“…There are several criteria for bacteria to recognize as probiotic. One of the most important features is tolerance to low pH and high bile salt concentrations 6 . They must overcome physical and chemical barriers in the gastrointestinal tract to be able to transit through the stomach.…”
Section: Discussionmentioning
confidence: 99%
“…The application of probiotics as one of the useful feed additives have a significant impact on disease resistance, growth, immune response, and other beneficial effects on the culture host. It has been shown that the use probiotics increases resistance to diseases of fish and shrimp, strengthens immunity and improves water quality 6 . Moreover, as an environmentally friendly strategy, probiotics have been proposed as a means for combating disease outbreaks and preventative treatments.…”
Section: Introductionmentioning
confidence: 99%
“…The broad antibacterial spectrum of probiotics and their strong antibacterial activity against pathogens are their important functional properties 8 . In addition to working on the principle of exclusion of competitors and using immune-stimulators to combat illness, probiotic bacteria produce digestive enzymes that improve digestion, thereby improving host stress tolerance and health 6 . Probiotics generally exhibit antibacterial, antiviral, and antifungal properties 9 .…”
This research aimed to isolate lactic acid bacteria from the bowel of saltwater fish to assess their potential probiotic properties. Nineteen isolates of LAB including Lactiplantibacillus plantarum, Lactiplantibacillus pentosus, Lactobacillus acidophilus, Levilactobacillus brevis, Pediococcus pentosaceus, and Pediococcus acidilactici were recognized using molecular tools. All the isolates survived in the simulated conditions of the GI tract. Auto-aggregation ranged from 01.3 ± 0.5 to 82.6 ± 1.4% and hydrophobicity with toluene ranged from 3.7 ± 1.6 to 69.4 ± 1.3%, while the range of hydrophobicity with xylene was from 02.2 ± 1.6 to 56.4 ± 2.1%. All the isolates of lactobacilli, pediococci, enterococci, and lactococci indicated variable sensitivity and resistance towards clinical antibiotics. Non-neutralized cell free supernatant of isolates F12 and F15 showed antimicrobial activity against all the 8 evaluated enteric pathogens. Cluster analysis of identified potential probiotic bacteria based on heat-map and PCA methods also highlighted the priority of isolates F3, F7, F12, and F15 as bio-control agents in fishery industry. The findings of this study may essentially contribute to the understanding of the probiotic potential of LAB in saltwater fish, in order to access their probiotic characterization for use as biocontrol in fishery.
“…There are several criteria for bacteria to recognize as probiotic. One of the most important features is tolerance to low pH and high bile salt concentrations 6 . They must overcome physical and chemical barriers in the gastrointestinal tract to be able to transit through the stomach.…”
Section: Discussionmentioning
confidence: 99%
“…The application of probiotics as one of the useful feed additives have a significant impact on disease resistance, growth, immune response, and other beneficial effects on the culture host. It has been shown that the use probiotics increases resistance to diseases of fish and shrimp, strengthens immunity and improves water quality 6 . Moreover, as an environmentally friendly strategy, probiotics have been proposed as a means for combating disease outbreaks and preventative treatments.…”
Section: Introductionmentioning
confidence: 99%
“…The broad antibacterial spectrum of probiotics and their strong antibacterial activity against pathogens are their important functional properties 8 . In addition to working on the principle of exclusion of competitors and using immune-stimulators to combat illness, probiotic bacteria produce digestive enzymes that improve digestion, thereby improving host stress tolerance and health 6 . Probiotics generally exhibit antibacterial, antiviral, and antifungal properties 9 .…”
This research aimed to isolate lactic acid bacteria from the bowel of saltwater fish to assess their potential probiotic properties. Nineteen isolates of LAB including Lactiplantibacillus plantarum, Lactiplantibacillus pentosus, Lactobacillus acidophilus, Levilactobacillus brevis, Pediococcus pentosaceus, and Pediococcus acidilactici were recognized using molecular tools. All the isolates survived in the simulated conditions of the GI tract. Auto-aggregation ranged from 01.3 ± 0.5 to 82.6 ± 1.4% and hydrophobicity with toluene ranged from 3.7 ± 1.6 to 69.4 ± 1.3%, while the range of hydrophobicity with xylene was from 02.2 ± 1.6 to 56.4 ± 2.1%. All the isolates of lactobacilli, pediococci, enterococci, and lactococci indicated variable sensitivity and resistance towards clinical antibiotics. Non-neutralized cell free supernatant of isolates F12 and F15 showed antimicrobial activity against all the 8 evaluated enteric pathogens. Cluster analysis of identified potential probiotic bacteria based on heat-map and PCA methods also highlighted the priority of isolates F3, F7, F12, and F15 as bio-control agents in fishery industry. The findings of this study may essentially contribute to the understanding of the probiotic potential of LAB in saltwater fish, in order to access their probiotic characterization for use as biocontrol in fishery.
“…The successful application of such probiotics has been found to enhance both local intestinal immunity and the innate immune system, resulting in high resistance against pathogen invaders (Ringø, 2020). Additionally, fish fed host-derived probiotics have demonstrated heightened mucosal immunities and antibacterial capacities (Butt et al, 2021;Puvanasundram et al, 2021).…”
This investigation was performed to assess the influences of the host-associated probiotic Bacillus altitudinis B61-34b (BAA) on growth, immune response and disease resistance to Streptococcus agalactiae in Nile tilapia (Oreochromis niloticus). Fish (25.50 ± 0.52 g fish −1 ) were distributed into 15 aquaria (150 litres tank −1 ) at density of 20 fish tank −1 . The fish were fed basal diets with BAA inclusions in different concentrations: 0 (BAA1-Control), 10 6 (BAA2), 10 7 (BAA3), 10 8 (BAA4) and 10 9 (BAA5) CFU ml −1 for 8 weeks. A completely randomized design with three replications was used. The results indicated that BAA administration generated greater (p < 0.05) skin mucus and peroxidase activities compared to the control, with maximum levels recorded in BAA4 and BAA5. Higher serum immunities, such as serum lysozyme, serum peroxidase, complement, phagocytosis and respiratory burst activities were observed in the BAA4 and BAA5 dietary groups compared to the control, BAA1, BAA2 and BAA3 diets. The relative percentage of survival, growth performance and FCR were also significantly higher (p < 0.05) in the BAA4 and BAA5 groups. In conclusion, dietary supplementation of B. altitudinis at 10 8 CFU ml −1 can improve Nile tilapia's growth performance, skin mucus and serum immunities, and disease resistance.
“…Also, probiotics are capable of fighting against some pathogenic bacteria including Lactobacillus sp ., Bifidobacterium , Lactococcus , and Streptococcus sp. (Puvanasundram et al, 2021; Yang et al, 2015). The contribution of aquatic animal protein to the global, animal source protein supply is 43% of the aquatic food consumption worldwide, and the relative importance of aquaculture in fisheries in supply assessment and decisions related to aquatic production and production of finfish, molluscs, and crustaceans is known (Boyd et al, 2022).…”
Section: Types Of Natural Feed Additives and Their Functions In Aquac...mentioning
Aquaculture is one of the most developing sectors worldwide, and it contributes to enhancing the global production. The application of natural feed additives is an external source of aquaculture production due to the ban on antibiotics as a growth promotor as well as their harmful effects on the host, and costeffectiveness. Even consumer concerns those antibiotics can cause the water quality and growth instead of growth promoters of natural feed additives to improve the aquaculture production. The role of feed additives is to control the pathogenic microbes, enhance their growth, immune stimulation, and ensure water quality. For these reasons, several types of dietary feed additives are used in the livestock sector, such as essential oil, essential fatty acid, probiotics, prebiotics, symbiotic, and exogenous enzymes, but here, the feed additives of probiotics' most relevant applications in the aquaculture field in terms of modes of action such as strengthening the immune response, competition of binding sites, production of antipathogenic substances, and growth performance competition for nutrition are described. These additives are considered to be useful for their specific medicinal properties and eco-friendly metabolism in the digestive system. This review describes the role of various feed additives and their relevance to aquaculture production quality.
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