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Abdallah ESH, Metwally WGM, Abdel-Rahman MAM, Albano M, Mahmoud MM. Streptococcus agalactiae Infection in Nile Tilapia ( Oreochromis niloticus): A Review. BIOLOGY 2024; 13:914. [PMID: 39596869 PMCID: PMC11591708 DOI: 10.3390/biology13110914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2024] [Revised: 10/29/2024] [Accepted: 11/07/2024] [Indexed: 11/29/2024]
Abstract
Streptococcus agalactiae (Group B Lancefield) has emerged as a significant pathogen affecting both humans and animals, including aquatic species. Infections caused by S. agalactiae are becoming a growing concern in aquaculture and have been reported globally in various freshwater and marine fish species, particularly those inhabiting warm water environments. This has led to numerous outbreaks with high morbidity and mortality in fish. Nile tilapia (Oreochromis niloticus), a member of the Cichlid family, is one of the severely affected fish species by S. agalactiae. The current study aims to focus on S. agalactiae infection in cultured O. niloticus with reference to its transmission and sources of infection; risk factors influencing GBS infection, disease clinical signs, lesions, and pathogenesis; S. agalactiae virulence factors; and how to diagnose, treat, control, and prevent infection including vaccination and herbal extract medication.
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Affiliation(s)
- Ebtsam Sayed Hassan Abdallah
- Aquatic Animal Medicine and Management Department, Faculty of Veterinary Medicine, Assiut University, Assiut 71529, Egypt; (E.S.H.A.); (M.M.M.)
| | | | | | - Marco Albano
- Department of Veterinary Sciences, University of Messina, Polo Universitario Dell’Annunziata, 98168 Messina, Italy
| | - Mahmoud Mostafa Mahmoud
- Aquatic Animal Medicine and Management Department, Faculty of Veterinary Medicine, Assiut University, Assiut 71529, Egypt; (E.S.H.A.); (M.M.M.)
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Zhang L, Hong Y, Sun K, Zhao S, Bai Y, Yang S, Tao J, Shi F, Zhan F, Lin L, Qin Z. Passive protection of chicken egg yolk immunoglobulin (IgY) against Streptococcus agalactiae infection in Nile tilapia (Oreochromis niloticus). FISH & SHELLFISH IMMUNOLOGY 2024; 154:109923. [PMID: 39326687 DOI: 10.1016/j.fsi.2024.109923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2024] [Revised: 09/23/2024] [Accepted: 09/24/2024] [Indexed: 09/28/2024]
Abstract
IgY is an immunoglobulin primarily found in the serum and egg yolk of birds, amphibians, and reptiles. Recent years, IgY is considered to have a good application prospect in the immunodiagnostics and passive immunotherapy of aquatic diseases. In this study, we prepared a specific IgY against Streptococcus agalactiae in tilapia after immunizing the hens for 4 times. The result of ELISA detection showed that the IgY titers in water-soluble fraction (WSF) after 6 weeks of immunization reached 1:51200 and last for 4 weeks. Western blot (WB) analysis data showed that the specific IgY could recognize the target band, the specific IgY showed a concentration-dependent inhibitory effect on the growth of S. agalactiae, altered cell wall structure and aggluted of S. agalactiae. The quantitative reverse transcription PCR (qRT-PCR) analysis data suggested that the specific IgY downregulated the expression of pro-inflammatory factors (IL-8, TNF-α), upregulated the anti-inflammatory factors (IL-10, TGF-β). In addition, the histopathological results showed that the specific IgY significantly decreased the pathological manifestations, dramatically improved the survival rates of tilapia in injection, feeding, and immersion experiments. Collectively, our findings demonstrated that the broad potential of specific IgY for the prevention and treatment of S. agalactiae infection in tilapia.
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Affiliation(s)
- Linpeng Zhang
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Yucong Hong
- Guangdong Provincial Key Laboratory of Aquatic Larvae Feed, Guangdong Yuequn Ocean Biotechnology Co., Ltd, Jieyang, Guangdong, 515500, China
| | - Kaihui Sun
- Guangdong Provincial Key Laboratory of Aquatic Larvae Feed, Guangdong Yuequn Ocean Biotechnology Co., Ltd, Jieyang, Guangdong, 515500, China
| | - Shuyan Zhao
- Guangdong Provincial Key Laboratory of Aquatic Larvae Feed, Guangdong Yuequn Ocean Biotechnology Co., Ltd, Jieyang, Guangdong, 515500, China
| | - Yanhan Bai
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Shiyi Yang
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Junjie Tao
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Fei Shi
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Fanbin Zhan
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Li Lin
- Guangdong Provincial Key Laboratory of Aquatic Larvae Feed, Guangdong Yuequn Ocean Biotechnology Co., Ltd, Jieyang, Guangdong, 515500, China; Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China.
| | - Zhendong Qin
- Guangdong Provincial Key Laboratory of Aquatic Larvae Feed, Guangdong Yuequn Ocean Biotechnology Co., Ltd, Jieyang, Guangdong, 515500, China; Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China.
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Himananto O, Yoohat K, Danwisetkanjana K, Kumpoosiri M, Rukpratanporn S, Theppawong Y, Sukchai N, Siripaitoon S, Areechon N, Unajak S, Gajanandana O. Strep Easy Kit; a bio-enrichment dual ICG-strip test for simultaneous detection of Streptococcus agalactiae serotypes Ia and III in fish samples. JOURNAL OF FISH DISEASES 2024; 47:e14000. [PMID: 39010687 DOI: 10.1111/jfd.14000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 05/31/2024] [Accepted: 06/06/2024] [Indexed: 07/17/2024]
Abstract
The Strep Easy Kit, a bio-enrichment dual ICG-strip test, is a diagnostic tool designed for the detection of Streptococcus agalactiae, an important pathogenic bacterium in tilapia farming. The kit can simultaneously identify two different serotypes of S. agalactiae, serotype Ia and serotype III. This capability is crucial for the collection of valuable epidemiological data and facilitates strategic planning for effective vaccine development and deployment. The Strep Easy Kit consists of two main steps: pathogen enrichment and pathogen detection. The enrichment step increases the concentration of bacteria so that the bacterial load is raised to the level reliably detectable by the subsequent ICG strip test. This is achieved by incubating the fish samples in a suitable liquid medium under specified temperature and time conditions. The second step involves the use of the dual-ICG strip test. This strip test consists of two monoclonal antibodies and one polyclonal antibody that are specific to S. agalactiae and can distinguish between S. agalactiae serotype Ia and S. agalactiae serotype III. This dual capability enables the ICG strip test to simultaneously detect both serotypes of S. agalactiae in a single test kit. The detection limit of the test kit, which consists of a dual ICG-Strip test combined with an enrichment step, is 100 CFU/mL. The kit can be used to detect S. agalactiae in both live and dead fish samples, making it versatile for various testing scenarios. The test results obtained using the Strep Easy Kit have shown a 94.4% correlation with the standard method (Thai Agricultural Standard; TAS 10453-2010), with 90.2% sensitivity and 100% specificity. Significant advantages of the Strep Easy Kit lie in its simplicity and portability, allowing farmers to perform the test by themselves and on-site. This makes it a practical and accessible tool for the tilapia farming industry.
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Affiliation(s)
- Orawan Himananto
- Monoclonal and Antibody Production Research Team, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
| | - Kirana Yoohat
- Monoclonal and Antibody Production Research Team, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
| | - Kannawat Danwisetkanjana
- Monoclonal and Antibody Production Research Team, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
| | - Mallika Kumpoosiri
- Monoclonal and Antibody Production Research Team, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
| | - Sombat Rukpratanporn
- Monoclonal and Antibody Production Research Team, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
| | - Yada Theppawong
- Monoclonal and Antibody Production Research Team, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
| | - Nanthita Sukchai
- Monoclonal and Antibody Production Research Team, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
| | - Sirima Siripaitoon
- Monoclonal and Antibody Production Research Team, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
| | - Nontawith Areechon
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Bangkok, Thailand
| | - Sasimanas Unajak
- Department of Biochemistry, Faculty of Science, Kasetsart University, Bangkok, Thailand
- Kasetsart Vaccines and Bio-Product Innovation Centre, Kasetsart University, Bangkok, Thailand
| | - Oraprapai Gajanandana
- Monoclonal and Antibody Production Research Team, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
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Pan W, Fu J, Zeng R, Liang M, You Y, Zhan Z, Lu Z, Weng S, Guo C, He J. Evaluation of a Low-Temperature Immersion Immunization Strategy for the Infectious Spleen and Kidney Necrosis Virus orf037l Gene-Deleted Attenuated Vaccine. Vaccines (Basel) 2024; 12:1170. [PMID: 39460336 PMCID: PMC11511343 DOI: 10.3390/vaccines12101170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2024] [Revised: 09/30/2024] [Accepted: 10/10/2024] [Indexed: 10/28/2024] Open
Abstract
BACKGROUND Infectious spleen and kidney necrosis virus (ISKNV) poses a significant threat to aquaculture sustainability, particularly affecting mandarin fish (Siniperca chuatsi) and causing significant economic losses. METHODS To address this challenge, this study developed an ISKNV Δorf037l vaccine strain, where the orf037l gene was knocked out. Infection assays conducted at 28 °C showed that the knocking out the orf037l gene decreased the virulence of ISKNV and reduced lethality against mandarin fish by 26.7% compared to wild-type ISKNV. To further diminish residual virulence, the effect of low-temperature (22 °C) immersion immunization was evaluated. RESULTS The results indicate that low temperature significantly diminished the virulence of the Δorf037l vaccine strain, elevating the survival rate of mandarin fish to 90%. Furthermore, the vaccine strain effectively triggered the expression of crucial immune-related genes, such as IFN-h, IL-1, IκB, Mx, TNF-α, and Viperin, while inducing the production of specific neutralizing antibodies. Low-temperature immersion with Δorf037l achieved a high relative percentage of survival of 92.6% (n = 30) in mandarin fish, suggesting the potential of Δorf037l as a promising immersion vaccine candidate. CONCLUSIONS These findings contribute to advancing fish immersion vaccine development and demonstrate the importance and broad applicability of temperature optimization strategies in vaccine development. Our work carries profound implications for both the theoretical understanding and practical application in aquaculture disease control.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Changjun Guo
- School of Marine Sciences, State Key Laboratory for Biocontrol & Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Guangdong Province Key Laboratory of Aquatic Economic Animals/Guangdong Provincial Observation and Research Station for Marine Ranching of the Lingdingyang Bay, Sun Yat-sen University, 135 Xingang Road West, Guangzhou 510275, China; (W.P.); (J.F.); (Z.Z.)
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de Queiróz GA, Silva TMFE, Leal CAG. Duration of Protection and Humoral Immune Response in Nile Tilapia ( Oreochromis niloticus L.) Vaccinated against Streptococcus agalactiae. Animals (Basel) 2024; 14:1744. [PMID: 38929363 PMCID: PMC11200441 DOI: 10.3390/ani14121744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Revised: 06/03/2024] [Accepted: 06/06/2024] [Indexed: 06/28/2024] Open
Abstract
Streptococcosis caused by Streptococcus agalactiae (S. agalactiae) is a major bacterial disease affecting the production of Nile tilapia (Oreochromis niloticus L.), causing significant economic losses due to mortality in the growing phase. Vaccination is the most effective method for preventing streptococcosis on Nile tilapia farms. In Brazil, the major tilapia-producing regions have long production cycles (6-10 months) and harvest tilapias weighing over 900 g for fillet production. Thus, data on the duration of the humoral immune response and protection in farmed tilapia have not been reported or are poorly described. Furthermore, the efficiency of serological testing for the long-term monitoring of immune responses induced by vaccination against S. agalactiae has never been addressed. This study evaluated the duration of protection and humoral immune response induced in Nile tilapia vaccinated against S. agalactiae until 300 days post-vaccination (dpv). The immunization trial was composed of two groups: vaccinated (Vac), vaccinated intraperitoneally with a commercial vaccine, and unvaccinated (NonVac) group, injected fish with sterile saline solution. At 15, 30, 150, 180, 210, and 300 dpv, blood sampling was conducted to detect anti-S. agalactiae IgM antibodies using indirect Enzyme-Linked Immunosorbent Assay (ELISA), and the fish were challenged with pathogenic S. agalactiae to determine the duration of vaccine protection through relative percentage survival (RPS). Spearman's rank correlation was performed between the ELISA optical density (OD) of vaccinated tilapia and the duration of vaccine protection (RPS). The mean cumulative mortality in NonVac and Vac groups ranged from 65 to 90% and less than 35%, respectively. The average RPS was 71, 93, 94, 70, 86, and 67% at 15, 30, 150, 180, 210, and 300 dpv, respectively. RPS revealed that the vaccine provided protection from 15 to 300 dpv. The specific anti-S. agalactiae IgM antibody levels were significantly higher in the Vac group than that non-Vac group up to 180 dpv. The vaccinated fish exhibited significant protection for up to 10 months after vaccination. There was a positive correlation between the antibody response and RPS. This study revealed that a single dose of commercial vaccine administered to Nile tilapia can confer long-term protection against S. agalactiae and that indirect ELISA can monitor the duration of the humoral immune response for up to six months following vaccination. Finally, vaccine protection over six months can be associated with other components of the fish immune system beyond the humoral immune response by IgM antibodies.
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Affiliation(s)
| | | | - Carlos Augusto Gomes Leal
- Department of Preventive Veterinary Medicine, Veterinary School, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (G.A.d.Q.); (T.M.F.e.S.)
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Soontara C, Uchuwittayakul A, Kayansamruaj P, Amparyup P, Wongpanya R, Srisapoome P. Adjuvant Effects of a CC Chemokine for Enhancing the Efficacy of an Inactivated Streptococcus agalactiae Vaccine in Nile Tilapia ( Oreochromis niloticus). Vaccines (Basel) 2024; 12:641. [PMID: 38932370 PMCID: PMC11209360 DOI: 10.3390/vaccines12060641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 06/05/2024] [Accepted: 06/06/2024] [Indexed: 06/28/2024] Open
Abstract
In this study, the ability of a CC chemokine (On-CC1) adjuvant to enhance the efficacy of a formalin-killed Streptococcus agalactiae vaccine (WC) in inducing immune responses against S. agalactiae in Nile tilapia was investigated through immune-related gene expression analysis, enzyme-linked immunosorbent assay (ELISA), transcriptome sequencing, and challenge tests. Significantly higher S. agalactiae-specific IgM levels were detected in fish in the WC+CC group than in the WC alone or control groups at 8 days postvaccination (dpv). The WC vaccine group exhibited increased specific IgM levels at 15 dpv, comparable to those of the WC+CC group, with sustained higher levels observed in the latter group at 29 dpv and after challenge with S. agalactiae for 14 days. Immune-related gene expression analysis revealed upregulation of all target genes in the control group compared to those in the vaccinated groups, with notable differences between the WC and WC+CC groups at various time intervals. Additionally, transcriptome analysis revealed differential gene expression profiles between the vaccinated (24 and 96 hpv) and control groups, with notable upregulation of immune-related genes in the vaccinated fish. Differential gene expression (DGE) analysis revealed significant upregulation of immunoglobulin and other immune-related genes in the control group compared to those in the vaccinated groups (24 and 96 hpv), with distinct patterns observed between the WC and WC+CC vaccine groups. Finally, challenge with a virulent strain of S. agalactiae resulted in significantly higher survival rates for fish in the WC and WC+CC groups compared to fish in the control group, with a notable increase in survival observed in fish in the WC+CC group.
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Affiliation(s)
- Chayanit Soontara
- Laboratory of Aquatic Animal Health Management, Department of Aquaculture, Faculty of Fisheries, Kasetsart University, 50 Paholayothin Rd., Ladyao, Chatuchak, Bangkok 10900, Thailand; (C.S.); (A.U.); (P.K.)
- Center of Excellence in Aquatic Animal Health Management, Faculty of Fisheries, Kasetsart University, 50 Paholayothin Rd., Ladyao, Chatuchak, Bangkok 10900, Thailand
| | - Anurak Uchuwittayakul
- Laboratory of Aquatic Animal Health Management, Department of Aquaculture, Faculty of Fisheries, Kasetsart University, 50 Paholayothin Rd., Ladyao, Chatuchak, Bangkok 10900, Thailand; (C.S.); (A.U.); (P.K.)
- Center of Excellence in Aquatic Animal Health Management, Faculty of Fisheries, Kasetsart University, 50 Paholayothin Rd., Ladyao, Chatuchak, Bangkok 10900, Thailand
| | - Pattanapon Kayansamruaj
- Laboratory of Aquatic Animal Health Management, Department of Aquaculture, Faculty of Fisheries, Kasetsart University, 50 Paholayothin Rd., Ladyao, Chatuchak, Bangkok 10900, Thailand; (C.S.); (A.U.); (P.K.)
- Center of Excellence in Aquatic Animal Health Management, Faculty of Fisheries, Kasetsart University, 50 Paholayothin Rd., Ladyao, Chatuchak, Bangkok 10900, Thailand
| | - Piti Amparyup
- Marine Biotechnology Research Team, Integrative Aquaculture Biotechnology Research Group, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Paholyothin Road, Klong 1, Khlong Luang 12120, Thailand;
| | - Ratree Wongpanya
- Department of Biochemistry, Faculty of Science, Kasetsart University, 50 Ngamwongwan Road, Bangkok 10900, Thailand;
| | - Prapansak Srisapoome
- Laboratory of Aquatic Animal Health Management, Department of Aquaculture, Faculty of Fisheries, Kasetsart University, 50 Paholayothin Rd., Ladyao, Chatuchak, Bangkok 10900, Thailand; (C.S.); (A.U.); (P.K.)
- Center of Excellence in Aquatic Animal Health Management, Faculty of Fisheries, Kasetsart University, 50 Paholayothin Rd., Ladyao, Chatuchak, Bangkok 10900, Thailand
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Dong J, Zhang Y, Yang Q, Liu Y, Zhou S, Ai X. Fraxetin Targeting to Sortase A Decreases the Pathogenicity of Streptococcus agalactiae to Nile Tilapia. Animals (Basel) 2024; 14:1337. [PMID: 38731341 PMCID: PMC11083127 DOI: 10.3390/ani14091337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 04/09/2024] [Accepted: 04/27/2024] [Indexed: 05/13/2024] Open
Abstract
Sortase A (SrtA) is responsible for anchoring surface proteins to the cell wall, and has been identified as a promising target developing anti-infective drugs of Gram-positive bacteria. The aim of the study was to identify inhibitors of Streptococcus agalactiae (S. agalactiae) SrtA from natural compounds to overcome the spread of antibiotic resistance in aquaculture. Here, we found that the MIC of fraxetin against S. agalactiae was higher than 256 μg/mL, indicating that fraxetin had no anti- S. agalactiae activity. But fraxetin could dose-dependently decrease the activity of SrtA in vitro at concentrations ranging between 4-32 μg/mL by a fluorescence resonance energy transfer (FRET) assay. Moreover, the inhibition of SrtA by fraxetin decreased the anchoring of surface proteins with the LPXTG motif to the cell wall by detecting the immunofluorescence change of serine-rich repeat protein 1 (Srr1) on the bacterial cell surface. The results of fibronectin binding and cell adhesion assays indicated that fraxetin could significantly decrease the adhesion ability of S. agalactiae in a dose-dependent manner. The results were further proven by immunofluorescence staining. Animal challenge results showed that treatment with fraxetin could reduce the mortality of tilapia infected with S. agalactiae to 46.67%, indicating that fraxetin could provide a significant amount of protection to tilapia by inactivating SrtA. Taken together, these findings provided a novel inhibitor of S. agalactiae SrtA and a promising candidate for treating S. agalactiae infections in aquaculture.
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Affiliation(s)
- Jing Dong
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China
| | - Yuze Zhang
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China
- College of Food Science and Engineering, Bohai University, Jinzhou 121010, China
| | - Qiuhong Yang
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China
| | - Yongtao Liu
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China
| | - Shun Zhou
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China
| | - Xiaohui Ai
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China
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Wigraiboon S, Panchan R, Luang-In V, Ounjit W, Panase P, Sookying S, Sutthi N. Effects of Dietary Tuber Ethanolic Extract of Nut Grass ( Cyperus rotundus Linn.) on Growth, Immune Response, and Disease Resistance in Nile Tilapia ( Oreochromis niloticus). Animals (Basel) 2024; 14:503. [PMID: 38338145 PMCID: PMC10854675 DOI: 10.3390/ani14030503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/28/2024] [Accepted: 01/31/2024] [Indexed: 02/12/2024] Open
Abstract
Nut grass (Cyperus rotundus Linn.) is a weed that grows in all tropical, subtropical and temperate regions of the world, including areas where it grows on saline soil. This research was conducted to evaluate the effect of C. rotundus tuber extract in the diet on the growth performance and disease resistance of Nile tilapia. Various components of phytochemical importance of nut grass, including sugars/carbohydrates, terpenoids, tannins, and flavonoids were found in C. rotundus. Tilapia (n = 25 fish/group in triplicate) were fed with different levels of nut grass extract including 0 (control; T1), 0.4 (T2), 0.8 (T3), and 1.6 (T4) g/kg for 60 days in a completely randomized design (CRD) experiment. After the feeding trial, the highest weight gain and average daily gain (ADG) were observed in the T4 group, but it was not significantly different from T3 (Nile tilapia fed with a 0.8 g/kg) (p > 0.05). The lowest feed conversion ratio (FCR) was observed in the T3 group. Moreover, the fillet, crud lipid content, and blood chemical profiles (aspartate aminotransferase (AST), cholesterol, and malondialdehyde (MDA)) in fish fed with 1.6 g/kg were highest when compared in all groups. In addition, the T3 group presented with the immune response parameter found in red blood cells (RBC), lysozyme activity, and antioxidant (superoxide dismutase activity (SOD)) being higher than those of the control group (p < 0.05). The highest survival (93.33%) was observed in fish fed with 0.8 g/kg (T3) after a 14 day challenge with Streptococcus agalactiae. Thus, it was concluded that nut grass extract at 0.8 g/kg can be used to improve the growth performance and the tendency for resistance to S. agalactiae in Nile tilapia.
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Affiliation(s)
- Supranee Wigraiboon
- Department of Agricultural Technology, Faculty of Technology, Mahasarakham University, Maha Sarakham 44150, Thailand; (S.W.); (R.P.)
- Applied Animal and Aquatic Sciences Research Unit, Division of Fisheries, Faculty of Technology, Mahasarakham University, Maha Sarakham 44150, Thailand
| | - Ruamruedee Panchan
- Department of Agricultural Technology, Faculty of Technology, Mahasarakham University, Maha Sarakham 44150, Thailand; (S.W.); (R.P.)
- Applied Animal and Aquatic Sciences Research Unit, Division of Fisheries, Faculty of Technology, Mahasarakham University, Maha Sarakham 44150, Thailand
| | - Vijitra Luang-In
- Natural Antioxidant Innovation Research Unit, Department of Biotechnology, Faculty of Technology, Mahasarakham University, Maha Sarakham 44150, Thailand;
| | - Wilailak Ounjit
- Department of Sociology and Anthropology, Faculty of Humanities and Social Sciences, Mahasarakham University, Maha Sarakham 44150, Thailand;
| | - Paiboon Panase
- Fisheries Division, School of Agriculture and Natural Resources, University of Phayao, Phayao 56000, Thailand;
- Unit of Excellence Physiology and Sustainable Production of Terrestrial and Aquatic Animals (FF66-UoE014), School of Agriculture and Natural Resources, University of Phayao, Phayao 56000, Thailand;
| | - Sontaya Sookying
- Unit of Excellence Physiology and Sustainable Production of Terrestrial and Aquatic Animals (FF66-UoE014), School of Agriculture and Natural Resources, University of Phayao, Phayao 56000, Thailand;
- Division of Pharmaceutical Sciences, School of Pharmaceutical Sciences, University of Phayao, Phayao 56000, Thailand
| | - Nantaporn Sutthi
- Department of Agricultural Technology, Faculty of Technology, Mahasarakham University, Maha Sarakham 44150, Thailand; (S.W.); (R.P.)
- Applied Animal and Aquatic Sciences Research Unit, Division of Fisheries, Faculty of Technology, Mahasarakham University, Maha Sarakham 44150, Thailand
- Unit of Excellence Physiology and Sustainable Production of Terrestrial and Aquatic Animals (FF66-UoE014), School of Agriculture and Natural Resources, University of Phayao, Phayao 56000, Thailand;
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9
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Khunrang T, Pooljun C, Wuthisuthimethavee S. Correlation of Streptococcus agalactiae concentration on immune system and effective dose of inactivated vaccine for Chitralada 3 strain Nile tilapia (Oreochromis niloticus) in Thailand. BMC Vet Res 2023; 19:267. [PMID: 38082432 PMCID: PMC10712115 DOI: 10.1186/s12917-023-03835-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 11/30/2023] [Indexed: 12/18/2023] Open
Abstract
The main pathogen in the Nile tilapia (Oreochromis niloticus) culture, Streptococcus agalactiae, causes economic harm. Infected fish's immune systems worked to eliminate of the infection. This study demonstrated the effect of different bacterial concentrations on tilapia immunity and optimal vaccine concentration to induce immunity in Nile tilapia. The experiment was performed at 102, 104, 106, 108, and 1010 CFU/fish of S. agalactiae compared with the control (PBS) through intraperitoneal injection for 72 h. Fish that survived employed to gather blood, and immune responses were assessed through measures of the survival rate include blood smears, antibody titers, and immunoglobulin gene expression. The vaccine experiment investigated formalin-inactivated S. agalactiae vaccination and administered S. agalactiae injections for 14 days. The statistic revealed a significant difference (p < 0.05) in the 108 and 1010 CFU/fish injections with high survival rates (62.22% and 53.33%, respectively). Immunoglobulin gene expression was highly represented in the 1010 CFU/fish injection; antibody titers were significantly improved from the control group, and antibody levels were high in the 1010 CFU/fish injection. The analysis of blood cell types using the blood smear method revealed a progressive increase in leucocytes, particularly lymphocytes, neutrophils, and monocytes, in the treatment group compared to the control group. Moreover, the erythrocyte/leucocyte ratio decreased significantly in response to the high bacterial injection, indicating an increase in leucocytes. Conversely, the erythrocyte level stayed ed within at the 7.03-9.70 × 102 cell/ml and shown no significant difference (p > 0.05). The lymphocytes were almost two-fold in 1010 CFU/fish compared to 108 CFU/fish. As depicted in the lowest concentration of 106 CFU/fish, the vaccine performance had a high relative percent survival (RPS) at 86.67%. This research suggested that the tilapia infected with high S. agalactiae concentrations did not affect the mortality of the tilapia, and vaccine concentration was effective in 106 CFU/fish.
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Affiliation(s)
- Thanakorn Khunrang
- School of Agricultural Technology and Food Industry, Walailak University, Thasala District, Nakhon Si Thammarat, 80161, Thailand
- Center of Excellence for Aquaculture Technology and Innovation, Walailak University, Thasala District, Nakhon Si Thammarat, 80161, Thailand
| | - Chettupon Pooljun
- Akkhraratchakumari Veterinary College, Walailak University, Thasala District, Nakhon Si Thammarat, 80161, Thailand
- Research Center on One Health, Walailak University, Thasala District, Nakhon Si Thammarat, 80161, Thailand
| | - Suwit Wuthisuthimethavee
- School of Agricultural Technology and Food Industry, Walailak University, Thasala District, Nakhon Si Thammarat, 80161, Thailand.
- Center of Excellence for Aquaculture Technology and Innovation, Walailak University, Thasala District, Nakhon Si Thammarat, 80161, Thailand.
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10
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Phasunon R, Taengphu S, Panphut W, Chatchaiphan S, Dong HT, Senapin S. Improving the diagnosis of Streptococcus iniae using a novel probe-based qPCR assay combined with an enrichment step. JOURNAL OF FISH DISEASES 2023; 46:1391-1401. [PMID: 37723600 DOI: 10.1111/jfd.13857] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/07/2023] [Accepted: 08/28/2023] [Indexed: 09/20/2023]
Abstract
Streptococcus iniae is a bacterial pathogen that causes streptococcosis, leading to significant losses in fish aquaculture globally. This study reported a newly developed probe-based quantitative polymerase chain reaction (qPCR) method for the detection of S. iniae. The primers and probes were designed to target the lactate oxidase gene. The optimized method demonstrated a detection limit of 20 copies per reaction and was specific to S. iniae, as evidenced by no cross-reactivity when assayed against genetic materials extracted from 23 known aquatic animal pathogens, and fish samples infected with Streptococcus agalactiae or Streptococcus dysgalactiae. To validate the newly developed qPCR protocol with field samples, fish specimens were systematically investigated following the Food and Agriculture Organization of the United Nations & Network of Aquaculture Centres in Asia-Pacific three diagnostic levels approach, which integrated basic and advanced techniques for disease diagnosis, including observation of gross signs (level I), bacterial isolation (level II), qPCR and 16S rDNA sequencing (level III). The result showed that 7/7 affected farms (three Asian seabass farms and four tilapia farms) experiencing clinical signs of streptococcosis were diagnosed positive for S. iniae. qPCR assays using DNA extracted directly from fish tissue detected S. iniae in 11 out of 36 fish samples (30.6%), while 24 out of 36 samples (66.7%) tested positive after an enrichment step, including apparently healthy fish from affected farms. Bacterial isolation of S. iniae was only successful in a proportion of clinically diseased fish but not in healthy-looking fish from the same farm. Overall, the newly developed qPCR protocol combined with enrichment would be a useful tool for the diagnosis and surveillance of S. iniae infections in fish populations, thereby aiding in the disease control and prevention.
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Affiliation(s)
- Ramida Phasunon
- Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok, Thailand
| | - Suwimon Taengphu
- Fish Health Platform, Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Klong Luang, Pathum Thani, Thailand
| | - Wattana Panphut
- Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok, Thailand
| | - Satid Chatchaiphan
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Bangkok, Thailand
| | - Ha Thanh Dong
- Department of Food, Agriculture and Bioresources, Aquaculture and Aquatic Resources Management Program, Asian Institute of Technology (AIT), School of Environment, Resources and Development, Klong Luang, Pathum Thani, Thailand
| | - Saengchan Senapin
- Fish Health Platform, Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Klong Luang, Pathum Thani, Thailand
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11
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Rivas AV, dos Santos AGV, de Souza AB, Bueno Junior G, de Souza GF, de Souza EM, de Carvalho Nunes L, Viana KF. Bivalent Vaccine against Streptococcus agalactiae and Aeromonas hydrophila in Nile Tilapia ( Oreochromis niloticus): A Laboratory-Phase and Large-Scale Study. Animals (Basel) 2023; 13:3338. [PMID: 37958093 PMCID: PMC10650067 DOI: 10.3390/ani13213338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/22/2023] [Accepted: 09/26/2023] [Indexed: 11/15/2023] Open
Abstract
One of the main factors limiting tilapia's production is the occurrence of infections caused by Aeromonas and Streptococcus species. This work intended to evaluate a bivalent vaccine against A. hydrophila and S. agalactiae by intraperitoneal (i.p) administration in Nile tilapia (Oreochromis niloticus) in Brazil. The study was carried out in two phases: one in the laboratory, on a small scale, and from the results obtained, the study was expanded to a large scale in a production system in cages. The vaccine proved to be safe and effective in laboratory tests, with a vaccine efficacy (VE) of 93.66%. However, in large-scale tests with 12,000 tilapias, the VE was 59.14%, with a better food conversion ratio (1.54 kg) in the vaccinated group compared to the control group (1.27 kg). These results corroborate the efficiency of this tested vaccine; however, they indicate the need for field tests to attest to real protection.
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Affiliation(s)
- Açucena Veleh Rivas
- Vaccine Development Technology Laboratory, Latin American Institute of Life and Nature Sciences, Federal University of Latin American Integration, Foz do Iguaçu 85870-650, Brazil; (A.V.R.); (A.G.V.d.S.); (A.B.d.S.); (G.B.J.)
| | - Angelo Gabriel Vidal dos Santos
- Vaccine Development Technology Laboratory, Latin American Institute of Life and Nature Sciences, Federal University of Latin American Integration, Foz do Iguaçu 85870-650, Brazil; (A.V.R.); (A.G.V.d.S.); (A.B.d.S.); (G.B.J.)
| | - Adrieli Barboza de Souza
- Vaccine Development Technology Laboratory, Latin American Institute of Life and Nature Sciences, Federal University of Latin American Integration, Foz do Iguaçu 85870-650, Brazil; (A.V.R.); (A.G.V.d.S.); (A.B.d.S.); (G.B.J.)
| | - Gilson Bueno Junior
- Vaccine Development Technology Laboratory, Latin American Institute of Life and Nature Sciences, Federal University of Latin American Integration, Foz do Iguaçu 85870-650, Brazil; (A.V.R.); (A.G.V.d.S.); (A.B.d.S.); (G.B.J.)
| | | | | | - Louisiane de Carvalho Nunes
- Department of Veterinary Medicine, Agricultural Sciences and Engineer Center, Federal University of Espírito Santo, Alegre 29500-000, Brazil;
| | - Kelvinson Fernandes Viana
- Vaccine Development Technology Laboratory, Latin American Institute of Life and Nature Sciences, Federal University of Latin American Integration, Foz do Iguaçu 85870-650, Brazil; (A.V.R.); (A.G.V.d.S.); (A.B.d.S.); (G.B.J.)
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12
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Ekasari J, Mirza VN, Fauzi IA, Hashimoto K, Suprayudi MA. Evaluation of Growth and Health Performance of Juvenile Tilapia Oreochromis sp. Fed with Various Supplementation of Heat-Killed Lactobacillus plantarum. AQUACULTURE NUTRITION 2023; 2023:8860364. [PMID: 37649830 PMCID: PMC10465244 DOI: 10.1155/2023/8860364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 07/09/2023] [Accepted: 07/13/2023] [Indexed: 09/01/2023]
Abstract
Thus, this research was conducted to evaluate the supplementation of heat-killed Lactobacillus plantarum at higher dosages and investigate the effect of heat-killed L. plantarum supplementation on the challenges of Streptococcus agalactiae. A feeding trial was conducted for 90 (initial average body weight of 12.52-12.69 g) days, while a disease challenge was conducted for 17 days. Dietary treatments were formulated to have a ranging level of heat-killed L. plantarum L-137: (1) control treatment without heat-killed L. plantarum, (2) diet containing 10 mg/kg heat-killed L. plantarum L-137 preparation (LP20, which contains 20% heat-killed L. plantarum L-137), (3) diet containing 20 mg/kg LP20, (4) diet containing 100 mg/kg LP20, and (5) diet containing 250 mg/kg LP20. All the diets were formulated to have equal values of protein and energy. Dietary supplementation of heat-killed L. plantarum L-137 improved tilapia growth performance and higher robustness against S. agalactiae infection. Therefore, a 10-20 mg/kg LP20 feed supplementation level is recommended to support the tilapia growth. In addition, an LP20 dietary supplementation level of 250 mg/kg feed is recommended for higher protection against S. agalactiae.
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Affiliation(s)
- Julie Ekasari
- Department of Aquaculture, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia
| | - Vini Nur Mirza
- Department of Aquaculture, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia
| | - Ichsan Achmad Fauzi
- Department of Aquaculture, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia
| | | | - Muhammad Agus Suprayudi
- Department of Aquaculture, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia
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13
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Cao Y, Liu J, Liu G, Du H, Liu T, Wang G, Wang Q, Zhou Y, Wang E. Exploring the Immunoprotective Potential of a Nanocarrier Immersion Vaccine Encoding Sip against Streptococcus Infection in Tilapia ( Oreochromis niloticus). Vaccines (Basel) 2023; 11:1262. [PMID: 37515077 PMCID: PMC10383804 DOI: 10.3390/vaccines11071262] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 07/06/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
Tilapia, as one of the fish widely cultured around the world, is suffering severe impact from the streptococcus disease with the deterioration of the breeding environment and the increasing of breeding density, which brings serious economic loss to tilapia farming. In this study, the surface immunogenic protein (Sip) of Streptococcus agalactiae (S. agalactiae) was selected as the potential candidate antigen and connected with bacterial nano cellulose (BNC) to construct the nanocarrier subunit vaccine (BNC-rSip), and the immersion immune effects against S. agalactiae and Streptococcus iniae (S. iniae) in Nile tilapia were evaluated on the basis of the serum antibody level, non-specific enzyme activity, the immune-related gene expression and relative percent survival (RPS). The results indicated that Sip possessed the expected immunogenicity according to the immunoinformatic analysis. Compared with the rSip group, BNC-rSip significantly induced serum antibody production and improved the innate immunity level of tilapia. After challenge, the RPS of BNC-rSip groups were 78.95% (S. agalactiae) and 67.86% (S. iniae), which were both higher than those of rSip groups,31.58% (S. agalactiae) and 35.71% (S. iniae), respectively. Our study indicated that BNC-rSip can induce protective immunity for tilapia through immersion immunization and may be an ideal candidate vaccine for controlling tilapia streptococcal disease.
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Affiliation(s)
- Ye Cao
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Key Laboratory of Aquatic Animal Immune Technology, Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
- Northwest A&F University Shenzhen Research Institute, Shenzhen 518000, China
- College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Jia Liu
- Northwest A&F University Shenzhen Research Institute, Shenzhen 518000, China
- College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Gaoyang Liu
- Northwest A&F University Shenzhen Research Institute, Shenzhen 518000, China
- College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Hui Du
- Northwest A&F University Shenzhen Research Institute, Shenzhen 518000, China
- College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Tianqiang Liu
- Northwest A&F University Shenzhen Research Institute, Shenzhen 518000, China
- College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Gaoxue Wang
- Northwest A&F University Shenzhen Research Institute, Shenzhen 518000, China
- College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Qing Wang
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Key Laboratory of Aquatic Animal Immune Technology, Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
| | - Ya Zhou
- College of Animal Science and Technology, Chongqing Three Gorges Vocational College, Chongqing 404155, China
| | - Erlong Wang
- Northwest A&F University Shenzhen Research Institute, Shenzhen 518000, China
- College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
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14
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Suwanbumrung D, Wongkhieo S, Keaswejjareansuk W, Dechbumroong P, Kamble MT, Yata T, Kitiyodom S, Rodkhum C, Thompson KD, Namdee K, Pirarat N. Oral delivery of a Streptococcus agalactiae vaccine to Nile tilapia (Oreochromis niloticus) using a novel cationic-based nanoemulsion containing bile salts. FISH & SHELLFISH IMMUNOLOGY 2023; 139:108913. [PMID: 37393062 DOI: 10.1016/j.fsi.2023.108913] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 06/08/2023] [Accepted: 06/21/2023] [Indexed: 07/03/2023]
Abstract
Streptococcus agalactiae is one of Thailand's most important pathogens in tilapia aquaculture. Vaccination is a very effective method for protecting fish against disease in aquaculture. Oral vaccination is an interesting route for vaccine delivery as it mimics the pathogenesis of S. agalactiae and provides convenient administration for mass vaccination of fish. Moreover, gut mucosal immunity is associated with a mucus layer on the gastrointestinal tract. Therefore, this study aimed to develop a novel cationic-based nanoemulsion vaccine containing bile salts (NEB) coated by chitosan (CS) and determined its physicochemical characterization, morphology, in vitro mucoadhesive property, permeability, and acid-base tolerance. In addition, the efficacy of NEB-CS as an oral vaccination for Nile tilapia was evaluated in order to investigate the innate immune response and protection against S. agalactiae. The groups of fish consisted of: (1) deionized water as a non-vaccinated control (Control); (2) an inactivated vaccine formulated from formalin-killed bacteria (IB); and (3) a novel cationic-based nanoemulsion vaccine containing bile salts (NEB) coated by chitosan (CS). The control, IB, and NEB-CS were incorporated into commercial feed pellets and fed to Nile tilapia. In addition, we evaluated the serum bactericidal activity (SBA) for 14 days post-vaccination (dpv) and protective efficacy for 10 days post-challenge, respectively. The mucoadhesiveness, permeability, and absorption within the tilapia intestine were also assessed in vivo. The NEB-CS vaccine appeared spherical, with the nanoparticles having a size of 454.37 nm and a positive charge (+47.6 mV). The NEB-CS vaccine had higher levels of mucoadhesiveness and permeability than the NEB (p < 0.05). The relative percentage survival (RPS) of IB and NEB-CS, when administered orally to fish, was 48% and 96%, respectively. Enhanced SBA was noted in the NEB-CS and IB vaccine groups compared to the control group. The results demonstrate that a feed-based NEB-CS can improve the mucoadhesiveness, permeability, and protective efficacy of the vaccine, and appear to be a promising approach to protecting tilapia in aquaculture against streptococcosis.
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Affiliation(s)
- Dharacha Suwanbumrung
- Wildlife, Exotic and Aquatic Animal Pathology Research Unit, Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Sudthirak Wongkhieo
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathumthani, 12120, Thailand
| | - Wisawat Keaswejjareansuk
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathumthani, 12120, Thailand
| | - Piroonrat Dechbumroong
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathumthani, 12120, Thailand
| | - Manoj Tukaram Kamble
- Wildlife, Exotic and Aquatic Animal Pathology Research Unit, Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Teerapong Yata
- Unit of Biochemistry, Department of Physiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Sirikorn Kitiyodom
- Wildlife, Exotic and Aquatic Animal Pathology Research Unit, Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Channarong Rodkhum
- Center of Excellence in Fish Diseases (CE FID), Department of Veterinary Microbiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Kim D Thompson
- Moredun Research Institute, Pentlands Science Park, Penicuik, EH26 0PZ, UK
| | - Katawut Namdee
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathumthani, 12120, Thailand.
| | - Nopadon Pirarat
- Wildlife, Exotic and Aquatic Animal Pathology Research Unit, Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, 10330, Thailand.
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15
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Song YL, Yao YY, Liu X, Tian TT, Ye JM, Zhang YA, Zhang XJ. Preparation of the monoclonal antibody against Nile tilapia Igλ and study on the Igλ + B cell subset in Nile tilapia. FISH & SHELLFISH IMMUNOLOGY 2023; 136:108705. [PMID: 36958505 DOI: 10.1016/j.fsi.2023.108705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/20/2023] [Accepted: 03/21/2023] [Indexed: 06/18/2023]
Abstract
Immunoglobulins (Igs) are important effector molecules that mediate humoral immunity. A typical Ig consists of two heavy and two light chains. In teleosts, three Ig heavy chain isotypes (Igμ, Igδ and Igτ) and three Ig light chain isotypes (Igκ, Igλ and Igσ) have been identified. Compared to the heavy chains, teleost Ig light chains have been poorly studied due to the lack of antibodies. In this study, a mouse anti-Nile tilapia Igλ monoclonal antibody (mAb) was prepared, which could specifically recognize Igλ in serum and Igλ+ B cells in tissues. Further, the composition of IgM+ and Igλ+ B cell subsets was analyzed using this antibody and a mouse anti-tilapia IgM heavy chain mAb. The ratio of IgM+Igλ+ B cells to total IgM+ B cells in head kidney and peripheral blood was about 30%, while that in spleen was about 50%; the ratio of IgM-Igλ+ B cells to total Igλ+ B cells in head kidney and peripheral blood was about 45%, while that in spleen was about 25%. The IgM-Igλ+ B cells was speculated to be IgT+ B cells. Finally, we detected an increase in the level of specific antibodies against the surface antigen-Sip of Streptococcus agalactiae in serum after S. agalactiae infection, indicating that mouse anti-tilapia Igλ mAb can be used to detect the antibody level after immunization of Nile tilapia, which lays a foundation for the evaluation of immunization effect of tilapia vaccine.
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Affiliation(s)
- Yan-Ling Song
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Yuan-Yuan Yao
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xun Liu
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Tian-Tian Tian
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Jian-Min Ye
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China; Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Yong-An Zhang
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Huazhong Agricultural University, Wuhan, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.
| | - Xu-Jie Zhang
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Huazhong Agricultural University, Wuhan, China.
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16
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Wangkahart E, Thongsrisuk A, Vialle R, Pholchamat S, Sunthamala P, Phudkliang J, Srisapoome P, Wang T, Secombes CJ. Comparative study of the effects of Montanide™ ISA 763A VG and ISA 763B VG adjuvants on the immune response against Streptococcus agalactiae in Nile tilapia (Oreochromis niloticus). FISH & SHELLFISH IMMUNOLOGY 2023; 134:108563. [PMID: 36717067 DOI: 10.1016/j.fsi.2023.108563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 01/02/2023] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
Streptococcus agalactiae is regarded as a major bacterial pathogen of farmed fish, with outbreaks in Nile tilapia causing significant losses. Vaccination is considered the most suitable method for disease control in aquaculture, with the potential to prevent such outbreaks if highly efficacious vaccines are available for use. Several vaccines have been produced to protect against S. agalactiae infection in tilapia, including inactivated vaccines, live attenuated vaccines, and subunit vaccines, with variable levels of protection seen. Two commercial adjuvants, Montanide™ ISA 763A VG and ISA 763B VG, have been developed recently and designed to improve the safety and efficacy of oil-based emulsions delivered by intraperitoneal injection. In particular, their mode of action may help identify and stimulate particular immunological pathways linked to the intended protective response, which is an important tool for future vaccine development. Therefore, this study aimed to characterize the potential of two adjuvanted-bacterial vaccines against S. agalactiae (SAIV) comparatively, to determine their usefulness for improving protection and to analyse the immune mechanisms involved. Nile tilapia were divided into four groups: 1) fish injected with PBS as a control, 2) fish injected with the SAIV alone, 3) fish injected with the SAIV + Montanide™ ISA 763A VG, and 4) fish injected with the SAIV + Montanide™ ISA 763B VG. Following immunization selected innate immune parameters were analysed, including serum lysozyme, myeloperoxidase, and bactericidal activity, with significantly increased levels seen after immunization. Cytokines associated with innate and adaptive immunity were also studied, with expression levels of several genes showing significant up-regulation, indicating good induction of cell-mediated immune responses. Additionally, the specific IgM antibody response against S. agalactiae was determined and found to be significantly induced post-vaccination, with higher levels seen in the presence of the adjuvants. In comparison to the protection seen with the unadjuvanted vaccine (61.29% RPS), both Montanide™ ISA 763A VG and Montanide™ ISA 763B VG improved the RPS, to 77.42% and 74.19% respectively. In conclusion, Montanide™ ISA 763A VG and Montanide™ ISA 763B VG have shown potential for use as adjuvants for fish vaccines against streptococcosis, as evidenced by the enhanced immunoprotection seen when given in combination with the SAIV vaccine employed in this study.
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Affiliation(s)
- Eakapol Wangkahart
- Laboratory of Fish Immunology and Nutrigenomics, Applied Animal and Aquatic Sciences Research Unit, Division of Fisheries, Faculty of Technology, Mahasarakham University, Khamriang Sub-District, Kantarawichai, Mahasarakham, 44150, Thailand.
| | - Areerat Thongsrisuk
- Laboratory of Fish Immunology and Nutrigenomics, Applied Animal and Aquatic Sciences Research Unit, Division of Fisheries, Faculty of Technology, Mahasarakham University, Khamriang Sub-District, Kantarawichai, Mahasarakham, 44150, Thailand
| | - Regis Vialle
- SEPPIC, Paris La Défense, 50 Boulevard National, CS 90020, 92257, La Garenne Colombes Cedex, France
| | - Sirinya Pholchamat
- Master of Science Program in Biotechnology & Biobusiness, Department of Biotechnology, Faculty of Technology, Mahasarakham University, Maha Sarakham, 44150, Thailand
| | - Phitcharat Sunthamala
- Master of Science Program in Biotechnology & Biobusiness, Department of Biotechnology, Faculty of Technology, Mahasarakham University, Maha Sarakham, 44150, Thailand
| | - Janjira Phudkliang
- Master of Science Program in Biotechnology & Biobusiness, Department of Biotechnology, Faculty of Technology, Mahasarakham University, Maha Sarakham, 44150, Thailand
| | - Prapansak Srisapoome
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Jatujak, Bangkok, 10900, Thailand
| | - Tiehui Wang
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
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Li S, Li W, Liang Q, Cao J, Li H, Li Z, Li A. Characterization and virulence of Streptococcus agalactiae deficient in SaeRS of the two-component system. Front Microbiol 2023; 14:1121621. [PMID: 37138609 PMCID: PMC10150079 DOI: 10.3389/fmicb.2023.1121621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 03/14/2023] [Indexed: 05/05/2023] Open
Abstract
There are a variety of regulatory systems in bacteria, among which the two-component system (TCS) can sense external environmental changes and make a series of physiological and biochemical reactions, which is crucial for the life activities of bacteria. As a member of TCS, SaeRS is considered to be an important virulence factor in Staphylococcus aureus, but its function in tilapia (Oreochromis niloticus)-derived Streptococcus agalactiae remains unknown. To explore the role of SaeRS in regulating virulence in the two-component system (TCS) of S. agalactiae from tilapia, ΔSaeRS mutant strain and CΔSaeRS complementary strain were constructed by homologous recombination. The results showed that the abilities of growth and biofilm formation of ΔSaeRS strain were significantly decreased when cultured in a brain heart infusion (BHI) medium (P < 0.01). Also, the survival rate of the ΔSaeRS strain in blood was decreased when compared with the wild strain S. agalactiae THN0901. Under the higher infection dose, the accumulative mortality of tilapia caused by the ΔSaeRS strain was significantly decreased (23.3%), of which THN0901 and CΔSaeRS strains were 73.3%. The results of competition experiments in tilapia showed that the invasion and colonization abilities of the ΔSaeRS strain were also dramatically lower than those of the wild strain (P < 0.01). Compared with the THN0901, the mRNA expression levels of virulence factors (fbsB, sip, cylE, bca, etc.) in the ΔSaeRS strain were significantly down-regulated (P < 0.01). SaeRS is one of the virulence factors of S. agalactiae. It plays a role in promoting host colonization and achieving immune evasion during the infection of tilapia, which provides a basis for exploring the pathogenic mechanism of S. agalactiae infected with tilapia.
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Affiliation(s)
- Shiyu Li
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory of Improved Variety Reproduction in Aquatic Economic Animals and Institute of Aquatic Economic Animals, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Wei Li
- Innovative Institute of Animal Healthy Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Qiancai Liang
- Agricultural Technology Promotion Center of Maoming City, Maoming, China
| | - Jizhen Cao
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory of Improved Variety Reproduction in Aquatic Economic Animals and Institute of Aquatic Economic Animals, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Han Li
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory of Improved Variety Reproduction in Aquatic Economic Animals and Institute of Aquatic Economic Animals, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Zhicheng Li
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory of Improved Variety Reproduction in Aquatic Economic Animals and Institute of Aquatic Economic Animals, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Anxing Li
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory of Improved Variety Reproduction in Aquatic Economic Animals and Institute of Aquatic Economic Animals, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
- *Correspondence: Anxing Li,
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18
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Du Y, Hu X, Miao L, Chen J. Current status and development prospects of aquatic vaccines. Front Immunol 2022; 13:1040336. [PMID: 36439092 PMCID: PMC9684733 DOI: 10.3389/fimmu.2022.1040336] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 10/26/2022] [Indexed: 11/11/2022] Open
Abstract
Diseases are a significant impediment to aquaculture's sustainable and healthy growth. The aquaculture industry is suffering significant financial losses as a result of the worsening water quality and increasing frequency of aquatic disease outbreaks caused by the expansion of aquaculture. Drug control, immunoprophylaxis, ecologically integrated control, etc. are the principal control strategies for fish infections. For a long time, the prevention and control of aquatic diseases have mainly relied on the use of various antibiotics and chemical drugs. However, long-term use of chemical inputs not only increases pathogenic bacteria resistance but also damages the fish and aquaculture environments, resulting in drug residues in aquatic products, severely impeding the development of the aquaculture industry. The development and use of aquatic vaccines are the safest and most effective ways to prevent aquatic animal diseases and preserve the health and sustainability of aquaculture. To give references for the development and implementation of aquatic vaccines, this study reviews the development history, types, inoculation techniques, mechanisms of action, development prospects, and challenges encountered with aquatic vaccines.
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Affiliation(s)
- Yang Du
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, China
- Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo, China
- Key Laboratory of Applied Marine Biotechnology of Ministry of Education, Ningbo University, Ningbo, China
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Xiaoman Hu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, China
- Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo, China
- Key Laboratory of Applied Marine Biotechnology of Ministry of Education, Ningbo University, Ningbo, China
| | - Liang Miao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, China
- Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo, China
- Key Laboratory of Applied Marine Biotechnology of Ministry of Education, Ningbo University, Ningbo, China
| | - Jiong Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, China
- Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo, China
- Key Laboratory of Applied Marine Biotechnology of Ministry of Education, Ningbo University, Ningbo, China
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19
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Kannika K, Sirisuay S, Kondo H, Hirono I, Areechon N, Unajak S. Trial Evaluation of Protection and Immunogenicity of Piscine Bivalent Streptococcal Vaccine: From the Lab to the Farms. Vaccines (Basel) 2022; 10:1625. [PMID: 36298490 PMCID: PMC9610196 DOI: 10.3390/vaccines10101625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/21/2022] [Accepted: 09/23/2022] [Indexed: 11/29/2022] Open
Abstract
Streptococcosis is one of the major diseases that causes devastation to farmed fish, leading to significant economic losses all around the world. Currently, two serotypes of Streptococcus agalactiae, serotype Ia and III, have been identified as virulent strains and major causative agents of the disease in farmed Nile tilapia (Oreochromis niloticus Linn.) in Thailand. Upon inactivated vaccine development, monovalent inactivated whole-cell vaccines demonstrated high specific antibody production against homologous serotypes and limited production with heterologous serotypes. However, for higher efficacy, a bivalent streptococcal vaccine was designed to maximize protective immunity to both serotypes. Interestingly, our bivalent vaccine could successfully induce specific antibody production against both serotypes with similar levels, and the response could extend over the 8 weeks of the experimental period. Evaluation of vaccines in the laboratory scale revealed relative percent survival (RPS) of vaccinated tilapia to serotype Ia (81.2 ± 9.4%) and serotype III (72.2 ± 4.8%), respectively. The efficacy of the bivalent vaccine showed significant RPS higher than the monovalent vaccine (p < 0.05) at 30 days, and the protection of all those vaccines was reduced thereafter. Evaluation of the vaccine in a farm trial in different locations in Thailand revealed the efficacy of the bivalent vaccine in increasing the production yield by greater than 80% in all tested farms in 2015 and 2021. Taken together, this study affirms the efficacy of the bivalent streptococcal vaccine in the prevention of streptococcus disease in Nile tilapia, which could be used in different areas. This vaccine development could be effectively applied in the tilapia culture industry.
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Affiliation(s)
- Korntip Kannika
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, 50 NgamWong Wan Road, Lat Yao, Chatuchak, Bangkok 10900, Thailand
| | - Soranut Sirisuay
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, 50 NgamWong Wan Road, Lat Yao, Chatuchak, Bangkok 10900, Thailand
| | - Hidehiro Kondo
- Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-Ku, Tokyo 108-8477, Japan
| | - Ikuo Hirono
- Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-Ku, Tokyo 108-8477, Japan
| | - Nontawith Areechon
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, 50 NgamWong Wan Road, Lat Yao, Chatuchak, Bangkok 10900, Thailand
| | - Sasimanas Unajak
- Department of Biochemistry, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan Road, Lat Yao, Chatuchak, Bangkok 10900, Thailand
- Kasetsart Vaccines and Bio-Product Innovation Centre, Kasetsart University, 50 Ngam Wong Wan Road, Chatuchak, Bangkok 10900, Thailand
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20
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Streptococcosis a Re-Emerging Disease in Aquaculture: Significance and Phytotherapy. Animals (Basel) 2022; 12:ani12182443. [PMID: 36139303 PMCID: PMC9495100 DOI: 10.3390/ani12182443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 09/07/2022] [Accepted: 09/12/2022] [Indexed: 11/25/2022] Open
Abstract
Simple Summary Streptococcosis is an economical important bacterial disease that can seriously cause huge losses in the global aquaculture sector. In recent years studies have focused on to use extracts or essences of medicinal herbs and plants to control or treat the disease outbreaks and, in most cases the results were promising. The essential oils of the herbs or plants are more effective than the extracts and, the extracts examined have moderate efficacy in term of increasing fish survival against fish streptococcosis that could be due to the enhancement of fish immunity by the herb bio-compounds. The lack of dosage optimization, toxicity and bioavailability assays of a specific herb/plant or its bioactive compound in fish organs make it difficult to judge the validation of clinical efficacy of a particular herb/plant against fish streptococcosis, and thus, required further investigations. Abstract Streptococcosis, particularly that caused by S. iniae and S. agalactiae, is a major re-emerging bacterial disease seriously affecting the global sustainability of aquaculture development. Despite a wide spread of the disease in aquaculture, few studies have been directed at assessing the in vitro antagonistic activity and in vivo efficacy of medicinal herbs and other plants against streptococcal agents. Most in vitro studies of plant extractives against S. iniae and S. agalactiae have found antibacterial activity, but essential oils, especially those containing eugenol, carvacrol or thymol, are more effective. Although essential oils have shown better anti-streptococcal activity in in vitro assays, in vivo bioassays require more attention. The extracts examined under in vivo conditions show moderate efficacy, increasing the survival rate of infected fish, probably through the enhancement of immunity before challenge bioassays. The available data, however, lack dosage optimization, toxicity and bioavailability assays of a specific plant or its bioactive compound in fish organs; hence, it is difficult to judge the validation of clinical efficacy for the prevention or treatment of fish streptococcosis. Despite the known bioactive compounds of many tested plants, few data are available on their mode of action towards streptococcal agents. This review addresses the efficacy of medicinal plants to fish streptococcosis and discusses the current gaps.
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21
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Pumchan A, Sae-Ueng U, Prasittichai C, Sirisuay S, Areechon N, Unajak S. A Novel Efficient Piscine Oral Nano-Vaccine Delivery System: Modified Halloysite Nanotubes (HNTs) Preventing Streptococcosis Disease in Tilapia ( Oreochromis sp.). Vaccines (Basel) 2022; 10:1180. [PMID: 35893829 PMCID: PMC9331641 DOI: 10.3390/vaccines10081180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 07/19/2022] [Accepted: 07/21/2022] [Indexed: 11/17/2022] Open
Abstract
Generally, the injection method is recommended as the best efficient method for vaccine applications in fish. However, labor-intensive and difficult injection for certain fish sizes is always considered as a limitation to aquatic animals. To demonstrate the effectiveness of a novel oral delivery system for the piscine vaccine with nano-delivery made from nano clay, halloysite nanotubes (HNTs) and their modified forms were loaded with killed vaccines, and we determined the ability of the system in releasing vaccines in a mimic digestive system. The efficaciousness of the oral piscine vaccine nano-delivery system was evaluated for its level of antibody production and for the level of disease prevention in tilapia. Herein, unmodified HNTs (H) and modified HNTs [HNT-Chitosan (HC), HNT-APTES (HA) and HNT-APTES-Chitosan (HAC)] successfully harbored streptococcal bivalent vaccine with inactivated S. agalactiae, designated as HF, HAF, HCF and HACF. The releasing of the loading antigens in the mimic digestive tract demonstrated a diverse pattern of protein releasing depending on the types of HNTs. Remarkably, HCF could properly release loading antigens with relevance to the increasing pH buffer. The oral vaccines revealed the greatest elevation of specific antibodies to S. agalactiae serotype Ia in HCF orally administered fish and to some extent in serotype III. The efficacy of streptococcal disease protection was determined by continually feeding with HF-, HAF-, HCF- and HACF-coated feed pellets for 7 days in the 1st and 3rd week. HCF showed significant RPS (75.00 ± 10.83%) among the other tested groups. Interestingly, the HCF-treated group exhibited noticeable efficacy similar to the bivalent-vaccine-injected group (RPS 81.25 ± 0.00%). This novel nano-delivery system for the fish vaccine was successfully developed and exhibited appropriated immune stimulation and promised disease prevention through oral administration. This delivery system can greatly support animals' immune stimulation, which conquers the limitation in vaccine applications in aquaculture systems. Moreover, this delivery system can be applied to carrying diverse types of biologics, including DNA, RNA and subunit protein vaccines.
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Affiliation(s)
- Ansaya Pumchan
- Department of Biochemistry, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, Bangkok 10900, Thailand;
- Kasetsart Vaccines and Bio-Product Innovation Centre, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, Bangkok 10900, Thailand
| | - Udom Sae-Ueng
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani 12120, Thailand;
| | - Chaiya Prasittichai
- Department of Chemistry, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, Bangkok 10900, Thailand;
| | - Soranuth Sirisuay
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, 50 Ngam Wong Wan Road, Chatuchak, Bangkok 10900, Thailand; (S.S.); (N.A.)
| | - Nontawith Areechon
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, 50 Ngam Wong Wan Road, Chatuchak, Bangkok 10900, Thailand; (S.S.); (N.A.)
| | - Sasimanas Unajak
- Department of Biochemistry, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, Bangkok 10900, Thailand;
- Kasetsart Vaccines and Bio-Product Innovation Centre, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, Bangkok 10900, Thailand
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22
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Hao J, Wang S, Wei Z, Zhang Q, Wu Z, Lin Y, Yang J, Zhang J, Zhang D, Li A. Construction of Streptococcus agalactiae sialic acid mutant and evaluation of its potential as a live attenuated vaccine in Nile tilapia (Oreochromis niloticus). J Appl Microbiol 2022; 133:2403-2416. [PMID: 35801502 DOI: 10.1111/jam.15706] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 06/07/2022] [Accepted: 07/04/2022] [Indexed: 11/28/2022]
Abstract
AIMS This study aimed to develop a live attenuated vaccine as an effective approach to prevent streptococcosis in tilapia (Oreochromis niloticus). METHODS AND RESULTS We eliminated the virulence factor, sialic acid (Sia) encoded by the neuA-D gene cluster from the Group B Streptococcus (Streptococcus agalactiae, GBS) strain WC1535, to construct Sia-deficient S. agalactiae (ΔSia) mutant by homologous recombination. Results showed that the ΔSia mutant had higher adherence to HEp-2 cells and lower resistance to RAW264.7 cell phagocytosis than the wild-type S. agalactiae. The virulence of the ΔSia mutant to tilapia dramatically decreased with no virulence recovery. The relative percent survivals (RPSs) were 50.00% and 54.50% at 30 days when challenged at the wild-type WC1535 doses of 1.0 × 107 and 5.0 × 107 CFU fish-1 , respectively, via intraperitoneal (IP) injection. The tilapia vaccinated via IP injection with the ΔSia mutant induced strong antibody agglutination titers. The expression of IL-1β, TNF-α, MHC-Iα, and MHC-IIβ could be enhanced in the intestine, spleen, and head kidney for tilapia administered with the ΔSia mutant. CONCLUSIONS GBS Sia plays a critical role in adherence to HEp-2 cells and resistance to the immune clearance of RAW264.7 cells. Moreover, the ΔSia mutant is a safe, stable, and immunogenic live attenuated vaccine candidate to protect tilapia against GBS infection. SIGNIFICANCE AND IMPACT OF STUDY The results offer more evidence of the importance of Sia in GBS and may be instructive in the control of tilapia streptococcosis.
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Affiliation(s)
- Jingwen Hao
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Shuyi Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | | | - Qianqian Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Zhenbing Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yaoyao Lin
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | | | - Jinyong Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Defeng Zhang
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - Aihua Li
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
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23
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Ramos-Espinoza FC, Cueva-Quiroz VA, Yunis-Aguinaga J, Alvarez-Rubio NC, de Mello NP, de Moraes JRE. Testing Novel Inactivation Methods and Adjuvants for Vaccines Against Streptococcus agalactiae in Nile Tilapia Oreochromis niloticus. METHODS IN MOLECULAR BIOLOGY (CLIFTON, N.J.) 2022; 2411:241-249. [PMID: 34816409 DOI: 10.1007/978-1-0716-1888-2_14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Inactivation by hydrogen peroxide and pH manipulation are two novel methods used recently in experimental vaccines against Streptococcus agalactiae in Nile tilapia. Here we describe in detail inactivation using novel methods as well as the classical method of inactivation. These vaccines showed similar moderate efficacy when compared to the conventional formaldehyde vaccine. In addition, we describe the inclusion of adjuvants in a hydrogen peroxide vaccine.
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Affiliation(s)
| | | | - Jefferson Yunis-Aguinaga
- Aquaculture Center of Unesp (Caunesp), São Paulo State University (Unesp), Jaboticabal, SP, Brazil
| | | | - Nicoli Paganoti de Mello
- Aquaculture Center of Unesp (Caunesp), São Paulo State University (Unesp), Jaboticabal, SP, Brazil
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24
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Unajak S, Pumchan A, Roytrakul S, Sawatdichaikul O, Areechon N. Novel Vaccine Development for Fish Culture Based on the Multiepitope Concept. METHODS IN MOLECULAR BIOLOGY (CLIFTON, N.J.) 2022; 2411:219-240. [PMID: 34816408 DOI: 10.1007/978-1-0716-1888-2_13] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
For the past several decades, aquaculture all around the world have been retarded by various disease outbreaks caused by many pathogens including parasites, bacteria, and viruses. Apart from being harmful to human health, the emerging diseases also dramatically affect the farm animals such as livestock and aquatic animals. To cope with this problem, one of the effective prophylactic measures is the application of vaccine. However, the traditional vaccines still have some limitations and several drawbacks; thus there is a need for the development of novel advanced vaccine such as chimeric multiepitope vaccine. Based on the current understanding of genomics and immunoproteomics together with the present bioinformatics tools, the researchers can identify the potential targeted epitopes being recognizable by the immune cells. Additionally, another critical point that should be considered for designing the chimeric multiepitope vaccine is the exposure of all those epitopes to the host organism. Thus, selecting an appropriate linker and joining each identified epitope in a suitable site can create the ideal protein structure protruding all the selected epitopes on its surface. Herein, our study would provide the fundamental platform to develop the multiepitope B-cell vaccine for the prevention and control of the aquatic animal disease starting with the epitope prediction until in vivo testing the multiepitope vaccine efficacy.
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Affiliation(s)
- Sasimanas Unajak
- Department of Biochemistry, Faculty of Science, Kasetsart University, Bangkok, Thailand.
| | - Ansaya Pumchan
- Department of Biochemistry, Faculty of Science, Kasetsart University, Bangkok, Thailand
| | - Sittiruk Roytrakul
- Functional Ingredients and Food Innovation Research Group, National Center for Genetic Engineering and Biotechnology, Pathumthani, Thailand
| | - Orathai Sawatdichaikul
- Institute of Food Research and Product Development, Kasetsart University, Bangkok, Thailand
| | - Nontawith Areechon
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Bangkok, Thailand
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Dietary Agaricus blazei Spent Substrate Improves Disease Resistance of Nile Tilapia (Oreochromis niloticus) against Streptococcus agalactiae In Vivo. JOURNAL OF MARINE SCIENCE AND ENGINEERING 2022. [DOI: 10.3390/jmse10010100] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
This study evaluated the effects of the feeding of spent mushroom substrate from Agaricus blazei on Nile tilapia (Oreochromis niloticus). The safety of 0–1000 μg/mL A. blazei spent substrate water extract (ABSSE) was demonstrated in the primary hepatic and splenic macrophages and the THK cell line (a cell line with characteristics of melanomacrophages) using a cytotoxicity assay. Here, 10 μg/mL of crude ABSSE promoted the phagocytic activity of macrophages and THK cells. Stimulating ABSSE-primed THK cells with lipopolysaccharides or peptidoglycan resulted in higher expression levels of four cytokine genes (e.g., interleukinz (IL)-1β, IL-12b, IL-8 and tumor necrosis factor α (TNFα)) and one cytokine gene (TNFα), respectively. An in vitro bacterial growth inhibition assay demonstrated that ABSSE could inhibit the growth of Streptococcus agalactiae. In the first feeding trial, Nile tilapia were fed with experimental feed containing 0, 1, or 5% of A. blazei spent substrate (ABSS) for seven and fourteen days followed by bacterial challenge assay. The best result was obtained when Nile tilapia were continuously fed for seven days on a diet containing 1% ABSS, with the survival rate being higher than in groups with 0% and 5% ABSS after challenge with S. agalactiae. In the second trial, fish were fed diets supplemented with 0% or 1% ABSS for seven days, and then all the groups were given the control feed for several days prior to bacterial challenge in order to investigate the duration of the protective effect provided by ABSS. The results showed that the protective effects were sustained at day 7 after the feed was switched. Overall, spent mushroom substrate from A. blazei is a cost-effective feed additive for Nile tilapia that protects fish from S. agalactiae infection.
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Tiruvayipati S, Tang WY, Barkham TMS, Chen SL. GBS-SBG - GBS Serotyping by Genome Sequencing. Microb Genom 2021; 7:000688. [PMID: 34895403 PMCID: PMC9842102 DOI: 10.1099/mgen.0.000688] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Group B Streptococcus (GBS; Streptococcus agalactiae) is the most common cause of neonatal meningitis and a rising cause of sepsis in adults. Recently, it has also been shown to cause foodborne disease. As with many other bacteria, the polysaccharide capsule of GBS is antigenic, enabling its use for strain serotyping. Recent advances in DNA sequencing have made sequence-based typing attractive (as has been implemented for several other bacteria, including Escherichia coli, Klebsiella pneumoniae species complex, Streptococcus pyogenes, and others). For GBS, existing WGS-based serotyping systems do not provide complete coverage of all known GBS serotypes (specifically including subtypes of serotype III), and none are simultaneously compatible with the two most common data types, raw short reads and assembled sequences. Here, we create a serotyping database (GBS-SBG, GBS Serotyping by Genome Sequencing), with associated scripts and running instructions, that can be used to call all currently described GBS serotypes, including subtypes of serotype III, using both direct short-read- and assembly-based typing. We achieved higher concordance using GBS-SBG on a previously reported data set of 790 strains. We further validated GBS-SBG on a new set of 572 strains, achieving 99.8% concordance with PCR-based molecular serotyping using either short-read- or assembly-based typing. The GBS-SBG package is publicly available and will hopefully accelerate and simplify serotyping by sequencing for GBS.
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Affiliation(s)
- Suma Tiruvayipati
- Infectious Diseases Translational Research Programme, Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Wen Ying Tang
- Department of Laboratory Medicine, Tan Tock Seng Hospital, Singapore
| | | | - Swaine L. Chen
- Infectious Diseases Translational Research Programme, Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore,Laboratory of Bacterial Genomics, Genome Institute of Singapore, 60 Biopolis Street, Genome #02-01, Singapore 138672,*Correspondence: Swaine L. Chen,
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27
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Trung NB, Nan FH, Lee MC, Loh JY, Gong HY, Lu MW, Hang HT, Lin YL, Lee PT. Fish-specific TLR18 in Nile tilapia (Oreochromis niloticus) recruits MyD88 and TRIF to induce expression of effectors in NF-κB and IFN pathways in melanomacrophages. FISH & SHELLFISH IMMUNOLOGY 2021; 119:587-601. [PMID: 34743023 DOI: 10.1016/j.fsi.2021.11.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 10/14/2021] [Accepted: 11/01/2021] [Indexed: 06/13/2023]
Abstract
Toll-like receptors (TLRs) are evolutionarily conserved proteins of pattern recognition receptors (PRRs) and play a crucial role in innate immune systems recognition of conserved pathogen-related molecular samples (PAMPs). We identified and characterized TLR18 from Nile tilapia (Oreochromis niloticus), OnTLR18, to elucidate its role in tissue expression patterns, modulation of gene expression after microbial challenge and TLR ligands, subcellular localization in fish and human cells, and the possible effectors TLR18 induces in a melanomacrophage-like cell line (tilapia head kidney (THK) cells). OnTLR18 expression was detected in all tissues examined, with the highest levels in the intestine and the lowest in the liver. OnTLR18 transcript was up-regulated in immune-related organs after bacterial and polyinosinic-polycytidylic acid (poly I:C) challenges and in the THK cells after lipopolysaccharide (LPS) stimulation. In transfected THK and human embryonic kidney (HEK) 293 cells, OnTLR18 localizes in the intracellular compartment. OnMyD88 and OnTRIF, but not OnTIRAP, were co-immunoprecipitated with OnTLR18, suggesting that the former two molecules are recruited by OnTLR18 as adaptors. The constitutively active form of OnTLR18 induced the production of pro-inflammatory cytokines, type I interferon (IFN), and antimicrobial peptides such as tumor necrosis factor α, interferon (IFN) d2.13, tilapia piscidin (TP)2, TP3, TP4, and hepcidin in THK cells. Our results suggest that OnTLR18 plays an important role in innate immunity through initiating nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) and IFN signaling pathways via OnMyD88 and OnTRIF and induces the production of various effectors in melanomacrophages.
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Affiliation(s)
- Nguyen Bao Trung
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, ROC; College of Aquaculture and Fisheries, Can Tho University, Viet Nam
| | - Fan-Hua Nan
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, ROC; Center of Excellence for Ocean Engineering, National Taiwan Ocean University, 11, Keelung City, 20224, Taiwan
| | - Meng-Chou Lee
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, ROC; Center of Excellence for Ocean Engineering, National Taiwan Ocean University, 11, Keelung City, 20224, Taiwan; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung City, 20224, Taiwan
| | - Jiun-Yan Loh
- Faculty of Applied Sciences, UCSI University, Cheras, Kuala Lumpur, Malaysia
| | - Hong-Yi Gong
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, ROC
| | - Ming-Wei Lu
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, ROC
| | - Ho Thi Hang
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, ROC
| | - Yu-Lin Lin
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, ROC
| | - Po-Tsang Lee
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, ROC.
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Xue T, Liu Y, Cao M, Li J, Tian M, Zhang L, Wang B, Liu X, Li C. Transcriptome analysis reveals deep insights into the early immune response of turbot (Scophthalmus maximus) induced by inactivated Aeromonas salmonicida vaccine. FISH & SHELLFISH IMMUNOLOGY 2021; 119:163-172. [PMID: 34562583 DOI: 10.1016/j.fsi.2021.09.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 08/15/2021] [Accepted: 09/21/2021] [Indexed: 06/13/2023]
Abstract
Non-coding RNAs are a class of RNAs, including circRNA and miRNA, that cannot be translated into proteins, but play an important role in the regulation of the expression of protein-coding genes. More and more evidences showed that circRNA can regulate the expression of miRNA target genes by adsorbing miRNA and form the circRNA-miRNA-mRNA regulatory network. The inactivated Aeromonas salmonicida vaccine is a commercial vaccine for many teleost. Understanding the role of circRNA and miRNA in the early stage of vaccine injection will provide a new insight for the study of the early immune response process in teleost. In this study, the expression profiles of circRNA, miRNA and mRNA were analyzed by high-throughput sequencing at 6 h, 12 h, 24 h and 96 h after injection of inactivated Aeromonas salmonicida vaccine and normal turbot spleen. Compared with the control group, 111, 141 and 453 differentially expressed circRNAs, miRNAs and mRNAs were identified in the four vaccination groups, respectively. The targeting relationships of differentially expressed miRNA to circRNA and mRNA were predicted by using miRanda software, and the results showed that a variety of differentially expressed immune-related genes were targeted. A total of 53 differentially expressed circRNA-miRNA-mRNA regulatory networks were constructed according to circRNA-miRNA pairs and miRNA-mRNA pairs. Among them, cell adhesion molecule 3 and immunoglobulin superfamily member 21 were regulated by the same miRNA (novel_880) and circRNA (novel_circ_0000311/novel_circ_0005326). These suggest that these circRNA-miRNA-mRNA regulatory networks may be a multi-molecule regulatory network, and its regulatory mechanism needs to be further studied.
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Affiliation(s)
- Ting Xue
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Yiping Liu
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Min Cao
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Jie Li
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266109, China
| | - Mengyu Tian
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Lu Zhang
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Beibei Wang
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Xiaoli Liu
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Chao Li
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China.
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29
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Beauruelle C, Treluyer L, Pastuszka A, Cochard T, Lier C, Mereghetti L, Glaser P, Poyart C, Lanotte P. CRISPR Typing Increases the Discriminatory Power of Streptococcus agalactiae Typing Methods. Front Microbiol 2021; 12:675597. [PMID: 34349737 PMCID: PMC8328194 DOI: 10.3389/fmicb.2021.675597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 06/15/2021] [Indexed: 11/25/2022] Open
Abstract
We explored the relevance of a Clustered regularly interspaced short palindromic repeats (CRISPR)-based genotyping tool for Streptococcus agalactiae typing and we compared this method to current molecular methods [multi locus sequence typing (MLST) and capsular typing]. To this effect, we developed two CRISPR marker schemes (using 94 or 25 markers, respectively). Among the 255 S. agalactiae isolates tested, 229 CRISPR profiles were obtained. The 94 and 25 markers made it possible to efficiently separate isolates with a high diversity index (0.9947 and 0.9267, respectively), highlighting a high discriminatory power, superior to that of both capsular typing and MLST (diversity index of 0.9017 for MLST). This method has the advantage of being correlated with MLST [through analysis of the terminal direct repeat (TDR) and ancestral spacers] and to possess a high discriminatory power (through analysis of the leader-end spacers recently acquired, which are the witnesses of genetic mobile elements encountered by the bacteria). Furthermore, this “one-shot” approach presents the benefit of much-reduced time and cost in comparison with MLST. On the basis of these data, we propose that this method could become a reference method for group B Streptococcus (GBS) typing.
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Affiliation(s)
- Clémence Beauruelle
- Département de Bactériologie-Virologie, Hygiène Hospitalière et Parasitologie-Mycologie, Centre Hospitalier Régional Universitaire (CHRU) de Brest, Brest, France.,Inserm, EFS, UMR 1078, GGB, Universitè de Bretagne Occidentale, Brest, France
| | - Ludovic Treluyer
- Institut Cochin, Team Bacteria and Perinatality, INSERM U1016, Paris, France
| | - Adeline Pastuszka
- INRAE, ISP, Université de Tours, Tours, France.,Service de Bactériologie-Virologie, CHRU de Tours, Tours, France
| | | | - Clément Lier
- INRAE, ISP, Université de Tours, Tours, France.,Service de Bactériologie-Virologie, CHRU de Tours, Tours, France
| | - Laurent Mereghetti
- INRAE, ISP, Université de Tours, Tours, France.,Service de Bactériologie-Virologie, CHRU de Tours, Tours, France
| | - Philippe Glaser
- Evolution and Ecology of Resistance to Antibiotics (EERA) Unit, Institut Pasteur, Paris, France.,UMR CNRS 3525, Paris, France
| | - Claire Poyart
- Institut Cochin, Team Bacteria and Perinatality, INSERM U1016, Paris, France.,CNRS UMR 8104, Paris Descartes University, Paris, France.,Department of Bacteriology, University Hospitals Paris Centre-Cochin, Assistance Publique-Hôpitaux de Paris, Paris, France
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Monir MS, Yusoff MSM, Zulperi ZM, Hassim HA, Zamri-Saad M, Amal MNA, Salleh A, Mohamad A, Yie LJ, Ina-Salwany MY. Immuno-protective efficiency of feed-based whole-cell inactivated bivalent vaccine against Streptococcus and Aeromonas infections in red hybrid tilapia (Oreochromis niloticus × Oreochromis mossambicus). FISH & SHELLFISH IMMUNOLOGY 2021; 113:162-175. [PMID: 33857622 DOI: 10.1016/j.fsi.2021.04.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 03/14/2021] [Accepted: 04/06/2021] [Indexed: 06/12/2023]
Abstract
Streptococcosis and motile aeromonad septicemia (MAS) are well-known diseases in tilapia culture, which cause mass mortality with significant economic losses. The development of feed-based bivalent vaccines in controlling these diseases has been initiated, however, the mechanisms of immunities and cross-protection in fish remain unclear. This study was conducted to assess the immuno-protective as well as the cross-protective efficacy of a newly developed feed-based bivalent vaccine against Streptococcus and Aeromonas infections in red hybrid tilapia. A total of five groups of fish were vaccinated orally through two different techniques; bivalent vaccine (inactivated Streptococcus iniae and Aeromonas hydrophila) sprayed on feed pellets (BS group); bivalent vaccine (inactivated S. iniae and A. hydrophila) incorporated in feed (BI group); monovalent inactivated S. iniae and A. hydrophila vaccine separately incorporated into feed as monovalent S. iniae (MS group) and monovalent A. hydrophila (MA group); and control group (without vaccine). The feed-based vaccine was delivered orally at 5% of body weight for five consecutive days. The booster doses were given in the same manner on weeks 2 and 6. Serum and skin mucus samples were collected to assess the IgM responses using indirect ELISA. The first administration of the feed-based vaccine stimulated the IgM levels that lasted until week 3, while the second booster ensured that the IgM levels remained high for a period of 16 weeks in the BI, MS and MA groups. The BI group developed a strong and significantly (P < 0.05) higher systemic and mucosal IgM responses against both S. iniae and A. hydrophila and also cross-protective antigen S. agalactiae and A. veronii compared to the BS and control groups. Quantitative real-time PCR results also showed that the relative expressions of IL-8, INF-γ and IgM in the BI immunized fish spleen, head kidney and hindgut exhibited various significant (P < 0.05) rising trends following both the vaccination and the challenge phase. On weeks 10, all fish were challenged through the intraperitoneal route, where relative percent survivals (RPS) of 82.22 ± 3.85% when challenged with S. iniae, 77.78 ± 3.85% when challenged with A. hydrophila and 77.78 ± 3.85% when co-challenged with both S. iniae and A. hydrophila were observed in the BI group, which were significantly higher (P < 0.05) compared to the other groups. The BI group also showed significantly (P < 0.05) higher partial cross-protections following challenges with S. agalactiae (RPS at 60.00 ± 6.67%) and A. veronii (RPS at 57.78 ± 7.70%). This study demonstrated that immunization with feed-based BI vaccine elicited immune responses that were capable of protecting red hybrid tilapia against streptococcosis and MAS.
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Affiliation(s)
- Md Shirajum Monir
- Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Md Sabri Mohd Yusoff
- Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Zarirah Mohamed Zulperi
- Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Hasliza Abu Hassim
- Department of Veterinary Preclinical Sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia; Laboratory of Sustainable Animal Production and Biodiversity, Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Mohd Zamri-Saad
- Aquatic Animal Health and Therapeutics Laboratory, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia; Department of Veterinary Laboratory Diagnosis, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Mohammad Noor Azmai Amal
- Aquatic Animal Health and Therapeutics Laboratory, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia; Department of Biology, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Annas Salleh
- Aquatic Animal Health and Therapeutics Laboratory, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia; Department of Veterinary Laboratory Diagnosis, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Aslah Mohamad
- Aquatic Animal Health and Therapeutics Laboratory, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Lee Jing Yie
- Aquatic Animal Health and Therapeutics Laboratory, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Md Yasin Ina-Salwany
- Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia; Aquatic Animal Health and Therapeutics Laboratory, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
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Trung NB, Nan FH, Wang IJ, Wu YC, Wen CM, Lee MC, Hang HT, Lee PT. Expression, signal transduction, and function analysis of TIRAP and TRIF in Nile tilapia (Oreochromis niloticus). DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2021; 117:103991. [PMID: 33387560 DOI: 10.1016/j.dci.2020.103991] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 12/26/2020] [Accepted: 12/26/2020] [Indexed: 06/12/2023]
Abstract
Toll/interleukin 1 receptor domain-containing adaptor protein (TIRAP) and toll/interleukin 1 receptor-domain-containing adapter-inducing interferon-β (TRIF) are crucial adaptors of signal transduction for the signaling pathways of toll-like receptors (TLRs). TIRAP and TRIF perform an essential function in an antimicrobial immune response; however, their function in Nile tilapia remains unknown. Herein, TIRAP and TRIF from Nile tilapia were identified and functionally characterized. Phylogenetic analysis showed that OnTIRAP and OnTRIF clustered with corresponding homologs from other fish species, with comparable gene structures to those of select vertebrate TIRAP and TRIF genes, respectively. The expression profiles of OnTIRAP and OnTRIF were broadly distributed in the ten tissues investigated, with high transcript levels noticed in immune organs. The transcription levels of OnTIRAP and OnTRIF were upregulated in response to bacterial and poly (I:C) challenges. GFP signals were only detected in the cytoplasmic region of fish cells transfected with OnTIRAP-GFP and OnTRIF-GFP expression plasmids. Moreover, overexpression of OnTIRAP and OnTRIF activated interferon-β (IFN-β) and activator protein 1 (AP1) reporters in HEK 293 cells. Activation of the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) reporter was only observed in OnTRIF-overexpressing HEK 293 cells. Furthermore, the results of the co-immunoprecipitation analysis showed that OnTRIF, but not OnTIRAP, was recruited as an adaptor protein by OnTLR25. This study provides the first evidence on the functions of OnTIRAP and OnTRIF in the immune system of Nile tilapia against pathogens and may serve as the basis for further investigations on TLR signaling in fish.
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Affiliation(s)
- Nguyen Bao Trung
- Department of Aquaculture, National Taiwan Ocean University, Keelung City, Taiwan, ROC; College of Aquaculture and Fisheries, Can Tho University, Can Tho, Viet Nam
| | - Fan-Hua Nan
- Department of Aquaculture, National Taiwan Ocean University, Keelung City, Taiwan, ROC
| | - I-Jong Wang
- Institute of Zoology, College of Life Science, National Taiwan University, Taipei City, Taiwan, ROC
| | - Yu-Ching Wu
- Institute of Zoology, College of Life Science, National Taiwan University, Taipei City, Taiwan, ROC
| | - Chiu-Ming Wen
- Department of Life Sciences, National University of Kaohsiung, Kaohsiung, Taiwan, ROC
| | - Meng-Chou Lee
- Department of Aquaculture, National Taiwan Ocean University, Keelung City, Taiwan, ROC; Center of Excellence for Ocean Engineering, National Taiwan Ocean University, Keelung City, Taiwan, ROC; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung City, Taiwan, ROC
| | - Ho Thi Hang
- Department of Aquaculture, National Taiwan Ocean University, Keelung City, Taiwan, ROC
| | - Po-Tsang Lee
- Department of Aquaculture, National Taiwan Ocean University, Keelung City, Taiwan, ROC.
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32
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Trung NB, Lee PT. Functional characterization of myeloid differentiation factor 88 in Nile tilapia (Oreochromis niloticus). Comp Biochem Physiol B Biochem Mol Biol 2020; 250:110485. [DOI: 10.1016/j.cbpb.2020.110485] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/16/2020] [Accepted: 08/02/2020] [Indexed: 12/23/2022]
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Legario FS, Choresca CH, Turnbull JF, Crumlish M. Isolation and molecular characterization of streptococcal species recovered from clinical infections in farmed Nile tilapia (Oreochromis niloticus) in the Philippines. JOURNAL OF FISH DISEASES 2020; 43:1431-1442. [PMID: 32929781 DOI: 10.1111/jfd.13247] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/25/2020] [Accepted: 07/27/2020] [Indexed: 06/11/2023]
Abstract
Streptococcosis cause severe losses for global tilapia farming, especially in developing countries. The aim of this study was to identify and characterize streptococci recovered from Nile tilapia farmed in the Philippines. Moribund and apparently healthy fish were sampled from grow-out cages, ponds and hatcheries. Clinical signs observed included exophthalmia, eye opacity, ascites, lethargy, erratic swimming and haemorrhages. Results showed that both Streptococcus iniae and Streptococcus agalactiae were associated with disease in these sites. Consistent with global reports, including those from South-East Asia, S. agalactiae was more widespread than S. iniae. Molecular serotyping of the S. agalactiae isolates identified the serotype Ia and serotype Ib. Histopathological findings were meningitis, meningoencephalitis and septicaemia. Identical virulence profiles were found for all strains of S. iniae, while S. agalactiae strains were separated into virulence profile I and profile II. All strains were susceptible to the tested antibiotics and resistant to oxolinic acid. Only S. agalactiae serotype Ib showed resistance to sulphamethoxazole-trimethoprim. This is the first study from the Philippines to characterize the streptococci involved in disease outbreaks in tilapia aquaculture. Outputs from this study will promote the development of efficacious disease control strategies in tilapia farming for the Philippines and South-East Asia.
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Affiliation(s)
- Francis S Legario
- Institute of Aquaculture, Faculty of Natural Sciences, University of Stirling, Stirling, UK
- Natural Sciences Department, Iloilo Science and Technology University, Iloilo City, Philippines
| | - Casiano H Choresca
- National Fisheries Research and Development Institute-Fisheries Biotechnology Centre, Science City of Munoz, Philippines
| | - Jimmy F Turnbull
- Institute of Aquaculture, Faculty of Natural Sciences, University of Stirling, Stirling, UK
| | - Margaret Crumlish
- Institute of Aquaculture, Faculty of Natural Sciences, University of Stirling, Stirling, UK
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Ramos-Espinoza FC, Cueva-Quiroz VA, Yunis-Aguinaga J, Alvarez-Rubio NC, Paganoti de Mello N, Engrácia de Moraes JR. Efficacy of two adjuvants administrated with a novel hydrogen peroxide-inactivated vaccine against Streptococcus agalactiae in Nile tilapia fingerlings. FISH & SHELLFISH IMMUNOLOGY 2020; 105:350-358. [PMID: 32717322 DOI: 10.1016/j.fsi.2020.07.051] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 07/08/2020] [Accepted: 07/22/2020] [Indexed: 05/26/2023]
Abstract
Streptococcus agalactiae is considered the main bacterial pathogen in cultured Nile tilapia. Formaldehyde-inactivated vaccines are the most accepted method for prevention and control of the disease. However, alternative inactivation methods for S. agalactiae vaccines have not been fully explored. Recently, we developed a hydrogen peroxide-inactivated vaccine against S. agalactiae with moderate efficacy, with the possibility to improve vaccine efficacy by adding adjuvants. The current study compared the efficacy of aluminum hydroxide and Freund's incomplete adjuvant (FIA) incorporated into a novel hydrogen peroxide-inactivated intraperitoneal vaccine against S. agalactiae for Nile tilapia fingerlings. The relative percentage survival (RPS) for aluminum hydroxide-adjuvanted vaccine (59.3%), and FIA-adjuvanted vaccine (77.8%) were higher than the vaccine without adjuvant (40.7%). In addition, fish immunized with aluminum hydroxide-adjuvanted vaccine had significantly higher levels of specific antibodies than control fish at 4 weeks post vaccination (wpv). Blood lymphocytes counts showed a decrease in vaccinated groups when compared to control fish, suggesting white cells migration to the tissues where antigen presentation is ongoing. Fish that received FIA-adjuvanted vaccine exhibited persistence of adjuvant deposits on intraperitoneal surfaces for at least 4 wpv that may be related to its superior performance compared to aluminum hydroxide adjuvanted vaccine, which did not evidence any type of deposit at any sampling times. The results observed in this study demonstrate that hydrogen peroxide-inactivated vaccine administered with either aluminum hydroxide or FIA induce optimal levels of protection, with a superior performance for FIA vaccine, which could be a good alternative to conventional formaldehyde-inactivated vaccines against S. agalactiae, due to its shorter manufacture time, and less toxicity.
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Affiliation(s)
- Fernando Carlos Ramos-Espinoza
- Aquaculture Center of Unesp (Caunesp), Sao Paulo State University (Unesp). Via Prof. Paulo Donato Castellane, km 05, 14884-900, Jaboticabal, SP, Brazil
| | - Victor Alexander Cueva-Quiroz
- Aquaculture Center of Unesp (Caunesp), Sao Paulo State University (Unesp). Via Prof. Paulo Donato Castellane, km 05, 14884-900, Jaboticabal, SP, Brazil
| | - Jefferson Yunis-Aguinaga
- Aquaculture Center of Unesp (Caunesp), Sao Paulo State University (Unesp). Via Prof. Paulo Donato Castellane, km 05, 14884-900, Jaboticabal, SP, Brazil; Aquatic Pathobiology Laboratory, Sea Institute of Peru (IMARPE), Esquina Gamarra y GeneralValle s/n, Chucuito, Callao, Peru
| | - Norquis Caled Alvarez-Rubio
- Aquaculture Center of Unesp (Caunesp), Sao Paulo State University (Unesp). Via Prof. Paulo Donato Castellane, km 05, 14884-900, Jaboticabal, SP, Brazil
| | - Nicoli Paganoti de Mello
- Aquaculture Center of Unesp (Caunesp), Sao Paulo State University (Unesp). Via Prof. Paulo Donato Castellane, km 05, 14884-900, Jaboticabal, SP, Brazil
| | - Julieta Rodini Engrácia de Moraes
- Aquaculture Center of Unesp (Caunesp), Sao Paulo State University (Unesp). Via Prof. Paulo Donato Castellane, km 05, 14884-900, Jaboticabal, SP, Brazil; Department of Veterinary Pathology, School of Agricultural and Veterinary Sciences (FCAV), Unesp, Via Prof. Paulo Donato Castellane, km 05, 14884-900, Jaboticabal, SP, Brazil.
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Ma Y, Hao L, Liang Z, Ma J, Ke H, Kang H, Yang H, Wu J, Feng G, Liu Z. Characterization of novel antigenic vaccine candidates for nile tilapia (Oreochromis niloticus) against Streptococcus agalactiae infection. FISH & SHELLFISH IMMUNOLOGY 2020; 105:405-414. [PMID: 32712231 DOI: 10.1016/j.fsi.2020.07.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 06/23/2020] [Accepted: 07/13/2020] [Indexed: 06/11/2023]
Abstract
Streptococcus agalactiae is one of the important pathogens responsible for high mortality and economic losses of the tilapia industry worldwide. Based on ten serovars of S. agalactiae infection, subunit vaccine with conserved antigens is promising strategy corresponding stimulated long-term immunity and provides protection for animals against different serotypes of S. agalactiae. In the present study, eight proteins (AP, AL, LivK, ESAT6, essA, essB, essC and esaA) were selected from the S. agalactiae serotype Ia genome as immunogenic antigens with bioinformation and immune experiment assays. These recombinant proteins were successfully obtained through expression in Escherichia coli and the immunogenicity was assessed in tilapia challenge model. The results showed that the recombinant proteins caused high-level-specific antibodies production and high lysozyme activities, suggesting that the recombinant proteins induced specific humoral immune response and innate immune response of tilapia. The signficant increase were observed in the cytokines levels of TNF-α, IL-1β, IFN-γ, cc1, cc2 and immune-related genes levels of CD8α and MHC factors in the spleen and head kidney tissues, suggesting that the recombinant proteins induced immune response of tilapia through cytokines signal pathway and activated high cytotoxic T-lymphocyte (CTL) activity of tilapia. Furthermore, vaccinated tilapia conferred high levels of protection against challenge with a lethal dose of highly virulent serovar Ⅰa (highest RPS was 91.60% in AL and essC protein groups). Our results indicated that the eight recombinant proteins induced high level of immune responses and offered protection against S. agalactiae infection, could be potential subunit vaccine candidates.
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Affiliation(s)
- Yanping Ma
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China
| | - Le Hao
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China
| | - Zhiling Liang
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China
| | - Jiangyao Ma
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China
| | - Hao Ke
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China
| | - Huahua Kang
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China; Zhaoqing Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Zhaoqing, China
| | - Hongwei Yang
- College of Animal Science and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Jing Wu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Guoqing Feng
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China
| | - Zhenxing Liu
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China.
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Lee PT, Ho TH, Nguyen BT, Lin YL, Chiu PY. Expression profile, subcellular localization and signaling pathway analysis of fish-specific TLR25 in Nile tilapia (Oreochromis niloticus). FISH & SHELLFISH IMMUNOLOGY 2020; 104:141-154. [PMID: 32502612 DOI: 10.1016/j.fsi.2020.05.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 05/08/2020] [Accepted: 05/11/2020] [Indexed: 06/11/2023]
Abstract
The Nile tilapia (Oreochromis niloticus) is one of the major food fish species produced in tropical and subtropical regions. However, this industry has been facing significant challenges from microbial infections. Understanding how hosts initiate immune responses against invading microbes is the first requirement for addressing disease outbreak prevention and disease resistance. Toll-like receptors (TLRs) are a family of evolutionarily conserved proteins that can recognize pathogen-associated molecular patterns (PAMPs). They thus play an essential role in innate immunity. TLR25 is a newly identified fish-specific member of the TLR1 subfamily. In this study, we investigate the molecular and functional characteristics of O. niloticus TLR25 (OnTLR25) via tissue expression patterns, gene expression modulation after challenge with bacteria and TLR ligands, subcellular localization in human and fish cells, and the signaling pathways TLR25 may induce. Transcriptional levels of OnTLR25 are high in immune-related organs such as the spleen and head kidney, and are increased following bacterial challenges. In addition, we show that OnTLR25 preferentially localizes to the intracellular compartment in transfected tilapia head kidney (THK) cell line. Furthermore, overexpression of the truncated form of OnTLR25 in THK cell line induced the expression of proinflammatory cytokines, such as tumor necrosis factor α, interleukin (IL)-1β, IL-8, IL-12a, and interferon-d2.13. Combined, our results suggest that TLR25 is likely to play an important role in the antimicrobial responses of the innate immune system of Nile tilapia.
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Affiliation(s)
- Po-Tsang Lee
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan.
| | - Thi Hang Ho
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan
| | - Bao Trung Nguyen
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan; College of Aquaculture and Fisheries, Can Tho University, Viet Nam
| | - Yu-Lin Lin
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan
| | - Po-Yu Chiu
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan
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Maekawa S, Wang YT, Yoshida T, Wang PC, Chen SC. Group C Streptococcus dysgalactiae infection in fish. JOURNAL OF FISH DISEASES 2020; 43:963-970. [PMID: 32662090 DOI: 10.1111/jfd.13211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 06/10/2020] [Accepted: 06/12/2020] [Indexed: 06/11/2023]
Abstract
Streptococcus dysgalactiae subsp. dysgalactiae (GCSD) is a Gram-positive, facultative anaerobic bacterium and mostly non-β-haemolytic with Lancefield group C antigen. GCSD infection has been identified in various vertebrates. From 2002 to the present, GCSD infection of fish has been reported to cause severe economic losses in aquaculture farms around the world. Moreover, GCSD isolates from teleosts have been identified in patients with ascending upper limb cellulitis. Therefore, the economic and clinical significance of GCSD has increased in aquaculture, livestock and human health. Many studies have been presented, from the first report of isolated GCSD in fish, to the pathogenesis, characterization, immune responses and vaccine development. In this review, we present the current knowledge of GCSD in teleosts.
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Affiliation(s)
- Shun Maekawa
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, International College, National Pingtung University of Science and Technology, Pingtung, Taiwan
- General Research Service Centre, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Yi-Ting Wang
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Terutoyo Yoshida
- Department of Marine Biology and Environmental Sciences, Faculty of Agriculture, Miyazaki University, Miyazaki, Japan
| | - Pei-Chi Wang
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, International College, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Shih-Chu Chen
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, International College, National Pingtung University of Science and Technology, Pingtung, Taiwan
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Lee PT, Wen CM, Nan FH, Yeh HY, Lee MC. Immunostimulatory effects of Sarcodia suiae water extracts on Nile tilapia Oreochromis niloticus and its resistance against Streptococcus agalactiae. FISH & SHELLFISH IMMUNOLOGY 2020; 103:159-168. [PMID: 32416250 DOI: 10.1016/j.fsi.2020.05.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 05/02/2020] [Accepted: 05/06/2020] [Indexed: 06/11/2023]
Abstract
In this study, water extracts of the red seaweed Sarcodia suiae were obtained using solid-liquid extraction (SLE) or pressurized liquid extraction (PLE) methods. The extracts were used to investigate immunostimulatory activity by measuring the phagocytic activity of Nile tilapia (Oreochromis niloticus) hepatic and splenic macrophages and the tilapia head kidney (THK) cell line, and modulation of immune-related genes in primary head kidney (HK) cells and THK cells. At 10 μg/ml, both extracts promoted the proliferation of hepatic and splenic macrophages. Expression levels of proinflammatory cytokines (IL-1β and IL-8), antimicrobial peptides (TP2 and TP4), and pattern recognition receptors (TLR5) were elevated in SLE extracts-treated primary HK leukocytes. Similarly, IL-1β, IL-8, and TNFα expression was also induced by SLE extract in THK cells. Phagocytic activity in primary HK cells and THK cells was induced by SLE extract 12 h and 24 h post-stimulation, while PLE extract only induced phagocytic activity in THK cells at early time points. SLE extract (100 μg/g body weight) increased the expression of IL-1β, IL-8, TNFα, TP2, TP4, TLR2 and TLR5 in the spleen and immunoprotective efficiency against Streptococcus agalactiae infection. Taken together, these results show that S. suiae can differentially stimulate the immune response of tilapia in vitro and in vivo and could potentially be used as an immunomodulator in tilapia culture.
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Affiliation(s)
- Po-Tsang Lee
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, ROC
| | - Chiu-Ming Wen
- Department of Life Sciences, National University of Kaohsiung, Kaohsiung City, 81148, Taiwan, ROC
| | - Fan-Hua Nan
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, ROC
| | - Han-Yang Yeh
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, ROC
| | - Meng-Chou Lee
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, ROC; Center of Excellence for Ocean Engineering, National Taiwan Ocean University Keelung City, Taiwan, ROC; Center of Excellence for the Oceans, National Taiwan Ocean University Keelung City, Taiwan, ROC.
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Shirajum Monir M, Yusoff SM, Mohamad A, Ina-Salwany MY. Vaccination of Tilapia against Motile Aeromonas Septicemia: A Review. JOURNAL OF AQUATIC ANIMAL HEALTH 2020; 32:65-76. [PMID: 32331001 DOI: 10.1002/aah.10099] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 01/07/2020] [Indexed: 05/27/2023]
Abstract
The production of tilapia Oreochromis spp. is rapidly growing throughout the world, but atypical motile aeromonad septicemia (MAS) is a current threat to the tilapia farming industry. The etiological agent of this disease is usually Aeromonas hydrophila. Mortality rates due to MAS are frequently high, resulting in a devastating negative impact on this industry worldwide; therefore, proper control measures regarding both prevention and treatment are necessary. Although vaccines against MAS for tilapia are available, their effectiveness is entirely dependent on the specific strain of problematic bacteria. Until now, whole-cell inactivated A. hydrophila vaccines for tilapia have exhibited the highest level of protection over live attenuated and recombinant vaccines. Among the various vaccine administration systems, only intraperitoneal (i.p.) injections of the A. hydrophila vaccine into tilapia were found to provide prominent immune protection. Vaccine efficacy was primarily measured by using the i.p. injection challenge model and estimating the relative percent survival of the immunized tilapia. Freund's incomplete adjuvant showed to be the most effective for tilapia MAS vaccines. In this review, multiple factors that directly or indirectly influence the efficacy of MAS vaccines for tilapia (adjuvants, challenge models, immunization doses and duration, and size of vaccinated fish) are discussed.
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Affiliation(s)
- Md Shirajum Monir
- Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Sabri Mohd Yusoff
- Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Aslah Mohamad
- Laboratory of Marine Biotechnology, Institute of Bioscience, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - M Y Ina-Salwany
- Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
- Laboratory of Marine Biotechnology, Institute of Bioscience, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
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Pulpipat T, Maekawa S, Wang PC, Chen SC. Immune Responses and Protective Efficacy of a Formalin-Killed Francisella Noatunensis Subsp. Orientalis Vaccine Evaluated through Intraperitoneal and Immersion Challenge Methods in Oreochromis Niloticus. Vaccines (Basel) 2020; 8:vaccines8020163. [PMID: 32260212 PMCID: PMC7348880 DOI: 10.3390/vaccines8020163] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 04/01/2020] [Accepted: 04/02/2020] [Indexed: 12/25/2022] Open
Abstract
Francisella noatunensis subsp. orientalis (Fno), an intracellular bacterium, causes systemic granulomatous diseases, resulting in high mortality and huge economic losses in Taiwanese tilapia farming. In this study, we tested the efficacy of a formalin-killed Fno vaccine in cultured tilapia. Fno was isolated from diseased tilapia, inactivated with formalin, and mixed with the mineral oil base adjuvant (MontanideTM ISA 763 AVG). A total of 300 tilapia were divided into two groups. The experimental group was intraperitoneally injected with 0.1 mL of vaccine, which was substituted with phosphate-buffered saline (PBS) in the control group. A booster was administered at 2 weeks post-immunization. Tilapia were challenged at 6 weeks post primary immunization by intraperitoneal (IP) injection and immersion methods. Mortality was recorded at 21 and 60 days. The results revealed that the vaccine induced a greater antibody titer and led to 71% and 76% of relative percent survival (RPS) after the IP and immersion challenge. The transcripts of proinflammatory cytokines and immune-related genes, including interleukin-1β (IL-1β), tumor necrosis factor alpha (TNFα), C-X-C motif chemokine ligand 8 (CXCL8), and interleukin-17C (IL-17C), were significantly upregulated after vaccination. Additionally, vaccinated fish had lower bacterial loads in the blood and lower granuloma intensities in the kidney, spleen, liver, and gill than control fish. The results in this study demonstrate that the inactivated Fno vaccine could be an essential resource in Taiwanese tilapia farming.
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Affiliation(s)
- Theeraporn Pulpipat
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan; (T.P.); (S.M.); (P.-C.W.)
| | - Shun Maekawa
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan; (T.P.); (S.M.); (P.-C.W.)
- International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, International College, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
- Research Center for Fish Vaccine and Diseases, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
| | - Pei-Chi Wang
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan; (T.P.); (S.M.); (P.-C.W.)
- International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, International College, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
- Research Center for Fish Vaccine and Diseases, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
- Southern Taiwan Fish Diseases Research Center, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
| | - Shih-Chu Chen
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan; (T.P.); (S.M.); (P.-C.W.)
- International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, International College, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
- Research Center for Fish Vaccine and Diseases, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
- Southern Taiwan Fish Diseases Research Center, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
- Research Center for Animal Biologics, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
- Correspondence: ; Tel.: +886-8-770-3202 (ext. 5076 or 5095)
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Diaz-Dinamarca DA, Hernandez C, Escobar DF, Soto DA, Muñoz GA, Badilla JF, Manzo RA, Carrión F, Kalergis AM, Vasquez AE. Mucosal Vaccination with Lactococcus lactis-Secreting Surface Immunological Protein Induces Humoral and Cellular Immune Protection against Group B Streptococcus in a Murine Model. Vaccines (Basel) 2020; 8:vaccines8020146. [PMID: 32224855 PMCID: PMC7349291 DOI: 10.3390/vaccines8020146] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/19/2020] [Accepted: 03/20/2020] [Indexed: 12/22/2022] Open
Abstract
Group B Streptococcus (GBS) is the primary etiological agent of sepsis and meningitis in newborns and is associated with premature birth and stillbirth. The development of a licensed vaccine is one of the pending challenges for the World Health Organization. Previously, we showed that oral immunization with surface immune protein (SIP) decreases vaginal colonization of GBS and generates functional opsonizing antibodies, which was determined by opsonophagocytic assays (OPA) in vitro. We also showed that the protein has an adjuvant vaccine profile. Therefore, an oral vaccine based on SIP may be an attractive alternative to employ in the development of new vaccines against GBS. Lactococcus lactis is a highlighted oral vaccine probiotic inducer of the mucosal immune response. This bacterium could serve as an antigen-delivering vehicle for the development of an edible vaccine and has been used in clinical trials. In this study, we showed that an oral vaccine with a recombinant L. lactis strain secreting SIP from GBS (rL. lactis-SIP) can induce protective humoral and cellular immunity in an experimental model of GBS vaginal colonization in C57BL/6 mice. Mice immunized with rL. lactis-SIP were protected against clinical symptoms and bacterial colonization after GBS vaginal colonization. Our rL. lactis-SIP vaccine also induces an increase of immunoglobulin G (IgG) and immunoglobulin A (IgA) specifically against SIP. The adoptive transfer of serum from vaccinated mice to naïve mice generated protection against GBS vaginal colonization. Moreover, the rL.lactis-SIP strain induces the activation of SIP-specific T cells, which could decrease GBS vaginal colonization and generate protective antibodies when transferred to other mice. Our experimental observations strongly support the notion that rL. lactis-SIP induces protective humoral and cellular immunity and could be considered as a novel alternative in the development of vaccines for GBS.
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Affiliation(s)
- Diego A. Diaz-Dinamarca
- Sección de Biotecnología, Instituto de Salud Pública de Chile, Santiago 780050, Chile; (D.A.D.-D.); (C.H.); (D.F.E.); (D.A.S.); (G.A.M.); (J.F.B.); (R.A.M.)
| | - Carlos Hernandez
- Sección de Biotecnología, Instituto de Salud Pública de Chile, Santiago 780050, Chile; (D.A.D.-D.); (C.H.); (D.F.E.); (D.A.S.); (G.A.M.); (J.F.B.); (R.A.M.)
- Millennium Institute of Immunology and Immunotherapy, Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago 8380453, Chile;
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas y Farmaceuticas, Universidad de Chile, Independencia, Santiago 8380492, Chile
| | - Daniel F. Escobar
- Sección de Biotecnología, Instituto de Salud Pública de Chile, Santiago 780050, Chile; (D.A.D.-D.); (C.H.); (D.F.E.); (D.A.S.); (G.A.M.); (J.F.B.); (R.A.M.)
| | - Daniel A. Soto
- Sección de Biotecnología, Instituto de Salud Pública de Chile, Santiago 780050, Chile; (D.A.D.-D.); (C.H.); (D.F.E.); (D.A.S.); (G.A.M.); (J.F.B.); (R.A.M.)
| | - Guillermo A. Muñoz
- Sección de Biotecnología, Instituto de Salud Pública de Chile, Santiago 780050, Chile; (D.A.D.-D.); (C.H.); (D.F.E.); (D.A.S.); (G.A.M.); (J.F.B.); (R.A.M.)
- Millennium Institute of Immunology and Immunotherapy, Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago 8380453, Chile;
| | - Jesús F. Badilla
- Sección de Biotecnología, Instituto de Salud Pública de Chile, Santiago 780050, Chile; (D.A.D.-D.); (C.H.); (D.F.E.); (D.A.S.); (G.A.M.); (J.F.B.); (R.A.M.)
- Millennium Institute of Immunology and Immunotherapy, Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago 8380453, Chile;
- Escuela de Biotecnología, Facultad de Ciencias, Universidad Santo Tomas, Santiago 8320000, Chile
| | - Ricardo A. Manzo
- Sección de Biotecnología, Instituto de Salud Pública de Chile, Santiago 780050, Chile; (D.A.D.-D.); (C.H.); (D.F.E.); (D.A.S.); (G.A.M.); (J.F.B.); (R.A.M.)
| | - Flavio Carrión
- Programa de Inmunología Traslacional, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago 7610315, Chile;
| | - Alexis M. Kalergis
- Millennium Institute of Immunology and Immunotherapy, Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago 8380453, Chile;
- Departamento de Endocrinología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago 8330077, Chile
| | - Abel E. Vasquez
- Sección de Biotecnología, Instituto de Salud Pública de Chile, Santiago 780050, Chile; (D.A.D.-D.); (C.H.); (D.F.E.); (D.A.S.); (G.A.M.); (J.F.B.); (R.A.M.)
- Escuela de Biotecnología, Facultad de Ciencias, Universidad Santo Tomas, Santiago 8320000, Chile
- Facultad de Medicina y Ciencia, Universidad San Sebastián, Providencia, Santiago 8320000, Chile
- Correspondence: ; Tel.: +562-2575-5513
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Six A, Krajangwong S, Crumlish M, Zadoks RN, Walker D. Galleria mellonella as an infection model for the multi-host pathogen Streptococcus agalactiae reflects hypervirulence of strains associated with human invasive disease. Virulence 2020; 10:600-609. [PMID: 31230520 PMCID: PMC6592362 DOI: 10.1080/21505594.2019.1631660] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Streptococcus agalactiae, or group B Streptococcus (GBS), infects diverse hosts including humans and economically important species such as cattle and fishes. In the context of human health, GBS is a major cause of neonatal infections and an emerging cause of invasive disease in adults and of foodborne disease in Southeast Asia. Here we show that GBS is able to establish a systemic infection in Galleria mellonella larvae that is associated with extensive bacterial replication and dose-dependent larval survival. This infection model is suitable for use with GBS isolates from both homeothermic and poikilothermic hosts. Hypervirulent sequence types (ST) associated with invasive human disease in neonates (ST17) or adults (ST283) show increased virulence in this model, indicating it may be useful in studying GBS virulence determinants, albeit with limitations for some host-specific virulence factors. In addition, we demonstrate that larval survival can be afforded by antibiotic treatment and so the model may also be useful in the development of novel anti-GBS strategies. The use of G. mellonella in GBS research has the potential to provide a low-cost infection model that could reduce the number of vertebrates used in the study of GBS infection.
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Affiliation(s)
- Anne Six
- a Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences , University of Glasgow , Glasgow , UK
| | - Sakranmanee Krajangwong
- a Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences , University of Glasgow , Glasgow , UK
| | | | - Ruth N Zadoks
- c Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences , University of Glasgow , Glasgow , UK
| | - Daniel Walker
- a Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences , University of Glasgow , Glasgow , UK
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Zhang D, Gao Y, Li Q, Ke X, Liu Z, Lu M, Shi C. An effective live attenuated vaccine against Streptococcus agalactiae infection in farmed Nile tilapia (Oreochromis niloticus). FISH & SHELLFISH IMMUNOLOGY 2020; 98:853-859. [PMID: 31751658 DOI: 10.1016/j.fsi.2019.11.044] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 10/19/2019] [Accepted: 11/18/2019] [Indexed: 06/10/2023]
Abstract
Streptococcus agalactiae is an important pathogen associated with various aquatic animals, especially tilapia. Streptococcosis has greatly limited the healthy development of tilapia aquaculture in recent times. The development of novel effective vaccines is important for the prevention and control of streptococcosis in fish. We previously constructed a non-encapsulated S. agalactiae strain △cps by the in-frame deletion method. Here, we evaluated whether this mutant △cps is safe for tilapia and suitable for protection against streptococcosis. We observed that the △cps strain was non-pathogenic to tilapia, and there was no reversion of virulence when it was passaged in tilapia. Moreover, the △cps strain survived for at least 11 d in the main immune organs of tilapia. The tilapia vaccinated via intraperitoneal (IP) injection with △cps strain induced a high antibody titer, and the IgM antibody levels were significantly higher in the vaccinated group than in the control group. The vaccination protected tilapia against the S. agalactiae challenge with a relative percent survival of 90.47%. In addition, tilapia immunized with the △cps strain showed significantly higher expression level of IFN-γ, IL-1β, MyD88, IgM, and MHC-Iα in the head kidney than those in the control during the entire observation period. The expression of MHC-IIβ was inhibited during 1-7 d of immunization. These results revealed that the △cps strain is able to induce humoral and cell-mediated immune response in tilapia. Therefore, the strain △cps has a broad application prospect as a target for attenuation in vaccine development.
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Affiliation(s)
- Defeng Zhang
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China; Key Laboratory of Aquatic Animal Immune Technology, Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Yanxia Gao
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China; Key Laboratory of Aquatic Animal Immune Technology, Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Qingyong Li
- Fisheries Research and Extension Center of Huizhou, Huizhou, 516002, China
| | - Xiaoli Ke
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China; Key Laboratory of Aquatic Animal Immune Technology, Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Zhigang Liu
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China; Key Laboratory of Aquatic Animal Immune Technology, Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Maixin Lu
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China; Key Laboratory of Aquatic Animal Immune Technology, Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China.
| | - Cunbin Shi
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China; Key Laboratory of Aquatic Animal Immune Technology, Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
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Wang Q, Fu T, Li X, Luo Q, Huang J, Sun Y, Wang X. Cross-immunity in Nile tilapia vaccinated with Streptococcus agalactiae and Streptococcus iniae vaccines. FISH & SHELLFISH IMMUNOLOGY 2020; 97:382-389. [PMID: 31841691 DOI: 10.1016/j.fsi.2019.12.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 12/01/2019] [Accepted: 12/09/2019] [Indexed: 06/10/2023]
Abstract
Streptococcus agalactiae and Streptococcus iniae are major bacterial pathogens of tilapia that can cause high mortality concomitant with large economic losses to aquaculture. Although development of vaccines using formalin-killed bacteria to control these diseases has been attempted, the mechanism of immunity against streptococcal infections and the cross-protective ability of these two bacteria remains unclear. To explore the immunological role of these vaccines, we compared the immune responses of tilapia after immunization with both vaccines and compared the relative percent survival (RPS) and cross-immunization protection of tilapia after separate infection with S. agalactiae and S. iniae. All results revealed that vaccinated fish had significantly higher (P < 0.05) levels of specific antibodies than control fish 14 days post secondary vaccination (PSV) and 7 days post challenge. In vaccinated fish, the mRNA expression of interleukin-8 (IL-8), interleukin-12 (IL-12), caspase-3 (C-3), tumour necrosis factor (TNF), and interferon (IFN) was significantly up regulated (P < 0.05) in the head kidney after immunized; similar results were found for IL-8, TNF and IFN in the posterior kidney, meanwhile the expression levels of C-3 and IFN were significantly increased (P < 0.05) in the spleen of vaccinated fish. Additionally, the levels of acid phosphatase (ACP), alkaline phosphatase (AKP), superoxide dismutase (SOD), and lysozyme (LZM) in vaccinated fish were improved at different degree when compared to the control fish. These results showed that vaccination with formalin-killed cells (FKCs) of either S. agalactiae or S. iniae conferred protection against infection by the corresponding pathogen in Nile tilapia, resulting in RPS values of 92.3% and 91.7%, respectively. Furthermore, cross-protection was observed, as the S. agalactiae FKC vaccine protected fish from S. iniae infection, and vice versa. These results suggested that the S. agalactiae and S. iniae FKC vaccines can induce immune responses and generate excellent protective effects in Nile tilapia.
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Affiliation(s)
- Qishuo Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China; Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, PR China
| | - Tianzeng Fu
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 272000, PR China
| | - Xincang Li
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai, 200090, PR China
| | - Qian Luo
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China
| | - Jinjing Huang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China
| | - Yongcan Sun
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China
| | - Xuepeng Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 272000, PR China.
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Pumchan A, Krobthong S, Roytrakul S, Sawatdichaikul O, Kondo H, Hirono I, Areechon N, Unajak S. Novel Chimeric Multiepitope Vaccine for Streptococcosis Disease in Nile Tilapia (Oreochromis niloticus Linn.). Sci Rep 2020; 10:603. [PMID: 31953479 PMCID: PMC6969146 DOI: 10.1038/s41598-019-57283-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 12/18/2019] [Indexed: 12/21/2022] Open
Abstract
Streptococcus agalactiae is a causative agent of streptococcosis disease in various fish species, including Nile tilapia (Oreochromis niloticus Linn.). Vaccination is an effective disease prevention and control method, but limitations remain for protecting against catastrophic mortality of fish infected with different strains of streptococci. Immunoproteomics analysis of S. agalactiae was used to identify antigenic proteins and construct a chimeric multiepitope vaccine. Epitopes from five antigenic proteins were shuffled in five helices of a flavodoxin backbone, and in silico analysis predicted a suitable RNA and protein structure for protein expression. 45F2 and 42E2 were identified as the best candidates for a chimeric multiepitope vaccine. Recombinant plasmids were constructed to produce a recombinant protein vaccine and DNA vaccine system. Overexpressed proteins were determined to be 30 kDa and 25 kDa in the E. coli and TK1 systems, respectively. The efficacy of the chimeric multiepitope construct as a recombinant protein vaccine and DNA vaccine was evaluated in Nile tilapia, followed by S. agalactiae challenge at 1 × 107 CFU/mL. Relative percentage survival (RPS) and cumulative mortality were recorded at approximately 57-76% and 17-30%, respectively. These chimeric multiepitope vaccines should be applied in streptococcosis disease control and developed into a multivalent vaccine to control multiple diseases.
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Affiliation(s)
- Ansaya Pumchan
- Department of Biochemistry, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, Bangkok, 10900, Thailand
| | - Sucheewin Krobthong
- Proteomics Laboratory, Genome Institutes, National Center for Genetic Engineering and Biotechnology, Pathumthani, 12120, Thailand
| | - Sittiruk Roytrakul
- Proteomics Laboratory, Genome Institutes, National Center for Genetic Engineering and Biotechnology, Pathumthani, 12120, Thailand
| | - Orathai Sawatdichaikul
- Department of Nutrition and Health, Institute of Food Research and Product Development, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, Bangkok, 10900, Thailand
| | - Hidehiro Kondo
- Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-KU, Tokyo, 108-8477, Japan
| | - Ikuo Hirono
- Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-KU, Tokyo, 108-8477, Japan
| | - Nontawith Areechon
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, 50 Ngam Wong Wan Road, Chatuchak, Bangkok, 10900, Thailand
| | - Sasimanas Unajak
- Department of Biochemistry, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, Bangkok, 10900, Thailand.
- Omics Center for Agriculture, Bioresources, Food and Health, Kasetsart University (OmiKU), Kasetsart University, 50 Ngam Wong Wan Road, Chatuchak, Bangkok, 10900, Thailand.
- Center for Advanced Studies for Agriculture and Food, KU Institute for Advanced Studies, Kasetsart University, (CASAF, NRU-KU, Thailand), Bangkok, 10900, Thailand.
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Wu XM, Cao L, Hu YW, Chang MX. Transcriptomic characterization of adult zebrafish infected with Streptococcus agalactiae. FISH & SHELLFISH IMMUNOLOGY 2019; 94:355-372. [PMID: 31533079 DOI: 10.1016/j.fsi.2019.09.040] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 09/12/2019] [Accepted: 09/15/2019] [Indexed: 06/10/2023]
Abstract
Streptococcus agalactiae is a major aquaculture pathogen infecting various saltwater and freshwater fish. To better understand the mechanism of the immune responses to S. agalactiae in wildtype zebrafish, the transcriptomic profiles of two organs containing mucosal-associated lymphoid tissues from S. agalactiae-infected and non-infected groups were obtained using RNA-seq techniques. In the intestines, 6735 and 12908 differently expressed genes (DEGs) were identified at 24 hpi and 48 hpi, respectively. Among 66 and 116 significantly enriched pathways, 15 and 21 pathways were involved in immune system or signal transduction at 24 hpi and 48 hpi, respectively. A number of genes involved in Toll-like receptor signaling pathway, RIG-I-like receptor signaling pathway, NOD-like receptor signaling pathway, T cell receptor signaling pathway, B cell receptor signaling pathway, Antigen processing and presentation, NF-kappa B signaling pathway and PI3K-Akt signaling pathway were significantly downregulated. In the skins, 3113 and 4467 DEGs were identified at 24 hpi and 48 hpi, respectively. Among 24 and 56 significantly enriched pathways, 4 and 13 pathways were involved in immune system or signal transduction at 24 hpi and 48 hpi, respectively. More immune-related signaling pathways including Leukocyte transendothelial migration, Cytokine-cytokine receptor interaction, PI3K-Akt signaling pathway, IL-17 signaling pathway, MAPK signaling pathway, TNF signaling pathway, Complement and coagulation cascades, Hematopoietic cell lineage and Jak-STAT signaling pathway were differently enriched for upregulated DEGs at 48 hpi, which were completely different from that in the intestines. Furthmore, comparative transcriptome analysis revealed that the downregulated 1618 genes and upregulated 1622 genes existed both at 24 hpi and 48 hpi for the intestine samples. In the skins, the downregulated 672 genes and upregulated 428 genes existed both at 24 hpi and 48 hpi. Three pathways related to immune processes were significantly enriched for downregulated DEGs both in the intestines and skins collected at 24 hpi and 48 hpi, which included Antigen processing and presentation, Intestinal immune network for IgA production and Hematopoietic cell lineage. Interaction network analysis of DEGs identified the main DEGs in the sub-network of complement and coagulation cascades both in the intestines and skins. Twenty of DEGs involved in complement and coagulation cascades were further validated by Real-time quantitative PCR. Altogether, the results obtained in this study will provide insight into the immune response of zebrafish against S. agalactiae XQ-1 infection in fatal conditions, and reveal the discrepant expression pattern of complement and coagulation cascades in the intestines and skins.
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Affiliation(s)
- Xiao Man Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, China; University of Chinese Academy of Sciences, Beijing, China
| | - Lu Cao
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, China; University of Chinese Academy of Sciences, Beijing, China
| | - Yi Wei Hu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, China; University of Chinese Academy of Sciences, Beijing, China
| | - Ming Xian Chang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, China; Key Laboratory of Aquaculture Disease Control, Ministry of Agriculture, Wuhan, Hubei Province, China; The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China.
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Van Doan H, Hoseinifar SH, Sringarm K, Jaturasitha S, Yuangsoi B, Dawood MAO, Esteban MÁ, Ringø E, Faggio C. Effects of Assam tea extract on growth, skin mucus, serum immunity and disease resistance of Nile tilapia (Oreochromis niloticus) against Streptococcus agalactiae. FISH & SHELLFISH IMMUNOLOGY 2019; 93:428-435. [PMID: 31362090 DOI: 10.1016/j.fsi.2019.07.077] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 07/22/2019] [Accepted: 07/26/2019] [Indexed: 06/10/2023]
Abstract
The present study aimed to assess the possible effects of Assam tea (Camellia sinensis) extract (ATE) on growth performances, immune responses, and disease resistance of Nile tilapia, Oreochromis niloticus against Streptococcus agalactiae. Five levels of ATE were supplemented into the based diet at 0, 1, 2, 4, and 8 g kg-1 feed of Nile tilapia fingerlings (10.9 ± 0.04 g initial weight) in triplicate. After four and eight weeks of feeding, fish were sampled to determine the effects of the tea supplements upon their growth performance, as well as serum and mucosal immune responses. A disease challenge using S. agalactiae was conducted at the end of the feeding trial. Fish fed ATE revealed significantly improved serum lysozyme, peroxidase, alternative complement (ACH50), phagocytosis, and respiratory burst activities compared to the basal control fed fish (P < 0.05). The mucus lysozyme and peroxidase activities were ameliorated through ATE supplementation in the tilapia diets. Supplementation of ATE significantly (P < 0.05) enhanced final body weight, weight gain, and specific growth rate; while a decreased feed conversion ratio was revealed at 2 g kg-1 inclusion level, after four and eight weeks. Challenge test showed that the relative percent survival (RSP) of fish in each treatment was 33.33%, 60.00%, 83.33%, 76.68%, and 66.68% in groups fed 0, 1, 2, 4, and 8 g kg-1, respectively. In summary, diets supplemented with ATE especially at 2 g kg-1 increased the humoral and mucosal immunity, enhanced growth performance, and offered higher resistance against S. agalactiae infection in Nile tilapia.
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Affiliation(s)
- Hien Van Doan
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand; Science and Technology Research Institute, Chiang Mai University, 239 Huay Keaw Rd., Suthep, Muang, Chiang Mai, 50200, Thailand
| | - Seyed Hossein Hoseinifar
- Department of Fisheries, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
| | - Korawan Sringarm
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Sanchai Jaturasitha
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand; Science and Technology Research Institute, Chiang Mai University, 239 Huay Keaw Rd., Suthep, Muang, Chiang Mai, 50200, Thailand
| | - Bundit Yuangsoi
- Department of Fisheries, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Mahmoud A O Dawood
- Department of Animal Production, Faculty of Agriculture, Kafrelsheikh University, 33516, Kafrelsheikh, Egypt.
| | - Maria Ángeles Esteban
- Fish Innate Immune System Group, Department of Cell Biology & Histology, Faculty of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Spain
| | - Einar Ringø
- Norwegian College of Fishery Science, Faculty of Bioscience, Fisheries and Economics, UiT The Arctic University of Norway, Tromsø, Norway
| | - Caterina Faggio
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina Viale Ferdinando Stagno D'Alcontres, 31 98166, S. Agata, Messina, Italy
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Laith AA, Abdullah MA, Nurhafizah WWI, Hussein HA, Aya J, Effendy AWM, Najiah M. Efficacy of live attenuated vaccine derived from the Streptococcus agalactiae on the immune responses of Oreochromis niloticus. FISH & SHELLFISH IMMUNOLOGY 2019; 90:235-243. [PMID: 31009810 DOI: 10.1016/j.fsi.2019.04.052] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 03/30/2019] [Accepted: 04/18/2019] [Indexed: 06/09/2023]
Abstract
Streptococcus agalactiae species have been recognized as the main pathogen causing high mortality in fish leading to significant worldwide economical losses to the aquaculture industries. Vaccine development has become a priority in combating multidrug resistance in bacteria; however, there is a lack of commercial live attenuated vaccine (LAV) against S. agalactiae in Malaysia. The aim of this study is to compare two methods using attenuated bacteria as live vaccine and to evaluate the efficacy of selected LAV on the immune responses and resistance of Oreochromis niloticus (tilapia) against S. agalactiae. The LAV derived from S. agalactiae had been weakened using the chemical agent Acriflavine dye (LAV1), whereas the second vaccine was weakened using serial passages of bacteria on broth media (LAV2). Initial immunization was carried out only on day one, given twice-in the morning and evening, for the 42 day period. Serum samples were collected to determine the systemic antibody (IgM) responses and lysozymal (LSZ) activity using ELISA. On day 43 after immunization, the fish were injected intraperitoneally (i.p) with 0.1 mL of S. agalactiae at LD50 = 1.5 × 105 (CFU)/fish. Fish were monitored daily for 10 days. Clinical signs, mortality and the relative percent of survival (RPS) were recorded. Trial 1 results showed a significant increased (P < 0.05) in serum IgM titers and LSZ activity as compared to LAV2 and the control group (unvaccinated fish). The efficacy of LAV1 was proven effective as determined by the RPS values, LAV1 at 81.58% as compared to LAV2 at 65.79%. Trial 2 of LAV1 and control group were further determined by administering primary and booster doses revealed a RPS value for LAV1 of 82.05%, with the significant enhancement on the immune responses of tilapia as compared to control group. In conclusion, LAV revealed to elevate antibody IgM levels, LSZ activity and provide long-term protection when added to feed. LAV is a low-cost vaccine shown to rapidly increase the immune response of fish and increase survival rates of fish against S. agalactiae infection.
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Affiliation(s)
- A A Laith
- School of Fisheries and Aquaculture Sciences, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia.
| | - M A Abdullah
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - W W I Nurhafizah
- School of Fisheries and Aquaculture Sciences, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - H A Hussein
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - J Aya
- Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - A W M Effendy
- School of Fisheries and Aquaculture Sciences, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia; Institute of Marine Biotechnology, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - M Najiah
- School of Fisheries and Aquaculture Sciences, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia; Institute of Tropical Aquaculture, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
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Liu L, Lu DQ, Xu J, Luo HL, Li AX. Development of attenuated erythromycin-resistant Streptococcus agalactiae vaccine for tilapia (Oreochromis niloticus) culture. JOURNAL OF FISH DISEASES 2019; 42:693-701. [PMID: 30893488 DOI: 10.1111/jfd.12977] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 01/11/2019] [Accepted: 01/13/2019] [Indexed: 06/09/2023]
Abstract
Streptococcus agalactiae is an important pathogen in fish, causing great losses of intensive tilapia farming. To develop a potential live attenuated vaccine, a re-attenuated S. agalactiae (named TFJ-ery) was developed from a natural low-virulence S. agalactiae strain TFJ0901 through selection of resistance to erythromycin. The biological characteristics, virulence, stability and the immunization protective efficacy to tilapia of TFJ-ery were determined. The results indicated that TFJ-ery grew at a slower rate than TFJ0901. The capsule thickness of TFJ-ery was significantly less (p < 0.05) than TFJ0901. When Nile tilapia were intraperitoneally (IP) injected with TFJ-ery, the mortality of fish was decreased than that injected with TFJ0901. The RPS of fish immunized with TFJ-ery at a dose of 5.0 × 107 CFU was 95.00%, 93.02% and 100.00% at 4, 8 and 16 weeks post-vaccination, respectively. ELISA results showed that the vaccinated fish produced significantly higher (p < 0.05) antibody titres compared to those of control at 2 or 4 weeks post-vaccination. Taken together, our results suggest that erythromycin could be used to attenuate S. agalactiae, and TFJ-ery is a potent attenuated vaccine candidate to protect tilapia against S. agalactiae infections.
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Affiliation(s)
- Ling Liu
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China
| | - Dan-Qi Lu
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China
| | - Jun Xu
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China
| | - Heng-Li Luo
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China
| | - An-Xing Li
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, PR China
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Xu H, Xing J, Tang X, Sheng X, Zhan W. Intramuscular administration of a DNA vaccine encoding OmpK antigen induces humoral and cellular immune responses in flounder (Paralichthys olivaceus) and improves protection against Vibrio anguillarum. FISH & SHELLFISH IMMUNOLOGY 2019; 86:618-626. [PMID: 30513384 DOI: 10.1016/j.fsi.2018.11.073] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 11/20/2018] [Accepted: 11/30/2018] [Indexed: 05/21/2023]
Abstract
Outer membrane protein K (OmpK) is an immunogenic protein that could act as subunit vaccine candidate for Vibrio anguillarum. In this study, a DNA vaccine encoding the OmpK gene of V. anguillarum was constructed and confirmed to express OmpK in vitro and in vivo. To evaluate the potential of pcDNA3.1-OmpK (pOmpK) as vaccine candidate, the humoral and cellular immune responses, and protective effects were analyzed in flounder model. The results showed that the transcription and translation of OmpK gene occurred in both transfected hirame natural embryo (HINAE) cells and injected fish muscles, indicating the functionality of pOmpK to express OmpK. Fish immunized with pOmpK showed significant increase of surface IgM positive (sIgM+), CD4-1+, CD4-2+ lymphocytes and production of specific anti-V. anguillarum or anti-rOmpK antibodies, which indicate the activation of humoral and cellular immune responses after vaccination. Moreover, a relative percent survival (RPS) rate of 50.00% against V. anguillarum infection was obtained for flounder immunized with pOmpK. In conclusion, this study indicates that pOmpK is able to induce humoral and cellular immune responses and can be used as a DNA vaccine candidate.
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Affiliation(s)
- Hongsen Xu
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China
| | - Jing Xing
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, No. 1 Wenhai Road, Aoshanwei Town, Qingdao, 266071, China.
| | - Xiaoqian Tang
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, No. 1 Wenhai Road, Aoshanwei Town, Qingdao, 266071, China
| | - Xiuzhen Sheng
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China
| | - Wenbin Zhan
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, No. 1 Wenhai Road, Aoshanwei Town, Qingdao, 266071, China
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