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Li Z, Sun Y, Tan R, Gao Y. Identification, characterization and complete genome analysis of a Vibrio anguillarum isolated from Sebastes schlegelii. Microb Pathog 2024; 190:106611. [PMID: 38467165 DOI: 10.1016/j.micpath.2024.106611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 03/03/2024] [Accepted: 03/08/2024] [Indexed: 03/13/2024]
Abstract
Vibrio anguillarum is an important fish pathogen in mariculture, which can infect fish with great economic losses. In this study, a Vibrio anguillarum isolated from Sebastes schlegelii was named VA1 and was identified and characterized from aspects of morphology, physiological and biochemical characteristics, 16SRNA, virulence genes, drug sensitivity, and extracellular enzyme activity. At the same time, The VA1 was investigated at the genomic level. The results showed that a Gram-negative was isolated from the diseased fish. The VA1 was characterized with uneven surface and visible flagella wrapped in a sheath and microbubble structures. The VA1 was identified as Vibrio anguillarum based on the 16S RNA sequence and physiological and biochemical characteristics. The VA1 carried most of the virulence genes (24/29) and was resistant to penicillin, oxacillin, ampicillin, cefradine, neomycin, pipemidic acid, ofloxacin, and norfloxacin. The pathogenicity of the isolated strain was confirmed by an experimental analysis, and its LD50 was 6.43 × 106 CFU/ml. The VA1 had the ability to secrete gelatinase, protease, and amylase, and it had α-hemolysis. The whole genome size of the VA1 was 4232328bp and the G + C content was 44.95 %, consisting of two circular chromosomes, Chromosome1 and Chromosome2, with no plasmid. There were 1006 predicted protein coding sequences (CDSs). A total of 526 genes were predicted as virulence-related genes which could be classified as type IV pili, flagella, hemolysin, siderophore, and type VI secretion system. Virulence genes and correlation data were supported with the histopathological examination of the affected organs and tissues. 194 genes were predicted as antibiotic resistance genes, including fluoroquinolone antibiotic, aminoglycoside antibiotic, and beta-lactam resistant genes, which agreed with the results of the above drug sensitivity, indicating VA1 to be a multidrug-resistant bacterium. This study provided a theoretical basis for a better understanding of pathogenicity and antibiotic resistance, which might contribute to the prevention of V. anguillarum in the future.
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Affiliation(s)
- Zeyu Li
- Laboratory of Pathology and Immunology of Aquatic Animals, School of Marine Life and Fisheries, Jiangsu Ocean University, Lianyungang, 222005, China
| | - Yungui Sun
- Laboratory of Pathology and Immunology of Aquatic Animals, School of Marine Life and Fisheries, Jiangsu Ocean University, Lianyungang, 222005, China
| | - Ruiming Tan
- Laboratory of Pathology and Immunology of Aquatic Animals, School of Marine Life and Fisheries, Jiangsu Ocean University, Lianyungang, 222005, China
| | - Yingli Gao
- Laboratory of Pathology and Immunology of Aquatic Animals, School of Marine Life and Fisheries, Jiangsu Ocean University, Lianyungang, 222005, China; Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, 222005, China; Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang, 222005, China.
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Ragab W, Kawato S, Nozaki R, Kondo H, Hirono I. Comparative genome analyses of five Vibrio penaeicida strains provide insights into their virulence-related factors. Microb Genom 2022; 8. [PMID: 35171089 PMCID: PMC8942037 DOI: 10.1099/mgen.0.000766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Vibrio penaeicida (family Vibrionaceae) is an important bacterial pathogen that affects Japanese shrimp aquaculture. Only two whole-genome sequences of V. penaeicida are publicly available, which has hampered our understanding of the pathogenesis of shrimp vibriosis caused by this bacterium. To gain insight into the genetic features, evolution and pathogenicity of V. penaeicida, we sequenced five V. penaeicida strains (IFO 15640T, IFO 15641, IFO 15642, TUMSAT-OK1 and TUMSAT-OK2) and performed comparative genomic analyses. Virulence factors and mobile genetic elements were detected. Furthermore, average nucleotide identities (ANIs), clusters of orthologous groups and phylogenetic relationships were evaluated. The V. penaeicida genome consists of two circular chromosomes. Chromosome I sizes ranged from 4.1 to 4.3 Mb, the GC content ranged from 43.9 to 44.1 %, and the number of predicted protein-coding sequences (CDSs) ranged from 3620 to 3782. Chromosome II sizes ranged from 2.2 to 2.4 Mb, the GC content ranged from 43.5 to 43.8 %, and the number of predicted CDSs ranged from 1992 to 2273. All strains except IFO 15641 harboured one plasmid, having sizes that ranged from 150 to 285 kb. All five genomes had typical virulence factors, including adherence, anti-phagocytosis, flagella-related proteins and toxins (repeats-in-toxin and thermolabile haemolysin). The genomes also contained factors responsible for iron uptake and the type II, IV and VI secretion systems. The genome of strain TUMSAT-OK2 tended to encode more prophage regions than the other strains, whereas the genome of strain IFO 15640T had the highest number of regions encoding genomic islands. For comparative genome analysis, we used V. penaeicida (strain CAIM 285T) as a reference strain. ANIs between strain CAIM 285T and the five V. penaeicida strains were >95 %, which indicated that these strains belong to the same species. Orthology cluster analysis showed that strains TUMSAT-OK1 and TUMSAT-OK2 had the greatest number of shared gene clusters, followed by strains CAIM 285T and IFO 15640T. These strains were also the most closely related to each other in a phylogenetic analysis. This study presents the first comparative genome analysis of V. penaeicida and these results will be useful for understanding the pathogenesis of this bacterium.
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Affiliation(s)
- Wafaa Ragab
- Laboratory of Genome Science, Tokyo University of Marine Science and Technology, Tokyo, Japan
- Department of Bacteriology, Mycology and Immunology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Satoshi Kawato
- Laboratory of Genome Science, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Reiko Nozaki
- Laboratory of Genome Science, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Hidehiro Kondo
- Laboratory of Genome Science, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Ikuo Hirono
- Laboratory of Genome Science, Tokyo University of Marine Science and Technology, Tokyo, Japan
- *Correspondence: Ikuo Hirono,
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Gibson-Kueh S, Terence C, Chew XZ, Uichanco JA, Shen X. PCR, in-situ hybridization, and phylogenetic analysis suggest that 'big belly' disease in barramundi, Lates calcarifer (Bloch), is caused by a novel Vibrio species. J Fish Dis 2021; 44:1985-1992. [PMID: 34411310 DOI: 10.1111/jfd.13512] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 08/09/2021] [Accepted: 08/10/2021] [Indexed: 06/13/2023]
Abstract
'Big belly' disease is a chronic, granulomatous bacterial enteritis and peritonitis, first reported in 3- to 4-week-old Asian seabass or barramundi, Lates calcarifer Bloch fry. Affected fry are emaciated and have a swollen abdomen, and the condition is referred to as 'skinny pot-belly' or 'big belly' disease. In this study, histopathological examinations of diseased fish from a batch of 2-month-old, 6- to 8-cm L. calcarifer fingerlings, kept in seawater recirculating aquaculture systems, showed pathology resembling 'big belly' disease. Ethanol-fixed tissues were tested positive using specific PCR primers based on 16S rRNA genes. In situ hybridization using dioxygenin-labelled positive PCR products on formalin-fixed paraffin-embedded tissues showed positive reactions with intralesional, clusters of the large, 'big belly' coccobacilli. A phylogenetic tree constructed based on analyses of these 16S rRNA gene PCR products from five positive fish suggests that the 'big belly' bacterium is most likely a novel Vibrio species.
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Affiliation(s)
- Susan Gibson-Kueh
- Tropical Futures Institute, James Cook University, Singapore City, Singapore
| | - Celestine Terence
- Tropical Futures Institute, James Cook University, Singapore City, Singapore
| | | | | | - Xueyan Shen
- Tropical Futures Institute, James Cook University, Singapore City, Singapore
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Onohuean H, Okoh AI, Nwodo UU. Epidemiologic potentials and correlational analysis of Vibrio species and virulence toxins from water sources in greater Bushenyi districts, Uganda. Sci Rep 2021; 11:22429. [PMID: 34789791 PMCID: PMC8599681 DOI: 10.1038/s41598-021-01375-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 10/20/2021] [Indexed: 12/29/2022] Open
Abstract
Adequate water supply is one of the public health issues among the population living in low-income settings. Vibriosis remain a significant health challenge drawing the attention of both healthcare planners and researchers in South West districts of Uganda. Intending to clamp down the disease cases in the safest water deprive locality, we investigated the virulent toxins as contaminants and epidemiologic potentials of Vibrio species recovered from surface waters in greater Bushenyi districts, Uganda. Surface water sources within 46 villages located in the study districts were obtained between June and October 2018. Standard microbiological and molecular methods were used to analyse samples. Our results showed that 981 presumptive isolates retrieved cell counts of 10-100 CFU/g, with, with (640) 65% confirmed as Vibrio genus using polymerase chain reaction, which is distributed as follows; V. vulnificus 46/640 (7.2%), V. fluvialis 30/594 (5.1), V. parahaemolyticus 21/564 (3.7), V. cholera 5/543 (0.9), V. alginolyticus 62/538 (11.5) and V. mimicus 20/476 (4.2). The virulence toxins observed were heat-stable enterotoxin (stn) 46 (82.10%), V. vulnificus virulence gene (vcgCPI) 40 (87.00%), extracellular haemolysin gene {vfh 21 (70.00)} and Heme utilization protein gene {hupO 5 (16.70)}. The cluster analysis depicts hupO (4.46% n = 112); vfh (18.75%, n = 112); vcgCPI and stn (35.71%, & 41.07%, n = 112). The principal component analysis revealed the toxins (hupO, vfh) were correlated with the isolate recovered from Bohole water (BW) source, while (vcgCPI, stn) toxins are correlated with natural raw water (NRW) and open springs (OS) water sources isolates. Such observation indicates that surface waters sources are highly contaminated with an odds ratio of 1.00, 95% CI (70.48-90.5), attributed risk of (aR = 64.29) and relative risk of (RR = 73.91). In addition, it also implies that the surface waters sources have > 1 risk of contamination with vfh and > six times of contamination with hupO (aR = 40, - 66). This is a call of utmost importance to the population, which depends on these water sources to undertake appropriate sanitation, personal hygienic practices and potential measures that ensure water quality.
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Affiliation(s)
- Hope Onohuean
- SA-MRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700, South Africa.
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag 1314, Alice, 5700, Eastern Cape, South Africa.
- Biopharmaceutics Unit, Department of Pharmacology and Toxicology, School of Pharmacy, Kampala International University, Western-Campus, Ishaka-Bushenyi, Uganda.
| | - Anthony I Okoh
- SA-MRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700, South Africa
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag 1314, Alice, 5700, Eastern Cape, South Africa
| | - Uchechukwu U Nwodo
- SA-MRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700, South Africa
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag 1314, Alice, 5700, Eastern Cape, South Africa
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Li G, Xie G, Wang H, Wan X, Li X, Shi C, Wang Z, Gong M, Li T, Wang P, Zhang Q, Huang J. Characterization of a novel shrimp pathogen, Vibrio brasiliensis, isolated from Pacific white shrimp, Penaeus vannamei. J Fish Dis 2021; 44:1543-1552. [PMID: 34152602 DOI: 10.1111/jfd.13475] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 05/31/2021] [Indexed: 06/13/2023]
Abstract
A novel pathogenic strain Vibrio 20190611023 was isolated from the hepatopancreas of moribund cultured Penaeus vannamei suffering from black gill disease. This strain was identified as V. brasiliensis based on the phylogenetic analyses of 16S rDNA gene and five other housekeeping genes (i.e., gapA, ftsZ, mreB, topA and gyrB). Some biochemical features of this strain were determined with an API 20NE system, and its haemolytic activity was determined using a sheep blood agar plate. The pathogenicity of this isolate 20190611023 was confirmed by the experimental challenge tests and histopathological examinations. P. vannamei were challenged via reverse gavage with different doses of bacterial suspensions. The calculated median lethal dose (LD50 ) was (3.16 ± 1.78) × 105 CFU/g (body weight). Moreover, antibiotic susceptibility tests were performed, the results of which showed that the strain 20190611023 was sensitive to chloramphenicol, compound sulphamethoxazole, ciprofloxacin, doxycycline and oxacillin, but resistant to erythromycin, kanamycin, gentamicin, cefoperazone, ceftriaxone, cefamezin and piperacillin. To our knowledge, this is the first report for demonstrating V. brasiliensis as a shrimp pathogen, which expands the host range of V. brasiliensis infection. The present study highlights that more attention should be paid to this novel pathogen in intensive shrimp aquaculture.
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Affiliation(s)
- Ge Li
- School of Marine Science and Fisheries, Jiangsu Ocean University, Lianyungang, China
- Key Laboratory of Marine Aquaculture Disease Control, Ministry of Agriculture, Key Laboratory of Marine Aquaculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Guosi Xie
- Key Laboratory of Marine Aquaculture Disease Control, Ministry of Agriculture, Key Laboratory of Marine Aquaculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Hailiang Wang
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Xiaoyuan Wan
- Key Laboratory of Marine Aquaculture Disease Control, Ministry of Agriculture, Key Laboratory of Marine Aquaculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Xinshu Li
- School of Marine Science and Fisheries, Jiangsu Ocean University, Lianyungang, China
| | - Chengyin Shi
- Key Laboratory of Marine Aquaculture Disease Control, Ministry of Agriculture, Key Laboratory of Marine Aquaculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Ziyan Wang
- Key Laboratory of Marine Aquaculture Disease Control, Ministry of Agriculture, Key Laboratory of Marine Aquaculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Miao Gong
- Key Laboratory of Marine Aquaculture Disease Control, Ministry of Agriculture, Key Laboratory of Marine Aquaculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Ting Li
- Hainan Zhongzheng Aquatic Science and Technology Co., Ltd, Dongfang, China
| | - Ping Wang
- Hainan Zhongzheng Aquatic Science and Technology Co., Ltd, Dongfang, China
| | - Qingli Zhang
- Key Laboratory of Marine Aquaculture Disease Control, Ministry of Agriculture, Key Laboratory of Marine Aquaculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Jie Huang
- Key Laboratory of Marine Aquaculture Disease Control, Ministry of Agriculture, Key Laboratory of Marine Aquaculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
- Network of Aquaculture Centres in Asia-Pacific, Bangkok, Thailand
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6
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Islam MT, Nasreen T, Kirchberger PC, Liang KYH, Orata FD, Johura FT, Hussain NAS, Im MS, Tarr CL, Alam M, Boucher YF. Population Analysis of Vibrio cholerae in Aquatic Reservoirs Reveals a Novel Sister Species ( Vibrio paracholerae sp. nov.) with a History of Association with Humans. Appl Environ Microbiol 2021; 87:e0042221. [PMID: 34132593 PMCID: PMC8357300 DOI: 10.1128/aem.00422-21] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 06/04/2021] [Indexed: 12/12/2022] Open
Abstract
Most efforts to understand the biology of Vibrio cholerae have focused on a single group, the pandemic-generating lineage harboring the strains responsible for all known cholera pandemics. Consequently, little is known about the diversity of this species in its native aquatic environment. To understand the differences in the V. cholerae populations inhabiting regions with a history of cholera cases and those lacking such a history, a comparative analysis of population composition was performed. Little overlap was found in lineage compositions between those in Dhaka, Bangladesh (where cholera is endemic), located in the Ganges Delta, and those in Falmouth, MA (no known history of cholera), a small coastal town on the United States east coast. The most striking difference was the presence of a group of related lineages at high abundance in Dhaka, which was completely absent from Falmouth. Phylogenomic analysis revealed that these lineages form a cluster at the base of the phylogeny for the V. cholerae species and were sufficiently differentiated genetically and phenotypically to form a novel species. A retrospective search revealed that strains from this species have been anecdotally found from around the world and were isolated as early as 1916 from a British soldier in Egypt suffering from choleraic diarrhea. In 1935, Gardner and Venkatraman unofficially referred to a member of this group as Vibrio paracholerae. In recognition of this earlier designation, we propose the name Vibrio paracholerae sp. nov. for this bacterium. Genomic analysis suggests a link with human populations for this novel species and substantial interaction with its better-known sister species. IMPORTANCE Cholera continues to remain a major public health threat around the globe. Understanding the ecology, evolution, and environmental adaptation of the causative agent (Vibrio cholerae) and tracking the emergence of novel lineages with pathogenic potential are essential to combat the problem. In this study, we investigated the population dynamics of Vibrio cholerae in an inland locality, which is known as endemic for cholera, and compared them with those of a cholera-free coastal location. We found the consistent presence of the pandemic-generating lineage of V. cholerae in Dhaka, where cholera is endemic, and an exclusive presence of a lineage phylogenetically distinct from other V. cholerae lineages. Our study suggests that this lineage represents a novel species that has pathogenic potential and a human link to its environmental abundance. The possible association with human populations and coexistence and interaction with toxigenic V. cholerae in the natural environment make this potential human pathogen an important subject for future studies.
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Affiliation(s)
| | - Tania Nasreen
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Paul C. Kirchberger
- Department of Integrative Biology, University of Texas at Austin, Austin, Texas, USA
| | - Kevin Y. H. Liang
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Fabini D. Orata
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Fatema-Tuz Johura
- Infectious Diseases Division, International Centre for Diarrheal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - Nora A. S. Hussain
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Monica S. Im
- National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Cheryl L. Tarr
- National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Munirul Alam
- Infectious Diseases Division, International Centre for Diarrheal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - Yann F. Boucher
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore
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Garcia C, Mesnil A, Tourbiez D, Moussa M, Dubreuil C, Gonçalves de Sa A, Chollet B, Godfrin Y, Dégremont L, Serpin D, Travers MA. Vibrio aestuarianus subsp. cardii subsp. nov., pathogenic to the edible cockles Cerastoderma edule in France, and establishment of Vibrio aestuarianus subsp. aestuarianus subsp. nov. and Vibrio aestuarianus subsp. francensis subsp. nov. Int J Syst Evol Microbiol 2021; 71:004654. [PMID: 33507857 PMCID: PMC8346768 DOI: 10.1099/ijsem.0.004654] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 12/24/2020] [Indexed: 11/28/2022] Open
Abstract
Cockle mortality events have been reported in northern France since 2012. In the present study, we describe and investigate the implication of a potential bacterial causative agent in cockle mortality. Bacteria isolated from five different cockle mortality events were characterized and studied. Using phenotypic analysis combined with DNA-DNA hybridization (DDH) and whole genome sequencing, the isolates were shown to belong to Vibrio aestuarianus, a species regularly detected in France during oyster mortality events. Comparison of the strains from cockles with strains from French oysters and the type strain showed that the strains from cockles were genetically different to those from oysters and also different to the V. aestuarianus type strain. Moreover, the cockle and oyster strains were classified into two different, but close, groups both separated from the type strain by: (1) analyses of the ldh gene sequences; (2) DDH assays between 12/122 3T3T (LMG 31436T=DSM 109723T), a representative cockle strain, 02/041T (CIP 109791T=LMG 24517T) representative oyster strain and V. aestuarianus type strain LMG 7909T; (3) average nucleotide identity values calculated on the genomes; and (4) phenotypic traits. Finally, results of MALDI-TOF analyses also revealed specific peaks discriminating the three representative strains. The toxicity of representative strains of these cockle isolates was demonstrated by experimental infection of hatchery-produced cockles. The data therefore allow us to propose two novel subspecies of Vibrio aestuarianus: Vibrio aestuarianus subsp. cardii subsp. nov. for the cockle strains and Vibrio aestuarianus subsp. francensis subsp. nov. for the Pacific oyster strains, in addition to an emended description of the species Vibrio aestuarianus.
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Affiliation(s)
- Céline Garcia
- Ifremer, SG2M-LGPMM, Laboratoire de Génétique et Pathologie des Mollusques Marins, 17390 La Tremblade, France
| | - Aurélie Mesnil
- Ifremer, SG2M-LGPMM, Laboratoire de Génétique et Pathologie des Mollusques Marins, 17390 La Tremblade, France
- IHPE, Univ. Montpellier, CNRS, Ifremer, Univ. Perpignan Via Domitia, 34090 Montpellier, France
| | - Delphine Tourbiez
- Ifremer, SG2M-LGPMM, Laboratoire de Génétique et Pathologie des Mollusques Marins, 17390 La Tremblade, France
| | - Mirna Moussa
- Ifremer, SG2M-LGPMM, Laboratoire de Génétique et Pathologie des Mollusques Marins, 17390 La Tremblade, France
| | - Christine Dubreuil
- Ifremer, SG2M-LGPMM, Laboratoire de Génétique et Pathologie des Mollusques Marins, 17390 La Tremblade, France
| | - Amélie Gonçalves de Sa
- Ifremer, SG2M-LGPMM, Laboratoire de Génétique et Pathologie des Mollusques Marins, 17390 La Tremblade, France
| | - Bruno Chollet
- Ifremer, SG2M-LGPMM, Laboratoire de Génétique et Pathologie des Mollusques Marins, 17390 La Tremblade, France
| | - Yoann Godfrin
- Ifremer, SG2M-LGPMM, Laboratoire de Génétique et Pathologie des Mollusques Marins, 17390 La Tremblade, France
| | - Lionel Dégremont
- Ifremer, SG2M-LGPMM, Laboratoire de Génétique et Pathologie des Mollusques Marins, 17390 La Tremblade, France
| | - Delphine Serpin
- Ifremer, SG2M-LGPMM, Laboratoire de Génétique et Pathologie des Mollusques Marins, 17390 La Tremblade, France
| | - Marie-Agnès Travers
- Ifremer, SG2M-LGPMM, Laboratoire de Génétique et Pathologie des Mollusques Marins, 17390 La Tremblade, France
- IHPE, Univ. Montpellier, CNRS, Ifremer, Univ. Perpignan Via Domitia, 34090 Montpellier, France
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Bauer J, Teitge F, Neffe L, Adamek M, Jung A, Peppler C, Steinhagen D, Jung-Schroers V. Impact of a reduced water salinity on the composition of Vibrio spp. in recirculating aquaculture systems for Pacific white shrimp (Litopenaeus vannamei) and its possible risks for shrimp health and food safety. J Fish Dis 2021; 44:89-105. [PMID: 32971569 DOI: 10.1111/jfd.13270] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/25/2020] [Accepted: 08/27/2020] [Indexed: 05/27/2023]
Abstract
Tropical shrimp, like Litopenaeus vannamei, in land-based recirculating aquaculture systems (RAS) are often kept at low water salinities to reduce costs for artificial sea salt and the amount of salty wastewater. Although these shrimp are tolerant against low salinities, innate immunity suppression and changes in the microbial composition in the water can occur. As especially Vibrio spp. are relevant for shrimp health, alterations in the species composition of the Vibrio community were analysed in water from six RAS, run at 15‰ or 30‰. Additionally, pathogenicity factors including pirA/B, VPI, toxR, toxS, vhh, vfh, tdh, trh, flagellin genes and T6SS1/2 of V. parahaemolyticus were analysed. The Vibrio composition differed significantly depending on water salinity. In RAS at 15‰, higher numbers of the potentially pathogenic species V. parahaemolyticus, V. owensii and V. campbellii were detected, and especially in V. parahaemolyticus, various pathogenicity factors were present. A reduced salinity may therefore pose a higher risk of disease outbreaks in shrimp RAS. Because some of the detected pathogenicity factors are relevant for human health, this might also affect food safety. In order to produce healthy shrimp as a safe food for human consumption, maintaining high water salinities seems to be recommendable.
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Affiliation(s)
- Julia Bauer
- Fish Disease Research Unit, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Felix Teitge
- Fish Disease Research Unit, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Lisa Neffe
- Fish Disease Research Unit, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Mikolaj Adamek
- Fish Disease Research Unit, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Arne Jung
- Clinic for Poultry, University of Veterinary Medicine Hannover, Hannover, Germany
| | | | - Dieter Steinhagen
- Fish Disease Research Unit, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Verena Jung-Schroers
- Fish Disease Research Unit, University of Veterinary Medicine Hannover, Hannover, Germany
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Špačková M, Košťálová J, Fabiánová K. Non-O1/non-O139 vibrios - occurrence not only in Europe in recent years. Epidemiol Mikrobiol Imunol 2021; 70:131-138. [PMID: 34412489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Non-O1/non-O139 vibrios refer to all vibrios except toxin producing Vibrio cholerae serogroups O1 and O139. The prevalence of illness caused by non-O1/non-O139 vibrios steadily increases all over the world in the last 20 years, which is very probably related to global warming. These infections are reported year-round from tropical and subtropical climate zones, but they were also detected in the mild climate zone of the United States of America and Europe. In mild climate, they have markedly seasonal occurrence, typically peaking in May to October. A human can be infected after ingestion of contaminated food, especially seafood and fish, or water or while bathing. In Europe, non-O1/non-O139 vibrios were detected in the Baltic Sea, North Sea and Mediterranean Sea but also in ponds and rivers. Depending on the pathogen entry route, the clinical manifestation may appear as gastroenteritis, otitis, wound infection or severe up to fatal illness, predominantly in immunocompromised patients. There is no specific prevention. Non-specific prevention includes good personal and food handling hygiene practices and avoiding contact of unhealed wounds with sea or surface swimming water. Given the severity and increasing frequency of infections caused by non-O1/non-O139 vibrios, they should be considered in differential diagnosis of gastrointestinal and wound infections, especially in patients with a history of consumption of fish and seafood or with a history of contact of unhealed wounds with sea or other open swimming water.
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Abstract
Vibrio is a large and diverse genus of bacteria, of which most are nonpathogenic species found in the aquatic environment. However, a subset of the Vibrio genus includes several species that are highly pathogenic, either to humans or to aquatic animals. In recent years, Danio rerio, commonly known as the zebrafish, has emerged as a major animal model used for studying nearly every aspect of biology, including infectious diseases. Zebrafish are especially useful because the embryos are transparent, larvae are small and facilitate imaging studies, and numerous transgenic fish strains have been constructed. Zebrafish models for several pathogenic Vibrio species have been described, and indeed a fish model is highly relevant for the study of aquatic bacterial pathogens. Here, we summarize the zebrafish models that have been used to study pathogenic Vibrio species to date.
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Affiliation(s)
- Dhrubajyoti Nag
- Department of Biochemistry, Microbiology, and Immunology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Dustin A Farr
- Department of Biochemistry, Microbiology, and Immunology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Madison G Walton
- Department of Biochemistry, Microbiology, and Immunology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Jeffrey H Withey
- Department of Biochemistry, Microbiology, and Immunology, Wayne State University School of Medicine, Detroit, Michigan, USA
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Azevedo GPR, Mattsson HK, Lopes GR, Vidal L, Campeão M, Tonon LAC, Garcia GD, Tschoeke DA, Silva BS, Otsuki K, Gomez-Gil B, Swings J, Thompson FL, Thompson CC. Vibrio tetraodonis sp. nov.: genomic insights on the secondary metabolites repertoire. Arch Microbiol 2020; 203:399-404. [PMID: 32844278 DOI: 10.1007/s00203-020-02019-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 07/30/2020] [Accepted: 08/08/2020] [Indexed: 11/26/2022]
Abstract
Description of a Gram-negative, motile, circular-shaped bacterial strain, designated A511T obtained from the skin of the pufferfish Sphoeroides spengleri (Family Tetraodontidae), collected in Arraial do Cabo, Brazil. Optimum growth occurs at 20-28 °C in the presence of 3% NaCl. The genome sequence of the novel isolate consisted of 4.36 Mb, 3,976 coding genes and G + C content of 42.5%. Genomic taxonomy analyses based on average amino acid (AAI), genome-to-genome-distance (GGDH) and phylogenetic reconstruction placed A511T (= CBAS 712T = CAIM 1939T) into a new species of the genus Vibrio (Vibrio tetraodonis sp. nov.). The genome of the novel species contains eight genes clusters (~ 183.9 Kbp in total) coding for different types of bioactive compounds that hint to several possible ecological roles in the pufferfish host.
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Affiliation(s)
- Gustavo P R Azevedo
- Institute of Biology and SAGE-COPPE, Federal University of Rio de Janeiro, Avenida Carlos Chagas Fo, s/n, Bloco A, Ilha do Fundão, Rio de Janeiro, RJ, CEP 21941-590, Brazil.
| | - Hannah K Mattsson
- Institute of Biology and SAGE-COPPE, Federal University of Rio de Janeiro, Avenida Carlos Chagas Fo, s/n, Bloco A, Ilha do Fundão, Rio de Janeiro, RJ, CEP 21941-590, Brazil
| | - Grasiele R Lopes
- Institute of Biology and SAGE-COPPE, Federal University of Rio de Janeiro, Avenida Carlos Chagas Fo, s/n, Bloco A, Ilha do Fundão, Rio de Janeiro, RJ, CEP 21941-590, Brazil
| | - Livia Vidal
- Institute of Biology and SAGE-COPPE, Federal University of Rio de Janeiro, Avenida Carlos Chagas Fo, s/n, Bloco A, Ilha do Fundão, Rio de Janeiro, RJ, CEP 21941-590, Brazil
| | - Mariana Campeão
- Institute of Biology and SAGE-COPPE, Federal University of Rio de Janeiro, Avenida Carlos Chagas Fo, s/n, Bloco A, Ilha do Fundão, Rio de Janeiro, RJ, CEP 21941-590, Brazil
| | - Luciane A Chimetto Tonon
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, São Carlos, SP, CEP 13560-970, Brazil
| | - Gizele D Garcia
- Institute of Biology and SAGE-COPPE, Federal University of Rio de Janeiro, Avenida Carlos Chagas Fo, s/n, Bloco A, Ilha do Fundão, Rio de Janeiro, RJ, CEP 21941-590, Brazil
- Institute of Microbiology, Federal University of Rio de Janeiro, Macaé, RJ, Brazil
| | - Diogo A Tschoeke
- Institute of Biology and SAGE-COPPE, Federal University of Rio de Janeiro, Avenida Carlos Chagas Fo, s/n, Bloco A, Ilha do Fundão, Rio de Janeiro, RJ, CEP 21941-590, Brazil
| | - Bruno S Silva
- Institute of Biology and SAGE-COPPE, Federal University of Rio de Janeiro, Avenida Carlos Chagas Fo, s/n, Bloco A, Ilha do Fundão, Rio de Janeiro, RJ, CEP 21941-590, Brazil
| | - Koko Otsuki
- Institute of Biology and SAGE-COPPE, Federal University of Rio de Janeiro, Avenida Carlos Chagas Fo, s/n, Bloco A, Ilha do Fundão, Rio de Janeiro, RJ, CEP 21941-590, Brazil
| | - Bruno Gomez-Gil
- CIAD, AC. Mazatlan Unit for Aquaculture, AP 711, 82000, Mazatlan, Sinaloa, Mexico
| | - Jean Swings
- Institute of Biology and SAGE-COPPE, Federal University of Rio de Janeiro, Avenida Carlos Chagas Fo, s/n, Bloco A, Ilha do Fundão, Rio de Janeiro, RJ, CEP 21941-590, Brazil
| | - Fabiano L Thompson
- Institute of Biology and SAGE-COPPE, Federal University of Rio de Janeiro, Avenida Carlos Chagas Fo, s/n, Bloco A, Ilha do Fundão, Rio de Janeiro, RJ, CEP 21941-590, Brazil
| | - Cristiane C Thompson
- Institute of Biology and SAGE-COPPE, Federal University of Rio de Janeiro, Avenida Carlos Chagas Fo, s/n, Bloco A, Ilha do Fundão, Rio de Janeiro, RJ, CEP 21941-590, Brazil.
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Geng YH, He XY, Li N, Li J, Gu TJ, Sun XM, Song XY, Chen XL, Zhang YZ, Qin QL, Zhang XY. Vibrio algicola sp. nov., isolated from the surface of coralline algae. Int J Syst Evol Microbiol 2020; 70:5149-5155. [PMID: 32812859 DOI: 10.1099/ijsem.0.004394] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-stain-negative, oxidase- and catalase-positive, facultative anaerobic and rod-shaped bacterium, designated strain SM1977T, was isolated from the surface of coralline algae collected from the intertidal zone at Qingdao, PR China. The strain grew at 10-35 °C, pH 4.5-8.5 and with 1-8.5% (w/v) NaCl. It reduced nitrate to nitrite and hydrolysed Tween 20 and DNA. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain SM1977T was affiliated with the genus Vibrio, having the highest sequence similarity (97.6 %) to the type strain of Vibrio casei, followed by those of another five species (95.6-97.6 %) in the Rumoiensis clade of the genus Vibrio. However, the in silico DNA-DNA hybridization (75.3-75.9 %) and average nucleotide identity (21.6-22.8 %) values of SM1977T against these close relatives were all below the corresponding thresholds to discriminate bacterial species. The major fatty acids were summed feature 3 (C16:1 ω7c and/or C16:1 ω6c), C16:0 and summed feature 8 (C18:1 ω6c and /or C18:1 ω7c). The predominant polar lipids were phosphatidylethanolamine, diphosphatidylglycerol and phosphatidylglycerol. The sole respiratory quinone was Q-8. The genomic DNA G+C content of strain SM1977T, determined from the obtained whole genomic sequence, was 42.3 mol%. On the basis of the polyphasic results obtained in this study, strain SM1977T is considered to represent a novel species within the genus Vibrio, for which the name Vibrio algicola sp. nov. is proposed. The type strain is SM1977T (=MCCC 1K04351T=KCTC 72847T).
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Affiliation(s)
- Yu-Hui Geng
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, PR China
| | - Xiao-Yan He
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, PR China
| | - Na Li
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, PR China
| | - Jian Li
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, PR China
| | - Tie-Ji Gu
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, PR China
| | - Xiao-Meng Sun
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, PR China
| | - Xiao-Yan Song
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, PR China
| | - Xiu-Lan Chen
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, PR China
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, PR China
| | - Yu-Zhong Zhang
- College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266003, PR China
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, PR China
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, PR China
| | - Qi-Long Qin
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, PR China
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, PR China
| | - Xi-Ying Zhang
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, PR China
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, PR China
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Poirier I, Benhaïm D, Poizot E, Gallon RK, Cauvin E, Lemarchand A, Bertrand M, Lelièvre C, Murat A, Benoit F, Méar Y. Marine aggregates in North Atlantic coast: Microbial characteristics and potential interactions with farmed Atlantic salmon (Salmo salar). Mar Environ Res 2020; 157:104864. [PMID: 32275501 DOI: 10.1016/j.marenvres.2019.104864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 12/10/2019] [Accepted: 12/14/2019] [Indexed: 06/11/2023]
Abstract
Microbial contamination of aggregates collected near an Atlantic salmon farm, in the Cherbourg roadstead, was followed monthly over one year to study the dynamics of Vibrio spp. and explore their impact on farmed fish. Salmon state of health was followed through blood and histopathological analyses. Vibrio were systematically found in aggregates with particularly high concentration in August. The Splendidus clade was strongly dominant in aggregates as well as in gills, and an increase in Vibrio diversity was observed in summer and autumn. Results did not demonstrate that aggregates directly impact the bacterial community of gills, but they suggested an aggregates-gills interaction. Gill contamination was correlated with water temperature and probably impacted by amoebae. Vibrio renipiscarius and Vibrio toranzoniae were isolated in North Atlantic for the first time. A better understanding of the interaction between marine aggregates, Vibrio spp. and fish is essential to improve salmon cage farming.
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Affiliation(s)
- Isabelle Poirier
- Conservatoire National des Arts et Métiers, Institut National des Sciences et Techniques de la Mer, EPN8, Boulevard Collignon, Tourlaville, 50110, Cherbourg en Cotentin, France; Laboratoire Universitaire des Sciences Appliquées de Cherbourg, EA4253, Normandie Université, UNICAEN, 50130, Cherbourg en Cotentin, France.
| | - David Benhaïm
- Hólar University, Department of Aquaculture and Fish Biology, Háeyri 1, 550 Saudárkrókur, Iceland; Conservatoire National des Arts et Métiers, Institut National des Sciences et Techniques de la Mer, EPN8, Boulevard Collignon, Tourlaville, 50110, Cherbourg en Cotentin, France; Laboratoire Universitaire des Sciences Appliquées de Cherbourg, EA4253, Normandie Université, UNICAEN, 50130, Cherbourg en Cotentin, France.
| | - Emmanuel Poizot
- Conservatoire National des Arts et Métiers, Institut National des Sciences et Techniques de la Mer, EPN8, Boulevard Collignon, Tourlaville, 50110, Cherbourg en Cotentin, France; Laboratoire Universitaire des Sciences Appliquées de Cherbourg, EA4253, Normandie Université, UNICAEN, 50130, Cherbourg en Cotentin, France.
| | - Régis Kévin Gallon
- Conservatoire National des Arts et Métiers, Institut National des Sciences et Techniques de la Mer, EPN8, Boulevard Collignon, Tourlaville, 50110, Cherbourg en Cotentin, France; Laboratoire Universitaire des Sciences Appliquées de Cherbourg, EA4253, Normandie Université, UNICAEN, 50130, Cherbourg en Cotentin, France.
| | - Elodie Cauvin
- LABÉO MANCHE, 1352 avenue de Paris, CS 33608, 50008, Saint-Lô, France.
| | - Alexis Lemarchand
- GMG, ZA Produimer, Rue Port des Flamands, 50110, Cherbourg en Cotentin, France.
| | - Martine Bertrand
- Conservatoire National des Arts et Métiers, Institut National des Sciences et Techniques de la Mer, EPN8, Boulevard Collignon, Tourlaville, 50110, Cherbourg en Cotentin, France; Laboratoire Universitaire des Sciences Appliquées de Cherbourg, EA4253, Normandie Université, UNICAEN, 50130, Cherbourg en Cotentin, France.
| | - Céline Lelièvre
- Laboratoire Universitaire des Sciences Appliquées de Cherbourg, EA4253, Normandie Université, UNICAEN, 50130, Cherbourg en Cotentin, France.
| | - Anne Murat
- Conservatoire National des Arts et Métiers, Institut National des Sciences et Techniques de la Mer, EPN8, Boulevard Collignon, Tourlaville, 50110, Cherbourg en Cotentin, France; Laboratoire Universitaire des Sciences Appliquées de Cherbourg, EA4253, Normandie Université, UNICAEN, 50130, Cherbourg en Cotentin, France.
| | - Fabienne Benoit
- LABÉO MANCHE, 1352 avenue de Paris, CS 33608, 50008, Saint-Lô, France.
| | - Yann Méar
- Conservatoire National des Arts et Métiers, Institut National des Sciences et Techniques de la Mer, EPN8, Boulevard Collignon, Tourlaville, 50110, Cherbourg en Cotentin, France; Laboratoire Universitaire des Sciences Appliquées de Cherbourg, EA4253, Normandie Université, UNICAEN, 50130, Cherbourg en Cotentin, France.
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Deng Y, Xu H, Su Y, Liu S, Xu L, Guo Z, Wu J, Cheng C, Feng J. Horizontal gene transfer contributes to virulence and antibiotic resistance of Vibrio harveyi 345 based on complete genome sequence analysis. BMC Genomics 2019; 20:761. [PMID: 31640552 PMCID: PMC6805501 DOI: 10.1186/s12864-019-6137-8] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 09/24/2019] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Horizontal gene transfer (HGT), which is affected by environmental pollution and climate change, promotes genetic communication, changing bacterial pathogenicity and drug resistance. However, few studies have been conducted on the effect of HGT on the high pathogenicity and drug resistance of the opportunistic pathogen Vibrio harveyi. RESULTS V. harveyi 345 that was multidrug resistant and infected Epinephelus oanceolutus was isolated from a diseased organism in Shenzhen, Southern China, an important and contaminated aquaculture area. Analysis of the entire genome sequence predicted 5678 genes including 487 virulence genes contributing to bacterial pathogenesis and 25 antibiotic-resistance genes (ARGs) contributing to antimicrobial resistance. Five ARGs (tetm, tetb, qnrs, dfra17, and sul2) and one virulence gene (CU052_28670) on the pAQU-type plasmid p345-185, provided direct evidence for HGT. Comparative genome analysis of 31 V. harveyi strains indicated that 217 genes and 7 gene families, including a class C beta-lactamase gene, a virulence-associated protein D gene, and an OmpA family protein gene were specific to strain V. harveyi 345. These genes could contribute to HGT or be horizontally transferred from other bacteria to enhance the virulence or antibiotic resistance of 345. Mobile genetic elements in 71 genomic islands encoding virulence factors for three type III secretion proteins and 13 type VI secretion system proteins, and two incomplete prophage sequences were detected that could be HGT transfer tools. Evaluation of the complete genome of V. harveyi 345 and comparative genomics indicated genomic exchange, especially exchange of pathogenic genes and drug-resistance genes by HGT contributing to pathogenicity and drug resistance. Climate change and continued environmental deterioration are expected to accelerate the HGT of V. harveyi, increasing its pathogenicity and drug resistance. CONCLUSION This study provides timely information for further analysis of V. harveyi pathogenesis and antimicrobial resistance and developing pollution control measurements for coastal areas.
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Affiliation(s)
- Yiqin Deng
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China
- Tropical Aquaculture Research and Development Centre, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Hainan, 572426, China
| | - Haidong Xu
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China
| | - Youlu Su
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China
| | - Songlin Liu
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Liwen Xu
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China
| | - Zhixun Guo
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China
| | - Jinjun Wu
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China
- Tropical Aquaculture Research and Development Centre, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Hainan, 572426, China
| | - Changhong Cheng
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China
| | - Juan Feng
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China.
- Tropical Aquaculture Research and Development Centre, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Hainan, 572426, China.
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Lv Z, Wang L, Jia Z, Sun J, Wang W, Liu Z, Qiu L, Wang M, Song L. Hemolymph C1qDC promotes the phagocytosis of oyster Crassostrea gigas hemocytes by interacting with the membrane receptor β-integrin. Dev Comp Immunol 2019; 98:42-53. [PMID: 30995452 DOI: 10.1016/j.dci.2019.04.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 04/08/2019] [Accepted: 04/09/2019] [Indexed: 06/09/2023]
Abstract
Phagocytosis constitutes a conserved cellular process for multicellular animals to ingest or engulf other cells or particles, which is facilitated by the use of opsonins to bind foreign particles and interact with cell surface receptors. The invertebrate secreted C1q domain-containing proteins (C1qDCs) have been reported to exhibit opsonic activity, while the detailed mechanisms of opsonization still remain unclear. In the present study, a C1qDC (designated as CgC1qDC-5) with opsonic activity was identified from the hemolymph of oyster Crassostrea gigas. CgC1qDC-5 exhibited the ability to bind pathogen-associated molecular patterns (PAMPs) of lipopolysaccharides (LPS) and Lipid A. It could also bind and agglutinate Gram-negative bacteria Escherichia coli, Vibrio splendidus and Vibrio anguillarum, whereas the agglutinating activity could be inhibited by LPS. In addition, CgC1qDC-5 could enhance the phagocytosis of hemocytes toward E. coli, V. splendidus, and V. anguillarum. GST pull-down and surface plasmon resonance assays in vitro revealed that CgC1qDC-5 could interact with β-integrin (CgIntegrin). In vivo, CgC1qDC-5 was observed to bind hemocytes and co-localized with CgIntegrin on the cell membrane of hemocytes. Antibody-mediated blockage of CgIntegrin hindered the CgC1qDC-5-enhanced hemocytic phagocytosis. CgIntegrin also exhibited the ability to bind the Gram-negative bacteria E. coli, V. splendidus, V. anguillarum and Vibrio parahaemolyticus, and PAMP of LPS, but not Lipid A. A phagocytosis assay demonstrated that CgIntegrin could directly mediate phagocytosis toward bacteria as a phagocytic receptor. These results collectively suggested that CgC1qDC-5 could serve as an opsonin to recognize and bind bacteria, and subsequently interact with CgIntegrin on the hemocyte surface to enhance the CgIntegrin-mediated phagocytosis in oyster.
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Affiliation(s)
- Zhao Lv
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; Laboratory of Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266235, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lingling Wang
- Laboratory of Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266235, China; Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Zhihao Jia
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jiejie Sun
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Weilin Wang
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Zhaoqun Liu
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Limei Qiu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Mengqiang Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Linsheng Song
- Laboratory of Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266235, China; Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China.
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Zhang Z, Yu YX, Jiang Y, Wang YG, Liao MJ, Rong XJ, Wang K, Zhang H, Chen J. First report of isolation and complete genome of Vibrio rotiferianus strain SSVR1601 from cage-cultured black rockfish (Sebastes schlegelii) associated with skin ulcer. J Fish Dis 2019; 42:623-630. [PMID: 30851004 DOI: 10.1111/jfd.12963] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 12/19/2018] [Accepted: 12/20/2018] [Indexed: 06/09/2023]
Abstract
Vibrio rotiferianus is an important marine pathogen of various aquatic organisms and can be found widely distributed in the marine environment. To further characterize this pathogen, the pathogenic properties and genome of V. rotiferianus SSVR1601 isolated from Sebastes schlegelii with skin ulcer were analysed. SSVR1601 was shown to be short rod-shaped cell with a single polar flagellum. Different degrees of pathological changes in fish kidney, intestine, gills and liver were observed after SSVR1601 challenge. The SSVR1601 genome consists of two chromosomes and two plasmids with a total of 5,717,113 bp, 42.04%-44.93% GC content, 5,269 predicted CDSs, 134 tRNAs and 40 rRNAs. The common virulence factors including OMPs, haemolysin, flagellin, DNase, entF, algU, tcpI, acfB and rfaD were found in strain SSVR1601. Furthermore, factors responsible for iron uptake (fur, fepC and ccmC) and types II, IV and VI secretion systems were detected, which are likely responsible for the pathogenicity of SSVR1601. The antimicrobial resistance genes, bacA, tet34 and norM, were detected based on Antibiotic Resistance Genes Database. The phylogenetic analysis revealed SSVR1601 to be most closely related to V. rotiferianus strains CAIM577 and B64D1.
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Affiliation(s)
- Zheng Zhang
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academic of Fishery Sciences, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Yong-Xiang Yu
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academic of Fishery Sciences, Qingdao, China
| | - Yong Jiang
- National Oceanographic Center, Qingdao, China
| | - Yin-Geng Wang
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academic of Fishery Sciences, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Mei-Jie Liao
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academic of Fishery Sciences, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Xiao-Jun Rong
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academic of Fishery Sciences, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Kai Wang
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academic of Fishery Sciences, Qingdao, China
| | - Hao Zhang
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academic of Fishery Sciences, Qingdao, China
| | - Jing Chen
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academic of Fishery Sciences, Qingdao, China
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Farias ND, Falchetti M, Matos GM, Schmitt P, Barreto C, Argenta N, Rolland JL, Bachère E, Perazzolo LM, Rosa RD. Litopenaeus vannamei stylicins are constitutively produced by hemocytes and intestinal cells and are differentially modulated upon infections. Fish Shellfish Immunol 2019; 86:82-92. [PMID: 30439499 DOI: 10.1016/j.fsi.2018.11.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 10/24/2018] [Accepted: 11/07/2018] [Indexed: 06/09/2023]
Abstract
Stylicins are anionic antimicrobial host defense peptides (AAMPs) composed of a proline-rich N-terminal region and a C-terminal portion containing 13 conserved cysteine residues. Here, we have increased our knowledge about these unexplored crustacean AAMPs by the characterization of novel stylicin members in the most cultivated penaeid shrimp, Litopenaeus vannamei. We showed that the L. vannamei stylicin family is composed of two members (Lvan-Stylicin1 and Lvan-Stylicin2) encoded by different loci which vary in gene copy number. Unlike the other three gene-encoded antimicrobial peptide families from penaeid shrimp, the expression of Lvan-Stylicins is not restricted to hemocytes. Indeed, they are also produced by the columnar epithelial cells lining the midgut and its anterior caecum. Interestingly, Lvan-Stylicins are simultaneously transcribed at different transcriptional levels in a single shrimp and are differentially modulated in hemocytes after infections. While the expression of both genes showed to be responsive to damage-associated molecular patterns, only Lvan-Stylicin2 was induced after a Vibrio infection. Besides, Lvan-Stylicins also showed a distinct pattern of gene expression in the three portions of the midgut (anterior, middle and posterior) and during shrimp development. We provide here the first evidence of the diversity of the stylicin antimicrobial peptide family in terms of sequence and gene expression distribution and regulation.
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Affiliation(s)
- Natanael Dantas Farias
- Laboratory of Immunology Applied to Aquaculture, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Marcelo Falchetti
- Laboratory of Immunology Applied to Aquaculture, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Gabriel Machado Matos
- Laboratory of Immunology Applied to Aquaculture, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Paulina Schmitt
- Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, 2373223, Valparaíso, Chile
| | - Cairé Barreto
- Laboratory of Immunology Applied to Aquaculture, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Nicolas Argenta
- Laboratory of Immunology Applied to Aquaculture, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Jean-Luc Rolland
- Interactions Hôtes-Pathogènes-Environnements, Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, 34090, Montpellier Cedex 5, France
| | - Evelyne Bachère
- Interactions Hôtes-Pathogènes-Environnements, Université de Montpellier, CNRS, Ifremer, Université de Perpignan Via Domitia, 34090, Montpellier Cedex 5, France
| | - Luciane Maria Perazzolo
- Laboratory of Immunology Applied to Aquaculture, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Rafael Diego Rosa
- Laboratory of Immunology Applied to Aquaculture, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil.
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Zhu Z, Dong C, Weng S, He J. Identification of outer membrane protein TolC as the major adhesin and potential vaccine candidate for Vibrio harveyi in hybrid grouper, Epinephelus fuscoguttatus (♀) × E. lanceolatus (♂). Fish Shellfish Immunol 2019; 86:143-151. [PMID: 30453046 DOI: 10.1016/j.fsi.2018.11.037] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 11/13/2018] [Accepted: 11/15/2018] [Indexed: 05/21/2023]
Abstract
Vibrio harveyi is a serious pathogen of scale drop and muscle necrosis disease in marine commercial fishes. Adhesion to and colonization of the host cells surfaces is the first and crucial step for pathogenic bacterial infection, which is usually mediated by outer membrane proteins (Omps). The objectives of this study were to identify the major adhesin in Omps that plays the essential role in adhesion of V. harveyi to the host cells, and to assess the potential of this adhesin as a vaccine candidate for V. harveyi infection. We observed that pathogenic V. harveyi adhered to the surface of grouper embryonic cells (GEM cells) and induced apoptosis of them. Native Omps were extracted from nine different V. harveyi strains, and five common Omp bands were isolated by SDS-PAGE analysis. Western blot analysis and an anti-native Omp antibodies blocking assay indicated that one strong and several weak immunoreactivity Omps bands presence. Next, a total of five Omps, including TolC, Agg (Agglutination protein), Omp47, Fla (Flagellin), and OmpW, were identified and their encoding genes were cloned, characterized, and expressed in E. coli. The purified recombinant TolC could competitively inhibit the invasion of V. harveyi to GEM cells in vitro, and anti-TolC antibody also could significantly block the adhesion of V. harveyi to GEM cells. When used to immunize hybrid groupers, the recombinant TolC could confer significant protection to fish against experimental V. harveyi challenge. These data suggested that outer membrane protein TolC functions as a major adhesin in V. harveyi and could be a potential vaccine candidate for V. harveyi infection.
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Affiliation(s)
- Zhiming Zhu
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-sen University, Guangzhou, 510275, PR China; State Key Laboratory of Biocontrol / MOE Key Laboratory of Aquatic Product Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, PR China; Institute of Aquatic Economic Animals, and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Chuanfu Dong
- State Key Laboratory of Biocontrol / MOE Key Laboratory of Aquatic Product Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, PR China; Institute of Aquatic Economic Animals, and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, 510275, PR China.
| | - Shaoping Weng
- State Key Laboratory of Biocontrol / MOE Key Laboratory of Aquatic Product Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, PR China; Institute of Aquatic Economic Animals, and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Jianguo He
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-sen University, Guangzhou, 510275, PR China; State Key Laboratory of Biocontrol / MOE Key Laboratory of Aquatic Product Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, PR China; Institute of Aquatic Economic Animals, and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, 510275, PR China.
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19
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Nie L, Cai SY, Sun J, Chen J. MicroRNA-155 promotes pro-inflammatory functions and augments apoptosis of monocytes/macrophages during Vibrio anguillarum infection in ayu, Plecoglossus altivelis. Fish Shellfish Immunol 2019; 86:70-81. [PMID: 30447432 DOI: 10.1016/j.fsi.2018.11.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 11/07/2018] [Accepted: 11/13/2018] [Indexed: 06/09/2023]
Abstract
Upon recognition of pathogen-associated molecular patterns by pattern-recognition receptors, immune cells are recruited, and multiple antibacterial/viral signaling pathways are activated, leading to the production of immune-related cytokines, chemokines, and interferons along with further activation of the adaptive immune response. MicroRNAs (miRs) play essential roles in regulating such immune signaling pathways, as well as the biological activities of immune cells; however, knowledge regarding the roles of miRs in the immune-related function of monocytes/macrophages (MO/MΦ) remains limited in teleosts. In the present study, we addressed the effects of miR-155 on Vibrio anguillarum-infected MO/MΦ. Our results showed that miR-155 augmented MO/MΦ expression of proinflammatory cytokines and attenuated the expression of anti-inflammatory cytokines. Additionally, the phagocytosis and bacteria-killing abilities of these cells were boosted by miR-155 administration, which also promoted M1-type polarization but inhibited M2-type polarization. Furthermore, the V. anguillarum-infection-induced apoptosis was also enhanced by miR-155 mimic transfection, which might have been due to excessive inflammation or the accumulation of reactive oxygen species. These results represent the first report providing a detailed account of the regulatory roles of miR-155 on MO/MΦ functions in teleosts and offer insight into the evolutionary history of miR-155-mediated regulation of host immune responses.
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Affiliation(s)
- Li Nie
- Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Meishan Campus, Ningbo University, Ningbo, 315800, China
| | - Shi-Yu Cai
- Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Meishan Campus, Ningbo University, Ningbo, 315800, China
| | - Jiao Sun
- Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Meishan Campus, Ningbo University, Ningbo, 315800, China
| | - Jiong Chen
- Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Meishan Campus, Ningbo University, Ningbo, 315800, China; Key Laboratory of Applied Marine Biotechnology of Ministry of Education, Meishan Campus, Ningbo University, Ningbo, 315800, China.
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20
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King WL, Jenkins C, Go J, Siboni N, Seymour JR, Labbate M. Characterisation of the Pacific Oyster Microbiome During a Summer Mortality Event. Microb Ecol 2019; 77:502-512. [PMID: 29987529 DOI: 10.1007/s00248-018-1226-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Accepted: 07/02/2018] [Indexed: 06/08/2023]
Abstract
The Pacific oyster, Crassostrea gigas, is a key commercial species that is cultivated globally. In recent years, disease outbreaks have heavily impacted C. gigas stocks worldwide, with many losses incurred during summer. A number of infectious agents have been associated with these summer mortality events, including viruses (particularly Ostreid herpesvirus 1, OsHV-1) and bacteria; however, cases where no known aetiological agent can be identified are common. In this study, we examined the microbiome of disease-affected and disease-unaffected C. gigas during a 2013-2014 summer mortality event in Port Stephens (Australia) where known oyster pathogens including OsHV-1 were not detected. The adductor muscle microbiomes of 70 C. gigas samples across 12 study sites in the Port Stephens estuary were characterised using 16S rRNA (V1-V3 region) amplicon sequencing, with the aim of comparing the influence of spatial location and disease state on the oyster microbiome. Spatial location was found to be a significant determinant of the disease-affected oyster microbiome. Furthermore, microbiome comparisons between disease states identified a significant increase in rare operational taxonomic units (OTUs) belonging to Vibrio harveyi and an unidentified member of the Vibrio genus in the disease-affected microbiome. This is indicative of a potential role of Vibrio species in oyster disease and supportive of previous culture-based examination of this mortality event.
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Affiliation(s)
- William L King
- The School of Life Sciences, University of Technology Sydney, PO Box 123, Broadway, Sydney, NSW, 2007, Australia
- Climate Change Cluster, University of Technology Sydney, Sydney, NSW, Australia
| | - Cheryl Jenkins
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW, Australia
| | - Jeffrey Go
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW, Australia
| | - Nachshon Siboni
- Climate Change Cluster, University of Technology Sydney, Sydney, NSW, Australia
| | - Justin R Seymour
- Climate Change Cluster, University of Technology Sydney, Sydney, NSW, Australia
| | - Maurizio Labbate
- The School of Life Sciences, University of Technology Sydney, PO Box 123, Broadway, Sydney, NSW, 2007, Australia.
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21
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TRAN THT, YANAGAWA H, NGUYEN KT, HARA-KUDO Y, TANIGUCHI T, HAYASHIDANI H. Prevalence of Vibrio parahaemolyticus in seafood and water environment in the Mekong Delta, Vietnam. J Vet Med Sci 2018; 80:1737-1742. [PMID: 30249937 PMCID: PMC6261814 DOI: 10.1292/jvms.18-0241] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 09/01/2018] [Indexed: 01/22/2023] Open
Abstract
A total of 449 samples including 385 seafood and 64 water samples in the Mekong Delta of Vietnam collected in 2015 and 2016 were examined. Of 385 seafood samples, 332 (86.2%) samples were contaminated with Vibrio parahaemolyticus and 25 (6.5%) samples were pathogenic V. parahaemolyticus carrying tdh and/or trh genes. The tdh gene positive V. parahaemolyticus strains were detected in 22 (5.7%) samples and trh gene positive V. parahaemolyticus strains were found in 5 (1.3%) samples. Of 25 pathogenic V. parahaemolyticus strains, two strains harbored both tdh and trh genes and the other 23 strains carried either tdh or trh gene. Of 64 water samples at aquaculture farms, 50 (78.1%) samples were contaminated with V. parahaemolyticus. No tdh gene positive V. parahaemolyticus strains were detected; meanwhile, trh gene positive V. parahaemolyticus strain was detected in 1 (1.6%) sample. Twenty-six pathogenic V. parahaemolyticus strains isolated were classified into 6 types of O antigen, in which the serotype O3:K6 was detected in 4 strains. All pathogenic strains were group-specific PCR negative except for 4 O3:K6 strains. The result of antimicrobial susceptibility test indicated that pathogenic strains showed high resistance rates to streptomycin (84.6%), ampicillin (57.7%) and sulfisoxazole (57.7%). These findings can be used for understanding microbiological risk of seafood in the Mekong Delta, Vietnam.
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Affiliation(s)
- Thi Hong To TRAN
- Division of Animal Life Science, Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509,
Japan
| | - Haruka YANAGAWA
- Division of Animal Life Science, Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509,
Japan
| | - Khanh Thuan NGUYEN
- Division of Animal Life Science, Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509,
Japan
| | - Yukiko HARA-KUDO
- National Institute of Health Science, 3-25-26 Tono-machi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
| | - Takahide TANIGUCHI
- Division of Animal Life Science, Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509,
Japan
| | - Hideki HAYASHIDANI
- Division of Animal Life Science, Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509,
Japan
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22
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Sinatra JA, Colby K. Notes from the Field: Fatal Vibrio anguillarum Infection in an Immunocompromised Patient - Maine, 2017. MMWR Morb Mortal Wkly Rep 2018; 67:962-963. [PMID: 30161102 PMCID: PMC6124819 DOI: 10.15585/mmwr.mm6734a5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Mehbub MF, Tanner JE, Barnett SJ, Bekker J, Franco CMM, Zhang W. A controlled aquarium system and approach to study the role of sponge-bacteria interactions using Aplysilla rosea and Vibrio natriegens. Sci Rep 2018; 8:11801. [PMID: 30087404 PMCID: PMC6081443 DOI: 10.1038/s41598-018-30295-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 07/23/2018] [Indexed: 11/09/2022] Open
Abstract
Sponge-bacteria interactions are very important due to their ecological and biological significance. To understand the impact of interactions between sponges and bacteria (both associated with and external to sponges) on sponge-associated microbial diversity, sponge metabolite profiles and bioactivity, we used a controlled aquarium system and designed an experimental approach that allows the study of sponge-bacteria interactions in a well-defined manner. To test the feasibility of this approach, this system was used to study the interaction between a sponge Aplysilla rosea and a marine bacterium commonly found in seawater, Vibrio natriegens. Sponge explants were exposed to V. natriegens, at 5 × 106 cfu/ml, and changes were monitored for 48 hours. Pyro-sequencing revealed significant shifts in microbial communities associated with the sponges after 24 to 48 hours. Both the control (sponge only without added bacteria) and Vibrio-exposed sponges showed a distinct shift in bacterial diversity and abundance with time. Vibrio exposure significantly increased bacterial diversity, the abundance of a number of taxa compared to control sponges. The result experimentally supports the notion of dynamic and concerted responses by the sponge when interacting with a bacterium, and demonstrates the feasibility of using this controlled aquarium system for the study of sponge-bacteria interactions.
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Affiliation(s)
- Mohammad F Mehbub
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia.
- Medical Biotechnology, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia.
| | - Jason E Tanner
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia
- SARDI Aquatic Sciences, 2 Hamra Avenue, West Beach, SA, 5024, Adelaide, Australia
| | - Stephen J Barnett
- Medical Biotechnology, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia
| | - Jan Bekker
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia
- Medical Biotechnology, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia
| | - Christopher M M Franco
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia.
- Medical Biotechnology, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia.
| | - Wei Zhang
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia.
- Medical Biotechnology, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia.
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24
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Song YP, Liu XH, Shi ZZ, Miao FP, Fang ST, Ji NY. Bisabolane, cyclonerane, and harziane derivatives from the marine-alga-endophytic fungus Trichoderma asperellum cf44-2. Phytochemistry 2018; 152:45-52. [PMID: 29730583 DOI: 10.1016/j.phytochem.2018.04.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 04/25/2018] [Accepted: 04/27/2018] [Indexed: 06/08/2023]
Abstract
Three undescribed bisabolane derivatives, trichaspin, trichaspsides A and B, three undescribed cyclonerane sesquiterpenes, 9-cycloneren-3,7,11-triol, 11-cycloneren-3,7,10-triol, and 7,10-epoxycycloneran-3,11,12-triol, and one undescribed harziane diterpene, 11-hydroxy-9-harzien-3-one, were obtained from the culture of Trichoderma asperellum cf44-2, an endophyte of the marine brown alga Sargassum sp. Their structures and relative configurations were assigned by analysis of 1D/2D NMR and MS data, and their absolute configurations were established by ECD or specific optical rotation data. Trichaspin features an unprecedented ethylated bisabolane skeleton, while trichaspsides A and B represent the first aminoglycosides of bisabolane and norbisabolane sesquiterpenes, respectively. Nine of the compounds were evaluated for inhibition of five marine-derived pathogenic bacteria and toxicity to a marine zooplankton.
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Affiliation(s)
- Yin-Ping Song
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiang-Hong Liu
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Zhen-Zhen Shi
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Feng-Ping Miao
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Sheng-Tao Fang
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Nai-Yun Ji
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
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25
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Menezes FGR, Barbosa WE, Vasconcelos LS, Rocha RS, Maggioni R, Sousa OV, Hofer E, Vieira RHSF. Genotypic assessment of a dichotomous key to identify Vibrio coralliilyticus, a coral pathogen. Dis Aquat Organ 2018; 128:87-92. [PMID: 29565257 DOI: 10.3354/dao03209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Vibrio coralliilyticus is a known pathogen to corals and larvae of bivalves. Its identification is made based on phenotypic and genotypic characters of isolated strains. To evaluate the efficiency of the phenotypic identification, 21 strains identified as V. coralliilyticus using a widely used dichotomous key were analyzed by qualitative PCR and sequencing of the 16S rDNA region. The results obtained by the behavioral test, amino acids usage, allow us to distinguish 3 A/L/O profiles: (1) A+/L-/O+; (2) A+/L+/O+; and (3) A-/L+/O+. In the genotypic tests, all strains tested positive with primers specific for the Vibrio genus. However, when primers were used for species identification, the results did not match those obtained with the dichotomous key chosen. The phenotypic characteristics taken into account to set apart V. coralliilyticus and other species were not proven to be efficient. More information about the morphological diversity of colonies and enzymatic activities should be considered in the formulation of phenotypic keys for V. coralliilyticus and related species.
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26
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Baker-Austin C, Trinanes JA, Salmenlinna S, Löfdahl M, Siitonen A, Taylor NGH, Martinez-Urtaza J. Heat Wave-Associated Vibriosis, Sweden and Finland, 2014. Emerg Infect Dis 2018; 22:1216-20. [PMID: 27314874 PMCID: PMC4918148 DOI: 10.3201/eid2207.151996] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
During summer 2014, a total of 89 Vibrio infections were reported in Sweden and Finland, substantially more yearly infections than previously have been reported in northern Europe. Infections were spread across most coastal counties of Sweden and Finland, but unusually, numerous infections were reported in subarctic regions; cases were reported as far north as 65°N, ≈100 miles (160 km) from the Arctic Circle. Most infections were caused by non-O1/O139 V. cholerae (70 cases, corresponding to 77% of the total, all strains were negative for the cholera toxin gene). An extreme heat wave in northern Scandinavia during summer 2014 led to unprecedented high sea surface temperatures, which appear to have been responsible for the emergence of Vibrio bacteria at these latitudes. The emergence of vibriosis in high-latitude regions requires improved diagnostic detection and clinical awareness of these emerging pathogens.
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27
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Burks DJ, Norris S, Kauffman KM, Joy A, Arevalo P, Azad RK, Wildschutte H. Environmental vibrios represent a source of antagonistic compounds that inhibit pathogenic Vibrio cholerae and Vibrio parahaemolyticus strains. Microbiologyopen 2017; 6:e00504. [PMID: 28857444 PMCID: PMC5635165 DOI: 10.1002/mbo3.504] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 05/05/2017] [Accepted: 05/16/2017] [Indexed: 12/16/2022] Open
Abstract
With the overuse of antibiotics, many pathogens including Vibrio cholerae and Vibrio parahaemolyticus have evolved multidrug resistance making treatment more difficult. While understanding the mechanisms that underlie pathogenesis is crucial, knowledge of bacterial interactions of V. cholerae and V. parahaemolyticus could provide insight to their susceptibility outside of the human host. Based on previous work showing competition among environmental strains, we predict that marine-derived bacteria should inhibit Vibrio pathogens and may be a source of unique antibiotic compounds. We tested a collection of 3,456 environmental Vibrio isolates from diverse habitats against a panel of V. cholerae and V. parahaemolyticus, and identified 102 strains that inhibited the growth of these pathogens. Phylogenetic analysis revealed that 40 pathogen-inhibiting strains were unique at the hsp60 gene sequence while 62 of the isolates were identical suggesting clonal groups. Genomic comparisons of ten strains revealed diversity even between clonal isolates and were identified as being closely related to known Vibrio crassostreae, Vibrio splendidus, and Vibrio tasmaniensis strains. Further analysis revealed multiple biosynthetic gene clusters within all sequenced genomes that encoded secondary metabolites with potential antagonistic activity. Thus, environmental vibrios represent a source of compounds that inhibit Vibrio pathogens.
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Affiliation(s)
- David J. Burks
- Department of Biological SciencesUniversity of North TexasDentonTexas
| | - Stephen Norris
- Department of Biological SciencesBowling Green State UniversityBowling GreenOhio
| | - Kathryn M. Kauffman
- Department of Civil and Environmental EngineeringMassachusetts Institute of TechnologyCambridgeMassachusetts
| | - Abigail Joy
- Department of Biological SciencesBowling Green State UniversityBowling GreenOhio
| | - Philip Arevalo
- Department of Civil and Environmental EngineeringMassachusetts Institute of TechnologyCambridgeMassachusetts
| | - Rajeev K. Azad
- Department of Biological SciencesUniversity of North TexasDentonTexas
- Department of MathematicsUniversity of North TexasDentonTexas
| | - Hans Wildschutte
- Department of Biological SciencesBowling Green State UniversityBowling GreenOhio
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Chau ML, Aung KT, Hapuarachchi HC, Lee PSV, Lim PY, Kang JSL, Ng Y, Yap HM, Yuk HG, Gutiérrez RA, Ng LC. Microbial survey of ready-to-eat salad ingredients sold at retail reveals the occurrence and the persistence of Listeria monocytogenes Sequence Types 2 and 87 in pre-packed smoked salmon. BMC Microbiol 2017; 17:46. [PMID: 28245788 PMCID: PMC5331722 DOI: 10.1186/s12866-017-0956-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 02/14/2017] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND As the preparation of salads involves extensive handling and the use of uncooked ingredients, they are particularly vulnerable to microbial contamination. This study aimed to determine the microbial safety and quality of pre-packed salads and salad bar ingredients sold in Singapore, so as to identify public health risks that could arise from consuming salads and to determine areas for improvement in the management of food safety. RESULTS The most frequently encountered organism in pre-packed salad samples was B. cereus, particularly in pasta salads (33.3%, 10/30). The most commonly detected organism in salad bar ingredients was L. monocytogenes, in particular seafood ingredients (44.1%, 15/34), largely due to contaminated smoked salmon. Further investigation showed that 21.6% (37/171) of the pre-packed smoked salmon sold in supermarkets contained L. monocytogenes. Significantly higher prevalence of L. monocytogenes and higher Standard Plate Count were detected in smoked salmon at salad bars compared to pre-packed smoked salmon in supermarkets, which suggested multiplication of the organism as the products move down the supply chain. Further molecular analysis revealed that L. monocytogenes Sequence Type (ST) 2 and ST87 were present in a particular brand of pre-packed salmon products over a 4-year period, implying a potential persistent contamination problem at the manufacturing level. CONCLUSIONS Our findings highlighted a need to improve manufacturing and retail hygiene processes as well as to educate vulnerable populations to avoid consuming food prone to L. monocytogenes contamination.
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Affiliation(s)
- Man Ling Chau
- Environmental Health Institute, National Environment Agency, 11 Biopolis Way, #04-03/04, Helios Block, Singapore, 138667 Singapore
| | - Kyaw Thu Aung
- Environmental Health Institute, National Environment Agency, 11 Biopolis Way, #04-03/04, Helios Block, Singapore, 138667 Singapore
| | | | - Pei Sze Valarie Lee
- Department of Chemistry, Food Science and Technology Programme, National University of Singapore, 3 Science Drive 3, Singapore, 117543 Singapore
| | - Pei Ying Lim
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551 Singapore
| | - Joanne Su Lin Kang
- Environmental Health Institute, National Environment Agency, 11 Biopolis Way, #04-03/04, Helios Block, Singapore, 138667 Singapore
| | - Youming Ng
- Environmental Health Institute, National Environment Agency, 11 Biopolis Way, #04-03/04, Helios Block, Singapore, 138667 Singapore
| | - Hooi Ming Yap
- Environmental Health Institute, National Environment Agency, 11 Biopolis Way, #04-03/04, Helios Block, Singapore, 138667 Singapore
| | - Hyun-Gyun Yuk
- Department of Chemistry, Food Science and Technology Programme, National University of Singapore, 3 Science Drive 3, Singapore, 117543 Singapore
| | - Ramona Alikiiteaga Gutiérrez
- Environmental Health Institute, National Environment Agency, 11 Biopolis Way, #04-03/04, Helios Block, Singapore, 138667 Singapore
| | - Lee Ching Ng
- Environmental Health Institute, National Environment Agency, 11 Biopolis Way, #04-03/04, Helios Block, Singapore, 138667 Singapore
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551 Singapore
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Steinum TM, Karataş S, Martinussen NT, Meirelles PM, Thompson FL, Colquhoun DJ. Multilocus Sequence Analysis of Close Relatives Vibrio anguillarum and Vibrio ordalii. Appl Environ Microbiol 2016; 82:5496-504. [PMID: 27371582 PMCID: PMC5007779 DOI: 10.1128/aem.00620-16] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 06/18/2016] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED The genetic heterogeneity of the close relatives Vibrio anguillarum and Vibrio ordalii, both serious pathogens of fish causing extensive losses in aquaculture, was studied. Eight housekeeping genes, i.e., atpA, ftsZ, gapA, gyrB, mreB, rpoA, topA, and pyrH, were partially sequenced in 116 isolates from diverse fish species and geographical areas. The eight genes appear to be under purifying selection, and the genetic diversity in the total data set was estimated to be 0.767 ± 0.026. Our multilocus sequence analysis (MLSA) scheme identified several widespread clonal complexes and resolved the isolates, for the most part, according to serotype. Serotype O2b isolates from diseased cod in Norway, Ireland, and Scotland were found to be extremely homogeneous. Horizontal gene transfer appears to be fairly common within and between clonal complexes. Taken together, MLSA and in silico DNA-DNA hybridization (DDH) calculations suggest that some isolates previously characterized as V ordalii, i.e., 12B09, FF93, FS144, and FS238, are in fact V. anguillarum isolates. The precise taxonomic situation for two isolates from Atlantic cod that display several traits consistent with V. ordalii, i.e., NVI 5286 and NVI 5918, and a single environmental strain that was previously considered to represent V. ordalii, i.e., FF167, is less clear. IMPORTANCE It is still being debated whether V. anguillarum and V ordalii represent separate bacterial species. Our study addresses this issue and elucidates the degree of genetic variability within this group of closely related bacteria, based on a substantial number of isolates. Our results clearly illustrate the existence of different populations among putative V ordalii isolates. On the basis of additional full-length genomic analysis, we conclude that most environmental isolates previously identified as V ordalii lie firmly within the species V. anguillarum While bona fide fish-pathogenic V ordalii isolates display a very close genetic relationship with V. anguillarum, they combine a clearly divergent evolutionary pattern with clear phenotypic differences. The study also highlights the need for further characterization of fish-pathogenic isolates from the northern Atlantic region that share phenotypic characteristics with V. ordalii but are genetically closer to V. anguillarum The retention of taxonomic distinctions between the phenotypically different groups of bacteria is of practical advantage to microbial ecologists and veterinarians.
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Affiliation(s)
- Terje M Steinum
- Department of Genetics and Molecular Biology, Life Sciences Faculty, Istanbul University, Istanbul, Turkey
| | - Süheyla Karataş
- Department of Fish Diseases, Fisheries Faculty, Istanbul University, Istanbul, Turkey
| | | | - Pedro M Meirelles
- Institute of Biology and SAGE, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fabiano L Thompson
- Institute of Biology and SAGE, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Duncan J Colquhoun
- Section for Bacteriology, Norwegian Veterinary Institute, Oslo, Norway Institute for Biology, University of Bergen, Bergen, Norway
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Dubert J, Romalde JL, Spinard EJ, Nelson DR, Gomez-Chiarri M, Barja JL. Reclassification of the larval pathogen for marine bivalves Vibrio tubiashii subsp. europaeus as Vibrio europaeus sp. nov. Int J Syst Evol Microbiol 2016; 66:4791-4796. [PMID: 27538951 DOI: 10.1099/ijsem.0.001431] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The Orientalis clade has a relevant significance for bivalve aquaculture since it includes the pathogens Vibrio bivalvicida, Vibrio tubiashii subsp. tubiashii and Vibrio tubiashii subsp. europaeus. However, the previous taxonomic description of the subspecies of V. tubiashii shows some incongruities that should be emended. In the genomic age, the comparison between genome assemblies is the key to clarify the taxonomic position of both subspecies. With this purpose, we have tested the ability of multilocus sequence analysis based on eight housekeeping gene sequences (gapA, gyrB, ftsZ, mreB, pyrH, recA, rpoA and topA), different in silico genome-to-genome comparisons, chemotaxonomic features and phenotypic traits to reclassify the subspecies V. tubiashii subsp. europaeus within the Orientalis clade. This polyphasic approach clearly demonstrated that this subspecies is phylogenetically and phenotypically distinct from V. tubiashii and should be elevated to the rank of species as Vibrio europaeus sp. nov. This reclassification allows us to update the Orientalis clade (V. bivalvicida,V. brasiliensis, V. crosai, V. hepatarius, V. orientalis, V. sinaloensis, V. tubiashii and V. europaeus sp. nov.) and reconstruct a better phylogeny of the genus Vibrio. An emended description of V. tubiashii is provided. Finally, the proposed novel species is represented by emergent bivalve pathogens [type strain PP-638T (=CECT 8136T=DSM 27349T), PP2-843 and 07/118 T2] responsible for high mortalities in Spanish and French hatcheries.
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Affiliation(s)
- Javier Dubert
- Departamento de Microbiología y Parasitología, CIBUS-Facultad de Biología, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Jesús L Romalde
- Departamento de Microbiología y Parasitología, CIBUS-Facultad de Biología, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Edward J Spinard
- Department of Cell and Molecular Biology, University of Rhode Island, Kingston, RI 02881, USA
| | - David R Nelson
- Department of Cell and Molecular Biology, University of Rhode Island, Kingston, RI 02881, USA
| | - Marta Gomez-Chiarri
- Department of Fisheries, Animal and Veterinary Sciences, University of Rhode Island, Kingston, RI 02881, USA
| | - Juan L Barja
- Departamento de Microbiología y Parasitología, CIBUS-Facultad de Biología, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
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Baker-Austin C, Trinanes JA, Salmenlinna S, Löfdahl M, Siitonen A, Taylor NGH, Martinez-Urtaza J. Heat Wave-Associated Vibriosis, Sweden and Finland, 2014. Emerg Infect Dis 2016. [PMID: 27314874 DOI: 10.32032/eid2207.151996] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023] Open
Abstract
During summer 2014, a total of 89 Vibrio infections were reported in Sweden and Finland, substantially more yearly infections than previously have been reported in northern Europe. Infections were spread across most coastal counties of Sweden and Finland, but unusually, numerous infections were reported in subarctic regions; cases were reported as far north as 65°N, ≈100 miles (160 km) from the Arctic Circle. Most infections were caused by non-O1/O139 V. cholerae (70 cases, corresponding to 77% of the total, all strains were negative for the cholera toxin gene). An extreme heat wave in northern Scandinavia during summer 2014 led to unprecedented high sea surface temperatures, which appear to have been responsible for the emergence of Vibrio bacteria at these latitudes. The emergence of vibriosis in high-latitude regions requires improved diagnostic detection and clinical awareness of these emerging pathogens.
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Jasmin MY, Wagaman H, Yin TA, Ina-salwany MY, Daud HM, Karim M. Screening and evaluation of local bacteria isolated from shellfish as potential probiotics against pathogenic Vibrios. J Environ Biol 2016; 37:801-809. [PMID: 28779740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The present study was carried out to isolate, screen and evaluate potential candidates of local bacteria isolated from tiger shrimp Penaeus monodon and slipper cupped oysters Crassostrea iredalei as probiotics in shellfish aquaculture. A total of 144 of bacteria were successfully isolated from the intestine and stomach of 20 tails of healthy adult tiger shrimp P. monodon, while 136 were successfully isolated from the digestive tract, gills and inner shells of 10 healthy adult C. iredalei. The number of potential isolates was narrowed down to two from tiger shrimp, and one from slipper cupped oyster after in vitro screening assays. The three isolates, labeled as G11, I24 and S66, were identified as Virgibacillus sp., Bacillus sp. and Exiquobacterium sp., respectively, using 16S rDNA gene analysis. The antagonistic ability of the isolates towards Vibrio alginolyticus and Vibrio harveyi were conducted in stagnant and liquid modes via spot lawn and broth co-culture assay, respectively. In these assays, all the potential probionts were inhibitory to both pathogenic vibrios. In the in-vivo assay, Artemia was used as host and treated with different concentrations of potential probionts (10(4), 10(6) and 10(8) CFU ml(-1)), and challenged with V. alginolyticus and V. harveyi at 105 CFU ml(-1), respectively. Artemia treated with probiont G11 at all concentrations and challenged with V. alginolyticus had increased survival (70 ? 80 %), which was significantly higher as compared with group with only the pathogen (20 %). Meanwhile, probiont I24 increased the survival of Artemia by 70 % at a concentration of 10(8) CFU ml(-1) after being challenged with V. alginolyticus and Artemia treated with 10(6) CFU ml(-1) of probiont S66 had increased survival of 90% after being challenged with V. harveyi. Thus, the three isolates might have potential applications as probiotics in shellfish aquaculture against vibriosis. ?
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Nair V, Schuhmann I, Anke H, Kelter G, Fiebig HH, Helmke E, Laatsch H. Marine Bacteria, XLVII - Psychrotolerant Bacteria from Extreme Antarctic Habitats as Producers of Rare Bis- and Trisindole Alkaloids. Planta Med 2016; 82:910-918. [PMID: 27286331 DOI: 10.1055/s-0042-108204] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
From the gastrointestinal tract of a fish dredged near the South Orkney Islands in Antarctica, we isolated the psychrotolerant bacterial strain T262, which belongs to the species Vibrio splendidus. Investigation of this strain led to the isolation of a series of 15 bis- and trisindole derivatives. Among them, six new indole alkaloids, namely, turbomycin C [4'-n-butoxyphenyl-bis(1H-indol-3-yl)methane, 1a], turbomycin D [4'-n-propoxyphenyl-bis(1H-indol-3-yl)methane, 1b], turbomycin E [4'-ethoxyphenyl-bis(1H-indol-3-yl)methane, 1c], turbomycin F [4'-methoxy-3',5'-dinitrophenyl-bis(1H-indol-3-yl)methane, 2], trisindolal (3a), and 4-(1H-indol-3-yl-sulfanyl)phenol (4). Another new bisindole derivative elucidated as 2-(indol-3-ylmethyl)-indol-3-ylethanol (7a) was obtained together with six known compounds from the psychrotolerant Arthrobacter psychrochitiniphilus strain T406, isolated from the excrement of penguins. Some of the isolated compounds showed activity against both gram-positive and gram-negative bacteria at 10 µg/paper disk. Trisindolal (3a) was active against the peronosporomycetes Botrytis cinerea and Phytophthora infestans, and some of the indole derivatives indicated promising cytotoxicity towards human tumor cell lines. By exhibiting a mean IC50 of 0.45 µg/mL (1.17 µM), trisindolal (3a) showed pronounced potency and selectivity in a panel of 11 human tumor cell lines derived from 10 different tumor histotypes.
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Affiliation(s)
- Vimal Nair
- Institute of Organic and Biomolecular Chemistry, University of Göttingen, Göttingen, Germany
| | - Imelda Schuhmann
- Institute of Organic and Biomolecular Chemistry, University of Göttingen, Göttingen, Germany
| | - Heidrun Anke
- Institute of Biotechnology and Drug Research, Kaiserslautern, Germany
| | | | | | - Elisabeth Helmke
- Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
| | - Hartmut Laatsch
- Institute of Organic and Biomolecular Chemistry, University of Göttingen, Göttingen, Germany
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Wang X, Zhang Y, Qin G, Luo W, Lin Q. A novel pathogenic bacteria (Vibrio fortis) causing enteritis in cultured seahorses, Hippocampus erectus Perry, 1810. J Fish Dis 2016; 39:765-769. [PMID: 26466548 DOI: 10.1111/jfd.12411] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 07/24/2015] [Accepted: 07/24/2015] [Indexed: 06/05/2023]
Affiliation(s)
- X Wang
- Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Y Zhang
- Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - G Qin
- Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- University of Chinese Academy of Sciences, Beijing, China
| | - W Luo
- Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - Q Lin
- Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
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35
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Lun J, Zhang S, Dong Y, Xie S, Mai H, Mei Y, Hu Z. [Immunological cross-reactivity and cross-protection of outer membrane protein OmpU among Vibrio species]. Wei Sheng Wu Xue Bao 2016; 56:867-879. [PMID: 29727148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To study the immunological cross-reactivity and cross-protection characteristics of OmpU in Vibrio species. METHODS The ompU genes from 10 Vibrio strains were cloned, sequenced, followed by bioinformatics analysis. Western blot and whole-cell ELISA assay were used respectively to determine immunological cross-reaction feature and subcellular location of OmpU with rabbit serum against recombinant OmpU from V. parahaemolyticus ATCC17802, V. alginolyticus ATCC33787, V. vulnificus ATCC27562, V. mimicus ATCC33653 and V. cholera Vb0. Finally, the cross-protective property of recombinant OmpU (V. cholera-derived) was evaluated through vaccination and subsequent challenge with heterogeneous virulent Vibrio strains in mice. RESULTS The similarities of OmpU proteins of Vibrio ranged from 73.0 to 100% intra-species, and from 58.6 to 89.0% inter-species. Furthermore, homologous epitopes were found in OmpU and shared by different species of Vibrios. Western blot of rabbit serum against recombinant OmpU showed cross-recognition intra- and inter-species. Bands were observed ranging from 35 to 40 kDa. Whole-cell ELISA assay further confirmed that the antiserum of recombinant OmpU from V. parahaemolyticus ATCC17802, V. vulnifgicus ATCC27562 and V. mimicus ATCC33653 recognized the tested Vibrio species, implying that epitopes of OmpU were located on the cell surface. Recorded relative percent survival of the vaccinated group varied from 43.0 to 100%, showing that mice were protected from Vibrio infection after immunization with OmpU protein. CONCLUSION OmpU was a conserved antigen among tested Vibrio species and might be a universal vaccine candidate for the prevention of Vibriosis.
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Franz P, Betat H, Mörl M. Genotyping bacterial and fungal pathogens using sequence variation in the gene for the CCA-adding enzyme. BMC Microbiol 2016; 16:47. [PMID: 26987313 PMCID: PMC4797355 DOI: 10.1186/s12866-016-0670-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 03/09/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To allow an immediate treatment of an infection with suitable antibiotics and bactericides or fungicides, there is an urgent need for fast and precise identification of the causative human pathogens. Methods based on DNA sequence comparison like 16S rRNA analysis have become standard tools for pathogen verification. However, the distinction of closely related organisms remains a challenging task. To overcome such limitations, we identified a new genomic target sequence located in the single copy gene for tRNA nucleotidyltransferase fulfilling the requirements for a ubiquitous, yet highly specific DNA marker. In the present study, we demonstrate that this sequence marker has a higher discriminating potential than commonly used genotyping markers in pro- as well as eukaryotes, underscoring its applicability as an excellent diagnostic tool in infectology. RESULTS Based on phylogenetic analyses, a region within the gene for tRNA nucleotidyltransferase (CCA-adding enzyme) was identified as highly heterogeneous. As prominent examples for pro- and eukaryotic pathogens, several Vibrio and Aspergillus species were used for genotyping and identification in a multiplex PCR approach followed by gel electrophoresis and fluorescence-based product detection. Compared to rRNA analysis, the selected gene region of the tRNA nucleotidyltransferase revealed a seven to 30-fold higher distinction potential between closely related Vibrio or Aspergillus species, respectively. The obtained data exhibit a superb genome specificity in the diagnostic analysis. Even in the presence of a 1,000-fold excess of human genomic DNA, no unspecific amplicons were produced. CONCLUSIONS These results indicate that a relatively short segment of the coding region for tRNA nucleotidyltransferase has a higher discriminatory potential than most established diagnostic DNA markers. Besides identifying microbial pathogens in infections, further possible applications of this new marker are food hygiene controls or metagenome analyses.
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Affiliation(s)
- Paul Franz
- Institute for Biochemistry, Leipzig University, Brüderstr. 34, 04103, Leipzig, Germany
| | - Heike Betat
- Institute for Biochemistry, Leipzig University, Brüderstr. 34, 04103, Leipzig, Germany
| | - Mario Mörl
- Institute for Biochemistry, Leipzig University, Brüderstr. 34, 04103, Leipzig, Germany
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You KG, Bong CW, Lee CW. Antibiotic resistance and plasmid profiling of Vibrio spp. in tropical waters of Peninsular Malaysia. Environ Monit Assess 2016; 188:171. [PMID: 26884358 DOI: 10.1007/s10661-016-5163-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 02/03/2016] [Indexed: 06/05/2023]
Abstract
Vibrio species isolated from four different sampling stations in the west coast of Peninsular Malaysia were screened for their antimicrobial resistance and plasmid profiles. A total of 138 isolates belonging to 15 different species were identified. Vibrio campbellii, V. parahaemolyticus, V. harveyi, and V. tubiashii were found to predominance species at all stations. High incidence of erythromycin, ampicillin, and mecillinam resistance was observed among the Vibrio isolates. In contrast, resistance against aztreonam, cefepime, streptomycin, sulfamethoxazole, and sulfonamides was low. All the Vibrio isolates in this study were found to be susceptible to imipenem, norfloxacin, ofloxacin, chloramphenicol, trimethoprim/sulfamethoxazole, and oxytetracycline. Ninety-five percent of the Vibrio isolates were resistant to one or more different classes of antibiotic, and 20 different resistance antibiograms were identified. Thirty-two distinct plasmid profiles with molecular weight ranging from 2.2 to 24.8 kb were detected among the resistance isolates. This study showed that multidrug-resistant Vibrio spp. were common in the aquatic environments of west coast of Peninsular Malaysia.
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Affiliation(s)
- K G You
- Laboratory of Microbial Ecology, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
- Institute of Ocean and Earth Sciences (IOES), University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - C W Bong
- Laboratory of Microbial Ecology, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
- Institute of Ocean and Earth Sciences (IOES), University of Malaya, 50603, Kuala Lumpur, Malaysia.
| | - C W Lee
- Laboratory of Microbial Ecology, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
- Institute of Ocean and Earth Sciences (IOES), University of Malaya, 50603, Kuala Lumpur, Malaysia
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Gulla S, Sørum H, Vågnes Ø, Colquhoun DJ. Phylogenetic analysis and serotyping of Vibrio splendidus-related bacteria isolated from salmon farm cleaner fish. Dis Aquat Organ 2015; 117:121-131. [PMID: 26648104 DOI: 10.3354/dao02938] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Cleaner fish, i.e. various wrasse (Labridae) species and lumpsucker Cyclopterus lumpus, are to an increasing extent used for biocontrol of the salmon louse Lepeophtheirus salmonis in European salmon farming. Although efficient de-licers, cleaner fish mortality levels in salmon farms are often high. Bacterial infections are common, and Vibrio splendidus-related strains are frequently identified during diagnostic investigations. The population structure of 112 V. splendidus-related isolates, derived primarily from wrasse species, was investigated by means of multilocus sequence analysis using 5 housekeeping genes (rpoD, ftsZ, pyrH, rpoA and atpA). Most isolates were found to be closely related to the V. splendidus type strain, yet displayed extensive genetic microdiversity. Slide agglutination testing using polyclonal rabbit antisera further indicated O-antigen variability. Intra-outbreak genetic and antigenic diversity suggests direct infection from seawater, rather than fish-to-fish transmission, as the main route of infection. The variable nature of isolates involved complicates qualified selection of representative candidate strains, e.g. for infection and vaccine trials.
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Affiliation(s)
- Snorre Gulla
- Norwegian Veterinary Institute, PO Box 750 Sentrum, 0106 Oslo, Norway
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Kim HJ, Ryu JO, Lee SY, Kim ES, Kim HY. Multiplex PCR for detection of the Vibrio genus and five pathogenic Vibrio species with primer sets designed using comparative genomics. BMC Microbiol 2015; 15:239. [PMID: 26502878 PMCID: PMC4624192 DOI: 10.1186/s12866-015-0577-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 10/19/2015] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND The genus Vibrio is clinically significant and major pathogenic Vibrio species causing human Vibrio infections are V. cholerae, V. parahaemolyticus, V. vulnificus, V. alginolyticus and V. mimicus. In this study, we screened for novel genetic markers using comparative genomics and developed a Vibrio multiplex PCR for the reliable diagnosis of the Vibrio genus and the associated major pathogenic Vibrio species. METHODS A total of 30 Vibrio genome sequences were subjected to comparative genomics, and specific genes of the Vibrio genus and five major pathogenic Vibrio species were screened. The designed primer sets from the screened genes were evaluated by single PCR using DNAs from various Vibrio spp. and other non-Vibrio bacterial strains. A sextuplet multiplex PCR using six primer sets was developed to enable detection of the Vibrio genus and five pathogenic Vibrio species. RESULTS The designed primer sets from the screened genes yielded specific diagnostic results for target the Vibrio genus and Vibrio species. The specificity of the developed multiplex PCR was confirmed with various Vibrio and non-Vibrio strains. This Vibrio multiplex PCR was evaluated using 117 Vibrio strains isolated from the south seashore areas in Korea and Vibrio isolates were identified as Vibrio spp., V. parahaemolyticus, V. vulnificus and V. alginolyticus, demonstrating the specificity and discriminative ability of the assay towards Vibrio species. CONCLUSIONS This novel multiplex PCR method could provide reliable and informative identification of the Vibrio genus and major pathogenic Vibrio species in the food safety industry and in early clinical treatment, thereby protecting humans against Vibrio infection.
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Affiliation(s)
- Hyun-Joong Kim
- Institute of Life Sciences & Resources and Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701, Republic of Korea.
| | - Ji-Oh Ryu
- Institute of Life Sciences & Resources and Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701, Republic of Korea.
| | - Shin-Young Lee
- Institute of Life Sciences & Resources and Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701, Republic of Korea.
| | - Ei-Seul Kim
- Institute of Life Sciences & Resources and Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701, Republic of Korea.
| | - Hae-Yeong Kim
- Institute of Life Sciences & Resources and Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701, Republic of Korea.
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Han J, Huang Y, Ye J, Xiao M. [Screening and identification of a bacterium capable of converting agar to neoagaro oligosaccharides]. Wei Sheng Wu Xue Bao 2015; 55:1126-1132. [PMID: 26762025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To screen and identify a bacterium capable of converting agar to neoagaro oligosaccharides. METHODS We took samples of porphyra haitanensis and nearby seawater, and then used the medium containing 1 per thousand agar to enrich the target bacteria. The target isolates were obtained by dilution-plate method, of which crude enzymes were further obtained by liquid culture. We adopted DNS method to determine the target bacteria which can convert agar to neoagaro oligosaccharides. The phylogenetics was identified by analyzing 16S rDNA sequence and combining the strain's morphological and bacterial colonial physiological biochemical characteristics. RESULTS We isolated a gram-negative bacterial strain HJPHYXJ-1 capable of transforming agar to neoagaro oligosaccharides. Basic Local Alignment Search Tool (BLAST) search of HJPHYXJ-1's 16S rDNA sequence on GenBank suggested that the similarity between this strain and Vibrio natriegens reached 99% . In addition, the morphological and physiological biochemical characteristics of HJPHYXJ-1 also showed highly similarity to Vibrio natriegens. So we identified HJPHYXJ-1 as Vibrio natriegens. The results of HPLC suggested that the metabolite of enzymatic degradation was neoagaro oligosaccharides. CONCLUSIONS HJPHYXJ-1 or the new isolate of Vibrio natriegens was capable of converting agar to neoagaro oligosaccharides.
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Al-saari N, Gao F, A.K.M. Rohul A, Sato K, Sato K, Mino S, Suda W, Oshima K, Hattori M, Ohkuma M, Meirelles PM, Thompson FL, Thompson C, A. Filho GM, Gomez-Gil B, Sawabe T, Sawabe T. Advanced Microbial Taxonomy Combined with Genome-Based-Approaches Reveals that Vibrio astriarenae sp. nov., an Agarolytic Marine Bacterium, Forms a New Clade in Vibrionaceae. PLoS One 2015; 10:e0136279. [PMID: 26313925 PMCID: PMC4551953 DOI: 10.1371/journal.pone.0136279] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 08/01/2015] [Indexed: 11/18/2022] Open
Abstract
Advances in genomic microbial taxonomy have opened the way to create a more universal and transparent concept of species but is still in a transitional stage towards becoming a defining robust criteria for describing new microbial species with minimum features obtained using both genome and classical polyphasic taxonomies. Here we performed advanced microbial taxonomies combined with both genome-based and classical approaches for new agarolytic vibrio isolates to describe not only a novel Vibrio species but also a member of a new Vibrio clade. Two novel vibrio strains (Vibrio astriarenae sp. nov. C7T and C20) showing agarolytic, halophilic and fermentative metabolic activity were isolated from a seawater sample collected in a coral reef in Okinawa. Intraspecific similarities of the isolates were identical in both sequences on the 16S rRNA and pyrH genes, but the closest relatives on the molecular phylogenetic trees on the basis of 16S rRNA and pyrH gene sequences were V. hangzhouensis JCM 15146T (97.8% similarity) and V. agarivorans CECT 5085T (97.3% similarity), respectively. Further multilocus sequence analysis (MLSA) on the basis of 8 protein coding genes (ftsZ, gapA, gyrB, mreB, pyrH, recA, rpoA, and topA) obtained by the genome sequences clearly showed the V. astriarenae strain C7T and C20 formed a distinct new clade protruded next to V. agarivorans CECT 5085T. The singleton V. agarivorans has never been included in previous MLSA of Vibrionaceae due to the lack of some gene sequences. Now the gene sequences are completed and analysis of 100 taxa in total provided a clear picture describing the association of V. agarivorans into pre-existing concatenated network tree and concluded its relationship to our vibrio strains. Experimental DNA-DNA hybridization (DDH) data showed that the strains C7T and C20 were conspecific but were separated from all of the other Vibrio species related on the basis of both 16S rRNA and pyrH gene phylogenies (e.g., V. agarivorans CECT 5085T, V. hangzhouensis JCM 15146T V. maritimus LMG 25439T, and V. variabilis LMG 25438T). In silico DDH data also supported the genomic relationship. The strains C7T also had less than 95% average amino acid identity (AAI) and average nucleotide identity (ANI) towards V. maritimus C210, V. variabilis C206, and V. mediterranei AK1T, V. brasiliensis LMG 20546T, V. orientalis ATCC 33934T, and V. sinaloensis DSM 21326. The name Vibrio astriarenae sp. nov. is proposed with C7 as the type strains. Both V. agarivorans CECT 5058T and V. astriarenae C7T are members of the newest clade of Vibrionaceae named Agarivorans.
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Affiliation(s)
- Nurhidayu Al-saari
- Laboratory of Microbiology, Faculty of Fisheries, Hokkaido University, Minato-cho, Hakodate, Japan
- * E-mail:
| | - Feng Gao
- Laboratory of Microbiology, Faculty of Fisheries, Hokkaido University, Minato-cho, Hakodate, Japan
| | - Amin A.K.M. Rohul
- Laboratory of Microbiology, Faculty of Fisheries, Hokkaido University, Minato-cho, Hakodate, Japan
| | - Kazumichi Sato
- Laboratory of Microbiology, Faculty of Fisheries, Hokkaido University, Minato-cho, Hakodate, Japan
| | - Keisuke Sato
- Laboratory of Microbiology, Faculty of Fisheries, Hokkaido University, Minato-cho, Hakodate, Japan
| | - Sayaka Mino
- Laboratory of Microbiology, Faculty of Fisheries, Hokkaido University, Minato-cho, Hakodate, Japan
| | - Wataru Suda
- Laboratory of Metagenomics, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, Japan
- Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo, Japan
| | - Kenshiro Oshima
- Laboratory of Metagenomics, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, Japan
| | - Masahira Hattori
- Laboratory of Metagenomics, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, Japan
- Graduate School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Moriya Ohkuma
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Center, Ibaraki, Japan
| | - Pedro M. Meirelles
- Institute of Biology, SAGE-COPPE, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Fabiano L. Thompson
- Institute of Biology, SAGE-COPPE, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Cristiane Thompson
- Institute of Biology, SAGE-COPPE, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | | | - Bruno Gomez-Gil
- CIAD, AC Mazatlan Unit for Aquaculture and Environmental Management, Mazatlán, México
| | - Toko Sawabe
- Department of Food and Nutrition, Hakodate Junior College, Hakodate, Japan
| | - Tomoo Sawabe
- Laboratory of Microbiology, Faculty of Fisheries, Hokkaido University, Minato-cho, Hakodate, Japan
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Randazzo B, Abbate F, Marino F, Mancuso M, Guerrera MC, Muglia U, Navarra M, Germanà A. Induction of mild enterocolitis in zebrafish Danio rerio via ingestion of Vibrio anguillarum serovar O1. Dis Aquat Organ 2015; 115:47-55. [PMID: 26119299 DOI: 10.3354/dao02864] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Vibrio anguillarum is the etiological agent of a fatal hemorrhagic disease known as vibriosis that affects a wide range of fish species, causing severe economic losses. Several investigations have been carried out to elucidate the virulence mechanisms of this pathogen and to develop rapid detection techniques and effective disease-prevention strategies. The aim of our study was to evaluate the most effective way to induce mild enteritis in a fish model, in order to allow further applications. The experiments were carried out using 2 methods of administration of V. anguillarum serotype O1 to adult zebrafish Danio rerio: via intraperitoneal injection and via ingestion of infected Artemia nauplii. The results showed that the intraperitoneal administration often caused massive fish death due to severe systemic involvement. In our experiments, the effect of intraperitoneal infection was evident 48 h post infection, with cumulative mortality within 7 d post infection with severe histopathological changes in kidney hematopoietic tissue and in the intestine. In contrast, oral infection via Artemia did not show systemic involvement and only a moderate degree of inflammatory influx of the mucosa, a partial recovery at 12 d post infection, and no mortality. For these reasons, oral infection with live food appears to be the most effective method to induce mild enteritis with a local inflammatory response.
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Affiliation(s)
- B Randazzo
- Department of Veterinary Sciences, University of Messina, Polo Universitario dell'Annunziata, 98168 Messina, Italy
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Declercq AM, Chiers K, Soetaert M, Lasa A, Romalde JL, Polet H, Haesebrouck F, Decostere A. Vibrio tapetis isolated from vesicular skin lesions in Dover sole Solea solea. Dis Aquat Organ 2015; 115:81-86. [PMID: 26119302 DOI: 10.3354/dao02880] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Vibrio tapetis is primarily known as the causative agent for brown ring disease in bivalves, although it has been isolated from cultivated fish during mortalities on farms. Here we describe the first isolation of V. tapetis from wild-caught and subsequently captive-held Dover sole Solea solea. Pathological features consisted of multifocal circular greyish-white skin discolourations evolving into vesicular lesions and subsequent ulcerations on the pigmented side. On the non-pigmented side, multiple circular lesions-white at the center and red at the edges-were evident. Histological examination of the vesicular lesions revealed dermal fluid-filled spaces, collagen tissue necrosis and a mixed inflammatory infiltrate, with large numbers of small rod-shaped bacteria. In the deep skin lesions, loss of scales and dermal connective tissue, with degeneration and fragmentation of the myofibres bordering the ulceration, were noted. Serotyping, DNA-DNA hybridization and REP- and ERIC-PCR techniques showed that the retrieved isolates displayed a profile similar to the representative strain of genotype/serotype O2 which originally was isolated from carpet-shell clam Venerupis decussata and to which isolates obtained from wedge sole Dicologoglossa cuneata were also closely related.
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Affiliation(s)
- A M Declercq
- Department of Morphology, Faculty of Veterinary Medicine, Ghent University, 9820 Merelbeke, Belgium
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Gaevskaia NE, Kudriakova TA, Makedonova LD, Kachkina GV. [THE IDENTIFICATION AND DIFFERENTIATION OF BACTERIOPHAGES OF HUMAN PATHOGENIC VIBRIO]. Klin Lab Diagn 2015; 60:62-64. [PMID: 26189294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The issue of identification and differentiation of large group of bacteriophages of human pathogenic vibrio is still unresolved. In research and practical applied purposes it is important to consider characteristics of bacteriophages for establishing similarity and differences between them. The actual study was carried out to analyze specimens of DNA-containing bacteriophages of pathogenic vibrio. The overwhelming majority of them characterized by complicated type of symmetry--phages with double-helical DNA and also phages with mono-helical DNA structure discovered recently in vibrio. For the first time, the general framework of identification and differentiation of bacteriophages of pathogenic vibrio was developed. This achievement increases possibility to establish species assignment of phages and to compare with phages registered in the database. "The collection of bacteriophages and test-strains of human pathogenic vibrio" (No2010620549 of 24.09.210).
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Afanas'ev MV, Mironova LV, Balakhonov SV. [Maldi-tof ms analysis for yersinia pestis, vibrio cholera, and francisella tularensis identification]. Mol Gen Mikrobiol Virusol 2015; 33:3-8. [PMID: 26182660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Numerous studies showed that a new technology for the clinical microbiology laboratories, Matrix-Assisted Laser Desorption Ionization--Time of Flight Mass Spectrometry (MALDI-ToF MS), allows fast, accurate, and effective identification of most clinically relevant microorganisms to be implemented. In the present review, we discuss applications of this approach for identification and typing of extremely dangerous pathogens--Yersinia pestis, Vibrio cholera, and Francisella tularensis, including the advantages and disadvantages of the method, sample preparation and biosafety problems.
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Farto Seguín RM, Bermúdez MB, Rivera L, Nieto TP. Increased survival of juvenile turbot Scophthalmus maximus by using bacteria associated with cultured oysters. J Aquat Anim Health 2014; 26:251-262. [PMID: 25361445 DOI: 10.1080/08997659.2014.920734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Preventing vibriosis in juvenile cultured Turbot Scophthalmus maximus caused by Vibrio anguillarum frequently requires the use of feed supplemented with antibiotics in addition to vaccines. Whether the use of probiotics instead of antibiotics in juvenile Turbot is a safer strategy requires more study. The antibacterial potential of 148 Vibrio spp. strains (mostly isolated from cultures of healthy oysters, clams, and Turbot) was analyzed in vitro against V. anguillarum and other pathogens by means of an agar diffusion assay. A wide spectrum of inhibitory activity was shown by 9 strains. Based on their easy phenotypic differentiation from V. anguillarum, we selected two strains (S1 and S2, both isolated from the European flat oyster Ostrea edulis) for testing in juvenile Turbot (3 g). None of the strains were virulent by intraperitoneal or bath challenges, and all were susceptible to the antibiotics most frequently used in aquaculture. Three different stocks of Turbot, which were assayed separately, were significantly protected from infection with V. anguillarum. The final survival rates of fish treated in mixed challenges with S1 or S2 and V. anguillarum were 44% and 66%, respectively, whereas only 17% of the fish treated with only the pathogenic strain survived. The application of probiotic strains also increased the survival time of juvenile Turbot after infection with V. anguillarum. Both strains persisted in the epidermal mucus layer of the fish for 30 d, and they were not displaced by the pathogen. These data prove the efficacy of using bacteria well adapted to the dynamics of culture production as a way to provide juvenile Turbot immediate protection against infection by V. anguillarum. Moreover, the epidermal mucus sampling was useful for investigating the persistence of both probiotic strains when exposed to the pathogen.
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Madec S, Pichereau V, Jacq A, Paillard M, Boisset C, Guérard F, Paillard C, Nicolas JL. Characterization of the secretomes of two vibrios pathogenic to mollusks. PLoS One 2014; 9:e113097. [PMID: 25401495 PMCID: PMC4234667 DOI: 10.1371/journal.pone.0113097] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 10/19/2014] [Indexed: 02/05/2023] Open
Abstract
Vibrio tapetis causes the brown ring disease in the Japanese clam Ruditapes philippinarum while Vibrio aestuarianus is associated with massive oyster mortalities. As extracellular proteins are often associated with the virulence of pathogenic bacteria, we undertook a proteomic approach to characterize the secretomes of both vibrios. The extracellular proteins (ECPs) of both species were fractionated by SEC-FPLC and in vitro assays were performed to measure the effects of each fraction on hemocyte cellular parameters (phagocytosis and adhesion). Fractions showing a significant effect were subjected to SDS-PAGE, and proteins were identified by nano LC-MS/MS. 45 proteins were identified for V. aestuarianus and 87 for V. tapetis. Most of them belonged to outer membrane or were periplasmic, including porins or adhesins that were already described as virulence factors in other bacterial species. Others were transporter components, flagella proteins, or proteins of unknown function (14 and 15 respectively). Interestingly, for V. aestuarianus, we noted the secretion of 3 extracellular enzymes including the Vam metalloprotease and two other enzymes (one putative lipase and one protease). For V. tapetis, we identified five extracellular enymes, i.e. two different endochitinases, one protease, one lipase and an adhesin. A comparison of both secretomes also showed that only the putative extracellular lipase was common to both secretomes, underscoring the difference in pathogenicity mechanisms between these two species. Overall, these results characterize for the first time the secretomes of these two marine pathogenic vibrios and constitute a useful working basis to further analyze the contribution of specific proteins in the virulence mechanisms of these species.
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Affiliation(s)
- Stéphanie Madec
- Laboratoire Universitaire de Biodiversité et Ecologie Microbienne (EA3882), SFR48 ScInBios, Université de Bretagne Occidentale (UBO), UEB, ESIAB, Technopôle Brest Iroise, 29280, Plouzané, France
| | - Vianney Pichereau
- Laboratoire des Sciences de l’Environnement Marin, UMR 6539 UBO/CNRS/IRD/Ifremer, Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer, Technopôle Brest Iroise, 29280, Plouzané, France
| | - Annick Jacq
- Institut de Génétique et de Microbiologie, UMR8621, CNRS-Université Paris-Sud, 91405, Orsay, France
| | - Mathieu Paillard
- Laboratoire des Sciences de l’Environnement Marin, UMR 6539 UBO/CNRS/IRD/Ifremer, Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer, Technopôle Brest Iroise, 29280, Plouzané, France
| | - Claire Boisset
- Centre de Recherche sur les macromolécules végétales, CERMAV-CNRS, BP53, 38041 Grenoble, France
| | - Fabienne Guérard
- Laboratoire des Sciences de l’Environnement Marin, UMR 6539 UBO/CNRS/IRD/Ifremer, Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer, Technopôle Brest Iroise, 29280, Plouzané, France
| | - Christine Paillard
- Laboratoire des Sciences de l’Environnement Marin, UMR 6539 UBO/CNRS/IRD/Ifremer, Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer, Technopôle Brest Iroise, 29280, Plouzané, France
| | - Jean-Louis Nicolas
- Laboratoire des Sciences de l’Environnement Marin, UMR 6539 UBO/CNRS/IRD/Ifremer, Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer, Technopôle Brest Iroise, 29280, Plouzané, France
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Hatje E, Neuman C, Stevenson H, Bowman JP, Katouli M. Population dynamics of Vibrio and Pseudomonas species isolated from farmed Tasmanian Atlantic salmon (Salmo salar L.): a seasonal study. Microb Ecol 2014; 68:679-687. [PMID: 25027277 DOI: 10.1007/s00248-014-0462-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Accepted: 07/04/2014] [Indexed: 06/03/2023]
Abstract
Vibrio and Pseudomonas species have been shown to be part of the normal microbiota of Atlantic salmon (Salmo salar L.), with some strains causing disease in fish. The factors affecting their prevalence and persistence in the salmon gut, however, have not been well studied. In this study, we collected 340 Vibrio and 150 Pseudomonas isolates from the hindgut of farmed Tasmanian Atlantic salmon, fed with two commercially available diets. Samples were collected every 6-8 weeks between July 2011 and May 2012. Isolates from selective agar were initially identified using biochemical tests and confirmed using genus-specific primers and 16S ribosomal RNA (16S rRNA) sequencing. Random amplified polymorphic DNA (RAPD) PCR was used to type both Pseudomonas and Vibrio; the latter was further typed using a biochemical fingerprinting method (PhP-RV plates). We observed low species diversity with strains comprising Vibrio ichthyoenteri/Vibrio scophthalmi, Vibrio crassostreae/Vibrio splendidus, Aliivibrio finisterrensis, Photobacterium phosphoreum and Pseudomonas fragi. Out of 340 Vibrio isolates, 238 (70 %) belonged to 21 clonal types and were found predominantly during summer when water temperatures reached 15 to 21 °C. Of these, the four major clonal types were found in multiple samples (70 %). P. fragi, on the other hand, was only found during the colder water temperatures and belonged to 18 clonal types. The presence of both groups of bacteria and their clonal types were independent of the fish diets used, suggesting that the water temperature was the main factor of the prevalence and persistence of these bacteria in the gut of Atlantic salmon.
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Affiliation(s)
- Eva Hatje
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, 4558, Australia
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MORRIS JG. Control strategies for vibrios: borrowing from the Japanese experience. Epidemiol Infect 2014; 142:2248-50. [PMID: 25078101 PMCID: PMC9151286 DOI: 10.1017/s0950268814001526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 05/19/2014] [Accepted: 05/28/2014] [Indexed: 11/06/2022] Open
Affiliation(s)
- J. G. MORRIS
- Emerging Pathogens Institute, University of Florida, FL, USA
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50
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Kim JY, Lee JL. Multipurpose assessment for the quantification of Vibrio spp. and total bacteria in fish and seawater using multiplex real-time polymerase chain reaction. J Sci Food Agric 2014; 94:2807-2817. [PMID: 24752974 PMCID: PMC4368387 DOI: 10.1002/jsfa.6699] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Revised: 04/08/2014] [Accepted: 04/14/2014] [Indexed: 06/03/2023]
Abstract
BACKGROUND This study describes the first multiplex real-time polymerase chain reaction assay developed, as a multipurpose assessment, for the simultaneous quantification of total bacteria and three Vibrio spp. (V. parahaemolyticus, V. vulnificus and V. anguillarum) in fish and seawater. The consumption of raw finfish as sushi or sashimi has been increasing the chance of Vibrio outbreaks in consumers. Freshness and quality of fishery products also depend on the total bacterial populations present. RESULTS The detection sensitivity of the specific targets for the multiplex assay was 1 CFU mL⁻¹ in pure culture and seawater, and 10 CFU g⁻¹ in fish. While total bacterial counts by the multiplex assay were similar to those obtained by cultural methods, the levels of Vibrio detected by the multiplex assay were generally higher than by cultural methods of the same populations. Among the natural samples without Vibrio spp. inoculation, eight out of 10 seawater and three out of 20 fish samples were determined to contain Vibrio spp. CONCLUSION Our data demonstrate that this multiplex assay could be useful for the rapid detection and quantification of Vibrio spp. and total bacteria as a multipurpose tool for surveillance of fish and water quality as well as diagnostic method.
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Affiliation(s)
- Ji Yeun Kim
- Department of Human Ecology, Food Science, College of Agriculture and Related Sciences, Delaware State UniversityDover, DE 19901, USA
| | - Jung-Lim Lee
- Department of Human Ecology, Food Science, College of Agriculture and Related Sciences, Delaware State UniversityDover, DE 19901, USA
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