title: Probiotic form effects on growth performance, digestive function, and immune related biomarkers in broilers.
abstract: The aim of this work was to assess the effect of dietary viable or heat inactivated probiotic forms (PF) combined or not with avilamycin (AV) used as a growth promoter, on broiler growth performance, nutrient digestibility, digestive enzyme activities, and expression of immune response related genes.Depending on the type of PF (i.e., no addition, viable, inactivated) and AV addition (no/yes), 450 one-day-old Cobb male broilers were allocated in the following 6 treatments according to a 3 × 2 factorial arrangement with 5 replicates of 15 broilers each for 6 wk: CoN: diet without any addition; CoN+A: combination of CoN with AV; ViP: viable PF - no AV; ViP+A: combination of ViP with AV; InP: inactivated PF - no AV; InP+A: combination of InP with AV.There were no interactions (P > 0.05) for overall performance parameters. In contrast, PF or AV addition improved BW gain (PPF= 0.015; PAV < 0.001), FCR (PPF < 0.001; PAV < 0.001) and production efficiency factor (PPF= 0.001; PAV= 0.001).Significant (PPF×AV ≤ 0.05) interaction effects regarding ileal digestibility (IAD) of DM and total tract apparent digestibility (TTAD) of DM and ether extracts (EE) were noted. In addition, PF affected IAD and TTAD of CP (PPF < 0.001, PPF= 0.004, respectively). Inactivated PF increased (PPR= 0.024) lipase activity in jejunal digesta.At spleen level InP and ViP+A down-regulated TGF-β4 (PPF × AV = 0.035) compared to CoN and ViP, whereas ViP+A up-regulated iNOS (PPF × AV = 0.022). An anti-inflammatory effect of live and inactive PF and/or AV addition at cecal tonsils was shown by iNOS down-regulation (PPF × AV= 0.015) compared to CoN. Furthermore, AV down-regulated IFN-γ (PAV= 0.002).In conclusion, viable probiotic, as well as inactivated probiotic alone or in combination with avilamycin, improved nutrient digestibility. All dietary additives affected growth performance positively and induced an anti-inflammatory response at cecal level.
authors.affiliation: Department of Nutritional Physiology and Feeding, Agricultural University of Athens, Iera Odos 75, 11855, Greece.
authors.forename: I
authors.initials: I
authors.lastname: Palamidi
authors.affiliation: Department of Nutritional Physiology and Feeding, Agricultural University of Athens, Iera Odos 75, 11855, Greece.
authors.forename: K
authors.initials: K
authors.lastname: Fegeros
authors.affiliation: BIOMIN Holding GmbH, Erber Campus 1, 3131 Getzersdorf, Austria.
authors.forename: M
authors.initials: M
authors.lastname: Mohnl
authors.affiliation: BIOMIN Holding GmbH, Erber Campus 1, 3131 Getzersdorf, Austria.
authors.forename: W H A
authors.initials: WHA
authors.lastname: Abdelrahman
authors.affiliation: BIOMIN Research Center, Technopark 1, 3430 Tulln, Austria.
authors.forename: G
authors.initials: G
authors.lastname: Schatzmayr
authors.affiliation: Department of Anatomy and Physiology of Farm Animals, Agricultural University of Athens, Iera Odos 75, 118 55, Athens, Greece.
authors.forename: G
authors.initials: G
authors.lastname: Theodoropoulos
authors.affiliation: Department of Nutritional Physiology and Feeding, Agricultural University of Athens, Iera Odos 75, 11855, Greece. Electronic address: kmountzouris@aua.gr.
authors.forename: K C
authors.initials: KC
authors.lastname: Mountzouris
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena / Q000187:drug effects; D000818:Animals; D030161:Avian Proteins / Q000235:genetics / Q000378:metabolism; D015415:Biomarkers; D002645:Chickens / Q000254:growth & development / Q000276:immunology / Q000502:physiology*; D004032:Diet / Q000662:veterinary*; D004063:Digestion / Q000187:drug effects / Q000276:immunology; D041981:Gastrointestinal Tract / Q000187:drug effects / Q000201:enzymology / Q000276:immunology; D015870:Gene Expression / Q000187:drug effects / Q000276:immunology; D006133:Growth Substances / Q000008:administration & dosage / Q000494:pharmacology*; D006358:Hot Temperature; D007113:Immunity, Innate / Q000187:drug effects / Q000276:immunology; D008297:Male; D009844:Oligosaccharides / Q000494:pharmacology; D019936:Probiotics; D011897:Random Allocation
chemical_list: D030161:Avian Proteins; D015415:Biomarkers; D006133:Growth Substances; D009844:Oligosaccharides; C006653:avilamycin
keywords: broiler; cytokine; digestibility; digestive enzyme; probiotic