Bacteria Strain Found to Combat Salmonella in Chicks
Researchers identified a gut bacterium that bolsters intestinal integrity and reduces Salmonella colonization.
Updated on Oct. 2, 2026 in Life Sciences
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Scientists have discovered that the bacterium Streptococcus alactolyticus provides colonization resistance against Salmonella in chicks. Dietary supplementation of the bacteria improved intestinal mucosal integrity, offering a potential pathway for controlling infections.
Why it matters
This discovery offers a potential biological method to manage Salmonella populations in poultry, which could improve food safety and reduce reliance on other interventions. It highlights the role of specific gut microbiota in regulating pathogen resistance.
Researchers used transcriptomic and serum metabolomic analyses to confirm that differential gene expression peaked at 6 hours post-infection. A genome-wide association study further pinpointed a relevant locus on chromosome 2.
The players
Streptococcus alactolyticus
This is a specific strain of bacteria identified for its role in enhancing intestinal mucosal integrity and resisting Salmonella colonization.
The details
Supplementation with S. alactolyticus altered energy metabolism pathways, specifically the TCA cycle, while strengthening the intestinal lining. The study successfully used a controlled infection model to correlate higher bacterial abundance with reduced pathogen loads.
Timeline
Differentially expressed genes were identified 6 hours post-Salmonella infection.
The Big Picture
This discovery shifts the paradigm of poultry health management by moving from broad-spectrum treatments to targeted probiotic interventions. It challenges the reliance on legacy antibiotic approaches by proving that specific bacterial strains can effectively regulate gut health at a genetic level.
The identification of S. alactolyticus provides a concrete roadmap for developing new, safer probiotic supplements for the poultry industry. In the future, this could lead to more resilient food supplies and a reduction in salmonellosis transmission to consumers.
The takeaway
This study underscores the importance of gut microbiota composition in defending against foodborne pathogens. Implementing targeted bacterial supplements may offer a sustainable, non-chemical approach to strengthening poultry immunity.
Further reading
For more on the latest developments in biological research, explore our Life Sciences section.
More information
View the complete peer-reviewed research article for full study methodology.
Source note: This article includes information reported by Nature.
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