Effect of Probiotics and Prebiotics on the Gut Health and Feed Efficiency of Broiler Chickens

CHAPTER ONE

1.1 Background to the Study

The poultry industry seeks safe alternatives to antibiotics for growth promotion and disease control due to global restrictions on antibiotic use. Probiotics and prebiotics have emerged as effective natural alternatives that enhance gut health and feed utilization (Patterson & Burkholder, 2003).

Probiotics are live beneficial microorganisms that improve the microbial balance of the gut, while prebiotics are non-digestible feed ingredients that stimulate the growth of beneficial bacteria (Fuller, 1989). When used together, they enhance digestion, nutrient absorption, and immune response in poultry.

Improving gut health is vital for broiler performance because the digestive system influences feed efficiency, growth rate, and resistance to disease. Understanding how probiotics and prebiotics affect these factors can help optimize poultry nutrition and welfare.

1.2 Statement of the Problem

The ban on antibiotic growth promoters has created challenges for poultry farmers in maintaining bird health and productivity. Many farmers lack information on alternative feed additives that can effectively improve gut health and feed efficiency. There is a need to evaluate the combined or separate effects of probiotics and prebiotics on broiler performance.

1.3 Objectives of the Study

The objectives of this study are to:

1. Evaluate the effects of probiotics and prebiotics on broiler growth performance.

2. Assess changes in gut microbial population and morphology.

3. Determine the impact on feed efficiency and overall health.

1.4 Research Questions

1. How do probiotics and prebiotics influence broiler gut health?

2. Do they improve feed efficiency and growth rate?

3. What combination gives the best performance results?

1.5 Significance of the Study

This study will provide insight into natural feed additives that enhance poultry productivity without antibiotics. The findings will support sustainable poultry nutrition practices and safer meat production for consumers.

1.6 Scope and Limitation of the Study

The study will focus on broilers fed diets containing probiotics, prebiotics, or their combinations. Limitations may include microbial analysis complexity and variations in environmental conditions.

1.7 Definition of Terms

• Probiotic: Live microorganisms that provide health benefits when consumed in adequate amounts.

• Prebiotic: A non-digestible ingredient that promotes the growth of beneficial gut bacteria.

• Gut Health: The balance and function of microorganisms within the digestive tract.

References
Fuller, R. (1989) Probiotics in man and animals. Journal of Applied Bacteriology, 66(5), 365–378.
Patterson, J. A. and Burkholder, K. M. (2003) Application of prebiotics and probiotics in poultry production. Poultry Science, 82(4), 627–631.