search.noResults

search.searching

dataCollection.invalidEmail
note.createNoteMessage

search.noResults

search.searching

orderForm.title

orderForm.productCode
orderForm.description
orderForm.quantity
orderForm.itemPrice
orderForm.price
orderForm.totalPrice
orderForm.deliveryDetails.billingAddress
orderForm.deliveryDetails.deliveryAddress
orderForm.noItems
South Dakota State University in Brookings, SD, USA, found that titers for all four viruses tested (Senecavirus A, porcine epidemic diarrhoea virus (PEDv), porcine reproductive and respiratory syndrome virus (PRRSv) and bovine herpesvirus type 1) were reduced by the presence of additives based on a blend of medium chain fatty acids. “Most” of the four viruses were mitigated by a Novus product containing a blend of or- ganic acids and an analogue of the amino acid methionine (analogues HMTBa and HMTBa-Ca are authorised feed addi- tives in the EU). However, the researchers noted that “further studies are warranted to assess the mechanism of action of those products and to assess their efficacy following natural ingestion of contaminated and mitigated feed.” Methionine is available in several forms for livestock feed: DL-Methionine (DL-Met, considered the standard methionine source), liquid methionine hydroxy analogue-free acid, calci- um salt of hydroxy analogue of methionine, and L-Methio- nine (L-Met), which became available on the market about a year ago. Recent research has found that “DL-Met and L-Met are equally bioavailable as methionine sources that can be used to optimise the performance, gut integrity and antioxi- dant status of pigs”.


New and novel In terms of other new developments in supplements for liq- uid feeds, Huber points to the work of her master’s student Michelina Crosbie, who is studying the digestibility of black soldier fly larvae meal, which could be used as a supple- ment in both liquid and dry feeds.


“There is evidence that it can provide gut health benefits for pigs on early nursery diets,” says Huber, “and therefore part- ly serve as a replacement for in-feed anti-microbials.” The meal contains lauric acid, a medium-chain fatty acid that’s been shown, like other acids, to promote gut health. It also contains chitin, from the insect exoskeleton, which can also help create a healthy gut microbiome. Huber would like to see nursery pigs receive liquid feed af- ter weaning, but notes that this is costly and not a lot of barns worldwide are set up for it. Bebber also believes liquid feed has “huge advantages” for neonatal or suckling pigs that are too weak to eat or breast- feed, or for sick animals that stop eating solid foods but keep drinking. He notes that, typically, these pigs benefit the most from antibiotic-replacement ingredients such as yeast and yeast derivatives, “as these supplements help to improve the health, well-being and performance of animals. Yeast Mannan Oligosaccharides (MOS) and beta-glucans are most beneficial for animals that are exposed to stressful conditions or in a poor state of health. They are also used prophylactically in healthy populations.” Bebber adds that since the ban on antibiotic growth-pro- moters in Europe, there has been a significant increase in the use of these derivatives in pig feed. Looking ahead, Bebber and his colleagues “furthermore be- lieve that the importance of scientific understanding of the composition, molecular structure and mode of action of such supplements will increase, because [this understanding] al- lows much more targeted and efficient use”.


▶PIG PROGRESS | Volume 36, No. 4, 2020


Feed additives such as acids, probiotics and phytogenics in both dry and liq- uid forms have gained more at- tention after producers start- ed seeking alter- natives to antibiotics.


33


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52