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The aim of this study was to evaluate the effectiveness of ß-glucans and MOS, essential oil (mixture of carvacrol and thymol), and the probiotic based on Saccharomyces boulardi, as an alternative to anticoccidial agents. In this experiment, six hundred seventy-two 1-day-old male broiler chicks were housed in batteries for 28 d. The experimental design of 4 randomized blocks with 24 cages each, and 7 birds per cage, consisted of an initial phase from 1 to 14 d of age, and a growth phase, from 15 to 28 d of age. The rations were formulated based on corn and soybean meal as energy and protein ingredients, respectively. All birds were inoculated with Eimeria spp and C. Perfringes at 14 d of age, and with C. Perfringes only at 21 d of age. The results showed the best weight gain in the initial phase when the anticoccidial agent was applied, whereas the use of additives in growth and entire experimental phases showed superior results in all treatments for this parameter. The birds that did not receive additives in the rations had the worst feed conversion in both phases and along raising. The results showed no significant differences between the treatments for the scores of lesions in the digestive tract and counts in the cecum, however, the red lesions increased numerically in the duodenum and jejunum of birds fed diets without the inclusion of additives. The use of additives indicated effectiveness for the parameters of performance in broilers challenged with C. Perfringes and Eimeria spp. at 14 d of age, and with C. Perfringes at 21 d of age.

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Metabolite profiles of chicken breast extracts and water mobility in breasts were studied using proton nuclear magnetic resonance (1H-NMR) spectroscopy and time-domain NMR (TD-NMR) relaxometry, respectively, using normal breast (NB), and wooden breast (WB) and white striping (WS) myopathies in broilers. One thousand eight hundred sixty broilers were raised to commercial standards, receiving the same diets that were formulated as per the different growth stages. At 49 D of age, 200 animals were slaughtered following routine commercial procedures, and at 4 h postmortem, the whole breast (pectoralis major muscle) was removed and visually inspected by an experienced meat inspector who selected NB (without myopathies) and samples with the presence of WS and WB myopathies. Fifteen breasts (5 each of NB, WS, and WB) were analyzed through TD-NMR relaxometry, and samples of approximately 20 g were taken from each breast and frozen at -80°C for metabolite profiling through 1H-NMR spectroscopy. Multivariate statistical analysis was used to evaluate the effect on water relaxometry and metabolite profile in accordance with the presence and type of myopathy in the breast. 1H-NMR data showed that the metabolite profiles in WS and WB breasts were different from each other and from NB. This pilot study shows that myopathies appear to be related to hypoxia, connective tissue deposition, lower mitochondrial function, and greater oxidative stress compared with NB. The longitudinal and transverse relaxation time of the breasts determined by TD-NMR relaxometry was shorter for NB than that for WS and WB, indicating greater water mobility in breasts affected by myopathies. 1H-NMR spectroscopy can be used to differentiate the metabolism of WS, WB, and NB, and TD-NMR has the potential to be a fast, simple, and noninvasive method to distinguish NB from WB and WS. As a practical application, the metabolomic profile as per the occurrence of breast myopathies may be used for a better understanding of these issues, which opens a gap to mitigate the incidence and severity of WS and WB. In addition, the present study brings an opportunity for the development of a new and objective tool to classify the incidence of breast myopathies through TD-NMR relaxometry.

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Abstract Background: Coccidiosis is the infectious disease with the greatest economic impact in poultry production. Additionally, chemotherapeutic growth promoters are being substituted for safer alternative strategies. Objective: To evaluate the effect of feeding oleoresins from chili pepper (Capsicum annuum) and turmeric (Curcuma longa L.) on the performance, survival rate, and the Productive Efficiency Index of broilers from 1 to 21d challenged by Eimeria sp. Methods: A total of 700 male 1-day-old chicks (Cobb 500) challenged with Eimeria sp, were assigned to a completely randomized design with four treatments: (1) negative control diet, without anticoccidial agent or growth promoters; (2) control diet+0.05% salinomycin; (3) negative control diet+100g/ton; and (4) negative control diet +140g/ton of test product (Curcuma longa L. plus Capsicum annuum oleoresins). Results: Body weight, weight gain, feed conversion and Productive Efficiency Index did not differ between broilers fed anticoccidial chemotherapeutics and oleoresins. In addition, there was no difference in feed intake and survival rate between dietary treatments. Conclusion: Broilers supplemented with chili pepper and turmeric oleoresins from 1 to 21d present similar body weight, weight gain, feed conversion, and Productive Efficiency Index compared to broilers supplemented with chemotherapeutic anticoccidials without affecting feed intake or survival rate.

Resumen Antecedentes: El impacto económico generado por la coccidiosis en el sector avícola es el mayor en relación con otras enfermedades. Adicionalmente, los promotores de crecimiento quimioterapéuticos se han venido reemplazando por estrategias alternativas. Objetivo: Evaluar el efecto de oleorresinas de pimiento (Capsicum annuum) y cúrcuma (Curcuma longa L.) sobre el desempeño zootécnico, tasa de supervivencia y el Índice de Eficiencia Productiva en pollos de engorde de 1 a 21 dias desafiados con Eimeria sp. Métodos: Se utilizaron 700 pollos machos (Cobb500) de 1 día de edad, distribuidos en un diseño completamente al azar con cuatro tratamientos: (1) dieta control negativo sin agentes anticoccidianos ni promotores de crecimiento; (2) dieta control+0,05% de salinomicina; (3) dieta control negativa+100g/ton; y (4) dieta control negativa +140g/ton del producto a evaluar (oleorresina de Curcuma longa L. y Capsicum annuum). Resultados: Se obtuvieron resultados similares repecto a peso corporal, ganancia de peso, conversión alimenticia e Índice de Eficiencia Productiva en los tratamientos que contenían anticoccidiano quimioterapéutico y los que contenian oleorresinas. Además, no se observaron diferencias en el consumo de alimento ni en la tasa de supervivencia entre los tratamientos dietarios. Conclusión: Los pollos de engorde suplementados entre 1 y 21 d con oleorresinas de pimiento y cúrcuma presentan similar peso corporal, ganancia de peso, conversión alimenticia e Índice de Eficiencia Productiva en comparación con los suplementados con anticoccidianos quimioterapéuticos, sin afectar el consumo de alimento ni la viabilidad.

Resumo Antecedentes: O impacto econômico da coccidiose é o maior quando comparado a outras doenças na produção avícola. Além disso, promotores de crescimento quimioterápicos tem sido substituídos por estratégias alternativas. Objetivo: Avaliar o efeito das oleoresinas da pimenta Chilli (Capsicum annuum) e açafrão-da-terra (Curcuma longa L.) no desempenho zootécnico, taxa de sobrevivência e Índice de Eficiência Produtiva de frangos de corte de 1 a 21d desafiados por Eimeria sp Métodos: Foram utilizados 700 pintos de 1d, machos (Cobb500) distribuídos em delineamento inteiramente casualizado, em quatro tratamentos: (1) dieta controle negativo, sem agente anticoccidiano ou promotores de crescimento; (2) dieta controle+0,05% de salinomicina; (3) dieta controle negativa+100g/ton; e (4)+140g/ton de produto teste (oleoresina de Curcuma longa L. mais Capsicum annuum) e desafiados por Eimeria sp. Resultados: Houve resultados similares para peso, ganho de peso, conversão alimentar e Índice de Eficiência Produtiva entre frangos alimentados com dietas contendo anticocidiano quimioterápico e dietas contendo oleoresinas. Além disso, não houve diferença para consumo de ração e a taxa de sobrevivência entre os tratamentos dietéticos. Conclusão: Frangos de corte alimentados com dietas suplementadas com oleorresinas de pimenta chili e açafrão-da-terra apresentaram resultados similares para peso, ganho de peso, conversão alimentar e Índice de Eficiência Produtiva que frangos de corte alimentados com dietas suplementadas com anticoccidianos quimioterápicos de 1 a 21d, sem afetar o consumo de ração e a taxa de sobrevivência dos animais.

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Considering the market availability of new commercial layer strains with distinct characteristics and behaviors, studies to update their nutritional requirements and to evaluate the need to adopt management practices, such as beak trimming, are needed. The objective of the present study was to evaluate the effects of dietary metabolizable energy (ME) levels and beak trimming on the live performance, egg quality, and economics of commercial layers. A total of 640 Novogen White layers were distributed according to a randomized experimental design in a 5 × 2 factorial arrangement (5 ME levels × 2 beak trimming treatments), totaling 10 treatments with 8 replicates of 8 hens each. The evaluated dietary ME levels were 2,600; 2,700; 2,800; 2,900; and 3,000 kcal/kg of feed. Layers were beak-trimmed once (7 days old) or twice (7 and 70 days old). Live performance and egg quality mesuraments and production economics were analyzed. Egg production was positively influenced by dietary ME levels. Feed intake (FI), feed conversion ratio (FCR), egg weight, albumen height, Haugh units, and eggshell strength were positively influenced by increasing dietary ME levels. Hens beak-trimmed once presented higher feed intake and worse FCR than those beak-trimmed twice. Beak trimming did not affect egg production, egg weight, albumen height, Haugh units, and eggshell strength. Production costs increased as dietary ME levels increased. Higher production cost was determined for hens beak-trimmed once than for those beak-trimmed twice. Total revenue was not influenced by the treatments. Gross margin was linearly decreased as dietary ME levels increased and was lower when hens were beak-trimmed once. Increasing dietary ME levels and beak trimming hens once reduce the economic viability of egg production.

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