oaioai:doaj.org/article:67656fae7d6a4a9cb5f532662abf621a

Microbiota of the cecum, ileum morphometry, pH of the crop and performance of broiler chickens supplemented with probiotics Microbiota cecal, morfometria do íleo, pH do inglúvio e desempenho zootécnico de frangos de corte sob suplementação com probióticos

Abstract

It was studied, in this work, the effects of supplementation of probiotics on the performance, on the pH of crop content, on the morphometry of the ileum and on the number of enterobacteria in the cecum of the broilers. Out of the 120 studied birds, 60 belonged to the test group and 60 to the control group. At 1, 7, 12, 18, 23 and 28 days of age, the chickens and rations were weighed and mortality and morbidity were determined. Then, the birds were sacrificed and the pH of the crop content was measured, ileum fragments were collected for morphometric analysis and the enterobacteria in the cecal content were quantified. The mean pH was lower in the group that was given probiotics at 1, 7 and 18 days of age. There were no differences on ration consumption, weight, mortality and morbidity rates. The counts of enterobacteria were lower in the supplemented animals at the ages of 7, 18 and 28 days. The measure of villus of the ileum was higher for the group treated with probiotics at all ages, except for 1 day of age in comparison to the control group. This work proves that supplementation with probiotics reduces the pH of the crop content at the ages of 1, 7 and 18 days and it can contribute to the reduction of pathogenic bacteria on the first days of life by reducing the quantity of enterobacteria in the cecum. In addition, probiotics increase the height of villi in the ileum of the birds.Neste trabalho foram estudados os efeitos da suplementação de probióticos sobre o desempenho, o pH do conteúdo do papo, a morfometria do íleo e o número de enterobactérias no ceco de frangos de corte. Das 120 aves estudadas, 60 eram pertencentes ao grupo teste e 60 ao grupo controle. Nas idades de 1, 7, 12, 18, 23 e 28 dias, os frangos e a ração foram pesados e a mortalidade e morbidade foram determinadas. As aves foram, então sacrificadas, o pH do papo foi medido, os fragmentos do íleo foram coletados para análise da morfometria e as enterobactérias do ceco foram quantificadas. A média do pH foi menor no grupo que recebeu probióticos nas idades de 1, 7 e 18 dias. Não houve diferença no consumo de ração, no peso das aves, e nas taxas de mortalidade e morbidade. A contagem de enterobactérias foi menor nos animais sob suplementação com probióticos nas idades de 7, 18 e 28 dias. A medida das vilosidades do íleo foi maior no grupo tratado com probióticos em todas as idades, à exceção de 1 dia em relação ao grupo controle. Este trabalho comprova que a suplementação com probióticos diminui o pH do conteúdo do papo nas idades de 1, 7 e 18 dias, e pode contribuir na redução de bactérias patogênicas nos primeiros dias de vida, diminuindo a quantidade de enterobactérias no ceco. Além disso, os probióticos aumentaram a altura dos vilos do íleo das aves

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oaioai:doaj.org/article:67656fae7d6a4a9cb5f532662abf621aLast time updated on 12/18/2014

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