**3. Conclusion**

Synbiotic formulations are a potential choice to withdraw antibiotic as growth promoter. The complementary or synergic action of synbiotic improve the poultry production and control infections disease. Further studies should be developed to identify target microorganism's species according to farm management conditions. The hope is that, going forward, the prebiotic, probiotic or synbiotic will have greater representativeness among feed additive, reducing the use of antibiotics and the selective pressure of microorganism. Advances in symbiotic research will promote better understanding of interested parties, enabling better communication with consumers.
