The aim was to evaluate the use of mixture of microencapsulated carvacrol and cinnamaldehyde as a replacement for growth-promoting antibiotics in broiler diets on performance, intestinal quality, organ development, carcass yields and cuts, and meat quality. In the trial were used 600 male chicks, allocated in a completely randomized design, with fi ve treatments and eight replicates of 15 birds, reared up to 41 days of age. The treatments were: Negative Control (NC), Positive Control (PC) 30 mg/kg of virginiamycin, NC+100 mg/kg of essential oils, NC+200 mg/kg of essential oils and NC+400 mg/kg of essential oils. Essential oils were composed by a micro-encapsulated blend, with of 60% cinnamaldehyde, 30% carvacrol and 10% carrier. Birds received essential oils achieved performance equivalent to those birds received PC diets, having better development than NC broilers. No differences were found on relative organ weight, intestinal mucosa and meat quality parameters, however, higher villus:cript ratio was found in PC, NC+200 and NC+400 groups. Meat crude protein and yellowness were infl uenced by inclusion of carvacrol and cinnamaldehyde. It was concluded microencapsulated carvacrol and cinnamaldehyde can replace growth-promoting antibiotic in broiler diets, ensuring performance, intestinal integrity and broiler meat quality.

The purpose of this study was to evaluate infrared beak trimming versus hot-blade beak trimming on performance, organ and bone development of laying pullets, using 240 birds, at 0-16 weeks of age, from two strains (white layer - Hy-Line W36 and brown layer - Hy-Line Brown). Infrared debeaking was performed on the first day of life in the hatchery, whereas hot-blade beak trimming was performed at eight days of age. Zootechnical performance at 6, 9, 12 and 15 weeks of age was analyzed. At the end of the trial, one Bird per experimental unit was euthanized for liver, gizzard, proventriculus, heart and small intestine relative weight evaluation. Both tibiotarsus were collected to measure bone breaking resistance, bone mineral content and bone densitometry. There was higher body weight and feed intake in both bird strains submitted to infrared beak trimming. Additionally, hot-blade white layers presented lower body development and feed intake. The debeaking methods did not influence relative organ weights or tibiotarsus parameters evaluated. We conclude that the infrared beak trimming method promotes better pullet body development than the conventional hot-blade method, improving feed intake, without compromising organ and bone development, being a more adequate debeaking method to be used in layer production.

The objective of this study was to evaluate the effects of different levels of microencapsulated carvacrol and cinnamaldehyde on metabolizable energy, feed digestibility, intestinal morphometric analysis, and antioxidant parameters in broilers. A completely randomized design with five treatments and eight replications of eight broilers (Cobb male) was used, and collections were carried out at 20 and 42 days of age. Carvacrol and cinnamaldehyde concentrations (mg/kg) were: 0 (control), 50, 100, 150, and 200. Carvacrol and cinnamaldehyde improved apparent metabolizable energy but did not change protein and ether extract digestibility. Supplementation increased intestinal villus height and villi:crypt ratio; in which 100 mg/kg produced the greatest villus height. Serum uric acid levels were lower in birds receiving supplementation. Improvement in the activity of glutathione peroxidase and glutathione-S-transferase was observed, while lower uric acid, thiobarbituric acid reactive substances, and reactive oxygen species levels were observed. Microencapsulated carvacrol and cinnamaldehyde improve apparent metabolizable energy and can be administered in broiler feed without risk to the bird's health. These supplements may serve as alternative products to aid the performance of commercial poultry.

O óleo de eucalipto possui funções antibacterianas, antisséptica, expectorante, e melhoradora de saúde respiratória. Entretanto, estimulam a atividade imune e resposta vacinal, junto aos efeitos antioxidantes destas moléculas, vem sendo alvo de estudos recentes na avicultura, pelo seu potencial. Com isso, objetivou-se avaliar o efeito do óleo de eucalipto sobre a titulação de anticorpos específicos contra Bronquite Infecciosa e sobre parâmetros antioxidantes séricos em frangos de corte (Cobb), do 1º até 42º dias de vida dos animais. A pesquisa foi conduzida nas instalações do setor de avicultura da UNOESC Xanxerê, utilizando 80 frangos de corte machos, da linhagem Cobb. Distribuídos no primeiro dia de idade, em delineamento experimental inteiramente casualizado, compostos por quatro tratamentos: Controle, 300 ppm óleo de eucalipto via água de bebida, 300 ppm óleo de eucalipto via nebulização e 300 ppm óleo de eucalipto via água de bebida + 300 ppm de óleo de eucalipto via nebulização, constituídos por 20 repetições, cada ave foi considerada uma unidade experimental. A adição do óleo de eucalipto aumentou a quantidade de anticorpos totais aos 28 dias de idade, no entanto, não propiciou alterações (P>0,05) sobre a titulação 42 dias de idade. Da mesma forma, a capacidade total antioxidante e capacidade de redução do ferro plasmático não sofreram influência (P>0,05) de acordo com as diferentes adições de óleo de eucalipto nas aves. Conclui-se que óleo de eucalipto, adicionado via água de bebida ou via nebulização, não altera a resposta vacinal contra a Bronquite Infecciosa, bem como não exerce efeito antioxidante no organismo.

Palavras chave adicionaisÁcidos orgânicos. Antibióticos Leitões. Polifenóis. Promotor de crescimento.resUMo Objetivou-se avaliar o efeito da adição de um complexo contendo extratos herbais de Acacia minearnsii e Castanea sativa, associados a um blend de ácidos orgânicos contendo os ácidos butírico, cítrico, fumárico e ascórbico em substituição a antibióticos em dietas de leitões na fase de 7 a 10kg de peso corporal. O experimento foi executado nas instalações de uma granja comercial, situada no município de Xanxerê, Santa Catarina, Brasil. Foram utilizados 400 animais, na faixa de 7 a 10kg de peso, distribuídos em delineamento inteiramente ao acaso em quatro tratamentos com quatro repetições cada, compostas por 25 animais cada. Os tratamentos experimentais foram: T1: Controle Positivo (Colistina + Florfenicol) (1000ppm); T2: Complexo herbal + Butirato (300ppm); T3: Complexo herbal + Butirato (600ppm); T4: Complexo herbal + Butirato (1200ppm). Foram avaliados parâmetros sanguíneos (hemograma, leucograma, contagem plaquetária, glicemia e colesterolemia), parâmetros de desempenho (ganho de peso, consumo de ração e conversão alimentar) e ocorrência de diarreias. Os dados experimentais foram submetidos à análise de variância, e na presença de diferença significativa, as médias foram submetidas ao teste SNK a 5% de significância. Não foram constatadas alterações significativas sobre os parâmetros hematológicos ou leucocitários dos suínos avaliados. Não houve alteração na contagem plaquetária, nos níveis de glicose e de colesterol sanguíneos .O desempenho e a ocorrência de diarreias não foram afetadas pelos níveis do blend de extratos herbais e ácidos orgânicos em substituição aos antibióticos. Conclui-se que estes compostos podem ser utilizados como promotor de crescimento em substituição aos antibióticos, sem causar comprometimento nos parâmetros sanguíneos e no desempenho de leitões na fase pós-desmama.inforMation Cronología del artículo. Recibido/Use of herbal extracts and sodium butyrate in swine in the 7 to 10 kg stage sUMMarY The objective was to evaluate the effect of the addition of a complex containing herbal extracts of Acacia minearnsii and Castanea sativa, associated with a blend of organic acids containing butyric, citric, fumaric and ascorbic acids in diets of piglets in the stage of 7 to 10 kg of body weight. The experiment was carried out on the premises of a commercial farm located in the municipality of Xanxerê / SC. A total of 400 animals, 7 to 10 kg in weight, were distributed in a completely randomized design in four treatments with four replicates each, composed of 25 animals each. The experimental treatments were: T1: Positive Control (Colistin + Florfenicol) (1000ppm); T2: Herbal complex + butyrate (300 ppm); T3: Herbal complex + butyrate (600 ppm); T4: Herbal complex + Butyrate (1200ppm). Blood parameters (blood count, leukogram, platelet count, blood glucose and cholesterolemia), performance parameters (weight gain, feed intake and feed conversion) and diarrhea were evaluated. The experimental...