Aims: To evaluate mannan oligosaccharide (MOS) and threonine effects on performance, small intestine morphology and Salmonella spp. counts in Salmonella Enteritidis-challenged birds. Methods and Results: One-day-old chicks (1d) were distributed into five treatments: nonchallenged animals fed basal diet (RB-0), animals fed basal diet and infected with Salmonella Enteritidis (RB-I), animals fed high level of threonine and infected (HT-I), birds fed basal diet with MOS and infected (MOS-I), birds fed high level of threonine and MOS and infected (HT+MOS-I). Birds were inoculated at 2d with Salmonella Enteritidis, except RB-0 birds. Chicks fed higher dietary threonine and MOS showed performance similar to RB-0 and intestinal morphology recovery at 8 dpi. Salmonella counts and the number of Salmonella-positive animals were lower in HT+MOS-I compared with other challenged groups. Conclusion: Mannan oligosaccharides and threonine act synergistically, resulting in improved intestinal environment and recovery after Salmonella inoculation. Significance and Impact of the Study: Nutritional approaches may be useful to prevent Salmonella infection in the first week and putative carcass contamination at slaughter. This is the first report on the possible synergistic effect of mannan oligosaccharides and threonine, and further studies should be performed including performance, microbiota evaluation, composition of intestinal mucins and immune assessment.

RESUMO. Com o objetivo de avaliar a inclusão de 0%, 10% e 20% farelo de coco na alimentação de frangos de corte utilizou-se 288 pintos, em experimento em blocos casualizados, com três tratamentos, quatro repetições e 24 aves por unidade experimental de um a 42 dias de idade. As rações foram isoenergéticas e isoprotéicas para cada fase (inicial, crescimento e final). As aves alimentadas com farelo de coco não apresentaram diferenças (p>0,05) em desempenho. No período total, os tratamentos que não receberam farelo de coco tenderam a uma pior conversão alimentar. Quanto ao rendimento de carcaça, não houve diferenças significativas, mas as alimentadas com farelo de coco apresentaram maior gordura abdominal que o controle.Palavras-chave: aves, desempenho, farelo de coco, carcaça. ABSTRACT. Effect of different levels of coconut meal in broiler chicken's diets upon the carcass yield.This experiment was carried out with the objective to evaluate different levels of coconut meal in broiler chicken's diets. It was utilized 288 chicks in randomized block design, within the period of 1 to 42 days old, under three treatments, with four replications and 24 birds in each experimental unit. The rations were isoenergetic and isoproteical to each phase. The birds fed with the levels of coconut meal didn't differ (p>0,05) in performance. The treatments that didn't receive the coconut meal tended to maximum feed conversion. Regarding the carcass yield, results showed no difference, although the birds fed with coconut meal tended to accumulate more abdominal fat.

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This work aims to evaluate the application of ultrasound and marinate with extract of acerola (Malpighia emarginata) residue on the tenderness and lipid oxidation of the meat pork. Samples of loin (Longissimus dorsi) containing approximately 90 g, 10 cm long, 5 cm wide, and 2 cm high were extracted from the pig carcass. The samples were coded and randomly allocated under a factorial scheme 2 (with and without antioxidant extract) x 3 (ultrasonic bath times 0, 5, and 10 minutes); each treatment had four replicates. The final extract volume was adjusted with distilled water, ensuring 200 mg of gallic acid equivalents per kilo of meat. Then, the samples were placed in the ultrasonic bath at a fixed frequency of 170 W, 35 kHz. During the ultrasound application, the bath temperature was maintained at 10 °C with ice/ice water addition when necessary. The acerola´s extract showed a significant effect (P < 0.05) on the meat Cohesiveness and to a lesser extent before rupture. With the modification of the microstructure in the meat, there was a decrease in elasticity. The application of ultrasound to meat (170 W, 35 kHz) in times (5 and 10 minutes) combined with the marinating in a natural antioxidant acerolas residue extract improves the meat's quality characteristics, decreasing the hardness and chewiness.

RESUMO -Dois experimentos foram realizados para determinar o valor nutricional do ovo desidratado (OD), o efeito do tempo de jejum pós-eclosão (TJPe) e a inclusão do ovo desidratado em rações para frangos de corte. No primeiro experimento, 120 pintos de corte machos, linhagem Ross-308, foram alojados em delineamento inteiramente casualizado, com três tratamentos e cinco repetições de oito aves. As coletas de excretas foram realizadas no período de 24 a 29 dias de idade, pela manhã e à tarde. No segundo experimento, um lote misto de 810 pintos da linhagem Cobb-500, com peso vivo inicial 33,41 ± 0,53, foi alojado em boxes de 1,0 × 1,5 m. O delineamento experimental utilizado foi o inteiramente casualizado com 9 tratamentos e 6 repetições de 15 aves, em esquema fatorial 3 × 3, com três níveis de ovo desdratado (0, 2 e 4%) e três tempos de jejum pós-eclosão (28, 40 e 52 horas), correpondentes a 0, 12 e 24 horas de jejum pós-alojamento, respectivamente.O ovo desidratado apresentou 51,54% de PB e 4.278 kcal EMAn. Na fase de 1 a 7 dias, o peso vivo, o ganho de peso e o consumo de ração entre as aves submetidas a jejum de 40 e 52 horas foram inferiores aos daquelas alimentadas mais cedo (às 28 horas do tempo de jejum pós-eclosão), enquanto as aves submetidas a 52 horas de jejum pós-eclosão (24 horas de jejum pós alojamento) apresentaram os piores resultados. O nível de 4% de ovo desidratado na ração pré-inicial melhorou o peso vivo no segundo e terceiro dia de idade dos pintinhos. No período de 1 a 21 dias, o ovo desidratado pode ser utlizado na alimentação de frangos, pois não prejudica o desempenho das aves.Palavras-chave: alimento alternativo, desempenho, desenvolvimento inicial, valor nutritivo Effect of post-starvation hatching time, energy levels and addition of dried egg in pre-initial and initial diets for broiler chicksABSTRACT -Two experiments were carried out to determine the nutritional value of the dried egg (DEGG), and the effect of the post-starvation hatching time (PSHT) and the inclusion of dried egg powder in the diet of broiler chicks. In experiment 1, 120 male Ross-308 broiler chicks were housed according to a completely randomized design into three treatments and five repetitions of eight birds each. Excreta collection was daily performed from 24 to 29 days of age in the morning and afternoon. In experiment 2, a sex-mixed batch of 810 Cobb-500 chicks was used. Initial weight was 33.41 ± 0.53 g, and the chicks were housed in pens measuring 1.0 × 1.5 m. A completely randomized experimental design was used with nine treatments and six repetitions of 15 birds each, according to a 3 × 3 factorial of three DEGG levels (0, 2 and 4%) and three PSHT (28, 40 and 52 hours), corresponding to: 0, 12 and 24 hours of starvation after housing, respectively. DEGG showed 51.54% of CP and 4,278 kcal AMEn/kg. From 1 to 7 days of age, the birds submitted to starvation for 40 and 52 hours showed lower live weight, weight gain and feed intake when compared to birds fed sooner (at 28 hours PSHT). The poorest performance wa...