Yeast extract with blood plasma in diets for piglets from 21 to 35 days of age

Abstract

-The objective of this study was to evaluate the inclusion of yeast extract as a partial replacemer of blood plasma in piglet diets and its effect on the performance and intestinal morphometry of pigs weaned at 21 days of age. One hundred and twenty animals were randomized into blocks, with five diets (4.0% blood plasma; 2.0% blood plasma with 0.0; 1.0; 2.0 or 3.0% yeast extract), six replicates and four pigs per experimental unit. At 35 days of age, one pig per experimental unit was slaughtered in order to evaluate duodenal and jejunal morphometry. The levels of yeast extract had a quadratic impact on daily feed intake and final weight, which increased up to the estimated level of 1.91%. Daily weight gain and feed conversion rate were not affected. A comparison between diets containing different levels of yeast extract and the basal diet showed that the diets containing 2.0% and 1.0% yeast extract provided the highest final weight and the worst feed conversion rate, respectively. Duodenal villus height and crypt depth were quadratically affected by yeast extract levels and the best results were achieved with the estimated levels of 1.64 and 1.16%, respectively. The levels of yeast extract provided a linear increase in the duodenal villus:crypt ratio, but did not change the morphometric variables of the jejunum. No difference was found in the morphometric variables of the duodenum and jejunum when diets containing different levels of yeast extract were compared with the basal diet. The results suggest that the inclusion of 1.91% yeast extract allows for a partial replacement for plasma in the diet, decreasing plasma inclusion from 4.0 to 2.0%.

The effect of a feed additive supplemented with porcine plasma protein on growth performance and selected biochemical indices of nursing piglets

“…On the other hand, several studies doubt that (Carlson and Veum 2000;Rigueira et al 2013). The lack of consistent results among different papers may be related to factors such as environmental stress, immune challenge levels, and the complexity of the diets used in these studies (Pereira et al 2012). The higher weight gain of animals supplemented with blood plasma may be affected by factors such as the age at weaning.…”

Effects of Yeast-Derived ProteinvsSpray-Dried Porcine Plasma Supplementation on Growth Performance, Metabolism and Immune Response of Weanling Piglets

“…There is possibility that some elements with poor flavour or tastes may restrict the feed intake of weaning piglets. Supportively, Pereira et al (2012) indicated that the inclusion of YP can only partial replace blood plasma in piglet diets without compromising body weight gain and FCR. Moreover, Reisinger et al (2012) showed that the lower (0.1%) concentration of the yeast derivatives had a positive influence on the performance parameters of the broiler compared to those fed 0.2% yeast derivatives.…”

“…Yeastderived protein (YP), as a yeast content separated from yeast cells, has been proposed to be a superior protein ingredient to substitute SDPP for weaning piglets (Chae et al, 2001). Yeast-derived protein generally contains amino acids and nucleotides, which have been demonstrated to possess immunoregulatory and antimicrobial capabilities (De los Santos et al, 2007;Pereira et al, 2012). Previous studies demonstrated that YP had similar effects as SDPP in increasing feed intake and body weight (BW) gain of weaning piglets (Carlson et al, 2005;Moehn et al, 2010), which nutritionally was associated with their similar digestibility of nutrients (Mateo and Stein, 2007).…”

Inclusion of yeast-derived protein in weanling diet improves growth performance, intestinal health, and anti-oxidative capability of piglets

“…Yeast-derived protein (YP), enriched with free amino acids, short chain peptides, nucleotides, and inositol (Pereira et al 2012) has been proposed to be a superior protein ingredient as an alternative to SDPP for weaning pigs. As a mixture of yeast cell contents by removing the cell wall from yeast cells (Chae et al 2001), YP possesses similar apparent (AID) and standardized (SID) ileal digestibility of amino acids with SDPP for weanling piglets (Mateo and Stein 2007;Moehn et al 2010).…”