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Dinçtürk E. Determination of Raman spectrum under different culture conditions: preliminary research on bacterial fish pathogens. Anim Biotechnol 2024; 35:2299733. [PMID: 38166494 DOI: 10.1080/10495398.2023.2299733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
The intensive labour and time required for conventional methods to identify bacterial fish pathogens have revealed the need to develop alternative methods. Raman spectroscopy has been used in the rapid optical identification of bacterial pathogens in recent years as an alternative method in microbiology. Strains of bacterial fish pathogens (Vibrio anguillarum, Lactococcus garvieae and Yersinia ruckeri) that often cause infectious diseases in fish were here identified and analyzed in terms of their biochemical structures in different media and at different incubation times, and the data were specified by using Raman spectroscopy. The results demonstrated that Raman spectroscopy presents species-specific Raman spectra of each disease-causing bacteria and that it would be more appropriate to choose general microbiological media over selective media for routine studies. Additionally, it was found that species-specific band regions did not differ in 24- and 48-hour cultures, but there could be a difference in peak intensity which may lead to difficult characterization of spectrum. The current study, conducted for the first time with bacterial fish pathogens under different incubation conditions, is believed to provide a basis for the routine use of Raman spectroscopy for quick pathogen identification and the precise determination of the methodology for further research.
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Affiliation(s)
- Ezgi Dinçtürk
- Fish Disease and Biotechnology Laboratory, Department of Aquaculture, Izmir Katip Celebi University, Izmir, Türkiye
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Feito J, Araújo C, Gómez-Sala B, Contente D, Campanero C, Arbulu S, Saralegui C, Peña N, Muñoz-Atienza E, Borrero J, del Campo R, Hernández PE, Cintas LM. Antimicrobial activity, molecular typing and in vitro safety assessment of Lactococcus garvieae isolates from healthy cultured rainbow trout (Oncorhynchus mykiss, Walbaum) and rearing environment. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113496] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Baños A, Ariza JJ, Nuñez C, Gil-Martínez L, García-López JD, Martínez-Bueno M, Valdivia E. Effects of Enterococcus faecalis UGRA10 and the enterocin AS-48 against the fish pathogen Lactococcus garvieae. Studies in vitro and in vivo. Food Microbiol 2018; 77:69-77. [PMID: 30297058 DOI: 10.1016/j.fm.2018.08.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 07/31/2018] [Accepted: 08/02/2018] [Indexed: 01/15/2023]
Abstract
The aim of this study was to evaluate the effects of Enterococcus faecalis UGRA10 and its enterocin AS-48 against the fish pathogen Lactococcus garvieae. The minimum bactericidal concentrations of AS-48 against L. garvieae CECT 5807, 5806, and 5274 were 15.62, 15.62, and 7.81 μg/ml respectively. In broth cultures, enterocin at 100, 50, and 25 μg/ml reduced 108 CFU/ml lactococci after 2, 5, and 10 h, respectively. In co-cultures of UGRA10/L. garvieae at a 1/10 CFU/ml ratio, lactococci were eliminated after 24 h. Studies on UGRA10 biosafety and AS-48 toxicity in R1 cells and in rainbow trout have shown a lack of adverse effects from both the strain and bacteriocin. Trout challenged with L. garvieae and UGRA10 administered in diet 30 days before infection had a cumulative survival rate of 50% compared with 0% for control fish. Trout inoculated with the pathogen and treated by regular dipping in AS-48 baths had a survival rate of 60% after 20 days compared with that of untreated fish (0%). These results indicate the protective effect of the UGRA10 strain and the bacteriocin AS-48 against L. garvieae and the potential of these natural products as alternatives to antibiotics for controlling diseases in aquaculture.
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Affiliation(s)
- Alberto Baños
- Department of Microbiology, DMC Research Center, Camino de Jayena s/n, 18620, Granada, Spain
| | - Juan José Ariza
- Department of Microbiology, DMC Research Center, Camino de Jayena s/n, 18620, Granada, Spain
| | - Cristina Nuñez
- Department of Microbiology, DMC Research Center, Camino de Jayena s/n, 18620, Granada, Spain
| | - Lidia Gil-Martínez
- Department of Microbiology, DMC Research Center, Camino de Jayena s/n, 18620, Granada, Spain
| | - J David García-López
- Department of Microbiology, DMC Research Center, Camino de Jayena s/n, 18620, Granada, Spain
| | - Manuel Martínez-Bueno
- Department of Microbiology, University of Granada, Fuente Nueva s/n, 19071, Granada, Spain; Institute of Biotechnology, University of Granada, 18071, Granada, Spain
| | - Eva Valdivia
- Department of Microbiology, University of Granada, Fuente Nueva s/n, 19071, Granada, Spain; Institute of Biotechnology, University of Granada, 18071, Granada, Spain.
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Meyburgh CM, Bragg RR, Boucher CE. Lactococcus garvieae: an emerging bacterial pathogen of fish. DISEASES OF AQUATIC ORGANISMS 2017; 123:67-79. [PMID: 28177294 DOI: 10.3354/dao03083] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Lactococcus garvieae is the causative agent of lactococcosis, a hyperacute, haemorrhagic septicaemia of fish. This bacterium is also considered an emerging zoonotic pathogen, as reports of human infection are increasing. Significant economic loss in aquaculture is suffered as a result of lactococcosis, as numerous freshwater and marine species of commercial interest are affected. Development of antibiotic resistance in L. garvieae to several chemotherapeutic agents complicates and restricts treatment options. Effective, sustainable treatment and prevention options are thus needed, but progress is impeded by the lack of knowledge concerning several aspects of the disease and the pathogen. This review aims to present the latest research on L. garvieae, with specific focus on pathogenesis, virulence factors, risks associated with chemotherapeutic administration and possible control options.
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Affiliation(s)
- C M Meyburgh
- Department of Microbial, Biochemical & Food Biotechnology, University of the Free State, Bloemfontein, South Africa
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