slightly outperformed the yeast group, followed by two weeks of equal performance, before weeks five and six saw the yeast-supplemented piglets taking a significant lead in ADG. At the end of the six weeks, the yeast-supplemented piglets were 225g/day ahead of the ZnO piglets.
Values represent ADG gain While the European trials showed that they clearly work positively together, it is also important to appreciate the individual roles being played by the two yeasts. The prime function of the yeast probiotic, for example, is to improve the microbiome, a process which starts immediately after supplementation, but which takes time to be observed. While waiting for the full impact of the supplement to take effect, it is important to help piglets cope with the risk that certain pathogens may cause health issues during the early weaning period. This is where the yeast postbiotic comes in, acting as a form of “magnet” for bacteria like Escherichia coli and Salmonella species. Such bacteria are rendered harmless once they are bound to the premium yeast fraction, enabling them to be excreted in the faeces. The use of the yeast probiotic as a dietary supplement has also been shown to be valuable in relation to sows, helping to produce a strong increase of beneficial microbes in their off- spring, as was already shown by the French National Institute for Agricultural Research (INRA) in 2002. The role of the pure yeast extract, meanwhile, is important as a dietary consideration for use with piglets just before and
after weaning as a boost to feed intake. This is an issue which is often linked to disrupted gut development at weaning, cre- ating opportunities for potential pathogens to damage piglet health and performance. As a pure yeast extract it has a high concentration of crude protein and is highly digestible due to its small sized pep- tides. Those are qualities which help to enhance weaner diets in relation to protein digestibility, fibre content and palatability. A synthesis of trials which compared piglets on a basal diet with piglets fed the basal diet plus this pure yeast extract showed marked benefits for the yeast group, which recorded a 39g/head advantage in ADG over the basal group and a 16g/head advantage in Average Daily Feed Intake (ADFI).
Helping pig producers The company has drawn on evidence from trials carried out over the last five years in Denmark, France, Brazil, the Nether- lands and Hungary, in devising its “Program Zero ZnO”. The programme helps pig producers move away from their for- mer dependence on ZnO without suffering any loss of piglet health or performance. The core pillars of the programme are modifying the microbiome, reducing pathogen pressure and enhancing feed intake. The programme also highlights the success being made in reducing the need for pharmaceuticals and antibiotics to improve piglet performance under modern post-ZnO weaning regimes.
▶ PIG PROGRESS | Volume 38, No. 3, 2022 47
The task is to infuse the guts of young pig- lets with high concentrations of beneficial bacteria.
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