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Draft Genome Sequences of Aeromonas schubertii Strains Isolated from Asian Seabass from Thailand. Microbiol Resour Announc 2022; 11:e0100721. [PMID: 34989613 PMCID: PMC8759401 DOI: 10.1128/mra.01007-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Aeromonas schubertii is a Gram-negative, rod-shaped bacterium. It is a rare species that has been reported in humans and aquatic animals. Here, we report the genome sequences of A. schubertii strains isolated from two mass mortality events in central Thailand that were associated with aquaculture of Asian seabass.
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Li T, Wang Z, Han H, Teng D, Mao R, Hao Y, Yang N, Wang X, Wang J. Dual Antibacterial Activities and Biofilm Eradication of a Marine Peptide-N6NH 2 and Its Analogs against Multidrug-Resistant Aeromonas veronii. Int J Mol Sci 2020; 21:E9637. [PMID: 33348848 PMCID: PMC7767178 DOI: 10.3390/ijms21249637] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/12/2020] [Accepted: 12/14/2020] [Indexed: 12/14/2022] Open
Abstract
Aeromonas veronii is one of the main pathogens causing various diseases in humans and animals. It is currently difficult to eradicate drug-resistant A. veronii due to the biofilm formation by conventional antibiotic treatments. In this study, a marine peptide-N6NH2 and its analogs were generated by introducing Orn or replacing with D-amino acids, Val and Pro; their enzymic stability and antibacterial/antibiofilm ability against multi-drug resistant (MDR) A. veronii ACCC61732 were detected in vitro and in vivo, respectively. The results showed that DN6NH2 more rapidly killed A. veronii ACCC61732 and had higher stability in trypsin, simulated gastric/intestinal fluid, proteinase K, and mouse serum than the parent peptide-N6NH2. DN6NH2 and other analogs significantly improved the ability of N6NH2 to penetrate the outer membrane of A. veronii ACCC61732. DN6NH2, N6PNH2 and V112N6NH2 protected mice from catheter-associated biofilm infection with MDR A. veronii ACCC61732, superior to N6NH2 and CIP. DN6NH2 had more potent efficacy at a dose of 5 μmol/kg (100% survival) in a mouse peritonitis model than other analogs (50-66.67%) and CIP (83.33%), and it inhibited the bacterial translocation, downregulated pro-inflammatory cytokines, upregulated the anti-inflammatory cytokine, and ameliorated multiple-organ injuries (including the liver, spleen, lung, and kidney). These data suggest that the analogs of N6NH2 may be a candidate for novel antimicrobial and antibiofilm agents against MDR A. veronii infections.
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Affiliation(s)
- Ting Li
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (T.L.); (Z.W.); (H.H.); (D.T.); (R.M.); (Y.H.); (N.Y.)
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Zhenlong Wang
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (T.L.); (Z.W.); (H.H.); (D.T.); (R.M.); (Y.H.); (N.Y.)
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Huihui Han
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (T.L.); (Z.W.); (H.H.); (D.T.); (R.M.); (Y.H.); (N.Y.)
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Da Teng
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (T.L.); (Z.W.); (H.H.); (D.T.); (R.M.); (Y.H.); (N.Y.)
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Ruoyu Mao
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (T.L.); (Z.W.); (H.H.); (D.T.); (R.M.); (Y.H.); (N.Y.)
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Ya Hao
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (T.L.); (Z.W.); (H.H.); (D.T.); (R.M.); (Y.H.); (N.Y.)
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Na Yang
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (T.L.); (Z.W.); (H.H.); (D.T.); (R.M.); (Y.H.); (N.Y.)
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Xiumin Wang
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (T.L.); (Z.W.); (H.H.); (D.T.); (R.M.); (Y.H.); (N.Y.)
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
- Chinese Herbal Medicine Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jianhua Wang
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (T.L.); (Z.W.); (H.H.); (D.T.); (R.M.); (Y.H.); (N.Y.)
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
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Sekizuka T, Inamine Y, Segawa T, Hashino M, Yatsu K, Kuroda M. Potential KPC-2 carbapenemase reservoir of environmental Aeromonas hydrophila and Aeromonas caviae isolates from the effluent of an urban wastewater treatment plant in Japan. ENVIRONMENTAL MICROBIOLOGY REPORTS 2019; 11:589-597. [PMID: 31106978 PMCID: PMC6851574 DOI: 10.1111/1758-2229.12772] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 05/16/2019] [Indexed: 06/09/2023]
Abstract
Aeromonas hydrophila and Aeromonas caviae adapt to saline water environments and are the most predominant Aeromonas species isolated from estuaries. Here, we isolated antimicrobial-resistant (AMR) Aeromonas strains (A. hydrophila GSH8-2 and A. caviae GSH8M-1) carrying the carabapenemase blaKPC-2 gene from a wastewater treatment plant (WWTP) effluent in Tokyo Bay (Japan) and determined their complete genome sequences. GSH8-2 and GSH8M-1 were classified as newly assigned sequence types ST558 and ST13, suggesting no supportive evidence of clonal dissemination. The strains appear to have acquired blaKPC-2 -positive IncP-6-relative plasmids (pGSH8-2 and pGSH8M-1-2) that share a common backbone with plasmids in Aeromonas sp. ASNIH3 isolated from hospital wastewater in the United States, A. hydrophila WCHAH045096 isolated from sewage in China, other clinical isolates (Klebsiella, Enterobacter and Escherichia coli), and wastewater isolates (Citrobacter, Pseudomonas and other Aeromonas spp.). In addition to blaKPC-2 , pGSH8M-1-2 carries an IS26-mediated composite transposon including a macrolide resistance gene, mph(A). Although Aeromonas species are opportunistic pathogens, they could serve as potential environmental reservoir bacteria for carbapenemase and AMR genes. AMR monitoring from WWTP effluents will contribute to the detection of ongoing AMR dissemination in the environment and might provide an early warning of potential dissemination in clinical settings and communities.
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Affiliation(s)
- Tsuyoshi Sekizuka
- Pathogen Genomics CenterNational Institute of Infectious Diseases1‐23‐1 Toyama, ShinjukuTokyo162‐8640Japan
| | - Yuba Inamine
- Pathogen Genomics CenterNational Institute of Infectious Diseases1‐23‐1 Toyama, ShinjukuTokyo162‐8640Japan
| | - Takaya Segawa
- Pathogen Genomics CenterNational Institute of Infectious Diseases1‐23‐1 Toyama, ShinjukuTokyo162‐8640Japan
| | - Masanori Hashino
- Pathogen Genomics CenterNational Institute of Infectious Diseases1‐23‐1 Toyama, ShinjukuTokyo162‐8640Japan
| | - Koji Yatsu
- Pathogen Genomics CenterNational Institute of Infectious Diseases1‐23‐1 Toyama, ShinjukuTokyo162‐8640Japan
| | - Makoto Kuroda
- Pathogen Genomics CenterNational Institute of Infectious Diseases1‐23‐1 Toyama, ShinjukuTokyo162‐8640Japan
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Liu C, Guo YM, Cao JZ, Zhang DF, Chang OQ, Li K, Wang F, Shi CB, Jiang L, Wang Q, Lin L. Detection and quantification of Aeromonas schubertii in Channa maculata by TaqMan MGB probe fluorescence real-time quantitative PCR. JOURNAL OF FISH DISEASES 2019; 42:109-117. [PMID: 30474192 DOI: 10.1111/jfd.12911] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 09/22/2018] [Accepted: 09/23/2018] [Indexed: 06/09/2023]
Abstract
Aeromonas schubertii is a major epidemiological agent that threatens cultured snakeheads (Channidae) and has caused great economic losses in fish-farming industries in China in recent years. In present study, a specific TaqMan minor groove binder (MGB) probe fluorescence real-time quantitative PCR (qPCR) assay was developed to rapidly detect and quantify A. schubertii. A pair of qPCR primers and a TaqMan MGB probe were selected from the rpoD gene, which were shown to be specific for A. schubertii. A high correlation coefficient (R2 = 0.9998) in a standard curve with a 103% efficiency was obtained. Moreover, the qPCR method's detection limit was as low as 18 copies/μl, which was 100 times more sensitive than that of conventional PCR. The detection results for the A. schubertii in pond water and fish tissue were consistent with those of the viable counts. Bacterial load changes detected by qPCR in different tissues of snakeheads infected with A. schubertii showed that the gills and intestines may be the entry for A. schubertii, and the spleen and kidney are major sites for A. schubertii replication. The established method in present study should be a useful tool for the early surveillance and quantitation of A. schubertii.
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Affiliation(s)
- Chun Liu
- College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei, China
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, Guangdong, China
| | - Yanming M Guo
- College of Medical Science and Technology, Heze University, Heze, Shandong, China
| | - Jizhen Z Cao
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, Guangdong, China
| | - De-Feng Zhang
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, Guangdong, China
| | - Ou-Qin Chang
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, Guangdong, China
| | - Kaibin Li
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, Guangdong, China
| | - Fang Wang
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, Guangdong, China
| | - Cun-Bin Shi
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, Guangdong, China
| | - Lan Jiang
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, Guangdong, China
| | - Qing Wang
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, Guangdong, China
| | - Li Lin
- College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei, China
- Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, Guangdong Provincial Key Laboratory of Waterfowl Healthy Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, China
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Liu ZG, Zheng AF, Chen MM, Lian YX, Zhang XK, Zhang SZ, Yu D, Li JK. Isolation and identification of pathogenic Aeromonas veronii from a dead Yangtze finless porpoise. DISEASES OF AQUATIC ORGANISMS 2018; 132:13-22. [PMID: 30530927 DOI: 10.3354/dao03288] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Diseases caused by Aeromonas veronii in freshwater fish have been widely reported, but other species such as aquatic mammals have probably been overlooked. Here, we identified one isolate of A. veronii from a Yangtze finless porpoise Neophocaena asiaeorientalis asiaeorientalis exhibiting disease and mortality, and subsequently confirmed its virulence in artificial infection of BALB/c mice. The bacterial isolate was identified as A. veronii based on physiological, biochemical, and phenotypic features, and homology of the 16S rRNA, cpn60, rpoB, dnaJ and gyrB genes. Our results expand the known host spectrum of A. veronii, which is of great importance for the etiology of porpoise, dolphin, and other cetacean diseases.
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Affiliation(s)
- Z G Liu
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, PR China
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Liu C, Chang OQ, Zhang DF, Li KB, Wang F, Lin MH, Shi CB, Jiang L, Wang Q, Bergmann SM. Aeromonas shuberti as a cause of multi-organ necrosis in internal organs of Nile tilapia, Oreochromis niloticus. JOURNAL OF FISH DISEASES 2018; 41:1529-1538. [PMID: 30039866 DOI: 10.1111/jfd.12848] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 06/06/2018] [Accepted: 06/07/2018] [Indexed: 06/08/2023]
Abstract
A disease with white spots in internal organs of Nile tilapia occurred in Zhanjiang, southern China. Multiple, white nodules, 0.8-2.2 mm in diameter, were scattered throughout the liver, spleen and kidney of diseased fish. Signs of nodules reproduced after artificial infection with the isolated strain. Isolated bacteria were Gram-negative, facultative anaerobic, motile, short rod-shaped, with a length of 1.2-2.2 μm. Morphological and biochemical tests, as well as phylogenetic analysis, all strongly indicated that the isolate from tilapia is identical to Aeromonas schubertii (A. schubertii) which temporary named LF1708 strain. Antibiotic sensitivity assays showed the LF1708 is sensitive to 24 of 27 tested antibiotics. Pathogenicity test revealed that the isolate at the dose of 3.75 × 106 CFU/g killed 100% of experimental tilapia within 2 days and the dose of 1 × 107 CFU/g killed 100% of experimental zebrafish within 1 day. Histopathology of diseased tilapia infected with A. schubertii showed numerous necrotic lesions widely distributed in spleen, liver and kidney, and infiltration with a large number of bacteria. To our knowledge, this was the first report that associated A. schubertii with mortality in tilapia.
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Affiliation(s)
- C Liu
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangdong, China
| | - O Q Chang
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangdong, China
| | - D F Zhang
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangdong, China
| | - K B Li
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangdong, China
| | - F Wang
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangdong, China
| | - M H Lin
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangdong, China
| | - C B Shi
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangdong, China
| | - L Jiang
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangdong, China
| | - Q Wang
- Key Laboratory of Fishery Drug Development of Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangdong, China
| | - S M Bergmann
- Institute of Infectology, Friedrich-Loffler-Institut (FLI), Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
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Khalifa AY, Bekhet G. First isolation and characterization of the pathogenic Aeromonas veronii bv. veronii associated with ulcerative syndrome in the indigenous Pelophylax ridibundus of Al-Ahsaa, Saudi Arabia. Microb Pathog 2018; 117:361-368. [DOI: 10.1016/j.micpath.2017.10.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 09/07/2017] [Accepted: 10/12/2017] [Indexed: 10/18/2022]
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Hovey KJ, Seiter EM, Johnson EE, Saporito RA. Sequestered Alkaloid Defenses in the Dendrobatid Poison Frog Oophaga pumilio Provide Variable Protection from Microbial Pathogens. J Chem Ecol 2018; 44:312-325. [PMID: 29427191 DOI: 10.1007/s10886-018-0930-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 01/26/2018] [Accepted: 01/29/2018] [Indexed: 11/29/2022]
Abstract
Most amphibians produce their own defensive chemicals; however, poison frogs sequester their alkaloid-based defenses from dietary arthropods. Alkaloids function as a defense against predators, and certain types appear to inhibit microbial growth. Alkaloid defenses vary considerably among populations of poison frogs, reflecting geographic differences in availability of dietary arthropods. Consequently, environmentally driven differences in frog defenses may have significant implications regarding their protection against pathogens. While natural alkaloid mixtures in dendrobatid poison frogs have recently been shown to inhibit growth of non-pathogenic microbes, no studies have examined the effectiveness of alkaloids against microbes that infect these frogs. Herein, we examined how alkaloid defenses in the dendrobatid poison frog, Oophaga pumilio, affect growth of the known anuran pathogens Aeromonas hydrophila and Klebsiella pneumoniae. Frogs were collected from five locations throughout Costa Rica that are known to vary in their alkaloid profiles. Alkaloids were isolated from individual skins, and extracts were assayed against both pathogens. Microbe subcultures were inoculated with extracted alkaloids to create dose-response curves. Subsequent spectrophotometry and cell counting assays were used to assess growth inhibition. GC-MS was used to characterize and quantify alkaloids in frog extracts, and our results suggest that variation in alkaloid defenses lead to differences in inhibition of these pathogens. The present study provides the first evidence that alkaloid variation in a dendrobatid poison frog is associated with differences in inhibition of anuran pathogens, and offers further support that alkaloid defenses in poison frogs confer protection against both pathogens and predators.
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Affiliation(s)
- Kyle J Hovey
- Department of Biology, John Carroll University, University Heights, OH, 44118, USA
| | - Emily M Seiter
- Department of Biology, John Carroll University, University Heights, OH, 44118, USA
| | - Erin E Johnson
- Department of Biology, John Carroll University, University Heights, OH, 44118, USA
| | - Ralph A Saporito
- Department of Biology, John Carroll University, University Heights, OH, 44118, USA.
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First record of the rare species Aeromonas schubertii from mussels: phenotypic and genetic reevaluation of the species and a review of the literature. Arch Microbiol 2016; 198:333-45. [DOI: 10.1007/s00203-016-1189-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 12/17/2015] [Accepted: 01/08/2016] [Indexed: 10/22/2022]
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Dias C, Serra CR, Simões LC, Simões M, Martinez-Murcia A, Saavedra MJ. Extended-spectrum β-lactamase and carbapenemase-producing Aeromonas species in wild animals from Portugal. Vet Rec 2014; 174:532. [PMID: 24728490 DOI: 10.1136/vr.101803] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- C Dias
- Veterinary and Animal Science Research Centre, Carla Dias, Centre for the Research and Technology for Agro-Environment and Biological Sciences, University of Trás-os-Montes e Alto Douro, Vila Real 5000-801, Portugal
| | - C R Serra
- Veterinary and Animal Science Research Centre, Carla Dias, Centre for the Research and Technology for Agro-Environment and Biological Sciences, University of Trás-os-Montes e Alto Douro, Vila Real 5000-801, Portugal
| | - L C Simões
- IBB - Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Braga 4710-057, Portugal LEPAE - Department of Chemical Engineering, Faculty of Engineering, University of Porto, Porto 4200-465, Portugal
| | - M Simões
- LEPAE - Department of Chemical Engineering, Faculty of Engineering, University of Porto, Porto 4200-465, Portugal
| | - A Martinez-Murcia
- Area de Microbiología, EPSO, Universidad Miguel Hernández, Orihuela E-03300, Alicante, Spain
| | - M J Saavedra
- Veterinary and Animal Science Research Centre, Carla Dias, Centre for the Research and Technology for Agro-Environment and Biological Sciences, University of Trás-os-Montes e Alto Douro, Vila Real 5000-801, Portugal Department of Veterinary Sciences, School of Agriculture and Veterinary Science, University of Trás-os-Montes e Alto Douro, Vila Real 5000-801, Portugal
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11
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Phenotypic variation and morphological changes in starved denitrifying Aeromonas hydrophila. ANN MICROBIOL 2012. [DOI: 10.1007/s13213-012-0560-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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12
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Harikrishnan R, Kim MC, Kim JS, Han YJ, Jang IS, Balasundaram C, Heo MS. Immune response and expression analysis of cathepsin K in goldfish during Aeromonas hydrophila infection. FISH & SHELLFISH IMMUNOLOGY 2010; 28:511-516. [PMID: 20025977 DOI: 10.1016/j.fsi.2009.12.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2009] [Revised: 11/28/2009] [Accepted: 12/02/2009] [Indexed: 05/28/2023]
Abstract
The innate immunity and expression profiles of cathepsins D were determined in the goldfish (Carassius auratus) tissues after challenge with a fish pathogen Aeromonas hydrophila. The innate immunity of reactive oxygen species (ROS) and reactive nitrogen species (RNS) were determined by peripheral blood leucocytes. Blood and tissue samples of the muscle, gills, liver, kidney, heart, spleen, and intestine were sampled at 1, 3, 6 and 12 h post-infection for cathepsin D expression by semi-quantitative RT-PCR. The ROS and RNS production did not significantly increase at 1 h post-challenged goldfish. However, the ROS and RNS production was significantly increased after 3 h post-challenged fish compared to the control. The cathepsin D expression was found very low in muscle and kidney of the control fish, other tissues was not found the expression. A similar pattern was found in goldfish at 1 h post-challenge with A. hydrophila. However, at 3 h post-challenge goldfish, the cathepsin D expression was high only in the heart. At 6 h post-challenge goldfish, the cathepsin D expression was seen high all the tissues, except in the spleen. However, the expression was decreased at 12 h post-infection samples. This result was suggested that the goldfish infected with A. hydrophila decreased the innate immunity level in peripheral blood and expressed the cathepsin D in tissues.
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Affiliation(s)
- Ramasamy Harikrishnan
- Marine Applied Microbes and Aquatic Organism Disease Control Lab, Department of Aquatic Biomedical Sciences, School of Marine Biomedical Sciences, College of Ocean Sciences & Marine and Environmental Research Institute, Jeju National University, Jeju 690-756, South Korea.
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Xie ZY, Zhou YC, Wang SF, Mei B, Xu XD, Wen WY, Feng YQ. First isolation and identification of Elizabethkingia meningoseptica from cultured tiger frog, Rana tigerina rugulosa. Vet Microbiol 2009; 138:140-4. [PMID: 19327918 DOI: 10.1016/j.vetmic.2009.02.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2008] [Revised: 02/13/2009] [Accepted: 02/17/2009] [Indexed: 10/21/2022]
Abstract
Elizabethkingia meningoseptica has been recognised as an occasional but serious opportunistic bacterial pathogen to human beings. Recently, it was frequently isolated from tiger frog, Rana tigerina rugulosa, with cataract disease, which is the most common disease of unknown aetiology of frogs in Hainan, China. The purpose of this study was to identify and characterise the bacterial strains isolated from the recent outbreaks of cataract disease in farmed tiger frog in Hainan, China, and to evaluate their pathogenicity to the frog and their sensitivity to 20 chemotherapeutic agents. The 16S rRNA gene sequences of strains W0701 (1478bp), W0702 (1477bp) and W0703 (1478bp) showed 98.6-98.7% similarity with the sequence of E. meningoseptica type strain (ATCC 13253) and 99.9-100% similarity with that of E. meningoseptica NTU 870424-IL. Six strains (W0701-W0706) were selected to represent 24 isolates retrieved from six moribund frogs. The morphological, physiological and biochemical characteristics of the six representative isolates were consistent with those of E. meningoseptica strains. The organisms were only susceptible to vancomycin and moderately susceptible to cefoperazone among the 20 investigated chemotherapeutic agents. Virulence test with strain W0702 was conducted and pathogenicity (by intramuscular injection) was demonstrated in the tiger frog. In conclusion, 24 isolates obtained from frogs with cataract disease were the E. meningoseptica strains highly pathogenic to tiger frog, and this is the first report of E. meningoseptica as a pathogen for tiger frog.
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Affiliation(s)
- Zhen-Yu Xie
- Key Laboratory of Tropic Biological Resources, MOE, Hainan University, Haikou 570228, PR China
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Vivas J, Carracedo B, Riaño J, Razquin BE, López-Fierro P, Acosta F, Naharro G, Villena AJ. Behavior of an Aeromonas hydrophila aroA live vaccine in water microcosms. Appl Environ Microbiol 2004; 70:2702-8. [PMID: 15128521 PMCID: PMC404459 DOI: 10.1128/aem.70.5.2702-2708.2004] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2003] [Accepted: 01/20/2004] [Indexed: 01/04/2023] Open
Abstract
Genetically modified auxotrophic mutants of different fish pathogens have been used as live vaccines in laboratory experiments, but the behavior of the strains after release into aquatic ecosystems has not been characterized. We previously constructed and characterized an aroA mutant of Aeromonas hydrophila and studied the protection afforded by this mutant as a live vaccine in rainbow trout. In this work, we describe the survival of this strain in aquatic microcosms prepared from fish water tanks. The aroA mutant disappeared rapidly in nonfiltered, nonautoclaved fish tank water, declining below detection levels after 15 days, suggesting an inhibitory effect of the autochthonous microflora of the water. When the aroA strain was used to inoculate sterilized water, its culturability was lower than that of wild-type strain A. hydrophila AG2; after long periods of incubation, aroA cells were able to enter a viable but nonculturable state. Entry into this nonculturable state was accompanied by changes in the cell morphology from rods to spheres, but the cells appeared to remain potentially viable, as assessed by the preservation of cell membrane integrity. Supplementation of the culture medium with sodium pyruvate favored the culturability and resuscitation of the two A. hydrophila strains at low temperatures (6 and 16 degrees C). These results contribute to a better understanding of the behavior of the aroA strain in natural environments and suggest that the inactivation of the aroA gene may be beneficial for the safety of this live vaccine for aquacultures.
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Affiliation(s)
- José Vivas
- Department of Cell Biology, Faculty of Biological and Environmental Sciences, Arucas, Spain
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Huys G, Pearson M, Kämpfer P, Denys R, Cnockaert M, Inglis V, Swings J. Aeromonas hydrophila subsp. ranae subsp. nov., isolated from septicaemic farmed frogs in Thailand. Int J Syst Evol Microbiol 2003; 53:885-891. [PMID: 12807217 DOI: 10.1099/ijs.0.02357-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A group of seven sucrose-negative Aeromonas strains (referred to as group Au) isolated from the internal organs of septicaemic farmed frogs (Rana rugulosa) in Thailand was subjected to a polyphasic taxonomic study including fluorescent amplified fragment length polymorphism (FAFLP) and ERIC-PCR fingerprinting, 16S rDNA sequencing, microplate DNA-DNA hybridizations and extensive phenotypic characterization. Comparison of FAFLP and ERIC-PCR fingerprints indicated that the group Au isolates belonged to the species Aeromonas hydrophila DNA hybridization group (HG) 1 in which they represent a genotypic subgroup closely affiliated to A. hydrophila subsp. hydrophila and subsp. dhakensis. One representative of the Au group exhibited > or = 99.0% 16S rDNA sequence similarity with the type strains of the two A. hydrophila subspecies. DNA-DNA hybridization with type and reference strains of all known Aeromonas taxa revealed that the Au group represented a homogeneous taxon that exhibited the highest relatedness with members of the two A. hydrophila subspecies, ranging from 75 to 93%. Phenotypic characterization on the basis of 152 features further revealed that the Au group isolates differed from A. hydrophila subsp. hydrophila or subsp. dhakensis in a total of 13 biochemical properties. Of these, assimilation of L-glycine and isobutyrate as sole carbon source, acid production from salicin and D-sucrose, and aesculin hydrolysis were of diagnostic value. From the results of this study, it can be concluded that the Aeromonas frog isolates of the Au group represent a new subspecies of A. hydrophila, for which the name Aeromonas hydrophila subsp. ranae subsp. nov. is proposed. Its type strain is Au-1D12(T) (=LMG 19707(T) = CCUG 46211(T)).
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Affiliation(s)
- Geert Huys
- Laboratorium voor Microbiologie, Ghent University, K.L. Ledeganckstr. 35, B-9000 Ghent, Belgium
| | - Marianne Pearson
- Institute of Aquaculture, University of Stirling, Stirling FK9 4LA, UK
| | - Peter Kämpfer
- Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, IFZ, Heinrich-Buff-Ring 26-32, D-35392 Giessen, Germany
| | - Rik Denys
- Laboratorium voor Microbiologie, Ghent University, K.L. Ledeganckstr. 35, B-9000 Ghent, Belgium
| | - Margo Cnockaert
- Laboratorium voor Microbiologie, Ghent University, K.L. Ledeganckstr. 35, B-9000 Ghent, Belgium
| | - Valerie Inglis
- Institute of Aquaculture, University of Stirling, Stirling FK9 4LA, UK
| | - Jean Swings
- Laboratorium voor BCCMTM/LMG Bacteria Collection, Ghent University, K.L. Ledeganckstr. 35, B-9000 Ghent, Belgium
- Laboratorium voor Microbiologie, Ghent University, K.L. Ledeganckstr. 35, B-9000 Ghent, Belgium
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