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Zhou S, Yang Z, Guo B, Yi J, Pang Y, Feng R, Song J, Xiu Y. Rapid Visual Detection of Spiroplasma eriocheiris by Loop-Mediated Isothermal Amplification with Hydroxynaphthol Blue Dye. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2024; 26:116-124. [PMID: 38170295 DOI: 10.1007/s10126-023-10282-9] [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: 10/13/2023] [Accepted: 12/22/2023] [Indexed: 01/05/2024]
Abstract
In recent years, a new type of Spiroplasma has been found that can cause "tremor disease" of the Chinese mitten crab Eriocheir sinensis. The outbreak of epidemic tremor disease has caused a serious setback in the Chinese mitten crab farming industry, with an incidence rate of more than 30% and mortality rates of 80-100%. Therefore, finding a sensitive method to detect tremor disease in E. sinensis has become a current research focus. In this research, a loop-mediated isothermal amplification detection method coupled with hydroxynaphthol blue dye (LAMP-HNB) was developed and used to rapidly detect Spiroplasma eriocheiris. First, we designed and synthesized specific outer primers, inner primers and loop primers based on the 16S ribosomal RNA gene of S. eriocheiris. Second, the LAMP-HNB detection method for S. eriocheiris was successfully established by screening the primers, adjusting the temperature and time of the reaction, and optimizing the concentrations of Mg2+ and dNTPs. In the specific tests, only samples infected with S. eriocheiris showed positive results, and other infections caused by bacteria and parasites tested negative, proving that the test has high specificity. Moreover, the detection limit was 2.5 × 10-6 ng/µL, indicating high sensitivity. This method for detecting S. eriocheiris provides rapid visual output based on LAMP-HNB detection and is a simple, fast, sensitive, and inexpensive method that can be applied to a wide range of field investigations.
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Affiliation(s)
- Shun Zhou
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Zongrui Yang
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Baoshan Guo
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Jingyuan Yi
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Yunfei Pang
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Ruixin Feng
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Jiaxue Song
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Yunji Xiu
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China.
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Ding W, Miao Q, Bao X, Wang S, Lu J, Lyu M, Wang S. On-site detection of fish furunculosis by combining DNAzyme and carboxyl-functionalized graphene. Front Chem 2022; 10:1015827. [DOI: 10.3389/fchem.2022.1015827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 08/23/2022] [Indexed: 11/13/2022] Open
Abstract
Furunculosis, which is caused by Aeromonas salmonicida, can induce septicemia, leading to the rapid death of fishes belonging to Salmonidae, Cyprinidae, and Fuscheridae, and lamprey. Targeting A. salmonicida, five DNAzyme sequences with the highest enrichment rates were selected through the Systematic Evolution of Ligands by Exponential Enrichment (SELEX). The enrichment rates were 34.78, 23.60, 8.91, 2.89, and 2.34%, respectively. The DNAzyme with the highest activity, named D-AS-2, showed specificity and sensitivity. D-AS-2 was combined with carboxyl-functionalized graphene to construct a biosensor, which showed good fluorescence response to scabies lesion samples. The diagnostic procedure was completed in <2 min and can be used for the on-site diagnosis of fish diseases. A low-cost, rapid, simple, and highly specific biosensor for the diagnosis of furunculosis was established based on DNAzyme and carboxyl-functionalized graphene.
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Zhou S, Huang Q, Yu M, Li Y, Zheng X, Xiu Y. Rapid visual detection of Aeromonas salmonicida by loop-mediated isothermal amplification with hydroxynaphthol blue dye. JOURNAL OF FISH DISEASES 2021; 44:1993-2001. [PMID: 34411329 DOI: 10.1111/jfd.13513] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 07/26/2021] [Accepted: 07/28/2021] [Indexed: 06/13/2023]
Abstract
To make crucial prevention, reduce fish losses and minimize the economic damage of diseases on the fish farm owners, a rapid detection of fish pathogens is mandatory. In this study, a loop-mediated isothermal amplification assay combined with hydroxynaphthol blue dye (LAMP-HNB) was developed and used for the rapid detection of Aeromonas salmonicida that caused significant economic losses in fish farming. Firstly, a pair of outer and inner primers specific for conserved fragment of vapA gene in A. salmonicida were designed and synthesized. Secondly, by optimizing the reaction conditions including reaction temperature, time, Mg2+ concentration, dNTP concentration and primer ratio, a LAMP-HNB assay was successfully established for the detection of A. salmoncida. Thirdly, the assay showed good specificity with no false-positive and false-negative results, and good sensitivity with the detection limit of 3.077 × 10-6 ng/μl, which was 102 times more sensitive than the conventional PCR. Finally, the LAMP-HNB assay was validated by the fish samples inoculated with different concentrations of A. salmoncida. This is the first development of rapid visual detection of A. salmonicida based on LAMP-HNB assay, which has great application prospect and market for diagnostic testing, health certification and active surveillance programmers.
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Affiliation(s)
- Shun Zhou
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Qing Huang
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Mingming Yu
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Ying Li
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Xujia Zheng
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Yunji Xiu
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
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Brinchmann MF. Immune relevant molecules identified in the skin mucus of fish using -omics technologies. MOLECULAR BIOSYSTEMS 2017; 12:2056-63. [PMID: 27173837 DOI: 10.1039/c5mb00890e] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review will give an overview of immune relevant molecules in fish skin mucus. The skin of fish is continuously exposed to a water environment, and unlike that of terrestrial vertebrates, it is a mucosal surface with a thin epidermis of live cells covered by a mucus layer. The mucosa plays an important role in maintaining the homeostasis of the fish and preventing the entry of invading pathogens. This review provides an overview of proteins, RNA, DNA, lipids and carbohydrates found in the skin mucus of studied species. Proteins such as actin, histones, lectins, lysozyme, mucin, and transferrin have extracellular immune relevant functions. Complement complement molecules, heat shock molecules and superoxide dismutase present in mucus show differential expression during pathogen challenge in some species, but their functions in mucus, if any, need to be shown. RNA, DNA, lipids, carbohydrates and metabolites in mucus have been studied to a limited extent in fish, the current knowledge is summarized and knowledge gaps are pointed out.
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Fernández-Álvarez C, González SF, Santos Y. Development of a SYBR green I real-time PCR assay for specific identification of the fish pathogen Aeromonas salmonicida subspecies salmonicida. Appl Microbiol Biotechnol 2016; 100:10585-10595. [PMID: 27838837 DOI: 10.1007/s00253-016-7929-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 10/03/2016] [Accepted: 10/10/2016] [Indexed: 10/20/2022]
Abstract
A SYBR Green I real-time polymerase chain reaction protocol for specific detection of the fish pathogen Aeromonas salmonicida subsp. salmonicida was developed and validated for rapid diagnosis of typical furunculosis. The sequence of the aopO gene of A. salmonicida subsp. salmonicida, which encodes for a serine/threonine protein kinase linked to virulence, was chosen for primer design. The selected primers amplified a 119-bp internal fragment of the aopO gene. The specificity test proved that 100 % (40/40) of the A. salmonicida subsp. salmonicida strains tested showed a positive amplification with subspecies-specific melting temperatures (Tm) of 80.75 ± 0.35 °C. Atypical A. salmonicida subspecies and other non-related bacterial fish pathogens did not amplify or showed unspecific melting profiles, except for one strain of A. salmonicida subsp. achromogenes and one strain of A. salmonicida subsp. smithia. The detection sensitivity was 21 fg of purified bacterial DNA per reaction, corresponding to 1-2 bacterial cells and 6-60 bacteria per reaction for seeded kidney and blood. The assay was highly reproducible with low variation coefficient values for intra-run and inter-run assays. The assay also allowed the specific detection of A. salmonicida subsp. salmonicida in tissues of fish naturally and experimentally infected. No amplification was detected when tissues from healthy fish or fish affected by other diseases were tested. The SYBR Green real-time PCR and melt curve analysis developed in this study is a rapid and accurate method for the specific identification of A. salmonicida subsp. salmonicida isolates and its detection on tissues of fish affected by furunculosis.
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Affiliation(s)
- Clara Fernández-Álvarez
- Departamento de Microbiología y Parasitología, Edificio CIBUS Facultad de Biología and Instituto de Investigación y Análisis Alimentario, Universidad de Santiago de Compostela, 15782, Santiago de Compostela, Spain.
| | - Santiago F González
- Institute for Research in Biomedicine, Università della Suvizzera Italiana, 6500, Bellinzona, Switzerland
| | - Ysabel Santos
- Departamento de Microbiología y Parasitología, Edificio CIBUS Facultad de Biología and Instituto de Investigación y Análisis Alimentario, Universidad de Santiago de Compostela, 15782, Santiago de Compostela, Spain
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Zhao P, Wu Y, Zhu Y, Yang X, Jiang X, Xiao J, Zhang Y, Li C. Upconversion fluorescent strip sensor for rapid determination of Vibrio anguillarum. NANOSCALE 2014; 6:3804-9. [PMID: 24577708 DOI: 10.1039/c3nr06549a] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Here, we report a simple and ultrasensitive upconversion fluorescent strip sensor based on NaYF4:Yb,Er nanoparticles (NPs) and the lateral flow immunochromatographic assay (LFIA). Carboxyl-modified β-NaYF4:Yb,Er NPs were successfully synthesized by a facile one-pot solvothermal approach, upon further coupling with monoclonal antibody, the resultant UCNPs-antibody conjugates probes were used in LFIA and served as signal vehicles for the fluorescent reporters. V. anguillarum was used as a model analyte to demonstrate the use of this strip sensor. The limit of the detection for the fluorescent strip was determined as 10(2) CFU mL(-1), which is 100 times lower than those displayed by enzyme-linked immunosorbent assays, while the time needed for the detection was only 15 min. Furthermore, no cross-reaction with other eight pathogens was found, indicating the good specificity of the strip. This developed LFIA would offer the potential as a useful tool for the quantification of pathogens analysis in the future.
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Affiliation(s)
- Peng Zhao
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
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Loop-mediated isothermal amplification (LAMP) assays for detection and identification of aquaculture pathogens: current state and perspectives. Appl Microbiol Biotechnol 2014; 98:2881-95. [DOI: 10.1007/s00253-014-5531-z] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 01/08/2014] [Accepted: 01/09/2014] [Indexed: 11/26/2022]
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The improved PCR of the fstA (ferric siderophore receptor) gene differentiates the fish pathogen Aeromonas salmonicida from other Aeromonas species. Vet Microbiol 2013; 166:659-63. [DOI: 10.1016/j.vetmic.2013.06.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 05/08/2013] [Accepted: 06/19/2013] [Indexed: 11/17/2022]
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