Composition of Extracellular Polymeric Substances (EPS) produced by Flavobacterium columnare isolated from tropical fish in Brazil

Sebastião, Fernanda de Alexandre; Pilarski, Fabiana; Lemos, Manoel Victor Franco

doi:10.1590/s1517-83822013005000058

Cited by 22 publications

(8 citation statements)

References 15 publications

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“…), Flavobacterium columnare (Sebastião et al . ), Aeromonas hydrophila (Griffin et al . ), Edwardsiella tarda and Edwardsiella ictaluri (Park et al .…”

Section: In Vitro Assessment Of Eos Properties Against Fish Bacterialmentioning

confidence: 99%

The effects of essential oils and their major compounds on fish bacterial pathogens – a review

2018

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The increased resistance of fish pathogens to conventional treatments has lead researchers to investigate the antibacterial properties of natural resources, such as essential oils (EOs) of plants, in an effort to find products that are less harmful to the environment. The objective of this review is to provide an overview of the studies, in vivo and in vitro, that addressed the use of EOs and their major compounds as antimicrobial agents in fish, to identify the best EOs and compounds to investigate considering feasibility of application and suggest possible future studies. To date, studies suggest that the use of EOs in the prevention and/or treatment of infectious diseases in fish may be a promising strategy to reduce the use of conventional antibiotics in aquaculture, since several EOs effectively reduce or avoid the effects of bacterial infections in fish. The use of EOs through nanotechnology delivery systems, especially in dietary supplementation experiments, is promising. This form of application of the EOs allows a potentiation and targeting of the desired effect of the EOs and also allows the protection of EOs active constituents against enzymatic hydrolysis, deserving further study.

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“…), Flavobacterium columnare (Sebastião et al . ), Aeromonas hydrophila (Griffin et al . ), Edwardsiella tarda and Edwardsiella ictaluri (Park et al .…”

Section: In Vitro Assessment Of Eos Properties Against Fish Bacterialmentioning

confidence: 99%

The effects of essential oils and their major compounds on fish bacterial pathogens – a review

2018

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“…are also tolerant of alkaline conditions and some species are known to produce acid [185][186][187]; whereas Salinibacter ruber does neither [188]. Non-pigmented halophilic genera with potential applications for bauxite residue bioremediation include Vibrio, Flavobacterium, Alcaligenes, Alteromonas, Halomonas, Bacillus, Salinicoccus, Pseudomonas, and Chromobacterium [183], many of which have a broad pH tolerance (pH 5-11), produce EPS (0.001-700 mg/L, with high concentrations of glucose and uronic acids) and produce NH 4 + [189][190][191][192][193][194][195]. The prevalence of haloalkalitolerance combined with capacity to produce acids and/or EPS and fix nutrients including C and N suggests that organisms from hypersaline environments may be valuable in the remediation of bauxite residues, with various species having potential for tolerating the extreme conditions, lowering the pH, forming soil aggregates, improving drainage, fixing nutrients and stabilising the surface.…”

Section: Hypersaline Lakes Salt Pans and Salternsmentioning

confidence: 99%

Microbially-driven strategies for bioremediation of bauxite residue

Santini

Kerr

Warren

2015

Journal of Hazardous Materials

117

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Globally, 3 Gt of bauxite residue is currently in storage, with an additional 120 Mt generated every year. Bauxite residue is an alkaline, saline, sodic, massive, and fine grained material with little organic carbon or plant nutrients. To date, remediation of bauxite residue has focused on the use of chemical and physical amendments to address high pH, high salinity, and poor drainage and aeration. No studies to date have evaluated the potential for microbial communities to contribute to remediation as part of a combined approach integrating chemical, physical, and biological amendments. This review considers natural alkaline, saline environments that present similar challenges for microbial survival and evaluates candidate microorganisms that are both adapted for survival in these environments and have the capacity to carry out beneficial metabolisms in bauxite residue. Fermentation, sulfur oxidation, and extracellular polymeric substance production emerge as promising pathways for bioremediation whether employed individually or in combination. A combination of bioaugmentation (addition of inocula from other alkaline, saline environments) and biostimulation (addition of nutrients to promote microbial growth and activity) of the native community in bauxite residue is recommended as the approach most likely to be successful in promoting bioremediation of bauxite residue.

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“…EOs may represent a promising alternative to antimicrobials for bacterial disease treatments in aquaculture. The in vitro antibacterial activity of several EOs has been evaluated against a variety of Gram‐positive and Gram‐negative bacteria, including major pathogens of aquaculture such as Streptococcus agalactiae (Zhang et al, ), Flavobacterium columnare (Sebastiao, Pilarski, & Lemos, ), Aeromonas hydrophila (Griffin et al, ), Edwardsiella tarda and Edwardsiella ictaluri (Hawke et al, ; Park, Aoki, & Jung, ). In host‐challenge studies, EOs incorporated into feed have been effective in reducing mortality.…”

Section: Introductionmentioning

confidence: 99%

In vitro antibacterial activity of four nano-encapsulated herbal essential oils against three bacterial fish pathogens

Gholipourkanani

Buller²,

Lymbery

2019

Aquac Res

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Bacterial pathogens causing diseases in fishes have broad host ranges, and may cause high mortality or ongoing chronic infections. Pathogen treatments using antibiotics are becoming limited due to increasing concerns for the development of resistance and environmental dissemination of bacteria harboring resistance genes.This study aimed to determine whether nano-emulsions of selected plant-derived essential oils (Origanum vulgare, Eucalyptus globulus, Melaleuca alternifolia and Lavendula angustifolia) were bacteriostatic or bactericidal to Aeromonas hydrophila, Streptococcus iniae and Photobacteriumdamselae subspecies damselae. All treatments showed antibacterial activity, and in almost all cases the activity of the nano-emulsions was superior to their essential oil counterparts. Origanum vulgare (oregano) nano-emulsion had the most effective antibacterial activity, with a minimal inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of 3.12 µg/ml against all three species; substantially better than tetracycline. The present study highlights the potential of new formulations of essential oils to enhance bacterial disease control in cultured fish.

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Composition of Extracellular Polymeric Substances (EPS) produced by Flavobacterium columnare isolated from tropical fish in Brazil

Cited by 22 publications

References 15 publications

The effects of essential oils and their major compounds on fish bacterial pathogens – a review

The effects of essential oils and their major compounds on fish bacterial pathogens – a review

Microbially-driven strategies for bioremediation of bauxite residue

In vitro antibacterial activity of four nano-encapsulated herbal essential oils against three bacterial fish pathogens

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