As the pressure to decrease the practice of adding antibiotics to poultry feed increases, producers are looking to natural feed additives that would promote gut integrity, immunity, and performance. One of the most studied alternatives is Mannose Oligosaccharides (MOS) powder-a bioactive carbohydrate derived from yeast cell walls.
With the ability of MOS to improve digestion, control harmful bacteria, and enhance immune defense in poultry, it has become one of the backbones for antibiotic-free feeding programs.
What are Mannose Oligosaccharides (MOS)?
Mannose oligosaccharides are bioactive carbohydrates derived from yeast cell walls, usually from Saccharomyces cerevisiae. Unlike the digestible sugars, MOS cannot be degraded enzymatically in poultry, thus remaining intact in the digestive system.
Instead of providing energy, MOS acts as a biological modulator that:
- Supports beneficial gut microbes
- Blocks pathogenic bacteria
- Strengthens intestinal structure
- Stimulates immune activity
Since MOS is not absorbed by the animal, its main function is the management of the gut environment, where over 70% of poultry immunity begins.
How MOS Works in the Poultry Digestive System
MOS powder exerts its actions through essentially two mechanisms:
1. Pathogen Binding (Competitive Exclusion)
Mannose-sensitive fimbriae help many of the harmful bacteria, including Salmonella and E. coli, attach to intestinal walls. MOS acts like gut binding sites, attracting the pathogens instead; thus, they bind to MOS and are flushed out.
2. Immune Activation
MOS stimulates the gut's immune cells, which increases antibody production and enhances resistance against infection without causing inflammatory stress.
3. Balance of microbiota
MOS allows the growth of beneficial microbes, including Lactobacillus, while inhibiting harmful species.
Key Benefits of MOS Powder for Poultry
1. Improves Gut Health and Digestion
MOS stimulates villi development, leading to:
- Larger absorptive surface area
- Improved nutrient uptake
- Reduced diarrhea
- Improved feed efficiency
2. Reduces Pathogen Load
MOS reduces intestinal colonization by pathogens such as:
- Salmonella
- Clostridium perfringens
- E. coli
Consequently, lower pathogen levels mean better growth and lower mortality.
3. Boosts Immunity
Benefits include:
- Improved antibody response
- Improved vaccine response
- Lower disease incidence
- Stronger natural defences
4. Improves Growth Performance
It is commonly noted among poultry producers that
- Higher average daily gain
- Improved feed conversion ratio
- More uniform flocks
5. Supports Antibiotic-Free Programs
MOS allows poultry operations to reduce:
- Antibiotic dependency
- Chemical growth promoters
- Residues in meat and eggs
Application in Poultry Production
Suitable For:
- Broilers
- Layers
- Breeders
Typical Inclusion Rate:
- Starter: 1–2 kg per ton
- Grower: 0.5–1 kg per ton
- Finisher and Layers: 0.3–0.5 kg per ton
Administration:
MOS is mixed directly into feed or incorporated as part of a functional premix.
Safety and Compatibility
MOS is:
Non-toxic
- Heat stable
- Residue-free
Safe for long-term administration
Compatible with probiotics, enzymes, acids, and phytogenics
How MOS Compares to Antibiotics
| Aspect | MOS | Antibiotics |
|---|---|---|
| Kill bacteria | ❌ | ✅ |
| Blocks pathogens | ✅ | ❌ |
| Enhances immunity | ✅ | ❌ |
| Residues | ❌ | ✅ |
| Resistance risk | ❌ | ✅ |
MOS does not kill the bacteria but prevents attachment and overgrowth, leading to a naturally healthy gut.
MOS in Humid and Tropical Poultry Environments
In tropical parts of the world, like Southeast Asia, heat stress and environmental factors escalate disease risk. MOS helps by:
- Stabilizing gut flora
- Reduced toxins production
- Improving digestion integrity
Supporting immune response during heat stress
HJ AGRIFEED Perspective
At HJ AGRIFEED, we promote MOS as part of our natural poultry health strategy. Our MOS powder is sourced from high-quality yeast cell walls, offering consistent mannose content and performance reliability to farmers and integrators. We provide technical support for the inclusion rates based on farm conditions and production goals.
Conclusion
Mannose oligosaccharides powder is considered a cornerstone in the area of modern poultry nutrition. By protecting intestinal health, preventing pathogenic adhesion, and strengthening immune defense, MOS underpins sustainable and antibiotic-free production.
