Marine actinomycetes as bioremediators in Penaeus monodon rearing system

Babu, Divya T.; Archana, K.; Kachiprath, Bhavya; Solomon, Solly; Jayanath, G.; Singh, I. S. Bright; Philip, Rosamma

doi:10.1016/j.fsi.2018.01.037

Cited by 17 publications

(28 citation statements)

References 44 publications

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“…The actinomycete strains were grown in 301 production agar (2.4% starch, 0.1% glucose, 0.3% peptone, 0.3% meat extract, 0.5% yeast extract, 0.4% calcium carbonate, and 1.5% agar) (Euanorasetr et al, 2010) by streaking at the center of the plate for 7 days. The tested bacteria were perpendicular, cross-streaked to the line of actinomycetes, and the plates were incubated at room temperature for 48 h (Balouiri et al, 2016). The inhibition zones were observed and recorded in millimeters compared to that of the control plate (without actinomycetes).…”

Section: Antibacterial Activity Of Actinomycetesmentioning

confidence: 99%

“…The actinomycete-like colonies on isolation plates were observed to have leathery or powdery characteristics according to the general characteristics of the Actinobacteria (Barka et al, 2016). The abundance of soil actinomycetes in each isolating condition is shown in Supplementary Figure 1.…”

Section: Amount Of Actinomycete and Isolationmentioning

confidence: 99%

“…Moreover, it could tolerate the presence of 0.3% bile salt, whereas the others could grow up since pH 4. From the literature, most Actinobacteria are mesophilic and grow in soils with a neutral pH, and they grow in the pH range from 6 to 9 (Barka et al, 2016), such that Streptomyces sp. MUM212, isolated from mangrove forests, could grow between pH 4 and 7 .…”

Section: Acid and Bile Salt Tolerance Testmentioning

confidence: 99%

“…Probiotics are defined as active microorganisms providing positive health effects to the hosts (de Vrese and Schrezenmeir, 2008). The proposed mechanisms of beneficial properties of probiotics comprise the reduction of pathogenic microorganisms, the promotion of the growth rate of the host, and improving the water quality (Babu et al, 2018;Das et al, 2010). The application of probiotics in aquaculture was initially evaluated by several research groups to ensure host safety and effectiveness against infectious diseases (Chen et al, 2019;.…”

Section: Introductionmentioning

confidence: 99%

“…Actinomycetes are mostly Gram-positive, filamentous bacteria in the phylum Actinobacteria, with high G+C DNA content in their genomes (Barka et al, 2016). They are ubiquitous with a wide range of natural habitats, soil, sediment, mangrove, and marine, and are well known as producers of secondary metabolites, which constitutes about 30% of the total microbial metabolites.…”

Section: Introductionmentioning

confidence: 99%

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Isolation and characterization of aerobic actinomycetes with probiotic properties in Nile tilapia

Euanorasetr¹,

Varissara²,

Wacharaporn³

et al. 2020

J App Pharm Sci

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This study scoped the isolation of aerobic actinomycetes with probiotic properties against bacterial pathogens in Nile tilapia. Eleven rhizosphere soil samples were collected from the agricultural sites in three provinces (Chanthaburi, Nan, and Chachoengsao) of Thailand. A total of 157 actinomycete-like colonies were successfully isolated. The antibacterial testing against four tested bacteria (Streptococcus agalactiae 2809, Aeromonas jandaei 1929, Aeromonas veronii 1930, and Edwardsiella ictaluri 2234) was carried out by a modified cross-streaked method. The results showed that 108 strains possessed antibacterial activity against at least one of the bacterial pathogens. Seventeen active isolates were identified in the actinomycetes by the analysis of the partial 16S ribosomal rRNA gene, and the phylogenetic relationships of the isolates and their closely related strains were confirmed by the neighbor-joining method. Isolates LNW002 and YNW004 survived in the liquid cultivation with International Streptomyces Project 2 at pH 2 and the presence of 0.3% bile salt for 2 hours, which mimics the gastric acidity and bile salt in the gastrointestinal tract of Nile tilapia in vitro. In conclusion, these strains might be further investigated for their efficacy as probiotics in Nile tilapia. This study is the first to report on anti-E. ictaluri activity in streptomycetes.

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Section: Antibacterial Activity Of Actinomycetesmentioning

confidence: 99%

Section: Amount Of Actinomycete and Isolationmentioning

confidence: 99%

Section: Acid and Bile Salt Tolerance Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Isolation and characterization of aerobic actinomycetes with probiotic properties in Nile tilapia

Euanorasetr¹,

Varissara²,

Wacharaporn³

et al. 2020

J App Pharm Sci

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Present Status, Limitations, and Prospects of Using Streptomyces Bacteria as a Potential Probiotic Agent in Aquaculture

Butt

Khan

Liu

et al. 2023

Probiotics & Antimicro. Prot.

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Streptomyces is a Gram-positive bacterium, belonging to the family Streptomycetaceae and order Streptomycetales. Several strains from different species of Streptomyces can be used to promote the health and growth of artificially cultured fish and shellfish by producing secondary metabolites including antibiotics, anticancer agents, antiparasitic agents, antifungal agents, and enzymes (protease and amylase). Some Streptomyces strains also exhibit antagonistic and antimicrobial activity against aquaculture-based pathogens by producing inhibitory compounds such as bacteriocins, siderophores, hydrogen peroxide, and organic acids to compete for nutrients and attachment sites in the host. The administration of Streptomyces in aquaculture could also induce an immune response, disease resistance, quorum sensing/antibiofilm activity, antiviral activity, competitive exclusion, modification in gastrointestinal microflora, growth enhancement, and water quality amelioration via nitrogen fixation and degradation of organic residues from the culture system. This review provides the current status and prospects of Streptomyces as potential probiotics in aquaculture, their selection criteria, administrative methods, and mechanisms of action. The limitations of Streptomyces as probiotics in aquaculture are highlighted and the solutions to these limitations are also discussed.

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