The present study was conducted to investigate whether dietary essential oils could affect growth performance, relative organ weights, cecal microflora, immune responses and blood profiles of broiler chickens fed on diet programs containing different nutrient densities. denseness at 21 days and by diet essential oils at 35 days. Essential oils significantly (p<0.05) increased daily body weight gain and feed conversion ratio during the periods of 22 to 35 and 1 to 35 days, but failed to affect feed intake during the entire experimental period. Daily weight gain at 1 to 21 days and feed intake at 1 to 21 and 1 to 35 days were significantly impaired (p<0.05) by nutrient denseness. There were significant treatment relationships (p<0.05) on relative weights of bursa of Fabricius and abdominal fat contents. Finally, either essential oil or nutrient denseness did not influence the relative percentages of breast and lower leg meats, the population of cecal microflora, blood guidelines and antibody titers against Newcastle disease and infectious bronchitis in broiler chickens. It was concluded that diet essential oils, self-employed to nutrient denseness, failed to activate feed intake, but improved growth overall performance in broiler chickens. in broilers. Livest Sci. 2014;160:82C88.Hernandez F, Madrid J, Garcia V, Orengo J, Megias MD. Influence of two flower components on broilers overall performance, digestibility, and digestive organ size. Poult Sci. 2004;83:169C174. [PubMed]Huyghebaert G, Ducatelle R, Vehicle Immerseel F. An upgrade on alternatives to antimicrobial growth promoters for broilers. Vet J. 2011;187:182C188. [PubMed]Jamroz D, Wiliczkiewicz A, Wertelecki T, Orda J, Skorupinska J. Use of active substances of flower origin in chicken diets based on maize and locally cultivated cereals. Br Poult Sci. 2005;46:485C493. [PubMed]Khattak F, Ronchi A, Castelli P, Sparks N. Effects of natural blend of essential oil on growth performance, blood biochemistry, cecal morphology, and carcass quality of broiler chickens. Poult Sci. 2014;93:132C137. [PMC free article] [PubMed]Lee KW, Everts H, Beynen AC. Essential oils in broiler nourishment. Int J Poult Sci. 2004;3:738C752.Lee SH, Lillehoj HS, Jang SI, Lee KW, Parks MS, Bravo D, Lillehoj EP. Cinnamaldehyde enhances guidelines of immunity and reduces illness against avian coccidiosis. Br J Nutr. 2011;106:862C869. [PubMed]Lee KW, Lillehoj HS, Jang SI, Lee SH. Effects of numerous field coccidiosis control programs on sponsor innate and adaptive immunity in commercial broiler chickens. Korean J Poult Sci. 2012;39:17C25.Lee DW, Shin JH, Park JM, Music JC, Shu HJ, Chang UJ, An BK, Kang CW, Kim JM. Growth overall performance and meat quality of broiler chicks fed germinated and fermented soybeans. Korean J Food Sci Anim Resour. 2010;30:938C945.Leeson S. Long term considerations in poultry nourishment. Poult Sci. 2012;941:1281C1285. [PubMed]Li WB, Guo YL, Chen JL, Wang R, He Y, Su DG. Influence of lighting routine and nutrient denseness in broiler chickens: effect on growth performance, carcass qualities and meat quality. Asian Australas J Anim Sci. 2010;23:1510C1518.Mirshekar R, Dastar B, Shabanpour B, Hassani S. Effect of diet nutrient denseness and vitamin premix withdrawal on overall performance and meat quality of broiler 1351761-44-8 IC50 chickens. J Sci 1351761-44-8 IC50 Food Agric. 2013;93:2979C2985. [PubMed]Mountzouris KC, Paraskevas V, Tsirtsikos P, Palamidi I, Steiner T, Schatzmayr G, Fegeros K. Assessment of a phytogenic feed additive effect on broiler growth performance, nutrient digestibility and caecal microflora composition. Anim Feed Sci Technol. 2011;168:223C231.Muhl A, Liebert F. Growth, nutrient utilization and threonine requirement of growing chicken fed threonine limiting diet programs with commercial blends of phytogenic feed additives. J Poult Sci. 2007;44:297C304.Noh HS, Ingale SL, Lee SH, Kim KH, Kwon IK, Kim Rabbit Polyclonal to LFA3. YH, Chae BJ. Effects of citrus pulp, fish byproduct and fermentation biomass on growth overall performance, nutrient digestibility, and fecal microflora of weanling pigs. J Anim Sci Technol. 2014;56:10. [PMC free article] [PubMed]SAS. SAS Users 1351761-44-8 IC50 Guidebook. Statistics, Version 8. SAS Institute Inc; Cary, NC, USA: 2002. Scheuermann GN, Junior AC, Cyprioano L, Gabbi AM. Phytogenic additive as an alternative to growth promoters in broiler chickens. Cienc Rural. 2009;39:522C527.Yan L, Wang JP, Kim HJ, Meng QW, Ao X, Hong SM, Kim IH. Influence of essential oil supplementation and diet programs with different nutrient densities on growth overall performance, nutrient digestibility, blood characteristics, meat quality and fecal noxious gas content in grower-finisher pigs. Livest Sci. 2010;128:115C122.Zeng ZK, Xu X, Zhang Q, Li P, Zhao P, Li Q, Liu J, Piao X. Effects of essential oil supplementation of a low-energy diet on performance, intestinal morphology and microflora, immune properties and antioxidant activities in weaned pigs. Anim Sci J. 2015a;86:279C285. [PubMed]Zeng Z, Zhang S, Wang H, Piao X. Essential oil and aromatic vegetation as feed additives in nonruminant nourishment: A review. J Anim Sci Biotechnol. 2015b;6:7. [PMC free article] [PubMed]Zhao JP, Chen JL, Zhao GP, Zheng MQ,.