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Probiotics and Gut-Associated Lymphoid Tissue (GALT) in Fish: Mechanism, Application and Future Perspectives
Kalim Ullah1, Qaisra Siddique2, Faisal Tasleem2
1Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), College of Fisheries, Southwest University, Chongqing, 402460, China. z.kalim.1991@gmail.com.
Probiotics and Antimicrobial Proteins
|June 19, 2026
Summary
Probiotics enhance fish gut immunity and health by modulating gut microbiota and immune responses. Challenges in application persist, necessitating further research for sustainable aquaculture practices.
Area of Science:
- Immunology
- Microbiology
- Aquaculture
Background:
- Gut-associated lymphoid tissue (GALT) is crucial for fish immunity and environmental interaction.
- Probiotics are increasingly recognized for improving GALT function, gut microbiota, and fish health.
- Existing reviews lack a comprehensive synthesis of probiotic-GALT interactions across multiple domains.
Purpose of the Study:
- To provide a unified analysis of probiotic-GALT interactions in teleost fish.
- To integrate immunological, microbiological, molecular, nutritional, and practical aspects of probiotic use.
- To bridge disciplinary gaps in understanding probiotic efficacy in aquaculture.
Main Methods:
- Comprehensive literature review integrating diverse scientific domains.
- Analysis of evidence on probiotic effects on gut microbiota composition.
- Synthesis of data on immune cell modulation, immunoglobulin production, and growth parameters.
Main Results:
- Probiotics induce beneficial shifts in gut microbial communities.
- Probiotics bolster mucosal immunity by modulating immune cells and immunoglobulins.
- Probiotics contribute to enhanced fish growth and disease resistance.
Conclusions:
- Probiotics show significant potential for improving fish health and aquaculture sustainability.
- Challenges include strain stability, delivery, and host-specific responses for consistent field outcomes.
- Future research should focus on standardized evaluation, advanced formulations, and sustainable strategies.
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