Identification and Characterization of Actinomycetes Antagonistic to Pathogenic Vibrio spp. Isolated from Shrimp Culture Pond Sediments in Thua Thien Hue-Viet Nam

Chau, Ngo Thi Tuong; Hiểu, Nguyễn Xuân; Thuan, Le Thi Nam; Matsumoto, Masaru; Miyajima, Ikuo; 松本, 賢; 宮島, 郁夫

doi:10.5109/19532

Cited by 3 publications

(2 citation statements)

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“…48,49,119,122,141,142 Several studies have been demonstrated in fish and shellfish aquaculture using actinomycetes as antimicrobial sources. 41,59,60,68,99,101,107,111,123,128,131,133,134,137,[143][144][145][196][197][198][199][200] The different species of Actinomycetes used in aquaculture over the years have been summarized in Table 1.…”

Section: Actinomycetes As Antimicrobial and Anti-parasitic Agents In ...mentioning

confidence: 99%

“…have been studied and found to kill the theronts and tomonts of Ichthyophthirius multifiliis and Cryptocaryon irritans 48,49,119,122,141,142 . Several studies have been demonstrated in fish and shellfish aquaculture using actinomycetes as antimicrobial sources 41,59,60,68,99,101,107,111,123,128,131,133,134,137,143–145,196–200 …”

Section: Actinomycetes As Antimicrobial and Anti‐parasitic Agents In ...mentioning

confidence: 99%

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Actinomycetes as a promising candidate bacterial group for the health management of aquaculture systems: A review

Sunish¹,

Sreedharan

Nazreen³

2022

Reviews in Aquaculture

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Aquaculture is one of the most important economic activities in the world. However, the intensification of culture practices resulted in the emergence of various diseases caused by microorganisms and non-infectious diseases caused mainly by the deterioration of water quality. Several prophylactic and treatment options have been exploited over the years to tackle the disease problem in aquaculture. Previously, antibiotics have been used indiscriminately for treating many fish diseases which resulted in the emergence of antimicrobial resistance. To overcome the failure of existing management strategies, innovative antimicrobial drug research is crucial and actinomycetes have proven to be trustworthy sources of new antimicrobial chemicals and are one of the most economically and biotechnologically important bacteria with multitude of functions. This review updates and highlights the role of actinomycetes in encouraging sustainable aquaculture practices and identifies opportunities for additional research and development. Many genera of actinomycetes were found to enhance the growth and survival of cultured species by producing many nutritional factors. They also improve the water quality of culture systems by the production of hydrolytic enzymes. Actinomycetes were found to improve the immunity of aquatic organisms by augmenting many immune parameters and making them more resistant to infection. Many actinomycetes have been discovered to produce antagonistic substances and exhibited antibacterial, antiviral, antibiofilm and anti-quorum sensing activities. Probiotic potential of many actinomycetes has been widely explored. Even though actinomycetes have been widely used in aquaculture for multi purposes, the exact mechanism of action of these bacterial groups is poorly understood and novel biotechnological tools can be used for unravelling this.

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Section: Actinomycetes As Antimicrobial and Anti-parasitic Agents In ...mentioning

confidence: 99%

Section: Actinomycetes As Antimicrobial and Anti‐parasitic Agents In ...mentioning

confidence: 99%

Actinomycetes as a promising candidate bacterial group for the health management of aquaculture systems: A review

Sunish¹,

Sreedharan

Nazreen³

2022

Reviews in Aquaculture

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Isolation and Identification of Probiotics Microorganisms

Venugopal,

Manikkam,

Manigundan

et al. 2023

Methods and Protocols in Food Science

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Isolation and in vitro selection of actinomycetes strains as potential probiotics for aquaculture

Bernal¹,

Campa‐Córdova²,

Saucedo³

et al. 2015

Vet World

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Aim:This study was designed to describe a series of in vitro tests that may aid the discovery of probiotic strains from actinomycetes.Materials and Methods:Actinomycetes were isolated from marine sediments using four different isolation media, followed by antimicrobial activity and toxicity assessment by the agar diffusion method and the hemolysis of human blood cells, respectively. Extracellular enzymatic production was monitored by the hydrolysis of proteins, lipids and carbohydrates. Tolerance to different pH values and salt concentrations was also determined, followed by hydrophobicity analysis and genetic identification of the most promising strains.Results:Five out of 31 isolated strains showed antimicrobial activity against three Vibrio species. Three non-hemolytic strains (N7, RL8 and V4) among these active isolates yielded positive results in hydrophobicity tests and exhibited good growth at salt concentrations ranging from 0% to 10%, except strain RL8, which required a salt concentration >0.6%. Although these strains did not grow at pH<3, they showed different enzymatic activities. Phylogenetic analysis revealed that strains N7 and V4 have more than 99% identity with several Streptomyces species, whereas the closest matches to strain RL8 are Streptomyces panacagri and Streptomyces flocculus, with 98% and 98.2% similarity, respectively.Conclusion:Three actinomycetes strains showing probiotic-like properties were discovered using several in vitro tests that can be easily implemented in different institutions around the world.

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Identification and Characterization of Actinomycetes Antagonistic to Pathogenic Vibrio spp. Isolated from Shrimp Culture Pond Sediments in Thua Thien Hue-Viet Nam

Cited by 3 publications

References 0 publications

Actinomycetes as a promising candidate bacterial group for the health management of aquaculture systems: A review

Actinomycetes as a promising candidate bacterial group for the health management of aquaculture systems: A review

Isolation and Identification of Probiotics Microorganisms

Isolation and in vitro selection of actinomycetes strains as potential probiotics for aquaculture

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