title: Bacillus subtilis strain specificity affects performance improvement in broilers.
abstract: The study reports the effects on broiler performance of a newly isolated Bacillus subtilis strain, which is phylogenetically not closely related to already well-described strains of B. subtilis. In the first experiment, birds were reared in battery cages and exposed to C. perfringens. An increase in growth performance was observed with the strain when compared to the challenged animals. Three additional growth trials were conducted to 35 d of age, in different rearing conditions (genetic breeds, corn-soybean meal-based diet with or without animal proteins, in presence or absence of phytase, on fresh or used litter) to investigate the efficacy and the specificity of this new B. subtilis strain on the improvement of BWG and FCR of broilers in comparison with a B. subtilis-based DFM already used in the field. Whatever the rearing conditions tested, the new B. subtilis strain led to an average 3.2% improvement in feed conversion ratio or bodyweight. Comparatively, the commercial Bacillus strain significantly improved broiler performance in only one trial out of 3 with an average improvement reaching 2%. All these results indicate that this new B. subtilis strain consistently improves broiler performances.
authors.affiliation: Adisseo France SAS, Center of Expertise in Research and Nutrition, 6 Route Noire, Malicorne, 03600, FR.
authors.forename: L
authors.initials: L
authors.lastname: Rhayat
authors.affiliation: Adisseo France SAS, Center of Expertise in Research and Nutrition, 6 Route Noire, Malicorne, 03600, FR.
authors.forename: V
authors.initials: V
authors.lastname: Jacquier
authors.affiliation: Novozymes A/S, Krogshøjvej 36, Bagsvaerd, 2880, DK.
authors.forename: K S
authors.initials: KS
authors.lastname: Brinch
authors.affiliation: Novozymes A/S, Krogshøjvej 36, Bagsvaerd, 2880, DK.
authors.forename: P
authors.initials: P
authors.lastname: Nielsen
authors.affiliation: Novozymes Biologicals Inc, 111 Kessler Mill Rd, Salem, VA 24153, USA.
authors.forename: A
authors.initials: A
authors.lastname: Nelson
authors.affiliation: Adisseo France SAS, Center of Expertise in Research and Nutrition, 6 Route Noire, Malicorne, 03600, FR.
authors.forename: P-A
authors.initials: PA
authors.lastname: Geraert
authors.affiliation: Adisseo France SAS, Center of Expertise in Research and Nutrition, 6 Route Noire, Malicorne, 03600, FR.
authors.forename: E
authors.initials: E
authors.lastname: Devillard
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena / Q000187:drug effects; D000818:Animals; D001412:Bacillus subtilis / Q000737:chemistry* / Q000145:classification; D002645:Chickens / Q000254:growth & development / Q000276:immunology / Q000502:physiology*; D003016:Clostridium perfringens / Q000502:physiology*; D004032:Diet / Q000662:veterinary*; D008297:Male; D019936:Probiotics / Q000008:administration & dosage / Q000494:pharmacology*; D011897:Random Allocation
keywords: Bacillus; broiler; performance; probiotic; specificity