This study was carried out to evaluate the effect of supplementation of probiotics (Lactobacillus acidophilus, Enterococcus faecium and Bifidubacterium bifidum) and antibiotics (flavomicina and staquinol) on diets for broilers from 1 to 42 days of age, reared in clean (new litter) and challenged (reused litter) environments. A total of 768 one-day-old male broilers of the Cobb 500 strain were distributed in a completely randomized design in a 2 × 4 factorial arrangement (2 litter types × 4 diets), totaling eight […]

The experiment evaluated the influence of isolated or associated phytogenic additives (PA) and organic acids (OA) on nutrient digestibility, performance and carcass characteristics of broiler chickens. Two experiments were conducted in a completely randomized design with a 2 × 2 + 1 factorial arrangement of treatments (with or without PA × with or without OA + antibiotic performance enhancer and anticoccidial). In the first experiment, two metabolic tests were conducted to determine the metabolizability coefficients of the nutrients of starter […]

The objective of the present study was to evaluate the influence of a probiotic product (composition: Lactobacillus acidophillus (3.5 × 1011 CFU), Streptcoccus faecium (3.5 × 1011 CFU) and Bifidobacterium bifidum (3.5 × 1011 CFU)) on broiler performance. A total of 1200 one-day-old broilers were reared until 42 days of age, and distributed in a completely randomized experimental design with 3 treatments (antibiotic, probiotic and control) with 10 replicates of 40 birds each. Weight gain, feed intake, feed conversion ratio […]

This work was carried out to evaluate the use of Bacillus subtilis probiotic C-3102 (1010cfu/g) in diets with or without growth promoters on the performance of broilers in the period from 1 to 42 days of age. It was used 1,200 Cobb line broilers, distributed in a complete randomized block with five diets: negative controller (without promoters); Bacillus subtilis (30 g/t ration); Bacillus subtilis (50 g/t ration); Bacillus subtilis (30 g/t ration) + colistin (10 ppm); avilamycin (10 ppm) + […]

An efficient digestion and nutrients absorption, coupled with good animal health status, are fundamental needs in the competitive animal protein industry. Poor absorption of nutrients cause economic losses, and are a source of imbalance in the microbial intestinal microflora, opening doors to diarrhea and other intestinal diseases, or even facilitating systemic problems of animal health. These problems become even more critical in the current scenario of increased risk with the progressive restriction of the use of antibiotic growth promoters around […]

The effect of the substitution of an antibiotic by different levels of spent mushroom substrate (SMS) of Agaricus blazei on the performance of broiler chicks from 1 to 42 days old was evaluated. Seven diets were evaluated, six with SMS addiction (0.0, 0.2, 0.4, 0.6, 0.8, and 1.0%) and one with antibiotic (avilamycin 10 ppm). A total of 588 one day old chicks was allotted to a complete randomized design, with six replications per diet (three per sex) and 14 […]