The food poultry origin such as eggs and meat supply high quality and readily
digested protein and energy and are also a compact source of readily-available
micrnutrients. Thus, the economc and nutritional demands of our modern society
for food from poultry necessitate the raising of poultry under intensive
production system in densely-populated colonies or flocks, which resulted in
stress. Under such circumstances, anti-microbail feed additives such as
anitbiotics are often used ot suppress or elminate harmful mcroorganisms in the
intestine and to improve growht ad feed efficiency. However, one major aspect of
food production and safety today is the reduction in teh use of anitbiotics and
other medicinal