Evaluation of several potential bioactive agents for reducing protozoal activity in vitro

Hristov, A.N.; Ivan, M.; Neill, L; McAllister, Tim A.

doi:10.1016/s0377-8401(03)00060-9

Cited by 79 publications

(52 citation statements)

References 45 publications

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“…Furthermore, the inhibition of methanogenesis by saponins from Sapindus saponaria was more effective in defaunated animals (29%), than in the animals with naturally numerous rumen microflora (14%) (Hess et al, 2003a). Thus it was proved that a decrease in methane production is not a result of a limitation on protozoan number only, which was confirmed in other research both in the in vitro and in vivo conditions (Hristov et al, 2003;Baah et al, 2007;Benchaar et al, 2008). A probable reason for the observed differences may be: 1. a degree of bacterial cell degradation (Newbold et al, 1997), 2. saliva production disorder (Teferedegne, 2000), and 3. the possibility of saponin deactivation by animal saliva amylase (Odenyo et al, 1997).…”

Section: The Effect Of Saponins On the Process Of Methanogenesis In Tsupporting

confidence: 65%

Potential of phytofactors to mitigate rumen ammonia and methane production

Szumacher-Strabel¹,

Cieślak²

2010

J. Anim. Feed Sci.

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The increase in the intensity of ruminant production determines changes in the rumen feed conversion and thus, among other, may increase pool of greenhouse gases emission. The ineffective digestion process and changes in the legislation processes implicate the action tends towards the limitation of rumen ammonia and methane production. In the last few years there is an increasing interest of nutritionists in bioactive plant factors -phytofactors as natural feed additives that can modify the rumen fermentation processes, improve the protein metabolism and, at the same time, reduce ammonia production and emission, and curb methane production and emission to the atmosphere. High diversity of bioactive phytofactors contained in many plant species has been identified as a potential factor affecting the above-mentioned processes.

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Section: The Effect Of Saponins On the Process Of Methanogenesis In Tsupporting

confidence: 65%

Potential of phytofactors to mitigate rumen ammonia and methane production

Szumacher-Strabel¹,

Cieślak²

2010

J. Anim. Feed Sci.

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“…Although the toxicity of saponins towards protozoa seems to be widespread and non-specific (Valdez et al, 1986;Diaz et al, 1993;Hristov et al, 2003), some authors found no effect on protozoal number (Sliwinski et al, 2002;Hristov et al, 2003), or even observed an increase (Abreu et al, 2004;Eryavuz and Dehority, 2004). This may be due to the capacity of some rumen bacteria to hydrolyse saponins into free glycosyl and sapogenin fractions (Newbold et al, 1997), thus removing their toxicity against protozoa.…”

Section: Saponinsmentioning

confidence: 99%

Use of ‘natural’ products as alternatives to antibiotic feed additives in ruminant production

Jouany

Morgavi

2007

Animal

250

162

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The banning in 2006 of the use of antibiotics as animal growth promoters in the European Union has increased demand from producers for alternative feed additives that can be used to improve animal production. This review gives an overview of the most common non-antibiotic feed additives already being used or that could potentially be used in ruminant nutrition. Probiotics, dicarboxylic acids, enzymes and plant-derived products including saponins, tannins and essential oils are presented. The known modes of action and effects of these additives on feed digestion and more especially on rumen fermentations are described. Their utility and limitations in field conditions for modern ruminant production systems and their compliance with the current legislation are also discussed.

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“…In investigations conducted by Benchaar et al (2008) no negative effect was found of 60 g YSE (containing 10% saponin) per cow a day on the total numbers and the distribution by genera of ruminal ciliate protozoa. Similarly, other authors did not show any such effect (Hristov et al, 2003;Bahh et al, 2007). The observed differences may have been caused by the amount of applied saponins (Hristov et al, 2004).…”

Section: Saponinsmentioning

confidence: 77%