부산대학교 도서관

Antibiotic growth promoters and antibiotic resistance are dosed related. The lnceased concern about the potential for antibiotic resistanst strains of bacteria has compelled the researchers to utility of other non therapeutic alternatives like enzymes, prebiotics, preblotfcs, herbs, essential oils, lmmunostlmulants and organic acids as feed additives In animal produdfon. Organic acids are not antibiotics but, If used corretly along with nutritional, managerial and bioseacurty measaures, they Can prove powerful in maintaining the health of the Gl-tract of poultry, thus ImproVing their zoomchnical pafonnances. Due to antimicrobial effect, organic acids result in inhibition of Intestinal bacteria leading to the reduced bacterial competition with the host for available nutrients and diminution in the level of toxic bacterial metaboliteS as a result of lessened baderial fermentation resulting in the improvement of protein and energy digestibility; thereby ameliorate the performance of bird. The increased villus height in the small inteStines incluced by organic acids inaeases the absorptive intestinal surface. facilitates ttle nutrient absorption and growth performance. They decrease the pH value in different segments of gastro-intestinal tract which is conduCive for the growth of favorable bacteria Simultaneously hampering the growth of pathogenic badaia which growth ot relatively higher pH. The acid aniOn has been shown to complex with calCium, phosphorus, magnesium and zinc, which improves the digestibility of these minerals. Reduction in gastric pH follOWing organic acid feeding increases pepsin activity and the peptides arising from pepsin proteolysis trigger ttte release of hormones, including gastrin and cholecystokinin, which regulate digeston and absorption of proteins. [ABSTRACT FROM AUTHOR]