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Week 43: 

Chickens Have a Previously Undescribed Type of Immune Cell

A new peer-reviewed study, published on 19 October 2026 in the European Journal of Immunology, identified and characterised a previously undescribed population of NKT-like T cells in chickens. The researchers studied chicken immune cells under laboratory conditions, examining how they respond to lipid-based signals and inflammatory danger signals. 

 
Researchers discovered that chickens have a type of T cell that can recognise a naturally occurring fat-related substance in the body and respond to it through the immune system’s signalling pathways. These cells appear to play two roles: helping coordinate the immune response by releasing signalling molecules and directly attacking infected or damaged cells. This is the first time this type of lipid-reactive, NKT-like immune cell population has been clearly described in birds.

Strength of evidence

The evidence is strong for the basic finding that this cell population and signalling pathway exist in chickens. However, evidence for practical outcomes, such as more effective vaccines, reduced disease rates or lower antibiotic use, remains limited. The researchers present the findings as a potential foundation for future vaccine development, not as an established treatment or a proven vaccine technology. 

The study primarily shows what immune cells can do under controlled laboratory conditions. It does not demonstrate that a GM3-based vaccine component already works in live chickens, provides better protection against diseases such as salmonellosis or avian influenza, or produces the same effects across different breeds and age groups. The research also focuses on chickens, so the findings cannot automatically be assumed to apply in the same way to ducks or geese

What does this mean for backyard poultry keepers?

The findings do not currently justify any changes to flock management, feeding or vaccination. However, they add to our understanding of how the avian immune system works and could help inform future vaccine strategies. Further research is needed to establish whether this discovery can be translated into practical benefits and improved disease protection in live birds.