Effects of a direct-fed yeast culture on enteric microbial populations, fermentation acids, and performance of weanling pigs.

Mathew, A. G.; Chattin, S E; Robbins, Chandan Morris; Golden, David A.

doi:10.2527/1998.7682138x

Cited by 94 publications

(93 citation statements)

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“…Kratzer (1983, 1984) showed that there were no significant differences in weight gains of chickens given diets with or without Lactobacillus cultures. On the contrary, Mathew et al (1998) claimed that weanling pigs fed a yeast culture had better growth performance. The contradictory results might be attributed to the variation of Lactobacillus sp.…”

Section: Discussionmentioning

confidence: 92%

Effects on growth performance, faecal microflora and plasma cholesterol after supplementation of spray-dried metabolite to postweaning rats

Loh¹,

Chong²,

Foo³

et al. 2009

CZECH J ANIM SCI

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ABSTRACT:A study was conducted to study the effects of feeding a spray-dried metabolite (SDM) produced by Lb. plantarum I-UL4 in the diets of postweaning rats on growth performance, faecal pH, Enterobacteriaceae bacterial and lactic acid bacteria (LAB) counts in the faeces and on plasma cholesterol concentrations. A total of 15 female 4-weeks-old Sprague dawley rats were randomly assigned to 3 groups of diets: basal diet (control), 0.25% SDM and 0.5% SDM diets. Daily feed intake, daily growth rate, blood plasma for total cholesterol concentration and faecal Enterobacteriaceae and LAB were measured. The growth rate, total feed intake, feed conversion ratio, and pH were not significantly different (P > 0.05) among all the treatment groups. The faecal Enterobacteriaceae counts in the 0.25% and 0.5% groups were significantly (P < 0.05) lower than in the control group. However, there was no significant difference (P > 0.05) in the LAB counts among all the treatment groups. The plasma cholesterol concentration was significantly reduced (P < 0.05) following the feeding of the metabolite. The control had the highest concentration of cholesterol. However, the 0.5% SDM group had the lowest plasma cholesterol concentration, followed by the 0.25% SDM group.

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Section: Discussionmentioning

confidence: 92%

Effects on growth performance, faecal microflora and plasma cholesterol after supplementation of spray-dried metabolite to postweaning rats

Loh¹,

Chong²,

Foo³

et al. 2009

CZECH J ANIM SCI

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“…These actions can result in cellular death (26). Several studies have shown that effects on the reduction in Enterobacteriaceae, coliforms, and E. coli numbers were related to VFA concentrations, but correlations were not determined (6,13,15,16,28). In this study, a correlation with Salmonella spp.…”

Section: Discussionmentioning

confidence: 99%

Effect of Fermented Feed on the Microbial Population of the Gastrointestinal Tracts of Pigs

Winsen¹,

Urlings²,

Lipman³

et al. 2001

Appl Environ Microbiol

174

153

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An in vivo experiment was performed with pigs to study the inhibitory effect of fermented feed on the bacterial population of the gastrointestinal tract. Results demonstrated a significant positive correlation between pH and lactobacilli in the stomach contents of pigs in dry feed as well as in the stomach contents of pigs fed fermented feed. Furthermore, a significant positive correlation between the pH and the numbers of bacteria in the family Enterobacteriaceae in the contents of the stomach of pigs fed dry feed was found. In the stomach contents of pigs fed fermented feed, a significant negative correlation was found between the concentration of the undissociated form of lactic acid and the numbers of Enterobacteriaceae. The numbers of Enterobacteriaceae in the contents of the stomach, ileum, cecum, colon, and rectum of pigs fed fermented feed were significantly lower compared with the contents of the stomach, ileum, caecum, colon, and rectum of pigs fed dry feed. The numbers of total lactobacilli were significantly higher in the stomach contents of pigs fed fermented feed and in the ileum contents of one pig group fed fermented feed compared with the contents of pigs fed dry feed. However, the influence of lactobacilli on numbers of Enterobacteriaceae could not be demonstrated. It was concluded that fermented feed influences the bacterial ecology of the gastrointestinal tract and reduces the levels of Enterobacteriaceae in the different parts of the gastrointestinal tract.Nowadays, there is growing attention on fermented pig feed because it might improve growth performance (8) Fermented feed contains high concentrations of lactic acid, several volatile fatty acids (VFA; acetic acid, butyric acid, and propionic acid), and large numbers of lactobacilli and has a low pH. These four parameters can have, alone or combined, an effect on bacterial ecology of the GIT; lactic acid and VFA are also produced by the indigenous microflora in the GIT (3). Lactic acid and VFA are believed to play a role in reducing the numbers of Enterobacteriaceae, including Salmonella spp. (23,35). Only the undissociated form of lactic acid and VFA can have a bactericidal or bacteriostatic effect (26). The exact concentrations of these undissociated acids and the possible effect on bacterial groups in the content of the stomach and other sites of intestinal tract in pigs fed fermented feed are not known. Fermented feed may reduce the pH in the entire GIT (5, 13, 24), thereby enhancing the effect of VFA on Enterobacteriaceae and probably on Salmonella spp.Another hypothesis for Salmonella reduction is that lactobacilli ingested with fermented feed compete with (potential) pathogenic bacteria in the GIT by strengthening colonization resistance (21). However, the effect of feed-associated lactobacilli on GIT bacterial ecology remains unknown. Very little research has been performed in tracking feed-associated lactobacilli in the GIT of the pig and their possible influence on the bacterial ecology of the GIT. Another mechanism proposed to ...

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“…: +48 81 445 67 46 ted on various animal species (mainly cattle and pigs) indicate that the use of this species of yeast has multifaceted benefits, due in part to its chemical composition and biochemical functions (Wójcik et al 2008,According to Davis et al (2004) and Wójcik et al (2008), an immune activation effect can be attributed to Saccharomyces cerevisiae, while according to Mourfo et al (2005) it has an inhibitory effect on the replication of pathogenic bacteria and their toxins. SC yeast also stimulate replication of the saprophytic microflora of the digestive tract, which has been demonstrated in studies by Mathew et al (1998) and Baurhoo et al (2009).…”

Section: Introductionmentioning

confidence: 99%

The effect of yeast Yarrowia lipolytica on the antioxidant indices and macro-and microelements in blood plasma of turkey hens

Merska¹,

Czech²,

Ognik³

2015

Polish Journal of Veterinary Sciences

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The aim of the study was to assess the effect of different amounts of Yarrowia lipolytica yeast on the redox response and content of macro-and microelements in the blood plasma of turkey hens. The experiment was carried out on 240 turkey hens aged from 1 to 16 weeks. The birds were randomly assigned to 3 experimental groups of 80 birds each. Group I served as a control (K) and did not receive any experimental compounds. The turkey hens from the experimental groups (YL3 and YL6) were administered dried Yarrowia lipolytica yeast in their feed mixtures in the amount of 3% (YL3) or 6% (YL6).Yarrowia lipolytica yeast in the feed mixtures for the turkey hens did not induce oxidation reactions in the organism of the birds. However, an increase in catalase activity and a reduction in the level of LOOH , MDA and vitamin C were observed in the blood plasma of the turkey hens whose diet was supplemented with YL yeast. In the case of other indices, such as superoxide dismutase activity and total antioxidant potential (FRAP), the additive caused no significant changes. Administering Yarrowia lipolytica yeast to turkey hens may stimulate the enzymatic response of the antioxidant system (e.g. increasing catalase activity), mainly by increasing the concentration of iron in the plasma.

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Effects of a direct-fed yeast culture on enteric microbial populations, fermentation acids, and performance of weanling pigs.

Cited by 94 publications

References 0 publications

Effects on growth performance, faecal microflora and plasma cholesterol after supplementation of spray-dried metabolite to postweaning rats

Effects on growth performance, faecal microflora and plasma cholesterol after supplementation of spray-dried metabolite to postweaning rats

Effect of Fermented Feed on the Microbial Population of the Gastrointestinal Tracts of Pigs

The effect of yeast Yarrowia lipolytica on the antioxidant indices and macro-and microelements in blood plasma of turkey hens

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