Efeitos do plasma sanguíneo sobre o crescimento, desenvolvimento bacteriano e estrutura intestinais de leitões desmamados aos 28 dias de idade

Abstract

RESUMOVisando-se determinar se o plasma sangüíneo tem efeitos sobre o crescimento, o desenvolvimento bacteriano e a estrutura intestinal de leitões desmamados aos 28 dias de idade consumindo quantidades iguais de dietas, 24 leitões desmamados aos 28 dias de idade foram utilizados em um experimento com delineamento em blocos ao acaso com quatro tratamentos (dietas com 0,0; 2,5; 5,0 e 7,5% de plasma sangüíneo), seis repetições e um animal por unidade experimental. Foram constatadas diferenças significativas entre os tratamentos em relação aos ganhos de peso, às conversões alimentares e às quantidades de colônias de E. coli. Os animais que consumiram as dietas com plasma sangüíneo apresentaram maiores ganhos de peso, melhores conversões alimentares e menores quantidades de E. coli no intestino delgado do que os animais que receberam dietas sem plasma. Não se observou efeitos significativos das quantidades de plasma sangüíneo consumido sobre a estrutura intestinal dos leitões doze dias após o desmame. Concluiu-se que a inclusão de plasma sangüíneo na proporção mínima de 2,5% aumenta ganho de peso, melhora conversão alimentar e reduz a incidência de colônias de E. coli no intestino de leitões desmamados aos 28 dias de idade criados em condições de desafio, mas não afeta a estrutura intestinal.Palavras-chaves: desmame precoce, diarréias, Escherichia coli, idade ao desmame, enriquecimento nutricional SUMMARYIn order to evaluate the effects of spray-dried plasma on performance (weight gain, feed intake, and feed conversion), growth, intestinal health (microflora colonization and intestinal wall morphology) of piglets fed equal amounts per day of feed, 24 piglets weaned at 28 days old were used in an experiment performed as a randomised block design with four treatments (diets with 0.0, 2.5, 5.0 and 7.5% inclusion of spray-dried plasma), six replicates and one animal per experimental unit. Significant differences were observed among treatments weight gain, feed conversion and numbers of E. coli colony forming-units (CFU). Pigletsfed diets with different levels of spray-dried plasma had higher weight gain, better feed conversion and lower amounts of E. coli CFU in the small intestine than animals fed diets without spraydried plasma in the diets. No significant effect of the treatments on the intestinal wall morphology at day twelve after weaning was observed. In conclusion, the inclusion of 2.5% spray-dried plasma in the diets in creases weight gain, improves feed conversion and reduces the incidence of E. coli CFU in the small intestine of piglets weaned at 28 days of age reared under challenging conditions, however, no beneficial effect on the intestinal wall morphology was observed with the inclusion of spray dried plasma in the diets.

Application of spray‐dried blood plasma as a feed additive for the replacement of antibiotics in growing‐finishing swine

“…On the other hand, a swine diet based on feed without antibiotics and with the presence of natural compounds has been widely studied to ensure the health of the swine herd 6,7 . One of these natural alternatives recently reported is blood plasma produced by spray drying, which is a concentrated protein ingredient for feed supplementation 8 . Spray drying is a technology that has been successfully employed in industries to obtain dry materials from a liquid 9 …”

“…6,7 One of these natural alternatives recently reported is blood plasma produced by spray drying, which is a concentrated protein ingredient for feed supplementation. 8 Spray drying is a technology that has been successfully employed in industries to obtain dry materials from a liquid. 9 The use of spray-dried blood plasma (SDP) included in the diet of weaned piglets can improve the animal productivity.…”