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Abstract 9. INTRODUCTION Nowadays, the use of some antibiotics as growth promoter creates a huge problem for environmental condition and health of consumers. Therefore, nutritionists are trying to substitute those with different natural feed additive, such as organic acids. Organic acids have been used for decades in feed preservation, either for protecting feed from microbial and fungal destruction or to increase the preservation effect of fermented feed. Organic acids are not antibiotics but, if used correctly along with nutritional, managerial and biosecurity measures, they can be a powerful tool in maintaining the health of the gastro intestinal tract of poultry, thus it is improving their performances. If it applied correctly, organic acids work in poultry, not only as a growth promoter but also as a meaningful tool of controlling all bacteria, both pathogenic and non-pathogenic (Wolfenden et al., 0227). There is an increasing trend in using organic acid and their mixtures, as alternatives to antibiotic growth promoters due to their inhibiting activity on the growth |