Priscila Furtado Campos

Efeitos de plasma sanguíneo sobre vilosidades, desenvolvimento bacteriano e desempenho de leitões criados em condições de desafio pós-desmame aos 35 dias

With the objective to determine the effects of spray-dried plasma on intestinal villi and bacterial growth in the small intestine, as well as on performance of piglets weaned at 35 days old, 24 piglets were randomly assigned in an experimental block design with four treatments (0.0; 2.5; 5.0, and 7.5% spray dried plasma), six replicates and one piglet per experimental unit. Differences were observed among treatments with respect to weight gain, feed conversion, E. coli colony-forming units, and villus height. Pigs fed diets containing spray dried plasma gained more weight and had less E. coli in the small intestine than piglets fed the control diet. The piglets fed the diets containing 5.0 or 7.5% plasma showed better feed conversion compared to those receiving the control diet. Piglets fed the diets containing 2.5; 5.0 or 7.5% plasma received 45.0; 75.0, and 70.0% lesser doses of antibiotics compared to piglets in the control treatment. The levels of 2.5% and 7.5% plasma in the diet resulted in increases in villus height in the duodenum and jejunum. The inclusion of spray-dried plasma in diets for health challenged piglets weaned at 35 days of age has a direct effect on the formation of E. coli colony-forming units and villus height in the small intestine and improves weight gain and feed conversion.

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

In 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 spray-dried 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.