Bacillus Subtilis Spores for Aquatic Disease Control
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Solution Overview
Problem
Current methods for controlling enteric septicemia in aquaculture, such as using antibiotics, are costly, marginally effective, and contribute to antibiotic resistance, while existing probiotics lack rigorous scientific evaluation and regulatory approval.
Innovation Solution
Development of microbiocidal compositions and methods utilizing spore-forming strains of Bacillus, specifically Bacillus subtilis and Bacillus amyloliquefaciens, formulated as feed or environmental treatments to inhibit pathogenic bacteria and fungi in aquatic animals, including Aeromonas hydrophila, Edwardsiella ictaluri, and Saprolegnia, with concentrations of at least 10^4 CFU/g of feed or water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antibiotics are used to control enteric septicemia in aquaculture, then disease control effectiveness is improved, but antibiotic resistance develops and environmental harm increases
Solution Approach 1:
The patent introduces Bacillus subtilis and Bacillus amyloliquefaciens as intermediary beneficial bacteria that compete with pathogenic bacteria for resources and space in the aquatic animal digestive tract. These probiotic bacteria produce antimicrobial substances that indirectly inhibit pathogens without using antibiotics, thereby maintaining disease control effectiveness while avoiding antibiotic resistance and environmental contamination.
Solution Approach 2:
The patent converts the harmful effect of pathogenic bacteria into a beneficial outcome by using beneficial Bacillus strains that produce antimicrobial substances. These substances, naturally produced by the probiotic bacteria, serve as biological control agents that eliminate pathogens without the negative consequences of synthetic antibiotics, turning a harmful situation into a beneficial one.
2Reliability
If existing probiotics are used to treat aquatic animal diseases, then treatment effects are improved, but scientific evaluation and regulatory approval are lacking
Solution Approach 1:
The patent segments the probiotic market by focusing on specific, well-characterized Bacillus strains (B. subtilis and B. amyloliquefaciens) with documented antimicrobial activities against specific aquatic pathogens. This segmentation allows for targeted scientific evaluation and regulatory approval processes, rather than dealing with unstandardized mixed probiotic formulations.
Solution Approach 2:
The patent establishes specific parameter standards for the probiotic product, including minimum CFU counts (10^6-10^9 CFU/g), specific strain identifiers, and quantifiable antimicrobial activity measurements. These parameter changes enable rigorous scientific evaluation and facilitate regulatory approval by providing measurable, standardized quality criteria.
3Reliability
If spore-forming Bacillus strains are administered at high concentrations, then pathogenic bacteria inhibition is improved, but feed cost increases
Solution Approach 1:
The patent applies preliminary action by incorporating spore-forming Bacillus strains into the feed before the aquatic animals are exposed to pathogens. The probiotic bacteria establish colonization in the digestive tract in advance, creating a protective barrier that prevents pathogen invasion. This preliminary establishment of beneficial flora reduces the need for high concentrations during treatment phases.
Solution Approach 2:
The patent utilizes the spore formation capability of Bacillus strains, which allows the bacteria to transition between dormant spore states and active vegetative states. The spores survive feed processing and storage, then germinate in the aquatic animal digestive tract under favorable conditions, providing sustained protection without requiring continuously high concentrations in the feed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Significantly reduces mortality and disease incidence in aquatic animals by effectively inhibiting pathogenic microorganisms, offering a cost-effective, environmentally friendly alternative to antibiotics and providing a potential organic farming solution.
Implementation Method 1
spore-forming strains of Bacillus... comprising an effective amount of a spore-forming strain of Bacillus
Implementation Method 2
The antimicrobial activity against a particular pathogen is used as a primary criterion for selection of potential probiotic bacteria
Implementation Method 3
The beneficial effect to the host has been reported to be nutritional, immunological, and/or to involve competitive exclusion whereby potential pathogens are outcompeted in the digestive tract
Implementation Method 4
The beneficial effect to the host has been reported to be nutritional, immunological, and/or to involve competitive exclusion
Data Source
AI summary
Disclosed herein are microbiocidal compositions that include spore-forming strains of Bacillus. The compositions may be utilized to treat or prevent disease in aquatic animals such as farmed fish or crustaceans.