Seaweed-Andrographolide Feed Additive for Aquaculture Pathogen Control

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Solution Overview

Problem

Existing aquaculture methods for disease prevention in fish, such as antibiotics and vaccines, face challenges like antibiotic resistance, residue issues, high cost, and ineffectiveness against intracellular pathogens, while alternative plant extract compositions like FUTERPENOL® do not provide adequate protection.

Innovation Solution

A modified aquaculture feed additive comprising whole dried and powdered seaweed combined with andrographolide in a 95:5 ratio, enhancing gut motility and systemic absorption, and reversing the ratio of seaweed to andrographolide extract in the composition for improved effectiveness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If antibiotics are added to fish feed for disease prevention, then disease control effectiveness is improved, but antibiotic resistance emerges and residue problems occur

Engineering Contradiction:

Improvedisease control effectivenessVSAvoidantibiotic resistance and residue

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the chemical composition parameters by replacing antibiotics with a specific ratio of seaweed extract (95%) and andrographolide extract (5%), creating a new feed additive formulation that achieves disease prevention without antibiotic-related harmful effects

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses natural plant extracts (seaweed and andrographolide) as temporary, renewable alternatives to persistent antibiotics, where the feed additive provides short-term immune support that resets each feeding cycle without accumulating resistance

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Object-affected harmful factors

If vaccines are used for disease prevention, then antibiotic resistance is avoided, but cost and labor intensity increase significantly

Engineering Contradiction:

Improveantibiotic resistance avoidanceVSAvoidcost and labor intensity

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The feed additive enables fish to activate their own immune systems through immune stimulation, eliminating the need for external vaccine administration and allowing the aquatic environment to serve the protection function naturally

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The seaweed and andrographolide combination provides multiple functions: immune stimulation, pathogen elimination, and gut health improvement, replacing the specialized function of vaccines with a multi-functional feed additive

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If vaccines are administered to infected fish, then some protection is provided, but intracellular pathogens remain unaffected

Engineering Contradiction:

Improveprotection effectivenessVSAvoideffectiveness against intracellular pathogens

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent introduces andrographolide as an intermediary substance that mediates between the fish's immune system and intracellular pathogens, enabling the immune system to penetrate and eliminate intracellular infections that vaccines cannot reach

Inventive Principle:

Principle #24Intermediary (Mediator)

4Ease of manufacture

If aqueous plant extracts are used as in prior art, then some immune support is provided, but effectiveness is insufficient

Engineering Contradiction:

ImprovemanufacturabilityVSAvoideffectiveness

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent creates a composite feed additive by combining seaweed extract and andrographolide extract in a specific 95:5 ratio, where the two materials work synergistically to produce enhanced immune stimulation effects greater than either component alone

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent optimizes the concentration ratio parameter between seaweed extract and andrographolide extract, determining that a 95:5 ratio provides maximum effectiveness, which was the critical modification from prior art formulations

Inventive Principle:

Principle #35Parameter changes

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

The modified feed additive significantly enhances immune response and pathogen elimination, providing effective protection against intracellular pathogens like Piscirickettsia salmonis and viral infections, with improved absorption and reduced harmful immune reactions.

Implementation Method 1

insoluble, fibrous plant material appears to aid gut motility. This enables a fish infected with gastro-intestinal pathogens to more quickly eliminate pathogens from its gastrointestinal tract

Methodology Applied

Scientific EffectGut motility: Peristalsis

Implementation Method 2

the insoluble, fibrous plant material appears to aid in the systemic absorption, or 'bioavailability,' of andrographolide

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Data Source

PatentEP4717315A2Improved aquaculture feed additive

Publication Date: 2026.04.01 HP INGREDIENTS CORP

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AI summary

A feed additive for use in commercial aquaculture, made from whole dried seaweed powder supplemented with 2.5 percent (w/w) andrographolide, increases feed conversion ratio (the ratio of weight gain to weight of feed used) and growth rate, while reducing vulnerability to water-borne marine pathogens such as Piscirickettsia salmonis and white-spot syndrome virus.