for Life of Science Research (MELISA) Institute, San Pedro de Paz, Chile
| | - Pablo Saldivia
- Division of Biotechnology, Molecular Epidemiology for Life of Science Research (MELISA) Institute, San Pedro de Paz, Chile
| | - Rute Irgang
- Universidad Andrés Bello, Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Viña del Mar, Chile
- Interdisciplinary Center for Aquaculture Research (INCAR), Viña del Mar, Chile
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2
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Echeverría-Bugueño M, Avendaño-Herrera R. Tenacibaculum dicentrarchi produce outer membrane vesicles (OMV) that are associated with the cytotoxic effect in rainbow trout head kidney macrophages. JOURNAL OF FISH DISEASES 2024; 47:e13888. [PMID: 37950508 DOI: 10.1111/jfd.13888] [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: 07/31/2023] [Revised: 10/25/2023] [Accepted: 10/30/2023] [Indexed: 11/12/2023]
Abstract
Tenacibaculum dicentrarchi is the second most important pathogen in Chilean salmon farming. This microorganism causes severe skin lesions on the body surface of farmed fish. The bacterium can also adhere to surfaces and form biofilm, survive in fish skin mucus, and possess different systems for iron acquisition. However, the virulence mechanisms are still not fully elucidated. Outer membrane vesicles (OMV) are nanostructures released by pathogenic Gram-negative bacteria during growth, but none has been described yet for T. dicentrarchi. In this study, we provide the first reported evidence of the fish pathogen T. dicentrarchi producing and releasing OMV from 24 h after incubation, increasing thereafter until 120 h. Analyses were conducted with T. dicentrarchi TdCh05, QCR29, and the type strain CECT 7612T . The OMV sizes, determined via scanning electron microscopy, ranged from 82.25 nm to 396.88 nm as per the strain and incubation time point (i.e., 24 to 120 h). SDS-PAGE revealed that the number of protein bands evidenced a drastically downward trend among the T. dicentrarchi strains. In turn, the OMV shared five proteins (i.e., 22.2, 31.9, 47.7, 56.3, and 107.1 kDa), but no protein pattern was identical. A heterogeneous amount of protein, RNA, and DNA were obtained, depending on the time at which OMV were extracted. Purified OMV were biologically active and induced a cytotoxic effect in macrophage-enriched cell cultures from rainbow trout (Oncorhynchus mykiss) head kidneys. This is the first step towards understanding the role that OMV could play in the pathogenesis of T. dicentrarchi.
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Affiliation(s)
- Macarena Echeverría-Bugueño
- Universidad Andrés Bello, Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Viña del Mar, Chile
- Interdisciplinary Center for Aquaculture Research (INCAR), Universidad Andrés Bello, Viña del Mar, Chile
| | - Ruben Avendaño-Herrera
- Universidad Andrés Bello, Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Viña del Mar, Chile
- Interdisciplinary Center for Aquaculture Research (INCAR), Universidad Andrés Bello, Viña del Mar, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Universidad Andrés Bello, Quintay, Chile
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3
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Coca Y, Godoy M, Pontigo JP, Caro D, Maracaja-Coutinho V, Arias-Carrasco R, Rodríguez-Córdova L, de Oca MM, Sáez-Navarrete C, Burbulis I. Bacterial networks in Atlantic salmon with Piscirickettsiosis. Sci Rep 2023; 13:17321. [PMID: 37833268 PMCID: PMC10576039 DOI: 10.1038/s41598-023-43345-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 09/22/2023] [Indexed: 10/15/2023] Open
Abstract
An unbalanced composition of gut microbiota in fish is hypothesized to play a role in promoting bacterial infections, but the synergistic or antagonistic interactions between bacterial groups in relation to fish health are not well understood. We report that pathogenic species in the Piscirickettsia, Aeromonas, Renibacterium and Tenacibaculum genera were all detected in the digesta and gut mucosa of healthy Atlantic salmon without clinical signs of disease. Although Piscirickettsia salmonis (and other pathogens) occurred in greater frequencies of fish with clinical Salmonid Rickettsial Septicemia (SRS), the relative abundance was about the same as that observed in healthy fish. Remarkably, the SRS-positive fish presented with a generalized mid-gut dysbiosis and positive growth associations between Piscirickettsiaceae and members of other taxonomic families containing known pathogens. The reconstruction of metabolic phenotypes based on the bacterial networks detected in the gut and mucosa indicated the synthesis of Gram-negative virulence factors such as colanic acid and O-antigen were over-represented in SRS positive fish. This evidence indicates that cooperative interactions between organisms of different taxonomic families within localized bacterial networks might promote an opportunity for P. salmonis to cause clinical SRS in the farm environment.
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Affiliation(s)
- Yoandy Coca
- Doctorado en Ciencias de la Ingeniería, Departamento de Ingeniería Química y Bioprocesos, Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, 7820436, Santiago, Región Metropolitana, Chile
| | - Marcos Godoy
- Centro de Investigaciones Biológicas Aplicadas (CIBA), Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile.
- Laboratorio Institucional, Facultad de Ciencias de la Naturaleza, Escuela de Medicina Veterinaria, Universidad San Sebastián, Sede Patagonia, Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile.
| | - Juan Pablo Pontigo
- Laboratorio Institucional, Facultad de Ciencias de la Naturaleza, Escuela de Medicina Veterinaria, Universidad San Sebastián, Sede Patagonia, Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile
| | - Diego Caro
- Centro de Investigaciones Biológicas Aplicadas (CIBA), Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile
| | - Vinicius Maracaja-Coutinho
- Centro de Modelamiento Molecular, Biofísica y Bioinformática (CM2B2), Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Avenida Dr. Carlos Lorca Tobar 964, 8380494, Santiago, Región Metropolitana, Chile
- Beagle Bioinformatics, Santiago, Región Metropolitana, Chile
- Unidad de Genómica Avanzada, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Avenida Dr. Carlos Lorca Tobar 964, 8380494, Santiago, Región Metropolitana, Chile
| | - Raúl Arias-Carrasco
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación (PIDi), Universidad Tecnológica Metropolitana, Avenida Dieciocho 161, 8330383, Santiago, Región Metropolitana, Chile
| | - Leonardo Rodríguez-Córdova
- Facultad de Ingeniería, Escuela de Ingeniería, Universidad Santo Tomás, Avenida Ejército Libertador 146, Santiago, Región Metropolitana, Chile
| | - Marco Montes de Oca
- Centro de Investigaciones Biológicas Aplicadas (CIBA), Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile
| | - César Sáez-Navarrete
- Departamento de Ingeniería Química y Bioprocesos, Pontificia Universidad Católica de Chile, Avenida. Vicuña Mackenna 4860, 7820436, Santiago, Región Metropolitana, Chile.
- Centro de Investigación en Nanotecnología y Materiales Avanzados (CIEN-UC), Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, 7820436, Santiago, Región Metropolitana, Chile.
| | - Ian Burbulis
- Centro de Investigación Biomédica, Facultad de Medicina y Ciencia, Universidad San Sebastián, Sede Patagonia, Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile.
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Avendaño-Herrera R, Saldarriaga-Córdoba M, Echeverría-Bugueño M, Irgang R. In vitro phenotypic evidence for the utilization of iron from different sources and siderophores production in the fish pathogen Tenacibaculum dicentrarchi. JOURNAL OF FISH DISEASES 2023; 46:1001-1012. [PMID: 37309564 DOI: 10.1111/jfd.13820] [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: 03/17/2023] [Revised: 05/25/2023] [Accepted: 05/29/2023] [Indexed: 06/14/2023]
Abstract
Iron uptake during infection is an essential pathogenicity factor of several bacteria, including Tenacibaculum dicentrarchi, an emerging pathogen for salmonid and red conger eel (Genypterus chilensis) farms in Chile. Iron-related protein families were recently found in eight T. dicentrarchi genomes, but biological studies have not yet confirmed functions. The investigation reported herein clearly demonstrated for the first time that T. dicentrarchi possesses different systems for iron acquisition-one involving the synthesis of siderophores and another allowing for the utilization of heme groups. Using 38 isolates of T. dicentrarchi and the type strain CECT 7612T , all strains grew in the presence of the chelating agent 2.2'-dipyridyl (from 50 to 150 μM) and produced siderophores on chrome azurol S plates. Furthermore, 37 of the 38 T. dicentrarchi isolates used at least four of the five iron sources (i.e. ammonium iron citrate, ferrous sulfate, iron chloride hexahydrate, haemoglobin and/or hemin) when added to iron-deficient media, although the cell yield was less when using hemin. Twelve isolates grew in the presence of hemin, and 10 of them used only 100 μM. Under iron-supplemented or iron-restricted conditions, whole cells of three isolates and the type strain showed at least one membrane protein induced in iron-limiting conditions (c.a. 37.9 kDa), regardless of the isolation host. All phenotypic results were confirmed by in-silico genomic T. dicentrarchi analysis. Future studies will aim to establish a relationship between iron uptake ability and virulence in T. dicentrarchi through in vivo assays.
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Affiliation(s)
- Ruben Avendaño-Herrera
- Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Viña del Mar, Chile
- Centro FONDAP, Interdisciplinary Center for Aquaculture Research (INCAR), Universidad Andrés Bello, Viña del Mar, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Universidad Andrés Bello, Quintay, Chile
| | - Mónica Saldarriaga-Córdoba
- Centro FONDAP, Interdisciplinary Center for Aquaculture Research (INCAR), Universidad Andrés Bello, Viña del Mar, Chile
- Centro de Investigación en Recursos Naturales y Sustentabilidad, Universidad Bernardo O'Higgins, Santiago, Chile
| | - Macarena Echeverría-Bugueño
- Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Viña del Mar, Chile
- Centro FONDAP, Interdisciplinary Center for Aquaculture Research (INCAR), Universidad Andrés Bello, Viña del Mar, Chile
| | - Rute Irgang
- Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Viña del Mar, Chile
- Centro FONDAP, Interdisciplinary Center for Aquaculture Research (INCAR), Universidad Andrés Bello, Viña del Mar, Chile
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Satyam R, Ahmad S, Raza K. Comparative genomic assessment of members of genus Tenacibaculum: an exploratory study. Mol Genet Genomics 2023:10.1007/s00438-023-02031-3. [PMID: 37225902 DOI: 10.1007/s00438-023-02031-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 05/04/2023] [Indexed: 05/26/2023]
Abstract
Tenacibaculosis is an ulcerative skin disorder that affects finfish. It is caused by members of the genus Tenacibaculum, resulting in eccentric behavioural changes, including anorexia, lethargy, and abnormal swimming patterns that often result in mortality. Currently, species suspected of causing fish mortality include T. ovolyticum, T. gallaicum, T. discolor, T. finnmarkense, T. mesophilum, T. soleae, T. dicentrarchi, and T. maritimum. However, pathogenic members and the mechanisms involved in disease causation, progression, and transmission are limited due to the inadequate sequencing efforts in the past decade. In this study, we use a comparative genomics approach to investigate the characteristic features of 26 publicly available genomes of Tenacibaculum and report our observations. We propose the reclassification of "T. litoreum HSC 22" to the singaporense species and assignment of "T. sp. 4G03" to the species discolor (species with quotation marks have not been appropriately named). We also report the co-occurrence of several antimicrobial resistance/virulence genes and genes private to a few members. Finally, we mine several non-B DNA forming regions, operons, tandem repeats, high-confidence putative effector proteins, and sortase that might play a pivotal role in bacterial evolution, transcription, and pathogenesis.
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Affiliation(s)
- Rohit Satyam
- Computational Intelligence and Bioinformatics Laboratory, Department of Computer Science, Jamia Millia Islamia, New Delhi, 110025, India
| | - Shaban Ahmad
- Computational Intelligence and Bioinformatics Laboratory, Department of Computer Science, Jamia Millia Islamia, New Delhi, 110025, India
| | - Khalid Raza
- Computational Intelligence and Bioinformatics Laboratory, Department of Computer Science, Jamia Millia Islamia, New Delhi, 110025, India.
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Echeverría-Bugueño M, Irgang R, Mancilla-Schulz J, Avendaño-Herrera R. Healthy and infected Atlantic salmon (Salmo salar) skin-mucus response to Tenacibaculum dicentrarchi under in vitro conditions. FISH & SHELLFISH IMMUNOLOGY 2023; 136:108747. [PMID: 37059254 DOI: 10.1016/j.fsi.2023.108747] [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: 11/11/2022] [Revised: 04/10/2023] [Accepted: 04/12/2023] [Indexed: 06/19/2023]
Abstract
Tenacibaculosis caused by Tenacibaculum dicentrarchi is the second most important bacterial disease that affects the Chilean salmon industry. The impacted fish show severe external gross skin lesions on different areas of the body. The external mucus layer that covers fish skin contains numerous immune substances that act as one of the main defense barriers against microbial colonization and invasions by potential pathogens. The present in vitro study aimed to evaluate and elucidate the role of the external mucus layer in the susceptibility of Atlantic salmon (Salmo salar) to three Chilean T. dicentrarchi strains and the type strain. For this, mucus collected from healthy and diseased (i.e., with T. dicentrarchi) Atlantic salmon were used, and various antibacterial and inflammatory parameters were analysed. The T. dicentrarchi strains were attracted to the mucus of Atlantic salmon regardless of health status. All four strains adhered to the skin mucus and very quickly grew using the mucus nutrients. Once infection was established, different mucosal defense components were activated in the fish, but the levels of bactericidal activity and of other enzymes were insufficient to eliminate T. dicentrarchi. Alternatively, this pathogen may be able to neutralize or evade these mechanisms. Therefore, the survival of T. dicentrarchi in fish skin mucus could be relevant to facilitate the colonization and subsequent invasion of hosts. The given in vitro results suggest that greater attention should be given to fish skin mucus as a primary defense against T. dicentrarchi.
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Affiliation(s)
- Macarena Echeverría-Bugueño
- Universidad Andrés Bello, Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Viña del Mar, Chile; Interdisciplinary Center for Aquaculture Research (INCAR), Universidad Andrés Bello, Viña del Mar, Chile
| | - Rute Irgang
- Universidad Andrés Bello, Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Viña del Mar, Chile; Interdisciplinary Center for Aquaculture Research (INCAR), Universidad Andrés Bello, Viña del Mar, Chile
| | | | - Ruben Avendaño-Herrera
- Universidad Andrés Bello, Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Viña del Mar, Chile; Interdisciplinary Center for Aquaculture Research (INCAR), Universidad Andrés Bello, Viña del Mar, Chile; Centro de Investigación Marina Quintay (CIMARQ), Universidad Andrés Bello, Quintay, Chile.
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Nowlan JP, Sies AN, Britney SR, Cameron ADS, Siah A, Lumsden JS, Russell S. Genomics of Tenacibaculum Species in British Columbia, Canada. Pathogens 2023; 12:pathogens12010101. [PMID: 36678448 PMCID: PMC9864904 DOI: 10.3390/pathogens12010101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 12/30/2022] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
Tenacibaculum is a genus of Gram-negative filamentous bacteria with a cosmopolitan distribution. The research describing Tenacibaculum genomes stems primarily from Norway and Chile due to their impacts on salmon aquaculture. Canadian salmon aquaculture also experiences mortality events related to the presence of Tenacibaculum spp., yet no Canadian Tenacibaculum genomes are publicly available. Ribosomal DNA sequencing of 16S and four species-specific 16S quantitative-PCR assays were used to select isolates cultured from Atlantic salmon with mouthrot in British Columbia (BC), Canada. Ten isolates representing four known and two unknown species of Tenacibaculum were selected for shotgun whole genome sequencing using the Oxford Nanopore's MinION platform. The genome assemblies achieved closed circular chromosomes for seven isolates and long contigs for the remaining three isolates. Average nucleotide identity analysis identified T. ovolyticum, T. maritimum, T. dicentrarchi, two genomovars of T. finnmarkense, and two proposed novel species T. pacificus sp. nov. type strain 18-2881-AT and T. retecalamus sp. nov. type strain 18-3228-7BT. Annotation in most of the isolates predicted putative virulence and antimicrobial resistance genes, most-notably toxins (i.e., hemolysins), type-IX secretion systems, and oxytetracycline resistance. Comparative analysis with the T. maritimum type-strain predicted additional toxins and numerous C-terminal secretion proteins, including an M12B family metalloprotease in the T. maritimum isolates from BC. The genomic prediction of virulence-associated genes provides important targets for studies of mouthrot disease, and the annotation of the antimicrobial resistance genes provides targets for surveillance and diagnosis in veterinary medicine.
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Affiliation(s)
- Joseph P. Nowlan
- Center for Innovation in Fish Health, Vancouver Island University, Nanaimo, BC V9R 5S5, Canada
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
- Correspondence:
| | - Ashton N. Sies
- Department of Biology, University of Regina, Regina, SK S4S 0A2, Canada
- Institute for Microbial Systems and Society, Faculty of Science, University of Regina, Regina, SK S4S 0A2, Canada
| | - Scott R. Britney
- Center for Innovation in Fish Health, Vancouver Island University, Nanaimo, BC V9R 5S5, Canada
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Andrew D. S. Cameron
- Department of Biology, University of Regina, Regina, SK S4S 0A2, Canada
- Institute for Microbial Systems and Society, Faculty of Science, University of Regina, Regina, SK S4S 0A2, Canada
| | - Ahmed Siah
- BC Center for Aquatic Health Sciences, Campbell River, BC V9W 2C2, Canada
| | - John S. Lumsden
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Spencer Russell
- Center for Innovation in Fish Health, Vancouver Island University, Nanaimo, BC V9R 5S5, Canada
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Tsertou MI, Triga A, Droubogiannis S, Kokkari C, Anasi G, Katharios P. Isolation and characterization of a novel Tenacibaculum species and a corresponding bacteriophage from a Mediterranean fish hatchery: Description of Tenacibaculum larymnensis sp. nov. and Tenacibaculum phage Larrie. Front Microbiol 2023; 14:1078669. [PMID: 36925475 PMCID: PMC10013915 DOI: 10.3389/fmicb.2023.1078669] [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: 11/01/2022] [Accepted: 01/30/2023] [Indexed: 03/08/2023] Open
Abstract
Tenacibaculum larymnensis sp. nov., a novel species of the Tenacibaculum genus was isolated from a commercial fish hatchery in Greece. The novel species is phylogenetically close to T. discolor and was biochemically and genetically characterized. The genome of T. larymnensis has 3.66 Mbps length, 31.83% GC content and the genomic analysis demonstrated that it harbors a wide enzymatic repertoire suggestive of increased degrading capacity but also several virulence factors including hemolysins, secretion systems, transporters, siderophores, pili and extracellular proteins. Using the novel strain, a virulent bacteriophage designated as Tenacibaculum phage Larrie was isolated and characterized. Larrie is a novel Siphovirus with relatively large genome, 77.5 kbps with 111 ORFs, a GC content of 33.7% and an exclusively lytic lifestyle. The new phage-host system can serve as an efficient model to study microbial interactions in the aquatic environment which contribute to the nutrient cycling.
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Affiliation(s)
- Maria Ioanna Tsertou
- Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Heraklion, Greece
| | - Adriana Triga
- Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Heraklion, Greece.,Department of Biology, School of Sciences and Engineering, University of Crete, Heraklion, Greece
| | - Stavros Droubogiannis
- Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Heraklion, Greece.,Department of Biology, School of Sciences and Engineering, University of Crete, Heraklion, Greece
| | - Constantina Kokkari
- Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Heraklion, Greece
| | | | - Pantelis Katharios
- Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Heraklion, Greece
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Lopez P, Bridel S, Saulnier D, David R, Magariños B, Torres BS, Bernardet JF, Duchaud E. Genomic characterization of Tenacibaculum maritimum O-antigen gene cluster and development of a multiplex PCR-based serotyping scheme. Transbound Emerg Dis 2022; 69:e2876-e2888. [PMID: 35731505 PMCID: PMC9796276 DOI: 10.1111/tbed.14637] [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: 03/29/2022] [Revised: 05/06/2022] [Accepted: 06/17/2022] [Indexed: 01/01/2023]
Abstract
Tenacibaculum maritimum is a devastating bacterial pathogen affecting a large variety of marine fish species. It is responsible for significant economic losses in aquaculture farms worldwide. Different typing methods have been proposed to analyse bacterial diversity and population structure. Serological heterogeneity has been observed and up to four different serotypes have been described so far. However, the underlying molecular factors remain unknown. By combining conventional serotyping and genome-wide association study, we identified the genomic loci likely involved in the O-antigen biosynthesis. This finding allowed the development of a robust multiplex PCR-based serotyping scheme able to detect subgroups within each serotype and therefore performs better than conventional serotyping. This scheme was successfully applied to a large number of isolates from worldwide origin and retrieved from a large variety of fish species. No obvious correlations were observed between the mPCR-based serotype and the host species or the geographic origin of the isolates. Strikingly, the distribution of mPCR-based serotypes does not follow the core genome phylogeny. Nevertheless, this simple and cost-effective mPCR-based serotyping method could be useful for different applications such as population structure analysis, disease surveillance, vaccine formulation and efficacy follow-up.
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Affiliation(s)
- Pierre Lopez
- IfremerIRDInstitut Louis MalardéUniv Polynésie FrançaiseEIOLabex CorailTaravaoFrench Polynesia,Université Paris‐SaclayINRAEUVSQVIMJouy‐en‐JosasFrance
| | - Sébastien Bridel
- Université Paris‐SaclayINRAEUVSQVIMJouy‐en‐JosasFrance,Biodiversity and Epidemiology of Bacterial PathogensInstitut Pasteur, Université de ParisParis75015France
| | - Denis Saulnier
- IfremerIRDInstitut Louis MalardéUniv Polynésie FrançaiseEIOLabex CorailTaravaoFrench Polynesia
| | - Rarahu David
- DRM, Direction des Ressources MarinesFare Ute Immeuble Le caillPapeeteFrench Polynesia
| | - Beatriz Magariños
- Departamento de Microbiología, Facultad de Biología/CIBUSUniversidad de Santiago de CompostelaSantiago de CompostelaSpain
| | - Beatriz S. Torres
- Departamento de Microbiología, Facultad de Biología/CIBUSUniversidad de Santiago de CompostelaSantiago de CompostelaSpain
| | | | - Eric Duchaud
- Université Paris‐SaclayINRAEUVSQVIMJouy‐en‐JosasFrance
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Avendaño‐Herrera R, Olsen AB, Saldarriaga‐Cordoba M, Colquhoun DJ, Reyes V, Rivera‐Bohle J, Duchaud E, Irgang R. Isolation, identification, virulence potential, and genomic features of
Tenacibaculum piscium
isolates recovered from Chilean salmonids. Transbound Emerg Dis 2022; 69:e3305-e3315. [DOI: 10.1111/tbed.14606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 05/20/2022] [Accepted: 05/23/2022] [Indexed: 11/28/2022]
Affiliation(s)
- Ruben Avendaño‐Herrera
- Universidad Andrés Bello Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola Facultad de Ciencias de la Vida Viña del Mar Chile
- Centro FONDAP INCAR Universidad Andrés Bello Viña del Mar Chile
| | - Anne Berit Olsen
- Section of Aquatic Biosecurity Research Norwegian Veterinary Institute Bergen Norway
| | - Mónica Saldarriaga‐Cordoba
- Centro FONDAP INCAR Universidad Andrés Bello Viña del Mar Chile
- CIRENYS Universidad Bernardo O'Higgins Santiago Chile
| | | | - Víctor Reyes
- Farmacología en Aquacultura Veterinaria FAV S.A Puerto Varas Chile
| | | | - Eric Duchaud
- UMR 0892‐Virologie et Immunologie Moléculaires Université Paris‐Saclay UVSQ INRAE Jouy‐en‐Josas France
| | - Rute Irgang
- Centro FONDAP INCAR Universidad Andrés Bello Viña del Mar Chile
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11
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Irgang R, Avendaño-Herrera R. Evaluation of the in vitro susceptibility of Tenacibaculum dicentrarchi to tiamulin using minimum inhibitory concentration tests. JOURNAL OF FISH DISEASES 2022; 45:795-799. [PMID: 35262919 DOI: 10.1111/jfd.13604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 02/17/2022] [Accepted: 02/22/2022] [Indexed: 06/14/2023]
Abstract
Tenacibaculosis caused by Tenacibaculum dicentrarchi is the third most important bacterial fish infection affecting the Chilean salmon industry. Losses to this disease are most frequently controlled by treatments with florfenicol and oxytetracycline. However, recent tenacibaculosis outbreaks were controlled through the extra-label, oral administration of tiamulin, resulting in high treatment efficiency. In this study, we present an analysis of susceptibility patterns of 32 T. dicentrarchi isolates and the type strain CECT 7612T to tiamulin by determining the minimum inhibitory concentrations (MICs) according to the procedures recommended by the Clinical and Laboratory Standard Institute, but fixing incubation temperature to the more appropriate for the growth of T. dicentrarchi (18 ºC). The MICs of the T. dicentrarchi isolates were unimodally distributed (0.06-1.0 µg/ml range), while the CECT 7612T strain presented an MIC of 0.5 μg/ml. Calculations using Normalized Resistance Interpretation provided epidemiological cut-off values of ≤1.0 µg/ml, with the 33 T. dicentrarchi classified as wild type. In Chile, tiamulin is authorized for use in other livestock species, but application in salmonids is extra-label. Our presented in vitro results suggest that tiamulin is a viable alternative to florfenicol, specifically as tiamulin requires comparatively lower concentrations to inhibit T. dicentrarchi. Considering that tiamulin is also exclusively for veterinary use, is classified as "least important" by the World Health Organization and has not resulted in the development of bacterial resistance, pharmaceutical companies should be requested to register tiamulin and provide alternative antimicrobial treatments for the salmonid industry.
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Affiliation(s)
- Rute Irgang
- Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Viña del Mar, Chile
- Interdisciplinary Center for Aquaculture Research (INCAR), Viña del Mar, Chile
| | - Ruben Avendaño-Herrera
- Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Viña del Mar, Chile
- Interdisciplinary Center for Aquaculture Research (INCAR), Viña del Mar, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Universidad Andrés Bello, Quintay, Chile
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