1. Introduction
Antibacterial feed additives have been used in the poultry
industry for many years to improve the productivity in terms
of weight gain and feed conversion ratio by helping to control
infections in the gut mucosa. However, antibacterial additives
were banned throughout the world from being used in animal
and poultry feeds since resistance to these antibacterial agents
was recorded with most of them (Wegener et al., 1998; Shea,
2003). Antimicrobial agents of plant origin such as essential
oils, plants extracts and complete plant substances, have gathered
significant consciousness as alternatives to the traditional
antibacterial feed additives. On the other hand, feed antibiotics,
which have been used for promoting growth in farm animals
were shown to negatively affect profitability of the
1. IntroductionAntibacterial feed additives have been used in the poultryindustry for many years to improve the productivity in termsof weight gain and feed conversion ratio by helping to controlinfections in the gut mucosa. However, antibacterial additiveswere banned throughout the world from being used in animaland poultry feeds since resistance to these antibacterial agentswas recorded with most of them (Wegener et al., 1998; Shea,2003). Antimicrobial agents of plant origin such as essentialoils, plants extracts and complete plant substances, have gatheredsignificant consciousness as alternatives to the traditionalantibacterial feed additives. On the other hand, feed antibiotics,which have been used for promoting growth in farm animalswere shown to negatively affect profitability of the
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