Most Emerging Countries Rely Heavily on Revenue from the Poultry Industry.There's a Long
History of Using Antibiotics to Encourage Growth. They Help Birds Develop a Stronger Immune System And
Fight Off Sickness, and They Also Boost Growth. Immunocompetence Is Defined As the Capacity of An
Organism to Mount a Proper Immunological Response In Reaction to Antigen Exposure. Since the 1940S,
They Have Been Widely Implemented As Feed Additives In the Industry of Animal Agriculture. It Has Been
Hypothesised That This Impact Arises from a Complex Biological Relationship With Intestinal Microflora.
The Use of Antibiotics As Supplements In Animals For the Purpose of Disease Prevention And, In Some
Instances, Efficiency Improvement, Was Legalised By the Food and Drug Administration In the Us In 1951.
Yet, Antibiotic Use Can Lead to Drug-Resistant Microorganisms. As a Result, Antibiotic Use Has Been
Reduced In Favor of Nutritional Supplements Like Probiotics, Which Have Been Shown to Have Beneficial
Effects on Growth and the Immune System.This Review Paper Compares the Use of Probiotics In Chickens
Feed to the Use of Antibiotics, Explains How Probiotics Work, and the Cost-Effectiveness of Include Them
In Poultry Nutrition.